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psblas3:
base/serial/impl/psb_c_base_mat_impl.F90 base/serial/impl/psb_d_base_mat_impl.F90 base/serial/impl/psb_s_base_mat_impl.F90 base/serial/impl/psb_z_base_mat_impl.F90 krylov/psb_cbicg.f90 krylov/psb_ccg.f90 krylov/psb_ccgs.f90 krylov/psb_ccgstab.f90 krylov/psb_ccgstabl.f90 krylov/psb_ckrylov.f90 krylov/psb_crgmres.f90 krylov/psb_dbicg.f90 krylov/psb_dcg.f90 krylov/psb_dcgs.f90 krylov/psb_dcgstab.f90 krylov/psb_dcgstabl.f90 krylov/psb_dkrylov.f90 krylov/psb_drgmres.f90 krylov/psb_sbicg.f90 krylov/psb_scg.f90 krylov/psb_scgs.f90 krylov/psb_scgstab.f90 krylov/psb_scgstabl.f90 krylov/psb_skrylov.f90 krylov/psb_srgmres.f90 krylov/psb_zbicg.f90 krylov/psb_zcg.f90 krylov/psb_zcgs.f90 krylov/psb_zcgstab.f90 krylov/psb_zcgstabl.f90 krylov/psb_zkrylov.f90 krylov/psb_zrgmres.f90 Added missing set_host() in vect_mv. Cleaned up the krylov methods.
This commit is contained in:
Salvatore Filippone
@@ -1483,7 +1483,7 @@ subroutine psb_c_base_vect_mv(alpha,a,x,beta,y,info,trans)
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call x%sync()
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call y%sync()
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call a%csmm(alpha,x%v,beta,y%v,info,trans)
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call y%set_host()
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end subroutine psb_c_base_vect_mv
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subroutine psb_c_base_vect_cssv(alpha,a,x,beta,y,info,trans,scale,d)
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@@ -1483,7 +1483,7 @@ subroutine psb_d_base_vect_mv(alpha,a,x,beta,y,info,trans)
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call x%sync()
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call y%sync()
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call a%csmm(alpha,x%v,beta,y%v,info,trans)
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call y%set_host()
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end subroutine psb_d_base_vect_mv
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subroutine psb_d_base_vect_cssv(alpha,a,x,beta,y,info,trans,scale,d)
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@@ -1483,7 +1483,7 @@ subroutine psb_s_base_vect_mv(alpha,a,x,beta,y,info,trans)
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call x%sync()
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call y%sync()
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call a%csmm(alpha,x%v,beta,y%v,info,trans)
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call y%set_host()
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end subroutine psb_s_base_vect_mv
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subroutine psb_s_base_vect_cssv(alpha,a,x,beta,y,info,trans,scale,d)
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@@ -1483,7 +1483,7 @@ subroutine psb_z_base_vect_mv(alpha,a,x,beta,y,info,trans)
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call x%sync()
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call y%sync()
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call a%csmm(alpha,x%v,beta,y%v,info,trans)
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call y%set_host()
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end subroutine psb_z_base_vect_mv
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subroutine psb_z_base_vect_cssv(alpha,a,x,beta,y,info,trans,scale,d)
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@@ -93,243 +93,6 @@
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! estimate of) residual.
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!
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!
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!!$subroutine psb_cbicg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
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!!$ use psb_base_mod
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!!$ use psb_prec_mod
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!!$ use psb_c_krylov_conv_mod
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!!$ use psb_krylov_mod
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!!$ implicit none
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!!$
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!!$! !$ parameters
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!!$ type(psb_cspmat_type), intent(in) :: a
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!!$ class(psb_cprec_type), intent(in) :: prec
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!!$ type(psb_desc_type), intent(in) :: desc_a
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!!$ complex(psb_spk_), intent(in) :: b(:)
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!!$ complex(psb_spk_), intent(inout) :: x(:)
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!!$ real(psb_spk_), intent(in) :: eps
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!!$ integer(psb_ipk_), intent(out) :: info
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!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace, istop
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!!$ integer(psb_ipk_), optional, intent(out) :: iter
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!!$ real(psb_spk_), optional, intent(out) :: err
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!!$! !$ local data
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!!$ complex(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
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!!$ complex(psb_spk_), pointer :: ww(:), q(:),&
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!!$ & r(:), p(:), zt(:), pt(:), z(:), rt(:),qt(:)
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!!$ integer(psb_ipk_) :: int_err(5)
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!!$ integer(psb_ipk_) ::itmax_, naux, mglob, it, itrace_,&
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!!$ & np,me, n_row, n_col, istop_, err_act
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!!$ integer(psb_ipk_) :: debug_level, debug_unit
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!!$ logical, parameter :: exchange=.true., noexchange=.false.
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!!$ integer(psb_ipk_), parameter :: irmax = 8
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!!$ integer(psb_ipk_) :: itx, ictxt
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!!$ complex(psb_spk_) :: alpha, beta, rho, rho_old, sigma
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!!$ type(psb_itconv_type) :: stopdat
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!!$ real(psb_dpk_) :: derr
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!!$ character(len=20) :: name,ch_err
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!!$ character(len=*), parameter :: methdname='BiCG'
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!!$
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!!$ info = psb_success_
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!!$ name = 'psb_cbicg'
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!!$ call psb_erractionsave(err_act)
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!!$ debug_unit = psb_get_debug_unit()
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!!$ debug_level = psb_get_debug_level()
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!!$
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!!$ ictxt = desc_a%get_context()
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!!$ call psb_info(ictxt, me, np)
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!!$ if (debug_level >= psb_debug_ext_)&
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!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
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!!$
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!!$ mglob = desc_a%get_global_rows()
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!!$ n_row = desc_a%get_local_rows()
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!!$ n_col = desc_a%get_local_cols()
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!!$
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!!$
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!!$ if (present(istop)) then
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!!$ istop_ = istop
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!!$ else
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!!$ istop_ = 2
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!!$ endif
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!!$ !
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!!$ ! istop_ = 1: normwise backward error, infinity norm
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!!$ ! istop_ = 2: ||r||/||b|| norm 2
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!!$ !
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!!$
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!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
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!!$ info=psb_err_invalid_istop_
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!!$ int_err=istop_
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!!$ err=info
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!!$ call psb_errpush(info,name,i_err=int_err)
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!!$ goto 9999
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!!$ endif
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!!$
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!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
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!!$ if(info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_
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!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
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!!$ goto 9999
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!!$ end if
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!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
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!!$ if(info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_
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!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
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!!$ goto 9999
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!!$ end if
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!!$
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!!$
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!!$ naux=4*n_col
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!!$
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!!$ allocate(aux(naux),stat=info)
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!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=9)
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!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
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!!$ if(info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_non_
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!!$ ch_err='psb_asb'
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!!$ err=info
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!!$ call psb_errpush(info,name,a_err=ch_err)
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ q => wwrk(:,1)
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!!$ qt => wwrk(:,2)
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!!$ r => wwrk(:,3)
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!!$ rt => wwrk(:,4)
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!!$ p => wwrk(:,5)
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!!$ pt => wwrk(:,6)
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!!$ z => wwrk(:,7)
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!!$ zt => wwrk(:,8)
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!!$ ww => wwrk(:,9)
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!!$
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!!$ if (present(itmax)) then
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!!$ itmax_ = itmax
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!!$ else
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!!$ itmax_ = 1000
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!!$ endif
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!!$
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!!$ if (present(itrace)) then
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!!$ itrace_ = itrace
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!!$ else
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!!$ itrace_ = 0
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!!$ end if
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!!$
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!!$ itx = 0
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!!$
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!!$
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!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
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!!$ if (info /= psb_success_) Then
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!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
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!!$ goto 9999
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!!$ End If
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!!$
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!!$ restart: do
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!!$! !$
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!!$! !$ r0 = b-ax0
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!!$! !$
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!!$ if (itx >= itmax_) exit restart
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!!$ it = 0
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!!$ call psb_geaxpby(cone,b,czero,r,desc_a,info)
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!!$ if (info == psb_success_) call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
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!!$ if (debug_level >= psb_debug_ext_)&
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!!$ & write(debug_unit,*) me,' ',trim(name),' cone spmm',info
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!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,rt,desc_a,info)
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!!$ if(info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_non_
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!!$ call psb_errpush(info,name)
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ rho = czero
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!!$
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!!$ ! Perhaps we already satisfy the convergence criterion...
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!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
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!!$ if (info /= psb_success_) Then
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!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
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!!$ goto 9999
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!!$ End If
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!!$
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!!$ iteration: do
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!!$ it = it + 1
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!!$ itx = itx + 1
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!!$
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
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!!$
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!!$ call prec%apply(r,z,desc_a,info,work=aux)
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!!$ if (info == psb_success_) call prec%apply(rt,zt,desc_a,info,trans='c',work=aux)
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!!$
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!!$ rho_old = rho
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!!$ rho = psb_gedot(rt,z,desc_a,info)
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!!$ if (rho == czero) then
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' iteration breakdown r',rho
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!!$ exit iteration
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!!$ endif
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!!$
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!!$ if (it == 1) then
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!!$ call psb_geaxpby(cone,z,czero,p,desc_a,info)
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!!$ call psb_geaxpby(cone,zt,czero,pt,desc_a,info)
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!!$ else
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!!$ beta = (rho/rho_old)
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!!$ call psb_geaxpby(cone,z,(beta),p,desc_a,info)
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!!$ call psb_geaxpby(cone,zt,(beta),pt,desc_a,info)
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!!$ end if
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!!$
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!!$ call psb_spmm(cone,a,p,czero,q,desc_a,info,&
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!!$ & work=aux)
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!!$ call psb_spmm(cone,a,pt,czero,qt,desc_a,info,&
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!!$ & work=aux,trans='c')
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!!$
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!!$ sigma = psb_gedot(pt,q,desc_a,info)
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!!$ if (sigma == czero) then
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' iteration breakdown s1', sigma
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!!$ exit iteration
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!!$ endif
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!!$
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!!$ alpha = rho/sigma
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!!$
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!!$
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!!$ call psb_geaxpby((alpha),p,cone,x,desc_a,info)
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!!$ call psb_geaxpby(-(alpha),q,cone,r,desc_a,info)
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!!$ call psb_geaxpby(-(alpha),qt,cone,rt,desc_a,info)
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!!$
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!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
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!!$ if (info /= psb_success_) Then
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!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
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!!$ goto 9999
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!!$ End If
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!!$
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!!$ end do iteration
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!!$ end do restart
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!!$
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!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
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!!$
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!!$ if (present(err)) then
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!!$ err = derr
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!!$ end if
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!!$
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!!$ deallocate(aux, stat=info)
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!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
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!!$ if (info /= psb_success_) then
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!!$ call psb_errpush(info,name)
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ call psb_erractionrestore(err_act)
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!!$ return
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!!$
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!!$9999 continue
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!!$ call psb_erractionrestore(err_act)
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!!$ if (err_act == psb_act_abort_) then
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!!$ call psb_error()
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!!$ return
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!!$ end if
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!!$ return
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!!$
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!!$end subroutine psb_cbicg
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!!$
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subroutine psb_cbicg_vect(a,prec,b,x,eps,desc_a,info,&
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& itmax,iter,err,itrace,istop)
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@@ -95,190 +95,6 @@
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! estimate of) residual.
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!
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!
