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.
139 lines
5.2 KiB
Fortran
139 lines
5.2 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_zumf_bld.f90
|
|
!
|
|
! Subroutine: mld_zumf_bld
|
|
! Version: complex
|
|
!
|
|
! This routine computes the LU factorization of the local part of the matrix
|
|
! stored into a, by using UMFPACK.
|
|
!
|
|
! The local matrix to be factorized is
|
|
! - either a submatrix of the distributed matrix corresponding to any level
|
|
! of a multilevel preconditioner, and its factorization is used to build
|
|
! the 'base preconditioner' corresponding to that level,
|
|
! - or a copy of the whole matrix corresponding to the coarsest level of
|
|
! a multilevel preconditioner, and its factorization is used to build
|
|
! the 'base preconditioner' corresponding to the coarsest level.
|
|
!
|
|
! The data structures allocated by UMFPACK to compute the symbolic and the
|
|
! numeric factorization are pointed by p%iprcparm(mld_umf_symptr_) and
|
|
! p%iprcparm(mld_umf_numptr_).
|
|
!
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_zspmat_type), input/output.
|
|
! The sparse matrix structure containing the local submatrix
|
|
! to be factorized. Note that a is intent(inout), and not only
|
|
! intent(in), since the row and column indices of the matrix
|
|
! stored in a are shifted by -1, and then again by +1, by the
|
|
! routine mld_zumf_fact, which is an interface to the UMFPACK
|
|
! C code performing the factorization.
|
|
! desc_a - type(psb_desc_type), input.
|
|
! The communication descriptor associated to a.
|
|
! p - type(mld_zbaseprec_type), input/output.
|
|
! The 'base preconditioner' data structure containing the pointers,
|
|
! p%iprcparm(mld_umf_symptr_) and p%iprcparm(mld_umf_numptr_),
|
|
! to the data structures used by UMFPACK for computing the LU
|
|
! factorization.
|
|
! info - integer, output.
|
|
! Error code.
|
|
!
|
|
subroutine mld_zumf_bld(a,desc_a,p,info)
|
|
|
|
use psb_sparse_mod
|
|
use mld_inner_mod, mld_protect_name => mld_zumf_bld
|
|
|
|
implicit none
|
|
|
|
! Arguments
|
|
type(psb_zspmat_type), intent(inout) :: a
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
type(mld_zbaseprec_type), intent(inout) :: p
|
|
integer, intent(out) :: info
|
|
|
|
! Local variables
|
|
integer :: nzt,ictxt,me,np,err_act
|
|
integer :: i_err(5)
|
|
character(len=20) :: name
|
|
|
|
info=psb_success_
|
|
name='mld_zumf_bld'
|
|
call psb_erractionsave(err_act)
|
|
ictxt = psb_cd_get_context(desc_a)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
if (psb_toupper(a%fida) /= 'CSC') then
|
|
info=psb_err_unsupported_format_
|
|
call psb_errpush(info,name,a_err=a%fida)
|
|
goto 9999
|
|
endif
|
|
|
|
nzt = psb_sp_get_nnzeros(a)
|
|
|
|
!
|
|
! Compute the LU factorization
|
|
!
|
|
call mld_zumf_fact(a%m,nzt,&
|
|
& a%aspk,a%ia1,a%ia2,&
|
|
& p%iprcparm(mld_umf_symptr_),p%iprcparm(mld_umf_numptr_),info)
|
|
|
|
if (info /= psb_success_) then
|
|
i_err(1) = info
|
|
info=4110
|
|
call psb_errpush(info,name,a_err='mld_umf_fact',i_err=i_err)
|
|
goto 9999
|
|
end if
|
|
|
|
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_zumf_bld
|
|
|
|
|
|
|