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psblas3/krylov/psb_s_inner_krylov_mod.f90

340 lines
11 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
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!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 2. Redistributions in binary form must reproduce the above copyright
!!$ notice, this list of conditions, and the following disclaimer in the
!!$ documentation and/or other materials provided with the distribution.
!!$ 3. The name of the PSBLAS group or the names of its contributors may
!!$ not be used to endorse or promote products derived from this
!!$ software without specific written permission.
!!$
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
!
! File: psb_krylov_mod.f90
! Interfaces for Krylov subspace iterative methods.
!
Module psb_s_inner_krylov_mod
use psb_base_inner_krylov_mod
interface psb_init_conv
module procedure psb_s_init_conv, psb_s_init_conv_vect
end interface
interface psb_check_conv
module procedure psb_s_check_conv, psb_s_check_conv_vect
end interface
contains
subroutine psb_s_init_conv(methdname,stopc,trace,itmax,a,b,eps,desc_a,stopdat,info)
use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer, intent(in) :: stopc, trace,itmax
type(psb_sspmat_type), intent(in) :: a
real(psb_spk_), intent(in) :: b(:), eps
type(psb_desc_type), intent(in) :: desc_a
type(psb_itconv_type) :: stopdat
integer, intent(out) :: info
integer :: ictxt, me, np, err_act
character(len=20) :: name
info = psb_success_
name = 'psb_init_conv'
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
stopdat%controls(:) = 0
stopdat%values(:) = 0.0d0
stopdat%controls(psb_ik_stopc_) = stopc
stopdat%controls(psb_ik_trace_) = trace
stopdat%controls(psb_ik_itmax_) = itmax
select case(stopdat%controls(psb_ik_stopc_))
case (1)
stopdat%values(psb_ik_ani_) = psb_spnrmi(a,desc_a,info)
if (info == psb_success_) stopdat%values(psb_ik_bni_) = psb_geamax(b,desc_a,info)
case (2)
stopdat%values(psb_ik_bn2_) = psb_genrm2(b,desc_a,info)
case default
info=psb_err_invalid_istop_
call psb_errpush(info,name,i_err=(/stopc,0,0,0,0/))
goto 9999
end select
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err="Init conv check data")
goto 9999
end if
stopdat%values(psb_ik_eps_) = eps
stopdat%values(psb_ik_errnum_) = dzero
stopdat%values(psb_ik_errden_) = done
if ((stopdat%controls(psb_ik_trace_) > 0).and. (me == 0))&
& call log_header(methdname)
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_s_init_conv
function psb_s_check_conv(methdname,it,x,r,desc_a,stopdat,info) result(res)
use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer, intent(in) :: it
real(psb_spk_), intent(in) :: x(:), r(:)
type(psb_desc_type), intent(in) :: desc_a
type(psb_itconv_type) :: stopdat
logical :: res
integer, intent(out) :: info
integer :: ictxt, me, np, err_act
character(len=20) :: name
info = psb_success_
name = 'psb_check_conv'
call psb_erractionsave(err_act)
ictxt = desc_a%get_context()
call psb_info(ictxt,me,np)
res = .false.
select case(stopdat%controls(psb_ik_stopc_))
case(1)
stopdat%values(psb_ik_rni_) = psb_geamax(r,desc_a,info)
if (info == psb_success_) stopdat%values(psb_ik_xni_) = psb_geamax(x,desc_a,info)
stopdat%values(psb_ik_errnum_) = stopdat%values(psb_ik_rni_)
stopdat%values(psb_ik_errden_) = &
& (stopdat%values(psb_ik_ani_)*stopdat%values(psb_ik_xni_)&
& +stopdat%values(psb_ik_bni_))
case(2)
stopdat%values(psb_ik_rn2_) = psb_genrm2(r,desc_a,info)
stopdat%values(psb_ik_errnum_) = stopdat%values(psb_ik_rn2_)
stopdat%values(psb_ik_errden_) = stopdat%values(psb_ik_bn2_)
case default
info=psb_err_internal_error_
call psb_errpush(info,name,a_err="Control data in stopdat messed up!")