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!!$subroutine psb_ccg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
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!!$ use psb_base_mod
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!!$ use psb_prec_mod
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!!$ use psb_c_krylov_conv_mod
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!!$ use psb_krylov_mod
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!!$ implicit none
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!!$
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!!$! = Parameters
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!!$ Type(psb_cspmat_type), Intent(in) :: a
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!!$ class(psb_cprec_type), Intent(in) :: prec
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!!$ Type(psb_desc_type), Intent(in) :: desc_a
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!!$ complex(psb_spk_), Intent(in) :: b(:)
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!!$ complex(psb_spk_), Intent(inout) :: x(:)
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!!$ Real(psb_spk_), Intent(in) :: eps
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!!$ integer(psb_ipk_), intent(out) :: info
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!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
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!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
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!!$ Real(psb_spk_), Optional, Intent(out) :: err
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!!$! = Local data
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!!$ complex(psb_spk_), allocatable, target :: aux(:), wwrk(:,:)
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!!$ complex(psb_spk_), pointer :: q(:), p(:), r(:), z(:), w(:)
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!!$ complex(psb_spk_) :: alpha, beta, rho, rho_old, sigma
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!!$ integer(psb_ipk_) :: itmax_, istop_, naux, mglob, it, itx, itrace_,&
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!!$ & np,me, n_col, isvch, ictxt, n_row,err_act, int_err(5)
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!!$ integer(psb_ipk_) :: debug_level, debug_unit
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!!$ type(psb_itconv_type) :: stopdat
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!!$ real(psb_dpk_) :: derr
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!!$ character(len=20) :: name
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!!$ character(len=*), parameter :: methdname='CG'
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!!$
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!!$ info = psb_success_
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!!$ name = 'psb_ccg'
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!!$ call psb_erractionsave(err_act)
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!!$ debug_unit = psb_get_debug_unit()
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!!$ debug_level = psb_get_debug_level()
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!!$
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!!$ ictxt = desc_a%get_context()
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!!$
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!!$ call psb_info(ictxt, me, np)
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!!$
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!!$
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!!$ mglob = desc_a%get_global_rows()
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!!$ n_row = desc_a%get_local_rows()
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!!$ n_col = desc_a%get_local_cols()
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!!$
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!!$ if (present(istop)) then
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!!$ istop_ = istop
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!!$ else
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!!$ istop_ = 2
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!!$ endif
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!!$
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!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
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!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
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!!$ if(info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_
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!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ naux=4*n_col
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!!$ allocate(aux(naux), stat=info)
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!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=psb_err_invalid_input_)
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!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
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!!$ if (info /= psb_success_) then
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!!$ info=psb_err_from_subroutine_non_
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!!$ call psb_errpush(info,name)
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ p => wwrk(:,1)
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!!$ q => wwrk(:,2)
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!!$ r => wwrk(:,3)
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!!$ z => wwrk(:,4)
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!!$ w => wwrk(:,5)
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!!$
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx=0
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx>= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(cone,b,czero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = czero
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(r,z,desc_a,info)
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(cone,z,czero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ if (rho_old == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown rho'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ beta = rho/rho_old
|
||||
!!$ call psb_geaxpby(cone,z,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(cone,a,p,czero,q,desc_a,info,work=aux)
|
||||
!!$ sigma = psb_gedot(p,q,desc_a,info)
|
||||
!!$ if (sigma == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown sigma'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$ call psb_geaxpby(alpha,p,cone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-alpha,q,cone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_ccg
|
||||
!!$
|
||||
|
||||
subroutine psb_ccg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -92,238 +92,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$Subroutine psb_ccgs(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_c_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_cprec_type), Intent(in) :: prec
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ complex(psb_spk_), Pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), z(:), f(:), rt(:),qt(:),uv(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,int_err(5),&
|
||||
!!$ & np,me, n_row, n_col,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ complex(psb_spk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CGS'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_ccgs'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ Allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=11)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ v => wwrk(:,6)
|
||||
!!$ uv => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ f => wwrk(:,9)
|
||||
!!$ s => wwrk(:,10)
|
||||
!!$ ww => wwrk(:,11)
|
||||
!!$
|
||||
!!$
|
||||
!!$ If (Present(itmax)) Then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ Else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ If (Present(itrace)) Then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ Else
|
||||
!!$ itrace_ = 0
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(cone,b,czero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,rt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rho = czero
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(cone,r,czero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(cone,r,czero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(beta,q,cone,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,q,beta,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,uv,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(cone,a,f,czero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First loop part ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(rt,v,desc_a,info)
|
||||
!!$ if (sigma == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,uv,czero,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,cone,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,uv,czero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,q,cone,s,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,z,cone,x,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(cone,a,z,czero,qt,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,qt,cone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_ccgs
|
||||
|
||||
Subroutine psb_ccgs_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -93,263 +93,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$subroutine psb_ccgstab(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_c_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ Implicit None
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_cprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ complex(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ complex(psb_spk_), Pointer :: q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), t(:), z(:), f(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it,itrace_,&
|
||||
!!$ & np,me, n_row, n_col
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt, err_act
|
||||
!!$ integer(psb_ipk_) :: istop_
|
||||
!!$ complex(psb_spk_) :: alpha, beta, rho, rho_old, sigma, omega, tau
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_ccgstab'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=6*n_col
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=8)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ Q => WWRK(:,1)
|
||||
!!$ R => WWRK(:,2)
|
||||
!!$ P => WWRK(:,3)
|
||||
!!$ V => WWRK(:,4)
|
||||
!!$ F => WWRK(:,5)
|
||||
!!$ S => WWRK(:,6)
|
||||
!!$ T => WWRK(:,7)
|
||||
!!$ Z => WWRK(:,8)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(cone,b,czero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,q,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = czero
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' On entry to AMAX: B: ',Size(b)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: Do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ If (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(q,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown R',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(cone,r,czero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)*(alpha/omega)
|
||||
!!$ call psb_geaxpby(-omega,v,cone,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(cone,a,f,czero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) sigma = psb_gedot(q,v,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First step')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (sigma == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' SIGMA:',sigma
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ call psb_geaxpby(cone,r,czero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,cone,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_spmm(cone,a,z,czero,t,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='Second step ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(t,t,desc_a,info)
|
||||
!!$ if (sigma == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S2', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ tau = psb_gedot(t,s,desc_a,info)
|
||||
!!$ omega = tau/sigma
|
||||
!!$
|
||||
!!$ if (omega == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown O',omega
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,f,cone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(omega,z,cone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,s,czero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-omega,t,cone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_ccgstab
|
||||
|
||||
|
||||
Subroutine psb_ccgstab_vect(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
use psb_prec_mod
|
||||
|
||||
@@ -103,311 +103,6 @@
|
||||
!
|
||||
!
|
||||
!
|
||||
!!$Subroutine psb_ccgstabl(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_c_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_cprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_spk_), allocatable, target :: aux(:),wwrk(:,:),uh(:,:), rh(:,:)
|
||||
!!$ complex(psb_spk_), Pointer :: ww(:), q(:), r(:), rt0(:), p(:), v(:), &
|
||||
!!$ & s(:), t(:), z(:), f(:), gamma(:), gamma1(:), gamma2(:), taum(:,:), sigma(:)
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, err_act
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_,j, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ complex(psb_spk_) :: alpha, beta, rho, rho_old, rni, xni, bni, ani,bn2,&
|
||||
!!$ & omega
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab(L)'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_ccgstabl'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & 'present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),gamma(0:nl),gamma1(nl),&
|
||||
!!$ &gamma2(nl),taum(nl,nl),sigma(nl), stat=info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_alloc_dealloc_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=psb_err_iarg_neg_)
|
||||
!!$ if (info == psb_success_) Call psb_geall(uh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geall(rh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ r => wwrk(:,2)
|
||||
!!$ p => wwrk(:,3)
|
||||
!!$ v => wwrk(:,4)
|
||||
!!$ f => wwrk(:,5)
|
||||
!!$ s => wwrk(:,6)
|
||||
!!$ t => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$ rt0 => wwrk(:,10)
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' restart: ',itx,it
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(cone,b,czero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,rt0,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(cone,r,czero,rh(:,0),desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(czero,r,czero,uh(:,0),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = cone
|
||||
!!$ alpha = czero
|
||||
!!$ omega = cone
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + nl
|
||||
!!$ itx = itx + nl
|
||||
!!$ rho = -omega*rho
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration: ',itx, rho,rh(1,0)
|
||||
!!$
|
||||
!!$ do j = 0, nl -1
|
||||
!!$ If (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'bicg part: ',j, nl
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rh(:,j),rt0,desc_a,info)
|
||||
!!$ if (rho == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ beta = alpha*rho/rho_old
|
||||
!!$ rho_old = rho
|
||||
!!$ call psb_geaxpby(cone,rh(:,0:j),-beta,uh(:,0:j),desc_a,info)
|
||||
!!$ call psb_spmm(cone,a,uh(:,j),czero,uh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(uh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ gamma(j) = psb_gedot(uh(:,j+1),rt0,desc_a,info)
|
||||
!!$
|
||||
!!$ if (gamma(j) == czero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown s2',gamma(j)
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ alpha = rho/gamma(j)
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bicg part: alpha=r/g ',alpha,rho,gamma(j)
|
||||
!!$
|
||||
!!$ call psb_geaxpby(-alpha,uh(:,1:j+1),cone,rh(:,0:j),desc_a,info)
|
||||
!!$ call psb_geaxpby(alpha,uh(:,0),cone,x,desc_a,info)
|
||||
!!$ call psb_spmm(cone,a,rh(:,j),czero,rh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(rh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1, nl
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' mod g-s part: ',j, nl,rh(1,0)
|
||||
!!$
|
||||
!!$ do i=1, j-1
|
||||
!!$ taum(i,j) = psb_gedot(rh(:,i),rh(:,j),desc_a,info)
|
||||
!!$ taum(i,j) = taum(i,j)/sigma(i)
|
||||
!!$ call psb_geaxpby(-taum(i,j),rh(:,i),cone,rh(:,j),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$ sigma(j) = psb_gedot(rh(:,j),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = psb_gedot(rh(:,0),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = gamma1(j)/sigma(j)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ gamma(nl) = gamma1(nl)
|
||||
!!$ omega = gamma(nl)
|
||||
!!$
|
||||
!!$ do j=nl-1,1,-1
|
||||
!!$ gamma(j) = gamma1(j)
|
||||
!!$ do i=j+1,nl
|
||||
!!$ gamma(j) = gamma(j) - taum(j,i) * gamma(i)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1,nl-1
|
||||
!!$ gamma2(j) = gamma(j+1)
|
||||
!!$ do i=j+1,nl-1
|
||||
!!$ gamma2(j) = gamma2(j) + taum(j,i) * gamma(i+1)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ call psb_geaxpby(gamma(1),rh(:,0),cone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(nl),rh(:,nl),cone,rh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma(nl),uh(:,nl),cone,uh(:,0),desc_a,info)
|
||||
!!$
|
||||
!!$ do j=1, nl-1
|
||||
!!$ call psb_geaxpby(-gamma(j),uh(:,j),cone,uh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(gamma2(j),rh(:,j),cone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(j),rh(:,j),cone,rh(:,0),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,rh(:,0),desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_ccgstabl
|
||||
!!$
|
||||
|
||||
|
||||
Subroutine psb_ccgstabl_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
use psb_base_mod
|
||||
|
||||
+45
-211
@@ -33,217 +33,51 @@
|
||||
! File: psb_krylov_mod.f90
|
||||
! Interfaces for Krylov subspace iterative methods.
|
||||
!
|
||||
|
||||
!
|
||||
! Subroutine: psb_ckrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, complexversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_cspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_cprec_type) Input: preconditioner
|
||||
! b - complex,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - complex,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
!!$Subroutine psb_ckrylov(method,a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod,only : psb_sprec_type, psb_dprec_type, psb_cprec_type, psb_zprec_type
|
||||
!!$ use psb_krylov_mod, psb_protect_name => psb_ckrylov
|
||||
!!$ character(len=*) :: method
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ interface
|
||||
!!$ subroutine psb_ccg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ type(psb_cspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_ccg
|
||||
!!$ subroutine psb_cbicg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ type(psb_cspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_cbicg
|
||||
!!$ subroutine psb_ccgstab(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ type(psb_cspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_ccgstab
|
||||
!!$ Subroutine psb_ccgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_ccgstabl
|
||||
!!$ Subroutine psb_crgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_crgmres
|
||||
!!$ subroutine psb_ccgs(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_cspmat_type, psb_cprec_type
|
||||
!!$ type(psb_cspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_cprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_ccgs
|
||||
!!$ end interface
|
||||
!!$
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: ictxt,me,np,err_act
|
||||
!!$ character(len=20) :: name
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_krylov'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ictxt=desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ select case(psb_toupper(method))
|
||||
!!$ case('CG')
|
||||
!!$ call psb_ccg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('CGS')
|
||||
!!$ call psb_ccgs(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICG')
|
||||
!!$ call psb_cbicg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICGSTAB')
|
||||
!!$ call psb_ccgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,istop)
|
||||
!!$ case('RGMRES')
|
||||
!!$ call psb_crgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case('BICGSTABL')
|
||||
!!$ call psb_ccgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case default
|
||||
!!$ if (me == 0) write(psb_err_unit,*) trim(name),': Warning: Unknown method ',method,&
|
||||
!!$ & ', defaulting to BiCGSTAB'
|
||||
!!$ call psb_ccgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ end select
|
||||
!!$
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$end subroutine psb_ckrylov
|
||||
|
||||
!
|
||||
! Subroutine: psb_ckrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, complexversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_cspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_cprec_type) Input: preconditioner
|
||||
! b - complex,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - complex,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
Subroutine psb_ckrylov_vect(method,a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop,cond)
|
||||
|
||||
|
||||
+2
-365
@@ -105,369 +105,6 @@
|
||||
! estimate of) residual.
|
||||
! irst - integer(optional) Input: restart parameter
|
||||
!
|
||||
!!$Subroutine psb_crgmres(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_c_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_cspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_cprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_spk_), allocatable, target :: aux(:),w(:),w1(:), v(:,:)
|
||||
!!$ complex(psb_spk_), allocatable :: c(:),s(:), h(:,:), rs(:),rst(:),xt(:)
|
||||
!!$ Real(psb_spk_) :: tmp
|
||||
!!$ complex(psb_spk_) :: rti, rti1, scal
|
||||
!!$ integer(psb_ipk_) ::litmax, naux, mglob, it,k, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, int_err(5)
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ Real(psb_dpk_) :: rni, xni, bni, ani,bn2
|
||||
!!$ real(psb_dpk_) :: errnum, errden, deps, derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='RGMRES'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_cgmres'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! ISTOP_ = 1: Normwise backward error, infinity norm
|
||||
!!$ ! ISTOP_ = 2: ||r||/||b||, 2-norm
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ litmax = itmax
|
||||
!!$ else
|
||||
!!$ litmax = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 10
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,1),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),h(nl+1,nl+1),&
|
||||
!!$ &c(nl+1),s(nl+1),rs(nl+1), rst(nl+1),stat=info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) Call psb_geall(v,desc_a,info,n=nl+1)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(xt,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Size of V,W,W1 ',size(v),size(v,1),&
|
||||
!!$ & size(w),size(w,1),size(w1),size(w1,1), size(v(:,1))
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ ani = psb_spnrmi(a,desc_a,info)
|
||||
!!$ bni = psb_geamax(b,desc_a,info)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ bn2 = psb_genrm2(b,desc_a,info)
|
||||
!!$ endif
|
||||
!!$ errnum = dzero
|
||||
!!$ errden = done
|
||||
!!$ deps = eps
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if ((itrace_ > 0).and.(me == 0)) call log_header(methdname)
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$
|
||||
!!$ ! compute r0 = b-ax0
|
||||
!!$ ! check convergence
|
||||
!!$ ! compute v1 = r0/||r0||_2
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' restart: ',itx,it
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(cone,b,czero,v(:,1),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(-cone,a,x,cone,v(:,1),desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rs(1) = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ rs(2:) = czero
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ scal=done/rs(1) ! rs(1) MIGHT BE VERY SMALL - USE DSCAL TO DEAL WITH IT?
