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.
286 lines
9.3 KiB
Fortran
286 lines
9.3 KiB
Fortran
!!$
|
|
!!$
|
|
!!$ MLD2P4
|
|
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
!!$ based on PSBLAS (Parallel Sparse BLAS v.2.0)
|
|
!!$
|
|
!!$ (C) Copyright 2007 Alfredo Buttari University of Rome Tor Vergata
|
|
!!$ Pasqua D'Ambra ICAR-CNR, Naples
|
|
!!$ Daniela di Serafino Second University of Naples
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$
|
|
!!$ 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_das_bld.f90
|
|
!
|
|
! Subroutine: mld_das_bld
|
|
! Version: real
|
|
!
|
|
! This routine builds Additive Schwarz (AS) preconditioners. If the AS
|
|
! preconditioner is actually the block-Jacobi one, the routine makes only a
|
|
! copy of the descriptor of the original matrix and then calls mld_fact_bld
|
|
! to perform an LU or ILU factorization of the diagonal blocks of the
|
|
! distributed matrix.
|
|
!
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_dspmat_type), input.
|
|
! The sparse matrix structure containing the local part of the
|
|
! matrix to be preconditioned.
|
|
! desc_a - type(psb_desc_type), input.
|
|
! The communication descriptor of the sparse matrix a.
|
|
! p - type(mld_dbaseprc_type), input/output.
|
|
! The 'base preconditioner' data structure containing the local
|
|
! part of the preconditioner or solver to be built.
|
|
! upd - character, input.
|
|
! If upd='F' then the 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.
|
|
! info - integer, output.
|
|
! Error code.
|
|
!
|
|
subroutine mld_das_bld(a,desc_a,p,upd,info)
|
|
|
|
use psb_base_mod
|
|
use mld_inner_mod, mld_protect_name => mld_das_bld
|
|
|
|
Implicit None
|
|
|
|
! Arguments
|
|
type(psb_dspmat_type), intent(in), target :: a
|
|
Type(psb_desc_type), Intent(in) :: desc_a
|
|
type(mld_dbaseprc_type), intent(inout) :: p
|
|
character, intent(in) :: upd
|
|
integer, intent(out) :: info
|
|
|
|
! Local variables
|
|
integer :: ptype,novr
|
|
integer :: icomm
|
|
Integer :: np,me,nnzero,ictxt, int_err(5),&
|
|
& tot_recv, n_row,n_col,nhalo, err_act, data_
|
|
type(psb_dspmat_type) :: blck
|
|
integer :: debug_level, debug_unit
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='mld_as_bld'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=0
|
|
call psb_erractionsave(err_act)
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
If (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ' start ', upd
|
|
ictxt = psb_cd_get_context(desc_a)
|
|
icomm = psb_cd_get_mpic(desc_a)
|
|
|
|
Call psb_info(ictxt, me, np)
|
|
|
|
tot_recv=0
|
|
|
|
n_row = psb_cd_get_local_rows(desc_a)
|
|
n_col = psb_cd_get_local_cols(desc_a)
|
|
nnzero = psb_sp_get_nnzeros(a)
|
|
nhalo = n_col-n_row
|
|
ptype = p%iprcparm(mld_prec_type_)
|
|
novr = p%iprcparm(mld_n_ovr_)
|
|
|
|
select case (ptype)
|
|
|
|
case(mld_bjac_)
|
|
!
|
|
! Block Jacobi
|
|
!
|
|
data_ = psb_no_comm_
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Calling desccpy'
|
|
if (upd == 'F') then
|
|
call psb_cdcpy(desc_a,p%desc_data,info)
|
|
If(debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ' done cdcpy'
|
|
if(info /= 0) then
|
|
info=4010
|
|
ch_err='psb_cdcpy'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Early return: P>=3 N_OVR=0'
|
|
endif
|
|
call psb_sp_all(0,0,blck,1,info)
|
|
if(info /= 0) then
|
|
info=4010
|
|
ch_err='psb_sp_all'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
blck%fida = 'COO'
|
|
blck%infoa(psb_nnz_) = 0
|
|
|
|
call mld_fact_bld(a,p,upd,info,blck=blck)
|
|
|
|
if (info /= 0) then
|
|
info=4010
|
|
ch_err='mld_fact_bld'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
case(mld_as_)
|
|
!
|
|
! Additive Schwarz
|
|
!
|
|
if (novr < 0) then
|
|
info=3
|
|
int_err(1)=novr
|
|
call psb_errpush(info,name,i_err=int_err)
|
|
goto 9999
|
|
endif
|
|
|
|
if ((novr == 0).or.(np==1)) then
|
|
!
|
|
! Actually, this is just block Jacobi
|
|
!
|
|
data_ = psb_no_comm_
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Calling desccpy'
|
|
if (upd == 'F') then
|
|
call psb_cdcpy(desc_a,p%desc_data,info)
|
|
If(debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ' done cdcpy'
|
|
if(info /= 0) then
|
|
info=4010
|
|
ch_err='psb_cdcpy'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Early return: P>=3 N_OVR=0'
|
|
endif
|
|
call psb_sp_all(0,0,blck,1,info)
|
|
if(info /= 0) then
|
|
info=4010
|
|
ch_err='psb_sp_all'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
blck%fida = 'COO'
|
|
blck%infoa(psb_nnz_) = 0
|
|
|
|
else
|
|
|
|
If (upd == 'F') Then
|
|
!
|
|
! Build the auxiliary descriptor desc_p%matrix_data(psb_n_row_).
|
|
! This is done by psb_cdbldext (interface to psb_cdovr), which is
|
|
! independent of CSR, and has been placed in the tools directory
|
|
! of PSBLAS, instead of the mlprec directory of MLD2P4, because it
|
|
! might be used independently of the AS preconditioner, to build
|
|
! a descriptor for an extended stencil in a PDE solver.
|
|
!
|
|
call psb_cdbldext(a,desc_a,novr,p%desc_data,info,extype=psb_ovt_asov_)
|
|
if(debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& ' From cdbldext _:',p%desc_data%matrix_data(psb_n_row_),&
|
|
& p%desc_data%matrix_data(psb_n_col_)
|
|
|
|
if (info /= 0) then
|
|
info=4010
|
|
ch_err='psb_cdbldext'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
Endif
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'Before sphalo ',blck%fida,blck%m,psb_nnz_,blck%infoa(psb_nnz_)
|
|
|
|
!
|
|
! Retrieve the remote sparse matrix rows required for the AS extended
|
|
! matrix
|
|
data_ = psb_comm_ext_
|
|
Call psb_sphalo(a,p%desc_data,blck,info,data=data_,rowscale=.true.)
|
|
|
|
if (info /= 0) then
|
|
info=4010
|
|
ch_err='psb_sphalo'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if (debug_level >= psb_debug_outer_) &
|
|
& write(debug_unit,*) me,' ',trim(name),&
|
|
& 'After psb_sphalo ',&
|
|
& blck%fida,blck%m,psb_nnz_,blck%infoa(psb_nnz_)
|
|
|
|
End if
|
|
|
|
|
|
call mld_fact_bld(a,p,upd,info,blck=blck)
|
|
|
|
if (info /= 0) then
|
|
info=4010
|
|
ch_err='mld_fact_bld'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
case default
|
|
|
|
info=4001
|
|
ch_err='Invalid ptype'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
|
|
End select
|
|
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_das_bld
|
|
|