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@ -105,369 +105,6 @@
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! estimate of) residual.
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! irst - integer(optional) Input: restart parameter
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!
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!!$Subroutine psb_crgmres(a,prec,b,x,eps,desc_a,info,itmax,iter,err,itrace,irst,istop)
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!!$ 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, irst,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(:),w(:),w1(:), v(:,:)
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!!$ complex(psb_spk_), allocatable :: c(:),s(:), h(:,:), rs(:),rst(:),xt(:)
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!!$ Real(psb_spk_) :: tmp
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!!$ complex(psb_spk_) :: rti, rti1, scal
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!!$ integer(psb_ipk_) ::litmax, naux, mglob, it,k, itrace_,&
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!!$ & np,me, n_row, n_col, nl, int_err(5)
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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, i, isvch, ictxt,istop_, err_act
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!!$ integer(psb_ipk_) :: debug_level, debug_unit
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!!$ Real(psb_dpk_) :: rni, xni, bni, ani,bn2
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!!$ real(psb_dpk_) :: errnum, errden, deps, derr
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!!$ character(len=20) :: name
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!!$ character(len=*), parameter :: methdname='RGMRES'
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!!$
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!!$ info = psb_success_
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!!$ name = 'psb_cgmres'
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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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!!$ 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||, 2-norm
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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(1)=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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!!$ if (present(itmax)) then
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!!$ litmax = itmax
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!!$ else
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!!$ litmax = 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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!!$ if (present(irst)) then
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!!$ nl = irst
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' present: irst: ',irst,nl
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!!$ else
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!!$ nl = 10
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' not present: irst: ',irst,nl
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!!$ endif
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!!$ if (nl <=0 ) then
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!!$ info=psb_err_invalid_istop_
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!!$ int_err(1)=nl
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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,1),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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!!$ allocate(aux(naux),h(nl+1,nl+1),&
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!!$ &c(nl+1),s(nl+1),rs(nl+1), rst(nl+1),stat=info)
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!!$
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!!$ if (info == psb_success_) Call psb_geall(v,desc_a,info,n=nl+1)
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!!$ if (info == psb_success_) Call psb_geall(w,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geall(w1,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geall(xt,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geasb(v,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geasb(w,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geasb(w1,desc_a,info)
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!!$ if (info == psb_success_) Call psb_geasb(xt,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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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' Size of V,W,W1 ',size(v),size(v,1),&
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!!$ & size(w),size(w,1),size(w1),size(w1,1), size(v(:,1))
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!!$
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!!$
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!!$ if (istop_ == 1) then
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!!$ ani = psb_spnrmi(a,desc_a,info)
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!!$ bni = psb_geamax(b,desc_a,info)
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!!$ else if (istop_ == 2) then
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!!$ bn2 = psb_genrm2(b,desc_a,info)
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!!$ endif
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!!$ errnum = dzero
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!!$ errden = done
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!!$ deps = eps
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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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!!$ if ((itrace_ > 0).and.(me == 0)) call log_header(methdname)
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!!$
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!!$ itx = 0
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!!$ restart: do
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!!$
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!!$ ! compute r0 = b-ax0
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!!$ ! check convergence
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!!$ ! compute v1 = r0/||r0||_2
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!!$
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' restart: ',itx,it
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!!$ it = 0
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!!$ call psb_geaxpby(cone,b,czero,v(:,1),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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!!$ call psb_spmm(-cone,a,x,cone,v(:,1),desc_a,info,work=aux)
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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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!!$ rs(1) = psb_genrm2(v(:,1),desc_a,info)
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!!$ rs(2:) = czero
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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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!!$ scal=done/rs(1) ! rs(1) MIGHT BE VERY SMALL - USE DSCAL TO DEAL WITH IT?
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!!$
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' on entry to amax: b: ',Size(b),rs(1),scal
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!!$
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!!$ !
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!!$ ! check convergence
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!!$ !
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!!$ if (istop_ == 1) then
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!!$ rni = psb_geamax(v(:,1),desc_a,info)
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!!$ xni = psb_geamax(x,desc_a,info)
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!!$ errnum = rni
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!!$ errden = (ani*xni+bni)
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!!$ else if (istop_ == 2) then
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!!$ rni = psb_genrm2(v(:,1),desc_a,info)
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!!$ errnum = rni
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!!$ errden = bn2
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!!$ endif
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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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!!$ if (errnum <= deps*errden) exit restart
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!!$
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!!$ if (itrace_ > 0) &
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!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
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!!$
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!!$ v(:,1) = v(:,1) * scal
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!!$
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!!$ if (itx >= litmax) exit restart
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!!$
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!!$ !
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!!$ ! inner iterations
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!!$ !
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!!$
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!!$ inner: Do i=1,nl
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!!$ itx = itx + 1
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!!$
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!!$ call prec%apply(v(:,i),w1,desc_a,info)
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!!$ Call psb_spmm(cone,a,w1,czero,w,desc_a,info,work=aux)
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!!$ !