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b),rs(1),scal
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! check convergence
|
||||
!!$ !
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ rni = psb_geamax(v(:,1),desc_a,info)
|
||||
!!$ xni = psb_geamax(x,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ rni = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (errnum <= deps*errden) exit restart
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ v(:,1) = v(:,1) * scal
|
||||
!!$
|
||||
!!$ if (itx >= litmax) exit restart
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! inner iterations
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ inner: Do i=1,nl
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(v(:,i),w1,desc_a,info)
|
||||
!!$ Call psb_spmm(cone,a,w1,czero,w,desc_a,info,work=aux)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ do k = 1, i
|
||||
!!$ h(k,i) = psb_gedot(v(:,k),w,desc_a,info)
|
||||
!!$ call psb_geaxpby(-h(k,i),v(:,k),cone,w,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ h(i+1,i) = psb_genrm2(w,desc_a,info)
|
||||
!!$ scal=done/h(i+1,i)
|
||||
!!$ call psb_geaxpby(scal,w,czero,v(:,i+1),desc_a,info)
|
||||
!!$ do k=2,i
|
||||
!!$ call crot(1,h(k-1,i),1,h(k,i),1,real(c(k-1)),s(k-1))
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ rti = h(i,i)
|
||||
!!$ rti1 = h(i+1,i)
|
||||
!!$ call crotg(rti,rti1,tmp,s(i))
|
||||
!!$ c(i) = cmplx(tmp,szero)
|
||||
!!$ call crot(1,h(i,i),1,h(i+1,i),1,real(c(i)),s(i))
|
||||
!!$ h(i+1,i) = czero
|
||||
!!$ call crot(1,rs(i),1,rs(i+1),1,real(c(i)),s(i))
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ !
|
||||
!!$ ! build x and then compute the residual and its infinity norm
|
||||
!!$ !
|
||||
!!$ rst = rs
|
||||
!!$ xt = czero
|
||||
!!$ call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rst,size(rst,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rst(1:nl)
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rst(k),v(:,k),cone,xt,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(cone,x,cone,xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(cone,b,czero,w1,desc_a,info)
|
||||
!!$ call psb_spmm(-cone,a,xt,cone,w1,desc_a,info,work=aux)
|
||||
!!$ rni = psb_geamax(w1,desc_a,info)
|
||||
!!$ xni = psb_geamax(xt,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! compute the residual 2-norm as byproduct of the solution
|
||||
!!$ ! procedure of the least-squares problem
|
||||
!!$ !
|
||||
!!$ rni = abs(rs(i+1))
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ If (errnum <= deps*errden) Then
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = czero
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),cone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(cone,w,cone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ exit restart
|
||||
!!$
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ end do inner
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call ctrsm('l','u','n','n',nl,1,cone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = czero
|
||||
!!$ do k=1, nl
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),cone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(cone,w,cone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ end do restart
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,ione,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ call log_end(methdname,me,itx,errnum,errden,deps,err=derr,iter=iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ deallocate(aux,h,c,s,rs,rst, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_crgmres
|
||||
|
||||
|
||||
|
||||
subroutine psb_crgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
@@ -738,7 +375,7 @@ subroutine psb_crgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rst,size(rst,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rst(1:nl)
|
||||
& ' Rebuild x-> RS:',rst(1:i)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rst(k),v(k),cone,xt,desc_a,info)
|
||||
end do
|
||||
@@ -774,7 +411,7 @@ subroutine psb_crgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rs,size(rs,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rs(1:nl)
|
||||
& ' Rebuild x-> RS:',rs(1:i)
|
||||
call w1%set(czero)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rs(k),v(k),cone,w1,desc_a,info)
|
||||
|
||||
@@ -93,243 +93,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_dbicg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! !$ parameters
|
||||
!!$ type(psb_dspmat_type), intent(in) :: a
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$! !$ local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_dpk_), pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), zt(:), pt(:), z(:), rt(:),qt(:)
|
||||
!!$ integer(psb_ipk_) :: int_err(5)
|
||||
!!$ integer(psb_ipk_) ::itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ logical, parameter :: exchange=.true., noexchange=.false.
|
||||
!!$ integer(psb_ipk_), parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, ictxt
|
||||
!!$ real(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name,ch_err
|
||||
!!$ character(len=*), parameter :: methdname='BiCG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dbicg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! istop_ = 1: normwise backward error, infinity norm
|
||||
!!$ ! istop_ = 2: ||r||/||b|| norm 2
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=9)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ ch_err='psb_asb'
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,a_err=ch_err)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ pt => wwrk(:,6)
|
||||
!!$ z => wwrk(:,7)
|
||||
!!$ zt => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! !$
|
||||
!!$! !$ r0 = b-ax0
|
||||
!!$! !$
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' done spmm',info
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,rt,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = dzero
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call prec%apply(rt,zt,desc_a,info,trans='c',work=aux)
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,z,desc_a,info)
|
||||
!!$ if (rho == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(done,z,dzero,p,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,zt,dzero,pt,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(done,z,(beta),p,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,zt,(beta),pt,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(done,a,p,dzero,q,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$ call psb_spmm(done,a,pt,dzero,qt,desc_a,info,&
|
||||
!!$ & work=aux,trans='c')
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(pt,q,desc_a,info)
|
||||
!!$ if (sigma == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_geaxpby((alpha),p,done,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),q,done,r,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),qt,done,rt,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_dbicg
|
||||
!!$
|
||||
|
||||
|
||||
subroutine psb_dbicg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
|
||||
@@ -95,190 +95,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_dcg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_dprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:), wwrk(:,:)
|
||||
!!$ real(psb_dpk_), pointer :: q(:), p(:), r(:), z(:), w(:)
|
||||
!!$ real(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ integer(psb_ipk_) :: itmax_, istop_, naux, mglob, it, itx, itrace_,&
|
||||
!!$ & np,me, n_col, isvch, ictxt, n_row,err_act, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dcg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux), stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=psb_err_invalid_input_)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ p => wwrk(:,1)
|
||||
!!$ q => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ z => wwrk(:,4)
|
||||
!!$ w => wwrk(:,5)
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx=0
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx>= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = dzero
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(r,z,desc_a,info)
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(done,z,dzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ if (rho_old == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown rho'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ beta = rho/rho_old
|
||||
!!$ call psb_geaxpby(done,z,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(done,a,p,dzero,q,desc_a,info,work=aux)
|
||||
!!$ sigma = psb_gedot(p,q,desc_a,info)
|
||||
!!$ if (sigma == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown sigma'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$ call psb_geaxpby(alpha,p,done,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-alpha,q,done,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_dcg
|
||||
!!$
|
||||
|
||||
subroutine psb_dcg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -92,238 +92,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$Subroutine psb_dcgs(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_dprec_type), Intent(in) :: prec
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_dpk_), Pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), z(:), f(:), rt(:),qt(:),uv(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,int_err(5),&
|
||||
!!$ & np,me, n_row, n_col,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ real(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CGS'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dcgs'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ Allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=11)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ v => wwrk(:,6)
|
||||
!!$ uv => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ f => wwrk(:,9)
|
||||
!!$ s => wwrk(:,10)
|
||||
!!$ ww => wwrk(:,11)
|
||||
!!$
|
||||
!!$
|
||||
!!$ If (Present(itmax)) Then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ Else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ If (Present(itrace)) Then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ Else
|
||||
!!$ itrace_ = 0
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,rt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rho = dzero
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(done,r,dzero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(done,r,dzero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(beta,q,done,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,q,beta,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,uv,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(done,a,f,dzero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First loop part ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(rt,v,desc_a,info)
|
||||
!!$ if (sigma == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,uv,dzero,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,done,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,uv,dzero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,q,done,s,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,z,done,x,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(done,a,z,dzero,qt,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,qt,done,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_dcgs
|
||||
|
||||
Subroutine psb_dcgs_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -93,263 +93,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$subroutine psb_dcgstab(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ Implicit None
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_dprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_dpk_), Pointer :: q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), t(:), z(:), f(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it,itrace_,&
|
||||
!!$ & np,me, n_row, n_col
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt, err_act
|
||||
!!$ integer(psb_ipk_) :: istop_
|
||||
!!$ real(psb_dpk_) :: alpha, beta, rho, rho_old, sigma, omega, tau
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dcgstab'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=6*n_col
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=8)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ Q => WWRK(:,1)
|
||||
!!$ R => WWRK(:,2)
|
||||
!!$ P => WWRK(:,3)
|
||||
!!$ V => WWRK(:,4)
|
||||
!!$ F => WWRK(:,5)
|
||||
!!$ S => WWRK(:,6)
|
||||
!!$ T => WWRK(:,7)
|
||||
!!$ Z => WWRK(:,8)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,q,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = dzero
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' On entry to AMAX: B: ',Size(b)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: Do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ If (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(q,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown R',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(done,r,dzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)*(alpha/omega)
|
||||
!!$ call psb_geaxpby(-omega,v,done,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(done,a,f,dzero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) sigma = psb_gedot(q,v,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First step')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (sigma == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' SIGMA:',sigma
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ call psb_geaxpby(done,r,dzero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,done,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_spmm(done,a,z,dzero,t,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='Second step ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(t,t,desc_a,info)
|
||||
!!$ if (sigma == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S2', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ tau = psb_gedot(t,s,desc_a,info)
|
||||
!!$ omega = tau/sigma
|
||||
!!$
|
||||
!!$ if (omega == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown O',omega
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,f,done,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(omega,z,done,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,s,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-omega,t,done,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_dcgstab
|
||||
|
||||
|
||||
Subroutine psb_dcgstab_vect(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
use psb_prec_mod
|
||||
|
||||
@@ -103,311 +103,6 @@
|
||||
!
|
||||
!
|
||||
!
