You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
psblas3/krylov/psb_base_krylov_conv_mod.f90

169 lines
6.3 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! Redistribution and use in source and binary forms, with or without
! 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
! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 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_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_r0n2_=6
integer(psb_ipk_), parameter :: psb_ik_xn2_=7, psb_ik_errnum_=8, psb_ik_errden_=9
integer(psb_ipk_), parameter :: psb_ik_eps_=10, psb_ik_rn2_=11
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,itrace,errnum,errden,eps,err,iter)
!use psb_base_mod
implicit none
character(len=*), intent(in) :: methdname
integer(psb_ipk_), intent(in) :: me, it,itrace
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 (itrace >=0) 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
end if
if (present(err)) err=errnum
else
if (errnum/errden > eps) then
if (itrace >=0) 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
end if
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, itrace
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_)
itrace = stopdat%controls(psb_ik_trace_)
call log_end(methdname,me,it,itrace,errnum,errden,eps,err,iter)
end subroutine psb_d_end_conv
end module psb_base_krylov_conv_mod