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!!$
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!!$ do k = 1, i
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!!$ h(k,i) = psb_gedot(v(:,k),w,desc_a,info)
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!!$ call psb_geaxpby(-h(k,i),v(:,k),cone,w,desc_a,info)
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!!$ end do
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!!$ h(i+1,i) = psb_genrm2(w,desc_a,info)
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!!$ scal=done/h(i+1,i)
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!!$ call psb_geaxpby(scal,w,czero,v(:,i+1),desc_a,info)
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!!$ do k=2,i
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!!$ call crot(1,h(k-1,i),1,h(k,i),1,real(c(k-1)),s(k-1))
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!!$ enddo
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!!$
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!!$ rti = h(i,i)
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!!$ rti1 = h(i+1,i)
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!!$ call crotg(rti,rti1,tmp,s(i))
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!!$ c(i) = cmplx(tmp,szero)
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!!$ call crot(1,h(i,i),1,h(i+1,i),1,real(c(i)),s(i))
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!!$ h(i+1,i) = czero
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!!$ call crot(1,rs(i),1,rs(i+1),1,real(c(i)),s(i))
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!!$
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!!$ if (istop_ == 1) then
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!!$ !
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!!$ ! build x and then compute the residual and its infinity norm
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!!$ !
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!!$ rst = rs
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!!$ xt = czero
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!!$ call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rst,size(rst,1))
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' Rebuild x-> RS:',rst(1:nl)
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!!$ do k=1, i
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!!$ call psb_geaxpby(rst(k),v(:,k),cone,xt,desc_a,info)
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!!$ end do
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!!$ call prec%apply(xt,desc_a,info)
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!!$ call psb_geaxpby(cone,x,cone,xt,desc_a,info)
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!!$ call psb_geaxpby(cone,b,czero,w1,desc_a,info)
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!!$ call psb_spmm(-cone,a,xt,cone,w1,desc_a,info,work=aux)
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!!$ rni = psb_geamax(w1,desc_a,info)
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!!$ xni = psb_geamax(xt,desc_a,info)
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!!$ errnum = rni
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!!$ errden = (ani*xni+bni)
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!!$ !
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!!$
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!!$ else if (istop_ == 2) then
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!!$ !
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!!$ ! compute the residual 2-norm as byproduct of the solution
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!!$ ! procedure of the least-squares problem
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!!$ !
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!!$ rni = abs(rs(i+1))
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!!$ errnum = rni
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!!$ errden = bn2
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!!$ endif
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!!$
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!!$ If (errnum <= deps*errden) Then
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!!$
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!!$ if (istop_ == 1) then
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!!$ x = xt
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!!$ else if (istop_ == 2) then
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!!$ !
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!!$ ! build x
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!!$ !
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!!$ call ctrsm('l','u','n','n',i,1,cone,h,size(h,1),rs,size(rs,1))
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' Rebuild x-> RS:',rs(1:nl)
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!!$ w1 = czero
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!!$ do k=1, i
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!!$ call psb_geaxpby(rs(k),v(:,k),cone,w1,desc_a,info)
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!!$ end do
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!!$ call prec%apply(w1,w,desc_a,info)
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!!$ call psb_geaxpby(cone,w,cone,x,desc_a,info)
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!!$ end if
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!!$
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!!$ exit restart
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!!$
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!!$ end if
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!!$
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!!$ if (itrace_ > 0) &
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!!$ & call log_conv(methdname,me,itx,itrace_,errnum,errden,deps)
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!!$
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!!$ end do inner
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!!$
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!!$ if (istop_ == 1) then
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!!$ x = xt
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!!$ else if (istop_ == 2) then
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!!$ !
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!!$ ! build x
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!!$ !
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!!$ call ctrsm('l','u','n','n',nl,1,cone,h,size(h,1),rs,size(rs,1))
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!!$ if (debug_level >= psb_debug_ext_) &
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!!$ & write(debug_unit,*) me,' ',trim(name),&
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!!$ & ' Rebuild x-> RS:',rs(1:nl)
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!!$ w1 = czero
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!!$ do k=1, nl
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!!$ call psb_geaxpby(rs(k),v(:,k),cone,w1,desc_a,info)
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!!$ end do
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!!$ call prec%apply(w1,w,desc_a,info)
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!!$ call psb_geaxpby(cone,w,cone,x,desc_a,info)
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!!$ end if
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!!$
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!!$ end do restart
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!!$ if (itrace_ > 0) &
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!!$ & call log_conv(methdname,me,itx,ione,errnum,errden,deps)
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!!$
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!!$ call log_end(methdname,me,itx,errnum,errden,deps,err=derr,iter=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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!!$
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!!$ deallocate(aux,h,c,s,rs,rst, stat=info)
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!!$ if (info == psb_success_) call psb_gefree(v,desc_a,info)
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!!$ if (info == psb_success_) call psb_gefree(w,desc_a,info)
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!!$ if (info == psb_success_) call psb_gefree(w1,desc_a,info)
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!!$ if (info == psb_success_) call psb_gefree(xt,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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!!$ 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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|
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|
!!$End Subroutine psb_crgmres
|
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|
subroutine psb_crgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
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|
|
& itmax,iter,err,itrace,irst,istop)
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|
|
@ -738,7 +375,7 @@ subroutine psb_crgmres_vect(a,prec,b,x,eps,desc_a,info,&
|
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|
|
|
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)
|
|
|
|
|
|
Salvatore Filippone
13 years ago