|
||||
!!$Subroutine psb_dcgstabl(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_dprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:),uh(:,:), rh(:,:)
|
||||
!!$ real(psb_dpk_), Pointer :: ww(:), q(:), r(:), rt0(:), p(:), v(:), &
|
||||
!!$ & s(:), t(:), z(:), f(:), gamma(:), gamma1(:), gamma2(:), taum(:,:), sigma(:)
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, err_act
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_,j, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ real(psb_dpk_) :: alpha, beta, rho, rho_old, rni, xni, bni, ani,bn2,&
|
||||
!!$ & omega
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab(L)'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dcgstabl'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & 'present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),gamma(0:nl),gamma1(nl),&
|
||||
!!$ &gamma2(nl),taum(nl,nl),sigma(nl), stat=info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_alloc_dealloc_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=psb_err_iarg_neg_)
|
||||
!!$ if (info == psb_success_) Call psb_geall(uh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geall(rh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ r => wwrk(:,2)
|
||||
!!$ p => wwrk(:,3)
|
||||
!!$ v => wwrk(:,4)
|
||||
!!$ f => wwrk(:,5)
|
||||
!!$ s => wwrk(:,6)
|
||||
!!$ t => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$ rt0 => wwrk(:,10)
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' restart: ',itx,it
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,rt0,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(done,r,dzero,rh(:,0),desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(dzero,r,dzero,uh(:,0),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = done
|
||||
!!$ alpha = dzero
|
||||
!!$ omega = done
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + nl
|
||||
!!$ itx = itx + nl
|
||||
!!$ rho = -omega*rho
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration: ',itx, rho,rh(1,0)
|
||||
!!$
|
||||
!!$ do j = 0, nl -1
|
||||
!!$ If (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'bicg part: ',j, nl
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rh(:,j),rt0,desc_a,info)
|
||||
!!$ if (rho == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ beta = alpha*rho/rho_old
|
||||
!!$ rho_old = rho
|
||||
!!$ call psb_geaxpby(done,rh(:,0:j),-beta,uh(:,0:j),desc_a,info)
|
||||
!!$ call psb_spmm(done,a,uh(:,j),dzero,uh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(uh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ gamma(j) = psb_gedot(uh(:,j+1),rt0,desc_a,info)
|
||||
!!$
|
||||
!!$ if (gamma(j) == dzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown s2',gamma(j)
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ alpha = rho/gamma(j)
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bicg part: alpha=r/g ',alpha,rho,gamma(j)
|
||||
!!$
|
||||
!!$ call psb_geaxpby(-alpha,uh(:,1:j+1),done,rh(:,0:j),desc_a,info)
|
||||
!!$ call psb_geaxpby(alpha,uh(:,0),done,x,desc_a,info)
|
||||
!!$ call psb_spmm(done,a,rh(:,j),dzero,rh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(rh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1, nl
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' mod g-s part: ',j, nl,rh(1,0)
|
||||
!!$
|
||||
!!$ do i=1, j-1
|
||||
!!$ taum(i,j) = psb_gedot(rh(:,i),rh(:,j),desc_a,info)
|
||||
!!$ taum(i,j) = taum(i,j)/sigma(i)
|
||||
!!$ call psb_geaxpby(-taum(i,j),rh(:,i),done,rh(:,j),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$ sigma(j) = psb_gedot(rh(:,j),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = psb_gedot(rh(:,0),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = gamma1(j)/sigma(j)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ gamma(nl) = gamma1(nl)
|
||||
!!$ omega = gamma(nl)
|
||||
!!$
|
||||
!!$ do j=nl-1,1,-1
|
||||
!!$ gamma(j) = gamma1(j)
|
||||
!!$ do i=j+1,nl
|
||||
!!$ gamma(j) = gamma(j) - taum(j,i) * gamma(i)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1,nl-1
|
||||
!!$ gamma2(j) = gamma(j+1)
|
||||
!!$ do i=j+1,nl-1
|
||||
!!$ gamma2(j) = gamma2(j) + taum(j,i) * gamma(i+1)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ call psb_geaxpby(gamma(1),rh(:,0),done,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(nl),rh(:,nl),done,rh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma(nl),uh(:,nl),done,uh(:,0),desc_a,info)
|
||||
!!$
|
||||
!!$ do j=1, nl-1
|
||||
!!$ call psb_geaxpby(-gamma(j),uh(:,j),done,uh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(gamma2(j),rh(:,j),done,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(j),rh(:,j),done,rh(:,0),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,rh(:,0),desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_dcgstabl
|
||||
!!$
|
||||
|
||||
|
||||
Subroutine psb_dcgstabl_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
use psb_base_mod
|
||||
|
||||
+45
-211
@@ -33,217 +33,51 @@
|
||||
! File: psb_krylov_mod.f90
|
||||
! Interfaces for Krylov subspace iterative methods.
|
||||
!
|
||||
|
||||
!
|
||||
! Subroutine: psb_dkrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, realversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_dspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_dprec_type) Input: preconditioner
|
||||
! b - real,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - real,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
!!$Subroutine psb_dkrylov(method,a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod,only : psb_sprec_type, psb_dprec_type, psb_dprec_type, psb_zprec_type
|
||||
!!$ use psb_krylov_mod, psb_protect_name => psb_dkrylov
|
||||
!!$ character(len=*) :: method
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ interface
|
||||
!!$ subroutine psb_dcg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ type(psb_dspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_dcg
|
||||
!!$ subroutine psb_dbicg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ type(psb_dspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_dbicg
|
||||
!!$ subroutine psb_dcgstab(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ type(psb_dspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_dcgstab
|
||||
!!$ Subroutine psb_dcgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_dcgstabl
|
||||
!!$ Subroutine psb_drgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_drgmres
|
||||
!!$ subroutine psb_dcgs(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_dspmat_type, psb_dprec_type
|
||||
!!$ type(psb_dspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_dprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_dcgs
|
||||
!!$ end interface
|
||||
!!$
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: ictxt,me,np,err_act
|
||||
!!$ character(len=20) :: name
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_krylov'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ictxt=desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ select case(psb_toupper(method))
|
||||
!!$ case('CG')
|
||||
!!$ call psb_dcg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('CGS')
|
||||
!!$ call psb_dcgs(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICG')
|
||||
!!$ call psb_dbicg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICGSTAB')
|
||||
!!$ call psb_dcgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,istop)
|
||||
!!$ case('RGMRES')
|
||||
!!$ call psb_drgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case('BICGSTABL')
|
||||
!!$ call psb_dcgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case default
|
||||
!!$ if (me == 0) write(psb_err_unit,*) trim(name),': Warning: Unknown method ',method,&
|
||||
!!$ & ', defaulting to BiCGSTAB'
|
||||
!!$ call psb_dcgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ end select
|
||||
!!$
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$end subroutine psb_dkrylov
|
||||
|
||||
!
|
||||
! Subroutine: psb_dkrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, realversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_dspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_dprec_type) Input: preconditioner
|
||||
! b - real,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - real,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
Subroutine psb_dkrylov_vect(method,a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop,cond)
|
||||
|
||||
|
||||
+2
-365
@@ -105,369 +105,6 @@
|
||||
! estimate of) residual.
|
||||
! irst - integer(optional) Input: restart parameter
|
||||
!
|
||||
!!$Subroutine psb_drgmres(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_d_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_dspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_dprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_dpk_), allocatable, target :: aux(:),w(:),w1(:), v(:,:)
|
||||
!!$ real(psb_dpk_), allocatable :: c(:),s(:), h(:,:), rs(:),rst(:),xt(:)
|
||||
!!$ Real(psb_dpk_) :: tmp
|
||||
!!$ real(psb_dpk_) :: rti, rti1, scal
|
||||
!!$ integer(psb_ipk_) ::litmax, naux, mglob, it,k, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, int_err(5)
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ Real(psb_dpk_) :: rni, xni, bni, ani,bn2
|
||||
!!$ real(psb_dpk_) :: errnum, errden, deps, derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='RGMRES'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_dgmres'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! ISTOP_ = 1: Normwise backward error, infinity norm
|
||||
!!$ ! ISTOP_ = 2: ||r||/||b||, 2-norm
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ litmax = itmax
|
||||
!!$ else
|
||||
!!$ litmax = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 10
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,1),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),h(nl+1,nl+1),&
|
||||
!!$ &c(nl+1),s(nl+1),rs(nl+1), rst(nl+1),stat=info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) Call psb_geall(v,desc_a,info,n=nl+1)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(xt,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Size of V,W,W1 ',size(v),size(v,1),&
|
||||
!!$ & size(w),size(w,1),size(w1),size(w1,1), size(v(:,1))
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ ani = psb_spnrmi(a,desc_a,info)
|
||||
!!$ bni = psb_geamax(b,desc_a,info)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ bn2 = psb_genrm2(b,desc_a,info)
|
||||
!!$ endif
|
||||
!!$ errnum = dzero
|
||||
!!$ errden = done
|
||||
!!$ deps = eps
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if ((itrace_ > 0).and.(me == 0)) call log_header(methdname)
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$
|
||||
!!$ ! compute r0 = b-ax0
|
||||
!!$ ! check convergence
|
||||
!!$ ! compute v1 = r0/||r0||_2
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' restart: ',itx,it
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(done,b,dzero,v(:,1),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(-done,a,x,done,v(:,1),desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rs(1) = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ rs(2:) = dzero
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ scal=done/rs(1) ! rs(1) MIGHT BE VERY SMALL - USE DSCAL TO DEAL WITH IT?
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b),rs(1),scal
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! check convergence
|
||||
!!$ !
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ rni = psb_geamax(v(:,1),desc_a,info)
|
||||
!!$ xni = psb_geamax(x,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ rni = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (errnum <= deps*errden) exit restart
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ v(:,1) = v(:,1) * scal
|
||||
!!$
|
||||
!!$ if (itx >= litmax) exit restart
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! inner iterations
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ inner: Do i=1,nl
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(v(:,i),w1,desc_a,info)
|
||||
!!$ Call psb_spmm(done,a,w1,dzero,w,desc_a,info,work=aux)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ do k = 1, i
|
||||
!!$ h(k,i) = psb_gedot(v(:,k),w,desc_a,info)
|
||||
!!$ call psb_geaxpby(-h(k,i),v(:,k),done,w,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ h(i+1,i) = psb_genrm2(w,desc_a,info)
|
||||
!!$ scal=done/h(i+1,i)
|
||||
!!$ call psb_geaxpby(scal,w,dzero,v(:,i+1),desc_a,info)
|
||||
!!$ do k=2,i
|
||||
!!$ call drot(1,h(k-1,i),1,h(k,i),1,real(c(k-1)),s(k-1))
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ rti = h(i,i)
|
||||
!!$ rti1 = h(i+1,i)
|
||||
!!$ call drotg(rti,rti1,tmp,s(i))
|
||||
!!$ c(i) = cmplx(tmp,szero)
|
||||
!!$ call drot(1,h(i,i),1,h(i+1,i),1,real(c(i)),s(i))
|
||||
!!$ h(i+1,i) = dzero
|
||||
!!$ call drot(1,rs(i),1,rs(i+1),1,real(c(i)),s(i))
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ !
|
||||
!!$ ! build x and then compute the residual and its infinity norm
|
||||
!!$ !
|
||||
!!$ rst = rs
|
||||
!!$ xt = dzero
|
||||
!!$ call dtrsm('l','u','n','n',i,1,done,h,size(h,1),rst,size(rst,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rst(1:nl)
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rst(k),v(:,k),done,xt,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,x,done,xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,b,dzero,w1,desc_a,info)
|
||||
!!$ call psb_spmm(-done,a,xt,done,w1,desc_a,info,work=aux)
|
||||
!!$ rni = psb_geamax(w1,desc_a,info)
|
||||
!!$ xni = psb_geamax(xt,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! compute the residual 2-norm as byproduct of the solution
|
||||
!!$ ! procedure of the least-squares problem
|
||||
!!$ !
|
||||
!!$ rni = abs(rs(i+1))
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ If (errnum <= deps*errden) Then
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call dtrsm('l','u','n','n',i,1,done,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = dzero
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),done,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,w,done,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ exit restart
|
||||
!!$
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ end do inner
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call dtrsm('l','u','n','n',nl,1,done,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = dzero
|
||||
!!$ do k=1, nl
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),done,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(done,w,done,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ end do restart
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,ione,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ call log_end(methdname,me,itx,errnum,errden,deps,err=derr,iter=iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ deallocate(aux,h,c,s,rs,rst, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_drgmres
|
||||
|
||||
|
||||
|
||||
subroutine psb_drgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
@@ -738,7 +375,7 @@ subroutine psb_drgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call dtrsm('l','u','n','n',i,1,done,h,size(h,1),rst,size(rst,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rst(1:nl)
|
||||
& ' Rebuild x-> RS:',rst(1:i)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rst(k),v(k),done,xt,desc_a,info)
|
||||
end do
|
||||
@@ -774,7 +411,7 @@ subroutine psb_drgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call dtrsm('l','u','n','n',i,1,done,h,size(h,1),rs,size(rs,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rs(1:nl)
|
||||
& ' Rebuild x-> RS:',rs(1:i)
|
||||
call w1%set(dzero)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rs(k),v(k),done,w1,desc_a,info)
|
||||
|
||||
@@ -93,243 +93,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_sbicg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! !$ parameters
|
||||
!!$ type(psb_sspmat_type), intent(in) :: a
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$! !$ local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_spk_), pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), zt(:), pt(:), z(:), rt(:),qt(:)
|
||||
!!$ integer(psb_ipk_) :: int_err(5)
|
||||
!!$ integer(psb_ipk_) ::itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ logical, parameter :: exchange=.true., noexchange=.false.
