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psblas3/krylov/psb_base_krylov_conv_mod.f90

163 lines
6.2 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.4
!!$ (C) Copyright 2006, 2010, 2015
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
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!!$ modification, are permitted provided that the following conditions
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ 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
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!!$ software without specific written permission.
!!$
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!!$
!!$
!
! File: psb_krylov_mod.f90
! Interfaces for Krylov subspace iterative methods.
!
Module psb_base_krylov_conv_mod
use psb_const_mod
interface psb_end_conv
module procedure psb_d_end_conv
end interface
integer(psb_ipk_), parameter :: psb_ik_bni_=1, psb_ik_rni_=2, psb_ik_ani_=3
integer(psb_ipk_), parameter :: psb_ik_xni_=4, psb_ik_bn2_=5, psb_ik_xn2_=6
integer(psb_ipk_), parameter :: psb_ik_errnum_=7, psb_ik_errden_=8, psb_ik_eps_=9, psb_ik_rn2_=10
integer(psb_ipk_), parameter :: psb_ik_stopc_=1, psb_ik_trace_=2, psb_ik_itmax_=3
integer(psb_ipk_), parameter :: psb_ik_ivsz_=16
type psb_itconv_type
integer(psb_ipk_) :: controls(psb_ik_ivsz_)
real(psb_dpk_) :: values(psb_ik_ivsz_)
end type psb_itconv_type
contains
subroutine log_header(methdname)
!use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
character(len=*), parameter :: fmt='(a18,1x,a4,3(2x,a15))'
integer(psb_ipk_), parameter :: outlen=18
character(len=len(methdname)) :: mname
character(len=outlen) :: outname
mname = adjustl(trim(methdname))
write(outname,'(a)') mname(1:min(len_trim(mname),outlen-1))//':'
write(psb_out_unit,fmt) adjustl(outname),'Iteration','Error Estimate','Tolerance'
end subroutine log_header
subroutine log_conv(methdname,me,itx,itrace,errnum,errden,eps)
!use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer(psb_ipk_), intent(in) :: me, itx, itrace
real(psb_dpk_), intent(in) :: errnum, errden, eps
character(len=*), parameter :: fmt='(a18,1x,i4,3(2x,es15.9))'
integer(psb_ipk_), parameter :: outlen=18
character(len=len(methdname)) :: mname
character(len=outlen) :: outname
if ((mod(itx,itrace) == 0).and.(me == 0)) then
mname = adjustl(trim(methdname))
write(outname,'(a)') mname(1:min(len_trim(mname),outlen-1))//':'
if (errden > dzero ) then
write(psb_out_unit,fmt) adjustl(outname),itx,errnum/errden,eps
else
write(psb_out_unit,fmt) adjustl(outname),itx,errnum,eps
end if
endif
end subroutine log_conv
subroutine log_end(methdname,me,it,errnum,errden,eps,err,iter)
!use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer(psb_ipk_), intent(in) :: me, it
real(psb_dpk_), intent(in) :: errnum, errden, eps
real(psb_dpk_), optional, intent(out) :: err
integer(psb_ipk_), optional, intent(out) :: iter
character(len=*), parameter :: fmt='(a,2x,es15.9,1x,a,1x,i4,1x,a)'
character(len=*), parameter :: fmt1='(a,3(2x,es15.9))'
if (errden == dzero) then
if (errnum > eps) then
if (me == 0) then
write(psb_out_unit,fmt) trim(methdname)//' failed to converge to ',eps,&
& ' in ',it,' iterations. '
write(psb_out_unit,fmt1) 'Last iteration error estimate: ',&
& errnum
end if
end if
if (present(err)) err=errnum
else
if (errnum/errden > eps) then
if (me == 0) then
write(psb_out_unit,fmt) trim(methdname)//' failed to converge to ',eps,&
& ' in ',it,' iterations. '
write(psb_out_unit,fmt1) 'Last iteration error estimate: ',&
& errnum/errden
end if
endif
if (present(err)) err=errnum/errden
end if
if (present(iter)) iter = it
end subroutine log_end
subroutine psb_d_end_conv(methdname,it,desc_a,stopdat,info,err,iter)
use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer(psb_ipk_), intent(in) :: it
type(psb_desc_type), intent(in) :: desc_a
type(psb_itconv_type) :: stopdat
integer(psb_ipk_), intent(out) :: info
real(psb_dpk_), optional, intent(out) :: err
integer(psb_ipk_), optional, intent(out) :: iter
integer(psb_ipk_) :: ictxt, me, np, err_act
real(psb_dpk_) :: errnum, errden, eps
character(len=20) :: name
info = psb_success_
name = 'psb_end_conv'
ictxt = desc_a%get_context()
call psb_info(ictxt,me,np)
errnum = stopdat%values(psb_ik_errnum_)
errden = stopdat%values(psb_ik_errden_)
eps = stopdat%values(psb_ik_eps_)
call log_end(methdname,me,it,errnum,errden,eps,err,iter)
end subroutine psb_d_end_conv
end module psb_base_krylov_conv_mod