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amg4psblas/amgprec/impl/level/amg_c_base_onelev_build.f90

155 lines
5.3 KiB
Fortran

!
!
! AMG4PSBLAS version 1.0
! Algebraic Multigrid Package
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
!
! (C) Copyright 2020
!
! Salvatore Filippone
! Pasqua D'Ambra
! Fabio Durastante
!
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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.
!
!
subroutine amg_c_base_onelev_build(lv,info,amold,vmold,imold,ilv)
use psb_base_mod
use amg_c_onelev_mod, amg_protect_name => amg_c_base_onelev_build
implicit none
class(amg_c_onelev_type), target, intent(inout) :: lv
integer(psb_ipk_), intent(out) :: info
class(psb_c_base_sparse_mat), intent(in), optional :: amold
class(psb_c_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
integer(psb_ipk_), intent(in), optional :: ilv
! Local
integer(psb_ipk_) :: err,i,k, err_act
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: me, np
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name, ch_err
name = 'amg_onelev_build'
info=psb_success_
err=0
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_; goto 9999
end if
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
if (.not.associated(lv%base_desc)) then
info = psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Unassociated base DESC')
goto 9999
end if
info = psb_success_
ctxt = lv%base_desc%get_ctxt()
call psb_info(ctxt,me,np)
if (.not.allocated(lv%sm)) then
!! Error: should have called amg_dprecinit
info=3111
call psb_errpush(info,name)
goto 9999
end if
if (.not.allocated(lv%sm%sv)) then
!! Error: should have called amg_dprecinit
info=3111
call psb_errpush(info,name)
goto 9999
end if
lv%ac_nz_loc = lv%ac%get_nzeros()
lv%ac_nz_tot = lv%ac_nz_loc
select case(lv%parms%coarse_mat)
case(amg_distr_mat_)
call psb_sum(ctxt,lv%ac_nz_tot)
case(amg_repl_mat_)
! Do nothing
case default
! Should never get here
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='Wrong lv%parms')
goto 9999
end select
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Calling mlprcbld at level ',i
call amg_check_def(lv%parms%sweeps_pre,&
& 'Jacobi sweeps',izero,is_int_non_negative)
call amg_check_def(lv%parms%sweeps_post,&
& 'Jacobi sweeps',izero,is_int_non_negative)
call lv%sm%build(lv%base_a,lv%base_desc,info)
if (info == 0) then
if (allocated(lv%sm2a)) then
call lv%sm2a%build(lv%base_a,lv%base_desc,info)
lv%sm2 => lv%sm2a
else
lv%sm2 => lv%sm
end if
end if
if (info /=0 ) then
info = psb_err_internal_error_
call psb_errpush(info,name,&
& a_err='Smoother bld error')
goto 9999
end if
if (lv%sm%sv%is_global()) then
if ((lv%parms%sweeps_pre>1).or.(lv%parms%sweeps_post>1)) then
lv%parms%sweeps_pre = 1
lv%parms%sweeps_post = 1
if (me == 0) then
write(debug_unit,*)
if (present(ilv)) then
write(debug_unit,*) 'Warning: the solver "',trim(lv%sm%sv%get_fmt()),&
& '" at level ',ilv
write(debug_unit,*) ' is configured as a global solver '
else
write(debug_unit,*) 'Warning: the solver "',trim(lv%sm%sv%get_fmt()),&
& '" is configured as a global solver '
end if
write(debug_unit,*) ' Pre and post sweeps at this level reset to 1'
end if
end if
end if
if (any((/present(amold),present(vmold),present(imold)/))) &
& call lv%cnv(info,amold=amold,vmold=vmold,imold=imold)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_c_base_onelev_build