|
||||
!!$ integer(psb_ipk_), parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, ictxt
|
||||
!!$ real(psb_spk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name,ch_err
|
||||
!!$ character(len=*), parameter :: methdname='BiCG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_sbicg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! istop_ = 1: normwise backward error, infinity norm
|
||||
!!$ ! istop_ = 2: ||r||/||b|| norm 2
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=9)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ ch_err='psb_asb'
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,a_err=ch_err)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ pt => wwrk(:,6)
|
||||
!!$ z => wwrk(:,7)
|
||||
!!$ zt => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! !$
|
||||
!!$! !$ r0 = b-ax0
|
||||
!!$! !$
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' sone spmm',info
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,rt,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = szero
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call prec%apply(rt,zt,desc_a,info,trans='c',work=aux)
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,z,desc_a,info)
|
||||
!!$ if (rho == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(sone,z,szero,p,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,zt,szero,pt,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(sone,z,(beta),p,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,zt,(beta),pt,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(sone,a,p,szero,q,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$ call psb_spmm(sone,a,pt,szero,qt,desc_a,info,&
|
||||
!!$ & work=aux,trans='c')
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(pt,q,desc_a,info)
|
||||
!!$ if (sigma == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_geaxpby((alpha),p,sone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),q,sone,r,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),qt,sone,rt,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_sbicg
|
||||
!!$
|
||||
|
||||
|
||||
subroutine psb_sbicg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
|
||||
@@ -95,190 +95,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_scg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_sprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:), wwrk(:,:)
|
||||
!!$ real(psb_spk_), pointer :: q(:), p(:), r(:), z(:), w(:)
|
||||
!!$ real(psb_spk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ integer(psb_ipk_) :: itmax_, istop_, naux, mglob, it, itx, itrace_,&
|
||||
!!$ & np,me, n_col, isvch, ictxt, n_row,err_act, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_scg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux), stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=psb_err_invalid_input_)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ p => wwrk(:,1)
|
||||
!!$ q => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ z => wwrk(:,4)
|
||||
!!$ w => wwrk(:,5)
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx=0
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx>= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = szero
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(r,z,desc_a,info)
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(sone,z,szero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ if (rho_old == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown rho'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ beta = rho/rho_old
|
||||
!!$ call psb_geaxpby(sone,z,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(sone,a,p,szero,q,desc_a,info,work=aux)
|
||||
!!$ sigma = psb_gedot(p,q,desc_a,info)
|
||||
!!$ if (sigma == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown sigma'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$ call psb_geaxpby(alpha,p,sone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-alpha,q,sone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_scg
|
||||
!!$
|
||||
|
||||
subroutine psb_scg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -92,238 +92,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$Subroutine psb_scgs(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_sprec_type), Intent(in) :: prec
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_spk_), Pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), z(:), f(:), rt(:),qt(:),uv(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,int_err(5),&
|
||||
!!$ & np,me, n_row, n_col,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ real(psb_spk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CGS'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_scgs'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ Allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=11)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ v => wwrk(:,6)
|
||||
!!$ uv => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ f => wwrk(:,9)
|
||||
!!$ s => wwrk(:,10)
|
||||
!!$ ww => wwrk(:,11)
|
||||
!!$
|
||||
!!$
|
||||
!!$ If (Present(itmax)) Then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ Else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ If (Present(itrace)) Then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ Else
|
||||
!!$ itrace_ = 0
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,rt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rho = szero
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(sone,r,szero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(sone,r,szero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(beta,q,sone,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,q,beta,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,uv,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(sone,a,f,szero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First loop part ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(rt,v,desc_a,info)
|
||||
!!$ if (sigma == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,uv,szero,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,sone,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,uv,szero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,q,sone,s,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,z,sone,x,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(sone,a,z,szero,qt,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,qt,sone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_scgs
|
||||
|
||||
Subroutine psb_scgs_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -93,263 +93,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$subroutine psb_scgstab(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ Implicit None
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_sprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ real(psb_spk_), Pointer :: q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), t(:), z(:), f(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it,itrace_,&
|
||||
!!$ & np,me, n_row, n_col
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt, err_act
|
||||
!!$ integer(psb_ipk_) :: istop_
|
||||
!!$ real(psb_spk_) :: alpha, beta, rho, rho_old, sigma, omega, tau
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_scgstab'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=6*n_col
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=8)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ Q => WWRK(:,1)
|
||||
!!$ R => WWRK(:,2)
|
||||
!!$ P => WWRK(:,3)
|
||||
!!$ V => WWRK(:,4)
|
||||
!!$ F => WWRK(:,5)
|
||||
!!$ S => WWRK(:,6)
|
||||
!!$ T => WWRK(:,7)
|
||||
!!$ Z => WWRK(:,8)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,q,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = szero
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' On entry to AMAX: B: ',Size(b)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: Do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ If (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(q,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown R',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(sone,r,szero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)*(alpha/omega)
|
||||
!!$ call psb_geaxpby(-omega,v,sone,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(sone,a,f,szero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) sigma = psb_gedot(q,v,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First step')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (sigma == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' SIGMA:',sigma
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ call psb_geaxpby(sone,r,szero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,sone,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_spmm(sone,a,z,szero,t,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='Second step ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(t,t,desc_a,info)
|
||||
!!$ if (sigma == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S2', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ tau = psb_gedot(t,s,desc_a,info)
|
||||
!!$ omega = tau/sigma
|
||||
!!$
|
||||
!!$ if (omega == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown O',omega
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,f,sone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(omega,z,sone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,s,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-omega,t,sone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_scgstab
|
||||
|
||||
|
||||
Subroutine psb_scgstab_vect(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
use psb_prec_mod
|
||||
|
||||
@@ -103,311 +103,6 @@
|
||||
!
|
||||
!
|
||||
!
|
||||
!!$Subroutine psb_scgstabl(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_sprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:),wwrk(:,:),uh(:,:), rh(:,:)
|
||||
!!$ real(psb_spk_), Pointer :: ww(:), q(:), r(:), rt0(:), p(:), v(:), &
|
||||
!!$ & s(:), t(:), z(:), f(:), gamma(:), gamma1(:), gamma2(:), taum(:,:), sigma(:)
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, err_act
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_,j, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ real(psb_spk_) :: alpha, beta, rho, rho_old, rni, xni, bni, ani,bn2,&
|
||||
!!$ & omega
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab(L)'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_scgstabl'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & 'present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),gamma(0:nl),gamma1(nl),&
|
||||
!!$ &gamma2(nl),taum(nl,nl),sigma(nl), stat=info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_alloc_dealloc_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=psb_err_iarg_neg_)
|
||||
!!$ if (info == psb_success_) Call psb_geall(uh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geall(rh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ r => wwrk(:,2)
|
||||
!!$ p => wwrk(:,3)
|
||||
!!$ v => wwrk(:,4)
|
||||
!!$ f => wwrk(:,5)
|
||||
!!$ s => wwrk(:,6)
|
||||
!!$ t => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$ rt0 => wwrk(:,10)
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' restart: ',itx,it
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,rt0,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(sone,r,szero,rh(:,0),desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(szero,r,szero,uh(:,0),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = sone
|
||||
!!$ alpha = szero
|
||||
!!$ omega = sone
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + nl
|
||||
!!$ itx = itx + nl
|
||||
!!$ rho = -omega*rho
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration: ',itx, rho,rh(1,0)
|
||||
!!$
|
||||
!!$ do j = 0, nl -1
|
||||
!!$ If (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'bicg part: ',j, nl
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rh(:,j),rt0,desc_a,info)
|
||||
!!$ if (rho == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ beta = alpha*rho/rho_old
|
||||
!!$ rho_old = rho
|
||||
!!$ call psb_geaxpby(sone,rh(:,0:j),-beta,uh(:,0:j),desc_a,info)
|
||||
!!$ call psb_spmm(sone,a,uh(:,j),szero,uh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(uh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ gamma(j) = psb_gedot(uh(:,j+1),rt0,desc_a,info)
|
||||
!!$
|
||||
!!$ if (gamma(j) == szero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown s2',gamma(j)
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ alpha = rho/gamma(j)
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bicg part: alpha=r/g ',alpha,rho,gamma(j)
|
||||
!!$
|
||||
!!$ call psb_geaxpby(-alpha,uh(:,1:j+1),sone,rh(:,0:j),desc_a,info)
|
||||
!!$ call psb_geaxpby(alpha,uh(:,0),sone,x,desc_a,info)
|
||||
!!$ call psb_spmm(sone,a,rh(:,j),szero,rh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(rh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1, nl
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' mod g-s part: ',j, nl,rh(1,0)
|
||||
!!$
|
||||
!!$ do i=1, j-1
|
||||
!!$ taum(i,j) = psb_gedot(rh(:,i),rh(:,j),desc_a,info)
|
||||
!!$ taum(i,j) = taum(i,j)/sigma(i)
|
||||
!!$ call psb_geaxpby(-taum(i,j),rh(:,i),sone,rh(:,j),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$ sigma(j) = psb_gedot(rh(:,j),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = psb_gedot(rh(:,0),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = gamma1(j)/sigma(j)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ gamma(nl) = gamma1(nl)
|
||||
!!$ omega = gamma(nl)
|
||||
!!$
|
||||
!!$ do j=nl-1,1,-1
|
||||
!!$ gamma(j) = gamma1(j)
|
||||
!!$ do i=j+1,nl
|
||||
!!$ gamma(j) = gamma(j) - taum(j,i) * gamma(i)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1,nl-1
|
||||
!!$ gamma2(j) = gamma(j+1)
|
||||
!!$ do i=j+1,nl-1
|
||||
!!$ gamma2(j) = gamma2(j) + taum(j,i) * gamma(i+1)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ call psb_geaxpby(gamma(1),rh(:,0),sone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(nl),rh(:,nl),sone,rh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma(nl),uh(:,nl),sone,uh(:,0),desc_a,info)
|
||||
!!$
|
||||
!!$ do j=1, nl-1
|
||||
!!$ call psb_geaxpby(-gamma(j),uh(:,j),sone,uh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(gamma2(j),rh(:,j),sone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(j),rh(:,j),sone,rh(:,0),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,rh(:,0),desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_scgstabl
|
||||
!!$
|
||||
|
||||
|
||||
Subroutine psb_scgstabl_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
use psb_base_mod
|
||||
|
||||
+45
-211
@@ -33,217 +33,51 @@
|
||||
! File: psb_krylov_mod.f90
|
||||
! Interfaces for Krylov subspace iterative methods.
|
||||
!
|
||||
|
||||
!
|
||||
! Subroutine: psb_skrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, realversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_sspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_sprec_type) Input: preconditioner
|
||||
! b - real,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - real,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
!!$Subroutine psb_skrylov(method,a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod,only : psb_sprec_type, psb_dprec_type, psb_sprec_type, psb_zprec_type
|
||||
!!$ use psb_krylov_mod, psb_protect_name => psb_skrylov
|
||||
!!$ character(len=*) :: method
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ interface
|
||||
!!$ subroutine psb_scg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ type(psb_sspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_scg
|
||||
!!$ subroutine psb_sbicg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ type(psb_sspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_sbicg
|
||||
!!$ subroutine psb_scgstab(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ type(psb_sspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_scgstab
|
||||
!!$ Subroutine psb_scgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_scgstabl
|
||||
!!$ Subroutine psb_srgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_srgmres
|
||||
!!$ subroutine psb_scgs(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_spk_, psb_desc_type, &
|
||||
!!$ & psb_sspmat_type, psb_sprec_type
|
||||
!!$ type(psb_sspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_spk_), intent(in) :: eps
|
||||
!!$ class(psb_sprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_spk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_scgs
|
||||
!!$ end interface
|
||||
!!$
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: ictxt,me,np,err_act
|
||||
!!$ character(len=20) :: name
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_krylov'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ictxt=desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ select case(psb_toupper(method))
|
||||
!!$ case('CG')
|
||||
!!$ call psb_scg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('CGS')
|
||||
!!$ call psb_scgs(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICG')
|
||||
!!$ call psb_sbicg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICGSTAB')
|
||||
!!$ call psb_scgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,istop)
|
||||
!!$ case('RGMRES')
|
||||
!!$ call psb_srgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case('BICGSTABL')
|
||||
!!$ call psb_scgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case default
|
||||
!!$ if (me == 0) write(psb_err_unit,*) trim(name),': Warning: Unknown method ',method,&
|
||||
!!$ & ', defaulting to BiCGSTAB'
|
||||
!!$ call psb_scgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ end select
|
||||
!!$
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$end subroutine psb_skrylov
|
||||
|
||||
!
|
||||
! Subroutine: psb_skrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, realversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_sspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_sprec_type) Input: preconditioner
|
||||
! b - real,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - real,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
Subroutine psb_skrylov_vect(method,a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop,cond)
|
||||
|
||||
|
||||
+2
-365
@@ -105,369 +105,6 @@
|
||||
! estimate of) residual.
|
||||
! irst - integer(optional) Input: restart parameter
|
||||
!
|
||||
!!$Subroutine psb_srgmres(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_s_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_sspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_sprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ real(psb_spk_), Intent(in) :: b(:)
|
||||
!!$ real(psb_spk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_spk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_spk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ real(psb_spk_), allocatable, target :: aux(:),w(:),w1(:), v(:,:)
|
||||
!!$ real(psb_spk_), allocatable :: c(:),s(:), h(:,:), rs(:),rst(:),xt(:)
|
||||
!!$ Real(psb_spk_) :: tmp
|
||||
!!$ real(psb_spk_) :: rti, rti1, scal
|
||||
!!$ integer(psb_ipk_) ::litmax, naux, mglob, it,k, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, int_err(5)
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ Real(psb_dpk_) :: rni, xni, bni, ani,bn2
|
||||
!!$ real(psb_dpk_) :: errnum, errden, deps, derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='RGMRES'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_sgmres'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! ISTOP_ = 1: Normwise backward error, infinity norm
|
||||
!!$ ! ISTOP_ = 2: ||r||/||b||, 2-norm
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ litmax = itmax
|
||||
!!$ else
|
||||
!!$ litmax = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 10
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,1),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),h(nl+1,nl+1),&
|
||||
!!$ &c(nl+1),s(nl+1),rs(nl+1), rst(nl+1),stat=info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) Call psb_geall(v,desc_a,info,n=nl+1)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(xt,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Size of V,W,W1 ',size(v),size(v,1),&
|
||||
!!$ & size(w),size(w,1),size(w1),size(w1,1), size(v(:,1))
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ ani = psb_spnrmi(a,desc_a,info)
|
||||
!!$ bni = psb_geamax(b,desc_a,info)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ bn2 = psb_genrm2(b,desc_a,info)
|
||||
!!$ endif
|
||||
!!$ errnum = dzero
|
||||
!!$ errden = done
|
||||
!!$ deps = eps
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if ((itrace_ > 0).and.(me == 0)) call log_header(methdname)
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$
|
||||
!!$ ! compute r0 = b-ax0
|
||||
!!$ ! check convergence
|
||||
!!$ ! compute v1 = r0/||r0||_2
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' restart: ',itx,it
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(sone,b,szero,v(:,1),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(-sone,a,x,sone,v(:,1),desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rs(1) = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ rs(2:) = szero
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ scal=done/rs(1) ! rs(1) MIGHT BE VERY SMALL - USE DSCAL TO DEAL WITH IT?
