|
|
|
|
!
|
|
|
|
|
!
|
|
|
|
|
! AMG4PSBLAS version 1.0
|
|
|
|
|
! Algebraic Multigrid Package
|
|
|
|
|
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
|
|
|
|
|
!
|
|
|
|
|
! (C) Copyright 2021
|
|
|
|
|
!
|
|
|
|
|
! 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_d_bwgs_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
|
|
|
|
|
|
|
|
|
|
use psb_base_mod
|
|
|
|
|
use amg_d_gs_solver, amg_protect_name => amg_d_bwgs_solver_bld
|
|
|
|
|
|
|
|
|
|
Implicit None
|
|
|
|
|
|
|
|
|
|
! Arguments
|
|
|
|
|
type(psb_dspmat_type), intent(in), target :: a
|
|
|
|
|
Type(psb_desc_type), Intent(inout) :: desc_a
|
|
|
|
|
class(amg_d_bwgs_solver_type), intent(inout) :: sv
|
|
|
|
|
integer(psb_ipk_), intent(out) :: info
|
|
|
|
|
type(psb_dspmat_type), intent(in), target, optional :: b
|
|
|
|
|
class(psb_d_base_sparse_mat), intent(in), optional :: amold
|
|
|
|
|
class(psb_d_base_vect_type), intent(in), optional :: vmold
|
|
|
|
|
class(psb_i_base_vect_type), intent(in), optional :: imold
|
|
|
|
|
! Local variables
|
|
|
|
|
integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
|
|
|
|
|
type(psb_ctxt_type) :: ctxt
|
|
|
|
|
integer(psb_ipk_) :: np, me, i, err_act, debug_unit, debug_level
|
|
|
|
|
character(len=20) :: name='d_bwgs_solver_bld', ch_err
|
|
|
|
|
integer(psb_ipk_), save :: idx_tril=-1
|
|
|
|
|
logical, parameter :: do_timings=.true.
|
|
|
|
|
|
|
|
|
|
info=psb_success_
|
|
|
|
|
call psb_erractionsave(err_act)
|
|
|
|
|
debug_unit = psb_get_debug_unit()
|
|
|
|
|
debug_level = psb_get_debug_level()
|
|
|
|
|
ctxt = desc_a%get_context()
|
|
|
|
|
call psb_info(ctxt, me, np)
|
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
|
|
|
& write(debug_unit,*) me,' ',trim(name),' start'
|
|
|
|
|
if ((do_timings).and.(idx_tril==-1)) &
|
|
|
|
|
& idx_tril = psb_get_timer_idx("BWGS_BLD: tril")
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
n_row = desc_a%get_local_rows()
|
|
|
|
|
|
|
|
|
|
nrow_a = a%get_nrows()
|
|
|
|
|
nztota = a%get_nzeros()
|
|
|
|
|
|
|
|
|
|
if (sv%eps <= dzero) then
|
|
|
|
|
!
|
|
|
|
|
! This cuts out the off-diagonal part, because it's supposed to
|
|
|
|
|
! be handled by the outer Jacobi smoother.
|
|
|
|
|
!
|
|
|
|
|
!write(0,*) 'Calling A%TRIL in bwgs_solver_bld'
|
|
|
|
|
if (do_timings) call psb_tic(idx_tril)
|
|
|
|
|
call a%tril(sv%l,info,diag=-ione,jmax=nrow_a,u=sv%u)
|
|
|
|
|
if (do_timings) call psb_toc(idx_tril)
|
|
|
|
|
|
|
|
|
|
else
|
|
|
|
|
|
|
|
|
|
info = psb_err_missing_override_method_
|
|
|
|
|
call psb_errpush(info,name)
|
|
|
|
|
goto 9999
|
|
|
|
|
end if
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
call sv%l%set_asb()
|
|
|
|
|
call sv%l%trim()
|
|
|
|
|
call sv%u%set_asb()
|
|
|
|
|
call sv%u%trim()
|
|
|
|
|
|
|
|
|
|
if (present(amold)) then
|
|
|
|
|
call sv%l%cscnv(info,mold=amold)
|
|
|
|
|
call sv%u%cscnv(info,mold=amold)
|
|
|
|
|
end if
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
|
|
|
& write(debug_unit,*) me,' ',trim(name),' end'
|
|
|
|
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
9999 call psb_error_handler(err_act)
|
|
|
|
|
|
|
|
|
|
return
|
|
|
|
|
end subroutine amg_d_bwgs_solver_bld
|
