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.
216 lines
7.4 KiB
Fortran
216 lines
7.4 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4 version 2.0
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
|
|
!!$
|
|
!!$ (C) Copyright 2008,2009,2010
|
|
!!$
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
|
|
!!$ Pasqua D'Ambra ICAR-CNR, Naples
|
|
!!$ Daniela di Serafino Second University of Naples
|
|
!!$
|
|
!!$ 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 MLD2P4 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 MLD2P4 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: mld_dbaseprec_bld.f90
|
|
!
|
|
! Subroutine: mld_dbaseprec_bld
|
|
! Version: real
|
|
!
|
|
! This routine builds a 'base preconditioner' related to a matrix A.
|
|
! In a multilevel framework, it is called by mld_mlprec_bld to build the
|
|
! base preconditioner at each level.
|
|
!
|
|
! Details on the base preconditioner to be built are stored in the iprcparm
|
|
! field of the base preconditioner data structure (for a description of this
|
|
! data structure see mld_prec_type.f90).
|
|
!
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_dspmat_type).
|
|
! The sparse matrix structure containing the local part of the
|
|
! matrix A to be preconditioned.
|
|
! desc_a - type(psb_desc_type), input.
|
|
! The communication descriptor of a.
|
|
! p - type(mld_dbaseprec_type), input/output.
|
|
! The 'base preconditioner' data structure containing the local
|
|
! part of the preconditioner at the selected level.
|
|
! info - integer, output.
|
|
! Error code.
|
|
! upd - character, input, optional.
|
|
! If upd='F' then the base preconditioner is built from
|
|
! scratch; if upd=T' then the matrix to be preconditioned
|
|
! has the same sparsity pattern of a matrix that has been
|
|
! previously preconditioned, hence some information is reused
|
|
! in building the new preconditioner.
|
|
!
|
|
subroutine mld_dbaseprec_bld(a,desc_a,p,info,upd)
|
|
|
|
use psb_sparse_mod
|
|
use mld_inner_mod, mld_protect_name => mld_dbaseprec_bld
|
|
|
|
Implicit None
|
|
|
|
! Arguments
|
|
type(psb_d_sparse_mat), target :: a
|
|
type(psb_desc_type), intent(in), target :: desc_a
|
|
type(mld_dbaseprec_type),intent(inout) :: p
|
|
integer, intent(out) :: info
|
|
character, intent(in), optional :: upd
|
|
|
|
! Local variables
|
|
Integer :: err, n_row, n_col,ictxt, me,np,mglob, err_act
|
|
character :: iupd
|
|
integer :: debug_level, debug_unit
|
|
character(len=20) :: name, ch_err
|
|
|
|
if (psb_get_errstatus() /= 0) return
|
|
name = 'mld_dbaseprec_bld'
|
|
info=psb_success_
|
|
err=0
|
|
call psb_erractionsave(err_act)
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
ictxt = psb_cd_get_context(desc_a)
|
|
n_row = psb_cd_get_local_rows(desc_a)
|
|
n_col = psb_cd_get_local_cols(desc_a)
|
|
mglob = psb_cd_get_global_rows(desc_a)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' start'
|
|
|
|
|
|
if (present(upd)) then
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),'UPD ', upd
|
|
if ((psb_toupper(UPD) == 'F').or.(psb_toupper(UPD) == 'T')) then
|
|
IUPD=psb_toupper(UPD)
|
|
else
|
|
IUPD='F'
|
|
endif
|
|
else
|
|
IUPD='F'
|
|
endif
|
|
|
|
!
|
|
! Should add check to ensure all procs have the same...
|
|
!
|
|
|
|
call mld_check_def(p%iprcparm(mld_smoother_type_),'base_prec',&
|
|
& mld_diag_,is_legal_base_prec)
|
|
|
|
|
|
call psb_nullify_desc(p%desc_data)
|
|
|
|
select case(p%iprcparm(mld_smoother_type_))
|
|
|
|
case (mld_noprec_)
|
|
! No preconditioner
|
|
|
|
! Do nothing
|
|
call psb_cdcpy(desc_a,p%desc_data,info)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_cdcpy'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
case (mld_diag_)
|
|
! Diagonal preconditioner
|
|
|
|
call mld_diag_bld(a,desc_a,p,info)
|
|
if(debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ': out of mld_diag_bld'
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='mld_diag_bld'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
case(mld_bjac_,mld_as_)
|
|
! Additive Schwarz preconditioners/smoothers
|
|
|
|
call mld_check_def(p%iprcparm(mld_sub_ovr_),'overlap',&
|
|
& 0,is_legal_n_ovr)
|
|
call mld_check_def(p%iprcparm(mld_sub_restr_),'restriction',&
|
|
& psb_halo_,is_legal_restrict)
|
|
call mld_check_def(p%iprcparm(mld_sub_prol_),'prolongator',&
|
|
& psb_none_,is_legal_prolong)
|
|
call mld_check_def(p%iprcparm(mld_sub_ren_),'renumbering',&
|
|
& mld_renum_none_,is_legal_renum)
|
|
call mld_check_def(p%iprcparm(mld_sub_solve_),'fact',&
|
|
& mld_ilu_n_,is_legal_ml_fact)
|
|
|
|
! Set parameters for using SuperLU_dist on the local submatrices
|
|
if (p%iprcparm(mld_sub_solve_) == mld_sludist_) then
|
|
p%iprcparm(mld_sub_ovr_) = 0
|
|
p%iprcparm(mld_smoother_sweeps_) = 1
|
|
end if
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ': Calling mld_as_bld'
|
|
|
|
! Build the local part of the base preconditioner/smoother
|
|
call mld_as_bld(a,desc_a,p,iupd,info)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
call psb_errpush(info,name,a_err='mld_as_bld')
|
|
goto 9999
|
|
end if
|
|
|
|
case default
|
|
|
|
info=psb_err_internal_error_
|
|
ch_err='Unknown mld_smoother_type_'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
|
|
end select
|
|
|
|
p%iprcparm(mld_prec_status_) = mld_prec_built_
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),': Done'
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act.eq.psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
end subroutine mld_dbaseprec_bld
|
|
|