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b),rs(1),scal
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! check convergence
|
||||
!!$ !
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ rni = psb_geamax(v(:,1),desc_a,info)
|
||||
!!$ xni = psb_geamax(x,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ rni = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (errnum <= deps*errden) exit restart
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ v(:,1) = v(:,1) * scal
|
||||
!!$
|
||||
!!$ if (itx >= litmax) exit restart
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! inner iterations
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ inner: Do i=1,nl
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(v(:,i),w1,desc_a,info)
|
||||
!!$ Call psb_spmm(sone,a,w1,szero,w,desc_a,info,work=aux)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ do k = 1, i
|
||||
!!$ h(k,i) = psb_gedot(v(:,k),w,desc_a,info)
|
||||
!!$ call psb_geaxpby(-h(k,i),v(:,k),sone,w,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ h(i+1,i) = psb_genrm2(w,desc_a,info)
|
||||
!!$ scal=done/h(i+1,i)
|
||||
!!$ call psb_geaxpby(scal,w,szero,v(:,i+1),desc_a,info)
|
||||
!!$ do k=2,i
|
||||
!!$ call srot(1,h(k-1,i),1,h(k,i),1,real(c(k-1)),s(k-1))
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ rti = h(i,i)
|
||||
!!$ rti1 = h(i+1,i)
|
||||
!!$ call srotg(rti,rti1,tmp,s(i))
|
||||
!!$ c(i) = cmplx(tmp,szero)
|
||||
!!$ call srot(1,h(i,i),1,h(i+1,i),1,real(c(i)),s(i))
|
||||
!!$ h(i+1,i) = szero
|
||||
!!$ call srot(1,rs(i),1,rs(i+1),1,real(c(i)),s(i))
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ !
|
||||
!!$ ! build x and then compute the residual and its infinity norm
|
||||
!!$ !
|
||||
!!$ rst = rs
|
||||
!!$ xt = szero
|
||||
!!$ call strsm('l','u','n','n',i,1,sone,h,size(h,1),rst,size(rst,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rst(1:nl)
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rst(k),v(:,k),sone,xt,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,x,sone,xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,b,szero,w1,desc_a,info)
|
||||
!!$ call psb_spmm(-sone,a,xt,sone,w1,desc_a,info,work=aux)
|
||||
!!$ rni = psb_geamax(w1,desc_a,info)
|
||||
!!$ xni = psb_geamax(xt,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! compute the residual 2-norm as byproduct of the solution
|
||||
!!$ ! procedure of the least-squares problem
|
||||
!!$ !
|
||||
!!$ rni = abs(rs(i+1))
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ If (errnum <= deps*errden) Then
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call strsm('l','u','n','n',i,1,sone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = szero
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),sone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,w,sone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ exit restart
|
||||
!!$
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ end do inner
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call strsm('l','u','n','n',nl,1,sone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = szero
|
||||
!!$ do k=1, nl
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),sone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(sone,w,sone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ end do restart
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,ione,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ call log_end(methdname,me,itx,errnum,errden,deps,err=derr,iter=iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ deallocate(aux,h,c,s,rs,rst, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_srgmres
|
||||
|
||||
|
||||
|
||||
subroutine psb_srgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
@@ -738,7 +375,7 @@ subroutine psb_srgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call strsm('l','u','n','n',i,1,sone,h,size(h,1),rst,size(rst,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rst(1:nl)
|
||||
& ' Rebuild x-> RS:',rst(1:i)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rst(k),v(k),sone,xt,desc_a,info)
|
||||
end do
|
||||
@@ -774,7 +411,7 @@ subroutine psb_srgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call strsm('l','u','n','n',i,1,sone,h,size(h,1),rs,size(rs,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rs(1:nl)
|
||||
& ' Rebuild x-> RS:',rs(1:i)
|
||||
call w1%set(szero)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rs(k),v(k),sone,w1,desc_a,info)
|
||||
|
||||
@@ -93,243 +93,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_zbicg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! !$ parameters
|
||||
!!$ type(psb_zspmat_type), intent(in) :: a
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$! !$ local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ complex(psb_dpk_), pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), zt(:), pt(:), z(:), rt(:),qt(:)
|
||||
!!$ integer(psb_ipk_) :: int_err(5)
|
||||
!!$ integer(psb_ipk_) ::itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ logical, parameter :: exchange=.true., noexchange=.false.
|
||||
!!$ integer(psb_ipk_), parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, ictxt
|
||||
!!$ complex(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name,ch_err
|
||||
!!$ character(len=*), parameter :: methdname='BiCG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zbicg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! istop_ = 1: normwise backward error, infinity norm
|
||||
!!$ ! istop_ = 2: ||r||/||b|| norm 2
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=9)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ ch_err='psb_asb'
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,a_err=ch_err)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ pt => wwrk(:,6)
|
||||
!!$ z => wwrk(:,7)
|
||||
!!$ zt => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! !$
|
||||
!!$! !$ r0 = b-ax0
|
||||
!!$! !$
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' zone spmm',info
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,rt,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = zzero
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call prec%apply(rt,zt,desc_a,info,trans='c',work=aux)
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,z,desc_a,info)
|
||||
!!$ if (rho == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(zone,z,zzero,p,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,zt,zzero,pt,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(zone,z,(beta),p,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,zt,(beta),pt,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(zone,a,p,zzero,q,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$ call psb_spmm(zone,a,pt,zzero,qt,desc_a,info,&
|
||||
!!$ & work=aux,trans='c')
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(pt,q,desc_a,info)
|
||||
!!$ if (sigma == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_geaxpby((alpha),p,zone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),q,zone,r,desc_a,info)
|
||||
!!$ call psb_geaxpby(-(alpha),qt,zone,rt,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_zbicg
|
||||
!!$
|
||||
|
||||
|
||||
subroutine psb_zbicg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
|
||||
@@ -95,190 +95,6 @@
|
||||
! estimate of) residual.
|
||||
!
|
||||
!
|
||||
!!$subroutine psb_zcg(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_zprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:), wwrk(:,:)
|
||||
!!$ complex(psb_dpk_), pointer :: q(:), p(:), r(:), z(:), w(:)
|
||||
!!$ complex(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ integer(psb_ipk_) :: itmax_, istop_, naux, mglob, it, itx, itrace_,&
|
||||
!!$ & np,me, n_col, isvch, ictxt, n_row,err_act, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CG'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zcg'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux), stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=psb_err_invalid_input_)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ p => wwrk(:,1)
|
||||
!!$ q => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ z => wwrk(:,4)
|
||||
!!$ w => wwrk(:,5)
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx=0
|
||||
!!$
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx>= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = zzero
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(r,z,desc_a,info,work=aux)
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(r,z,desc_a,info)
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(zone,z,zzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ if (rho_old == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown rho'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ beta = rho/rho_old
|
||||
!!$ call psb_geaxpby(zone,z,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(zone,a,p,zzero,q,desc_a,info,work=aux)
|
||||
!!$ sigma = psb_gedot(p,q,desc_a,info)
|
||||
!!$ if (sigma == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ': CG Iteration breakdown sigma'
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$ call psb_geaxpby(alpha,p,zone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-alpha,q,zone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_zcg
|
||||
!!$
|
||||
|
||||
subroutine psb_zcg_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -92,238 +92,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$Subroutine psb_zcgs(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_zprec_type), Intent(in) :: prec
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ complex(psb_dpk_), Pointer :: ww(:), q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), z(:), f(:), rt(:),qt(:),uv(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,int_err(5),&
|
||||
!!$ & np,me, n_row, n_col,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ complex(psb_dpk_) :: alpha, beta, rho, rho_old, sigma
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='CGS'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zcgs'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ Allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=11)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ qt => wwrk(:,2)
|
||||
!!$ r => wwrk(:,3)
|
||||
!!$ rt => wwrk(:,4)
|
||||
!!$ p => wwrk(:,5)
|
||||
!!$ v => wwrk(:,6)
|
||||
!!$ uv => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ f => wwrk(:,9)
|
||||
!!$ s => wwrk(:,10)
|
||||
!!$ ww => wwrk(:,11)
|
||||
!!$
|
||||
!!$
|
||||
!!$ If (Present(itmax)) Then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ Else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ If (Present(itrace)) Then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ Else
|
||||
!!$ itrace_ = 0
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,rt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rho = zzero
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rt,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(zone,r,zzero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)
|
||||
!!$ call psb_geaxpby(zone,r,zzero,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(beta,q,zone,uv,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,q,beta,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,uv,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(zone,a,f,zzero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First loop part ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(rt,v,desc_a,info)
|
||||
!!$ if (sigma == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration breakdown s1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,uv,zzero,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,zone,q,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,uv,zzero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,q,zone,s,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,z,zone,x,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(zone,a,z,zzero,qt,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,qt,zone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$end subroutine psb_zcgs
|
||||
|
||||
Subroutine psb_zcgs_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
|
||||
@@ -93,263 +93,6 @@
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual.
|
||||
!
|
||||
!!$subroutine psb_zcgstab(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ Implicit None
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_zprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = Local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:)
|
||||
!!$ complex(psb_dpk_), Pointer :: q(:),&
|
||||
!!$ & r(:), p(:), v(:), s(:), t(:), z(:), f(:)
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it,itrace_,&
|
||||
!!$ & np,me, n_row, n_col
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ integer(psb_ipk_) :: itx, isvch, ictxt, err_act
|
||||
!!$ integer(psb_ipk_) :: istop_
|
||||
!!$ complex(psb_dpk_) :: alpha, beta, rho, rho_old, sigma, omega, tau
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zcgstab'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ If (Present(istop)) Then
|
||||
!!$ istop_ = istop
|
||||
!!$ Else
|
||||
!!$ istop_ = 2
|
||||
!!$ Endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=6*n_col
|
||||
!!$ allocate(aux(naux),stat=info)
|
||||
!!$ if (info == psb_success_) call psb_geall(wwrk,desc_a,info,n=8)
|
||||
!!$ if (info == psb_success_) call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ Q => WWRK(:,1)
|
||||
!!$ R => WWRK(:,2)
|
||||
!!$ P => WWRK(:,3)
|
||||
!!$ V => WWRK(:,4)
|
||||
!!$ F => WWRK(:,5)
|
||||
!!$ S => WWRK(:,6)
|
||||
!!$ T => WWRK(:,7)
|
||||
!!$ Z => WWRK(:,8)
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$
|
||||
!!$ restart: Do
|
||||
!!$! =
|
||||
!!$! = r0 = b-Ax0
|
||||
!!$! =
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,q,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = zzero
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' On entry to AMAX: B: ',Size(b)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ! Perhaps we already satisfy the convergence criterion...