goto 9999
end select
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
if (stopdat%values(psb_ik_errden_) == dzero) then
res = (stopdat%values(psb_ik_errnum_) <= stopdat%values(psb_ik_eps_))
else
res = (stopdat%values(psb_ik_errnum_) <=&
& stopdat%values(psb_ik_eps_)*stopdat%values(psb_ik_errden_))
end if
res = (res.or.(stopdat%controls(psb_ik_itmax_) <= it))
if ( (stopdat%controls(psb_ik_trace_) > 0).and.&
& ((mod(it,stopdat%controls(psb_ik_trace_)) == 0).or.res)) then
call log_conv(methdname,me,it,1,stopdat%values(psb_ik_errnum_),&
& stopdat%values(psb_ik_errden_),stopdat%values(psb_ik_eps_))
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 function psb_s_check_conv
subroutine psb_s_init_conv_vect(methdname,stopc,trace,itmax,a,b,eps,desc_a,stopdat,info)
use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer, intent(in) :: stopc, trace,itmax
type(psb_sspmat_type), intent(in) :: a
real(psb_spk_), intent(in) :: eps
type(psb_s_vect_type), intent(inout) :: b
type(psb_desc_type), intent(in) :: desc_a
type(psb_itconv_type) :: stopdat
integer, intent(out) :: info
integer :: ictxt, me, np, err_act
character(len=20) :: name
info = psb_success_
name = 'psb_init_conv'
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
stopdat%controls(:) = 0
stopdat%values(:) = szero
stopdat%controls(psb_ik_stopc_) = stopc
stopdat%controls(psb_ik_trace_) = trace
stopdat%controls(psb_ik_itmax_) = itmax
select case(stopdat%controls(psb_ik_stopc_))
case (1)
stopdat%values(psb_ik_ani_) = psb_spnrmi(a,desc_a,info)
if (info == psb_success_)&
& stopdat%values(psb_ik_bni_) = psb_geamax(b,desc_a,info)
case (2)
stopdat%values(psb_ik_bn2_) = psb_genrm2(b,desc_a,info)
case default
info=psb_err_invalid_istop_
call psb_errpush(info,name,i_err=(/stopc,0,0,0,0/))
goto 9999
end select
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err="Init conv check data")
goto 9999
end if
stopdat%values(psb_ik_eps_) = eps
stopdat%values(psb_ik_errnum_) = szero
stopdat%values(psb_ik_errden_) = done
if ((stopdat%controls(psb_ik_trace_) > 0).and. (me == 0))&
& call log_header(methdname)
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_s_init_conv_vect
function psb_s_check_conv_vect(methdname,it,x,r,desc_a,stopdat,info) result(res)
use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer, intent(in) :: it
type(psb_s_vect_type), intent(inout) :: x, r
type(psb_desc_type), intent(in) :: desc_a
type(psb_itconv_type) :: stopdat
logical :: res
integer, intent(out) :: info
integer :: ictxt, me, np, err_act
character(len=20) :: name
info = psb_success_
res = .false.
if (psb_errstatus_fatal()) return
name = 'psb_check_conv'
call psb_erractionsave(err_act)
ictxt = desc_a%get_context()
call psb_info(ictxt,me,np)
select case(stopdat%controls(psb_ik_stopc_))
case(1)
stopdat%values(psb_ik_rni_) = psb_geamax(r,desc_a,info)
if (info == psb_success_) stopdat%values(psb_ik_xni_) = psb_geamax(x,desc_a,info)
stopdat%values(psb_ik_errnum_) = stopdat%values(psb_ik_rni_)
stopdat%values(psb_ik_errden_) = &
& (stopdat%values(psb_ik_ani_)*stopdat%values(psb_ik_xni_)&
& +stopdat%values(psb_ik_bni_))
case(2)
stopdat%values(psb_ik_rn2_) = psb_genrm2(r,desc_a,info)
stopdat%values(psb_ik_errnum_) = stopdat%values(psb_ik_rn2_)
stopdat%values(psb_ik_errden_) = stopdat%values(psb_ik_bn2_)
case default
info=psb_err_internal_error_
call psb_errpush(info,name,a_err="Control data in stopdat messed up!")
goto 9999
end select
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
if (stopdat%values(psb_ik_errden_) == dzero) then
res = (stopdat%values(psb_ik_errnum_) <= stopdat%values(psb_ik_eps_))
else
res = (stopdat%values(psb_ik_errnum_) <=&
& stopdat%values(psb_ik_eps_)*stopdat%values(psb_ik_errden_))
end if
res = (res.or.(stopdat%controls(psb_ik_itmax_) <= it))
if ( (stopdat%controls(psb_ik_trace_) > 0).and.&
& ((mod(it,stopdat%controls(psb_ik_trace_)) == 0).or.res)) then
call log_conv(methdname,me,it,1,stopdat%values(psb_ik_errnum_),&
& stopdat%values(psb_ik_errden_),stopdat%values(psb_ik_eps_))
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 function psb_s_check_conv_vect
end module psb_s_inner_krylov_mod