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: Do
|
||||
!!$ it = it + 1
|
||||
!!$ itx = itx + 1
|
||||
!!$ If (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration: ',itx
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(q,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (rho == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown R',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (it == 1) then
|
||||
!!$ call psb_geaxpby(zone,r,zzero,p,desc_a,info)
|
||||
!!$ else
|
||||
!!$ beta = (rho/rho_old)*(alpha/omega)
|
||||
!!$ call psb_geaxpby(-omega,v,zone,p,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,beta,p,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(p,f,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_spmm(zone,a,f,zzero,v,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) sigma = psb_gedot(q,v,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='First step')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (sigma == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S1', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' SIGMA:',sigma
|
||||
!!$ alpha = rho/sigma
|
||||
!!$
|
||||
!!$ call psb_geaxpby(zone,r,zzero,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-alpha,v,zone,s,desc_a,info)
|
||||
!!$ if (info == psb_success_) call prec%apply(s,z,desc_a,info,work=aux)
|
||||
!!$ if (info == psb_success_) call psb_spmm(zone,a,z,zzero,t,desc_a,info,&
|
||||
!!$ & work=aux)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='Second step ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ sigma = psb_gedot(t,t,desc_a,info)
|
||||
!!$ if (sigma == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown S2', sigma
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ tau = psb_gedot(t,s,desc_a,info)
|
||||
!!$ omega = tau/sigma
|
||||
!!$
|
||||
!!$ if (omega == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Iteration breakdown O',omega
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(alpha,f,zone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(omega,z,zone,x,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,s,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(-omega,t,zone,r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='X update ')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_zcgstab
|
||||
|
||||
|
||||
Subroutine psb_zcgstab_vect(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,istop)
|
||||
use psb_base_mod
|
||||
use psb_prec_mod
|
||||
|
||||
@@ -103,311 +103,6 @@
|
||||
!
|
||||
!
|
||||
!
|
||||
!!$Subroutine psb_zcgstabl(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = parameters
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_zprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:),wwrk(:,:),uh(:,:), rh(:,:)
|
||||
!!$ complex(psb_dpk_), Pointer :: ww(:), q(:), r(:), rt0(:), p(:), v(:), &
|
||||
!!$ & s(:), t(:), z(:), f(:), gamma(:), gamma1(:), gamma2(:), taum(:,:), sigma(:)
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: itmax_, naux, mglob, it, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, err_act
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_,j, int_err(5)
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ complex(psb_dpk_) :: alpha, beta, rho, rho_old, rni, xni, bni, ani,bn2,&
|
||||
!!$ & omega
|
||||
!!$ type(psb_itconv_type) :: stopdat
|
||||
!!$ real(psb_dpk_) :: derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='BiCGStab(L)'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zcgstabl'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ itmax_ = itmax
|
||||
!!$ else
|
||||
!!$ itmax_ = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & 'present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 1
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X/B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),gamma(0:nl),gamma1(nl),&
|
||||
!!$ &gamma2(nl),taum(nl,nl),sigma(nl), stat=info)
|
||||
!!$
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_alloc_dealloc_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (info == psb_success_) Call psb_geall(wwrk,desc_a,info,n=psb_err_iarg_neg_)
|
||||
!!$ if (info == psb_success_) Call psb_geall(uh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geall(rh,desc_a,info,n=nl+1,lb=0)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ q => wwrk(:,1)
|
||||
!!$ r => wwrk(:,2)
|
||||
!!$ p => wwrk(:,3)
|
||||
!!$ v => wwrk(:,4)
|
||||
!!$ f => wwrk(:,5)
|
||||
!!$ s => wwrk(:,6)
|
||||
!!$ t => wwrk(:,7)
|
||||
!!$ z => wwrk(:,8)
|
||||
!!$ ww => wwrk(:,9)
|
||||
!!$ rt0 => wwrk(:,10)
|
||||
!!$
|
||||
!!$
|
||||
!!$ call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$! =
|
||||
!!$! = r0 = b-ax0
|
||||
!!$! =
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),' restart: ',itx,it
|
||||
!!$ if (itx >= itmax_) exit restart
|
||||
!!$
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,r,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call prec%apply(r,desc_a,info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,rt0,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zone,r,zzero,rh(:,0),desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_geaxpby(zzero,r,zzero,uh(:,0),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ rho = zone
|
||||
!!$ alpha = zzero
|
||||
!!$ omega = zone
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b)
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ iteration: do
|
||||
!!$ it = it + nl
|
||||
!!$ itx = itx + nl
|
||||
!!$ rho = -omega*rho
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' iteration: ',itx, rho,rh(1,0)
|
||||
!!$
|
||||
!!$ do j = 0, nl -1
|
||||
!!$ If (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),'bicg part: ',j, nl
|
||||
!!$
|
||||
!!$ rho_old = rho
|
||||
!!$ rho = psb_gedot(rh(:,j),rt0,desc_a,info)
|
||||
!!$ if (rho == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown r',rho
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ beta = alpha*rho/rho_old
|
||||
!!$ rho_old = rho
|
||||
!!$ call psb_geaxpby(zone,rh(:,0:j),-beta,uh(:,0:j),desc_a,info)
|
||||
!!$ call psb_spmm(zone,a,uh(:,j),zzero,uh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(uh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ gamma(j) = psb_gedot(uh(:,j+1),rt0,desc_a,info)
|
||||
!!$
|
||||
!!$ if (gamma(j) == zzero) then
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bi-cgstab iteration breakdown s2',gamma(j)
|
||||
!!$ exit iteration
|
||||
!!$ endif
|
||||
!!$ alpha = rho/gamma(j)
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' bicg part: alpha=r/g ',alpha,rho,gamma(j)
|
||||
!!$
|
||||
!!$ call psb_geaxpby(-alpha,uh(:,1:j+1),zone,rh(:,0:j),desc_a,info)
|
||||
!!$ call psb_geaxpby(alpha,uh(:,0),zone,x,desc_a,info)
|
||||
!!$ call psb_spmm(zone,a,rh(:,j),zzero,rh(:,j+1),desc_a,info,work=aux)
|
||||
!!$
|
||||
!!$ call prec%apply(rh(:,j+1),desc_a,info)
|
||||
!!$
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1, nl
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' mod g-s part: ',j, nl,rh(1,0)
|
||||
!!$
|
||||
!!$ do i=1, j-1
|
||||
!!$ taum(i,j) = psb_gedot(rh(:,i),rh(:,j),desc_a,info)
|
||||
!!$ taum(i,j) = taum(i,j)/sigma(i)
|
||||
!!$ call psb_geaxpby(-taum(i,j),rh(:,i),zone,rh(:,j),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$ sigma(j) = psb_gedot(rh(:,j),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = psb_gedot(rh(:,0),rh(:,j),desc_a,info)
|
||||
!!$ gamma1(j) = gamma1(j)/sigma(j)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ gamma(nl) = gamma1(nl)
|
||||
!!$ omega = gamma(nl)
|
||||
!!$
|
||||
!!$ do j=nl-1,1,-1
|
||||
!!$ gamma(j) = gamma1(j)
|
||||
!!$ do i=j+1,nl
|
||||
!!$ gamma(j) = gamma(j) - taum(j,i) * gamma(i)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ do j=1,nl-1
|
||||
!!$ gamma2(j) = gamma(j+1)
|
||||
!!$ do i=j+1,nl-1
|
||||
!!$ gamma2(j) = gamma2(j) + taum(j,i) * gamma(i+1)
|
||||
!!$ enddo
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ call psb_geaxpby(gamma(1),rh(:,0),zone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(nl),rh(:,nl),zone,rh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma(nl),uh(:,nl),zone,uh(:,0),desc_a,info)
|
||||
!!$
|
||||
!!$ do j=1, nl-1
|
||||
!!$ call psb_geaxpby(-gamma(j),uh(:,j),zone,uh(:,0),desc_a,info)
|
||||
!!$ call psb_geaxpby(gamma2(j),rh(:,j),zone,x,desc_a,info)
|
||||
!!$ call psb_geaxpby(-gamma1(j),rh(:,j),zone,rh(:,0),desc_a,info)
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ if (psb_check_conv(methdname,itx,x,rh(:,0),desc_a,stopdat,info)) exit restart
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ call psb_errpush(psb_err_from_subroutine_non_,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ end do iteration
|
||||
!!$ end do restart
|
||||
!!$
|
||||
!!$ call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ deallocate(aux,stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(wwrk,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(uh,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(rh,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_zcgstabl
|
||||
!!$
|
||||
|
||||
|
||||
Subroutine psb_zcgstabl_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
use psb_base_mod
|
||||
|
||||
+45
-211
@@ -33,217 +33,51 @@
|
||||
! File: psb_krylov_mod.f90
|
||||
! Interfaces for Krylov subspace iterative methods.
|
||||
!
|
||||
|
||||
!
|
||||
! Subroutine: psb_zkrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, complexversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_zspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_zprec_type) Input: preconditioner
|
||||
! b - complex,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - complex,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
!!$Subroutine psb_zkrylov(method,a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod,only : psb_sprec_type, psb_dprec_type, psb_zprec_type, psb_zprec_type
|
||||
!!$ use psb_krylov_mod, psb_protect_name => psb_zkrylov
|
||||
!!$ character(len=*) :: method
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ interface
|
||||
!!$ subroutine psb_zcg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ type(psb_zspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_zcg
|
||||
!!$ subroutine psb_zbicg(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ type(psb_zspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_zbicg
|
||||
!!$ subroutine psb_zcgstab(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ type(psb_zspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_zcgstab
|
||||
!!$ Subroutine psb_zcgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_zcgstabl
|
||||
!!$ Subroutine psb_zrgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$ end subroutine psb_zrgmres
|
||||
!!$ subroutine psb_zcgs(a,prec,b,x,eps,&
|
||||
!!$ & desc_a,info,itmax,iter,err,itrace,istop)
|
||||
!!$ import :: psb_ipk_, psb_dpk_, psb_desc_type, &
|
||||
!!$ & psb_zspmat_type, psb_zprec_type
|
||||
!!$ type(psb_zspmat_type), intent(in) :: a
|
||||
!!$ type(psb_desc_type), intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), intent(inout) :: x(:)
|
||||
!!$ real(psb_dpk_), intent(in) :: eps
|
||||
!!$ class(psb_zprec_type), intent(in) :: prec
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), optional, intent(in) :: itmax, itrace,istop
|
||||
!!$ integer(psb_ipk_), optional, intent(out) :: iter
|
||||
!!$ real(psb_dpk_), optional, intent(out) :: err
|
||||
!!$ end subroutine psb_zcgs
|
||||
!!$ end interface
|
||||
!!$
|
||||
!!$
|
||||
!!$ integer(psb_ipk_) :: ictxt,me,np,err_act
|
||||
!!$ character(len=20) :: name
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_krylov'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$
|
||||
!!$
|
||||
!!$ ictxt=desc_a%get_context()
|
||||
!!$
|
||||
!!$ call psb_info(ictxt, me, np)
|
||||
!!$
|
||||
!!$
|
||||
!!$ select case(psb_toupper(method))
|
||||
!!$ case('CG')
|
||||
!!$ call psb_zcg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('CGS')
|
||||
!!$ call psb_zcgs(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICG')
|
||||
!!$ call psb_zbicg(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ case('BICGSTAB')
|
||||
!!$ call psb_zcgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,istop)
|
||||
!!$ case('RGMRES')
|
||||
!!$ call psb_zrgmres(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ & itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case('BICGSTABL')
|
||||
!!$ call psb_zcgstabl(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,irst,istop)
|
||||
!!$ case default
|
||||
!!$ if (me == 0) write(psb_err_unit,*) trim(name),': Warning: Unknown method ',method,&
|
||||
!!$ & ', defaulting to BiCGSTAB'
|
||||
!!$ call psb_zcgstab(a,prec,b,x,eps,desc_a,info,&
|
||||
!!$ &itmax,iter,err,itrace,istop)
|
||||
!!$ end select
|
||||
!!$
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error(ictxt)
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$end subroutine psb_zkrylov
|
||||
|
||||
!
|
||||
! Subroutine: psb_zkrylov
|
||||
!
|
||||
! Front-end for the Krylov subspace iterations, complexversion
|
||||
!
|
||||
! Arguments:
|
||||
!
|
||||
! methd - character The specific method; can take the values:
|
||||
! CG
|
||||
! CGS
|
||||
! BICG
|
||||
! BICGSTAB
|
||||
! BICGSTABL
|
||||
! RGMRES
|
||||
!
|
||||
! a - type(psb_zspmat_type) Input: sparse matrix containing A.
|
||||
! prec - class(psb_zprec_type) Input: preconditioner
|
||||
! b - complex,dimension(:) Input: vector containing the
|
||||
! right hand side B
|
||||
! x - complex,dimension(:) Input/Output: vector containing the
|
||||
! initial guess and final solution X.
|
||||
! eps - real Input: Stopping tolerance; the iteration is
|
||||
! stopped when the error
|
||||
! estimate |err| <= eps
|
||||
!
|
||||
! desc_a - type(psb_desc_type). Input: The communication descriptor.
|
||||
! info - integer. Output: Return code
|
||||
!
|
||||
! itmax - integer(optional) Input: maximum number of iterations to be
|
||||
! performed.
|
||||
! iter - integer(optional) Output: how many iterations have been
|
||||
! performed.
|
||||
! err - real (optional) Output: error estimate on exit
|
||||
! itrace - integer(optional) Input: print an informational message
|
||||
! with the error estimate every itrace
|
||||
! iterations
|
||||
! irst - integer(optional) Input: restart parameter for RGMRES and
|
||||
! BICGSTAB(L) methods
|
||||
! istop - integer(optional) Input: stopping criterion, or how
|
||||
! to estimate the error.
|
||||
! 1: err = |r|/(|a||x|+|b|)
|
||||
! 2: err = |r|/|b|
|
||||
! where r is the (preconditioned, recursive
|
||||
! estimate of) residual
|
||||
!
|
||||
Subroutine psb_zkrylov_vect(method,a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop,cond)
|
||||
|
||||
|
||||
+2
-365
@@ -105,369 +105,6 @@
|
||||
! estimate of) residual.
|
||||
! irst - integer(optional) Input: restart parameter
|
||||
!
|
||||
!!$Subroutine psb_zrgmres(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
|
||||
!!$ use psb_base_mod
|
||||
!!$ use psb_prec_mod
|
||||
!!$ use psb_z_krylov_conv_mod
|
||||
!!$ use psb_krylov_mod
|
||||
!!$ implicit none
|
||||
!!$
|
||||
!!$! = Parameters
|
||||
!!$ Type(psb_zspmat_type), Intent(in) :: a
|
||||
!!$ class(psb_zprec_type), Intent(in) :: prec
|
||||
!!$ Type(psb_desc_type), Intent(in) :: desc_a
|
||||
!!$ complex(psb_dpk_), Intent(in) :: b(:)
|
||||
!!$ complex(psb_dpk_), Intent(inout) :: x(:)
|
||||
!!$ Real(psb_dpk_), Intent(in) :: eps
|
||||
!!$ integer(psb_ipk_), intent(out) :: info
|
||||
!!$ integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst,istop
|
||||
!!$ integer(psb_ipk_), Optional, Intent(out) :: iter
|
||||
!!$ Real(psb_dpk_), Optional, Intent(out) :: err
|
||||
!!$! = local data
|
||||
!!$ complex(psb_dpk_), allocatable, target :: aux(:),w(:),w1(:), v(:,:)
|
||||
!!$ complex(psb_dpk_), allocatable :: c(:),s(:), h(:,:), rs(:),rst(:),xt(:)
|
||||
!!$ Real(psb_dpk_) :: tmp
|
||||
!!$ complex(psb_dpk_) :: rti, rti1, scal
|
||||
!!$ integer(psb_ipk_) ::litmax, naux, mglob, it,k, itrace_,&
|
||||
!!$ & np,me, n_row, n_col, nl, int_err(5)
|
||||
!!$ Logical, Parameter :: exchange=.True., noexchange=.False.
|
||||
!!$ integer(psb_ipk_), Parameter :: irmax = 8
|
||||
!!$ integer(psb_ipk_) :: itx, i, isvch, ictxt,istop_, err_act
|
||||
!!$ integer(psb_ipk_) :: debug_level, debug_unit
|
||||
!!$ Real(psb_dpk_) :: rni, xni, bni, ani,bn2
|
||||
!!$ real(psb_dpk_) :: errnum, errden, deps, derr
|
||||
!!$ character(len=20) :: name
|
||||
!!$ character(len=*), parameter :: methdname='RGMRES'
|
||||
!!$
|
||||
!!$ info = psb_success_
|
||||
!!$ name = 'psb_zgmres'
|
||||
!!$ call psb_erractionsave(err_act)
|
||||
!!$ debug_unit = psb_get_debug_unit()
|
||||
!!$ debug_level = psb_get_debug_level()
|
||||
!!$
|
||||
!!$ ictxt = desc_a%get_context()
|
||||
!!$ Call psb_info(ictxt, me, np)
|
||||
!!$ if (debug_level >= psb_debug_ext_)&
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),': from psb_info',np
|
||||
!!$
|
||||
!!$ mglob = desc_a%get_global_rows()
|
||||
!!$ n_row = desc_a%get_local_rows()
|
||||
!!$ n_col = desc_a%get_local_cols()
|
||||
!!$
|
||||
!!$ if (present(istop)) then
|
||||
!!$ istop_ = istop
|
||||
!!$ else
|
||||
!!$ istop_ = 2
|
||||
!!$ endif
|
||||
!!$ !
|
||||
!!$ ! ISTOP_ = 1: Normwise backward error, infinity norm
|
||||
!!$ ! ISTOP_ = 2: ||r||/||b||, 2-norm
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=istop_
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itmax)) then
|
||||
!!$ litmax = itmax
|
||||
!!$ else
|
||||
!!$ litmax = 1000
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ if (present(itrace)) then
|
||||
!!$ itrace_ = itrace
|
||||
!!$ else
|
||||
!!$ itrace_ = 0
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (present(irst)) then
|
||||
!!$ nl = irst
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' present: irst: ',irst,nl
|
||||
!!$ else
|
||||
!!$ nl = 10
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' not present: irst: ',irst,nl
|
||||
!!$ endif
|
||||
!!$ if (nl <=0 ) then
|
||||
!!$ info=psb_err_invalid_istop_
|
||||
!!$ int_err(1)=nl
|
||||
!!$ err=info
|
||||
!!$ call psb_errpush(info,name,i_err=int_err)
|
||||
!!$ goto 9999
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ call psb_chkvect(mglob,ione,size(x,1),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on X')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ call psb_chkvect(mglob,ione,size(b,ione),ione,ione,desc_a,info)
|
||||
!!$ if(info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_
|
||||
!!$ call psb_errpush(info,name,a_err='psb_chkvect on B')
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ naux=4*n_col
|
||||
!!$ allocate(aux(naux),h(nl+1,nl+1),&
|
||||
!!$ &c(nl+1),s(nl+1),rs(nl+1), rst(nl+1),stat=info)
|
||||
!!$
|
||||
!!$ if (info == psb_success_) Call psb_geall(v,desc_a,info,n=nl+1)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geall(xt,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) Call psb_geasb(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Size of V,W,W1 ',size(v),size(v,1),&
|
||||
!!$ & size(w),size(w,1),size(w1),size(w1,1), size(v(:,1))
|
||||
!!$
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ ani = psb_spnrmi(a,desc_a,info)
|
||||
!!$ bni = psb_geamax(b,desc_a,info)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ bn2 = psb_genrm2(b,desc_a,info)
|
||||
!!$ endif
|
||||
!!$ errnum = dzero
|
||||
!!$ errden = done
|
||||
!!$ deps = eps
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ if ((itrace_ > 0).and.(me == 0)) call log_header(methdname)
|
||||
!!$
|
||||
!!$ itx = 0
|
||||
!!$ restart: do
|
||||
!!$
|
||||
!!$ ! compute r0 = b-ax0
|
||||
!!$ ! check convergence
|
||||
!!$ ! compute v1 = r0/||r0||_2
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' restart: ',itx,it
|
||||
!!$ it = 0
|
||||
!!$ call psb_geaxpby(zone,b,zzero,v(:,1),desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_spmm(-zone,a,x,zone,v(:,1),desc_a,info,work=aux)
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ End If
|
||||
!!$
|
||||
!!$ rs(1) = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ rs(2:) = zzero
|
||||
!!$ if (info /= psb_success_) Then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$ scal=done/rs(1) ! rs(1) MIGHT BE VERY SMALL - USE DSCAL TO DEAL WITH IT?
|
||||
!!$
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' on entry to amax: b: ',Size(b),rs(1),scal
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! check convergence
|
||||
!!$ !
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ rni = psb_geamax(v(:,1),desc_a,info)
|
||||
!!$ xni = psb_geamax(x,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ rni = psb_genrm2(v(:,1),desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (errnum <= deps*errden) exit restart
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ v(:,1) = v(:,1) * scal
|
||||
!!$
|
||||
!!$ if (itx >= litmax) exit restart
|
||||
!!$
|
||||
!!$ !
|
||||
!!$ ! inner iterations
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ inner: Do i=1,nl
|
||||
!!$ itx = itx + 1
|
||||
!!$
|
||||
!!$ call prec%apply(v(:,i),w1,desc_a,info)
|
||||
!!$ Call psb_spmm(zone,a,w1,zzero,w,desc_a,info,work=aux)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ do k = 1, i
|
||||
!!$ h(k,i) = psb_gedot(v(:,k),w,desc_a,info)
|
||||
!!$ call psb_geaxpby(-h(k,i),v(:,k),zone,w,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ h(i+1,i) = psb_genrm2(w,desc_a,info)
|
||||
!!$ scal=done/h(i+1,i)
|
||||
!!$ call psb_geaxpby(scal,w,zzero,v(:,i+1),desc_a,info)
|
||||
!!$ do k=2,i
|
||||
!!$ call zrot(1,h(k-1,i),1,h(k,i),1,real(c(k-1)),s(k-1))
|
||||
!!$ enddo
|
||||
!!$
|
||||
!!$ rti = h(i,i)
|
||||
!!$ rti1 = h(i+1,i)
|
||||
!!$ call zrotg(rti,rti1,tmp,s(i))
|
||||
!!$ c(i) = cmplx(tmp,szero)
|
||||
!!$ call zrot(1,h(i,i),1,h(i+1,i),1,real(c(i)),s(i))
|
||||
!!$ h(i+1,i) = zzero
|
||||
!!$ call zrot(1,rs(i),1,rs(i+1),1,real(c(i)),s(i))
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ !
|
||||
!!$ ! build x and then compute the residual and its infinity norm
|
||||
!!$ !
|
||||
!!$ rst = rs
|
||||
!!$ xt = zzero
|
||||
!!$ call ztrsm('l','u','n','n',i,1,zone,h,size(h,1),rst,size(rst,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rst(1:nl)
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rst(k),v(:,k),zone,xt,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,x,zone,xt,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,b,zzero,w1,desc_a,info)
|
||||
!!$ call psb_spmm(-zone,a,xt,zone,w1,desc_a,info,work=aux)
|
||||
!!$ rni = psb_geamax(w1,desc_a,info)
|
||||
!!$ xni = psb_geamax(xt,desc_a,info)
|
||||
!!$ errnum = rni
|
||||
!!$ errden = (ani*xni+bni)
|
||||
!!$ !
|
||||
!!$
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! compute the residual 2-norm as byproduct of the solution
|
||||
!!$ ! procedure of the least-squares problem
|
||||
!!$ !
|
||||
!!$ rni = abs(rs(i+1))
|
||||
!!$ errnum = rni
|
||||
!!$ errden = bn2
|
||||
!!$ endif
|
||||
!!$
|
||||
!!$ If (errnum <= deps*errden) Then
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call ztrsm('l','u','n','n',i,1,zone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = zzero
|
||||
!!$ do k=1, i
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),zone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,w,zone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ exit restart
|
||||
!!$
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ end do inner
|
||||
!!$
|
||||
!!$ if (istop_ == 1) then
|
||||
!!$ x = xt
|
||||
!!$ else if (istop_ == 2) then
|
||||
!!$ !
|
||||
!!$ ! build x
|
||||
!!$ !
|
||||
!!$ call ztrsm('l','u','n','n',nl,1,zone,h,size(h,1),rs,size(rs,1))
|
||||
!!$ if (debug_level >= psb_debug_ext_) &
|
||||
!!$ & write(debug_unit,*) me,' ',trim(name),&
|
||||
!!$ & ' Rebuild x-> RS:',rs(1:nl)
|
||||
!!$ w1 = zzero
|
||||
!!$ do k=1, nl
|
||||
!!$ call psb_geaxpby(rs(k),v(:,k),zone,w1,desc_a,info)
|
||||
!!$ end do
|
||||
!!$ call prec%apply(w1,w,desc_a,info)
|
||||
!!$ call psb_geaxpby(zone,w,zone,x,desc_a,info)
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ end do restart
|
||||
!!$ if (itrace_ > 0) &
|
||||
!!$ & call log_conv(methdname,me,itx,ione,errnum,errden,deps)
|
||||
!!$
|
||||
!!$ call log_end(methdname,me,itx,errnum,errden,deps,err=derr,iter=iter)
|
||||
!!$
|
||||
!!$ if (present(err)) then
|
||||
!!$ err = derr
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$
|
||||
!!$ deallocate(aux,h,c,s,rs,rst, stat=info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(v,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(w1,desc_a,info)
|
||||
!!$ if (info == psb_success_) call psb_gefree(xt,desc_a,info)
|
||||
!!$ if (info /= psb_success_) then
|
||||
!!$ info=psb_err_from_subroutine_non_
|
||||
!!$ call psb_errpush(info,name)
|
||||
!!$ goto 9999
|
||||
!!$ end if
|
||||
!!$
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ return
|
||||
!!$
|
||||
!!$9999 continue
|
||||
!!$ call psb_erractionrestore(err_act)
|
||||
!!$ if (err_act == psb_act_abort_) then
|
||||
!!$ call psb_error()
|
||||
!!$ return
|
||||
!!$ end if
|
||||
!!$ return
|
||||
!!$
|
||||
!!$End Subroutine psb_zrgmres
|
||||
|
||||
|
||||
|
||||
subroutine psb_zrgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
& itmax,iter,err,itrace,irst,istop)
|
||||
@@ -738,7 +375,7 @@ subroutine psb_zrgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call ztrsm('l','u','n','n',i,1,zone,h,size(h,1),rst,size(rst,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rst(1:nl)
|
||||
& ' Rebuild x-> RS:',rst(1:i)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rst(k),v(k),zone,xt,desc_a,info)
|
||||
end do
|
||||
@@ -774,7 +411,7 @@ subroutine psb_zrgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
||||
call ztrsm('l','u','n','n',i,1,zone,h,size(h,1),rs,size(rs,1))
|
||||
if (debug_level >= psb_debug_ext_) &
|
||||
& write(debug_unit,*) me,' ',trim(name),&
|
||||
& ' Rebuild x-> RS:',rs(1:nl)
|
||||
& ' Rebuild x-> RS:',rs(1:i)
|
||||
call w1%set(zzero)
|
||||
do k=1, i
|
||||
call psb_geaxpby(rs(k),v(k),zone,w1,desc_a,info)
|
||||
|
||||
Reference in New Issue
Block a user