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285 lines
8.7 KiB
Fortran
285 lines
8.7 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4 version 1.0
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 2.2)
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!!$
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!!$ (C) Copyright 2008
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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!!$ Pasqua D'Ambra ICAR-CNR, Naples
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!!$ Daniela di Serafino Second University of Naples
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!!$
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!!$ Redistribution and use in source and binary forms, with or without
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!!$ modification, are permitted provided that the following conditions
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!!$ are met:
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!!$ 1. Redistributions of source code must retain the above copyright
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!!$ notice, this list of conditions and the following disclaimer.
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!!$ 2. Redistributions in binary form must reproduce the above copyright
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!!$ notice, this list of conditions, and the following disclaimer in the
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!!$ documentation and/or other materials provided with the distribution.
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!!$ 3. The name of the MLD2P4 group or the names of its contributors may
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!!$ not be used to endorse or promote products derived from this
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!!$ software without specific written permission.
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!!$
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!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
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!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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! File: mld_zaggrmat_raw_asb.F90
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!
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! Subroutine: mld_zaggrmat_raw_asb
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! Version: complex
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!
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! This routine builds a coarse-level matrix A_C from a fine-level matrix A
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! by using a Galerkin approach, i.e.
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!
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! A_C = P_C^T A P_C,
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!
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! where P_C is the piecewise constant interpolation operator corresponding
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! the fine-to-coarse level mapping built by mld_aggrmap_bld.
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!
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! The coarse-level matrix A_C is distributed among the parallel processes or
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! replicated on each of them, according to the value of p%iprcparm(mld_coarse_mat_),
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! specified by the user through mld_dprecinit and mld_dprecset.
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!
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! For details see
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! P. D'Ambra, D. di Serafino and S. Filippone, On the development of
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! PSBLAS-based parallel two-level Schwarz preconditioners, Appl. Num. Math.,
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! 57 (2007), 1181-1196.
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!
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!
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! Arguments:
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! a - type(psb_zspmat_type), input.
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! The sparse matrix structure containing the local part of
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! the fine-level matrix.
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! desc_a - type(psb_desc_type), input.
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! The communication descriptor of the fine-level matrix.
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! ac - type(psb_zspmat_type), output.
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! The sparse matrix structure containing the local part of
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! the coarse-level matrix.
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! desc_ac - type(psb_desc_type), output.
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! The communication descriptor of the coarse-level matrix.
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! p - type(mld_zbaseprc_type), input/output.
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! The base preconditioner data structure containing the local
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! part of the base preconditioner to be built.
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! info - integer, output.
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! Error code.
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!
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subroutine mld_zaggrmat_raw_asb(a,desc_a,ac,desc_ac,p,info)
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use psb_base_mod
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use mld_inner_mod, mld_protect_name => mld_zaggrmat_raw_asb
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#ifdef MPI_MOD
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use mpi
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#endif
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implicit none
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#ifdef MPI_H
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include 'mpif.h'
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#endif
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! Arguments
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type(psb_zspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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type(psb_zspmat_type), intent(out) :: ac
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type(psb_desc_type), intent(out) :: desc_ac
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type(mld_zbaseprc_type), intent(inout), target :: p
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integer, intent(out) :: info
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! Local variables
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integer ::ictxt,np,me, err_act, icomm
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character(len=20) :: name
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type(psb_zspmat_type) :: b
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integer, pointer :: nzbr(:), idisp(:)
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type(psb_zspmat_type), pointer :: am1,am2
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integer :: nrow, nglob, ncol, ntaggr, nzac, ip, ndx,&
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& naggr, nzt,naggrm1, i
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name='mld_aggrmat_raw_asb'
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if(psb_get_errstatus().ne.0) return
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info=0
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call psb_erractionsave(err_act)
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call psb_nullify_sp(b)
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ictxt = psb_cd_get_context(desc_a)
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icomm = psb_cd_get_mpic(desc_a)
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call psb_info(ictxt, me, np)
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nglob = psb_cd_get_global_rows(desc_a)
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nrow = psb_cd_get_local_rows(desc_a)
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ncol = psb_cd_get_local_cols(desc_a)
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am2 => p%av(mld_sm_pr_t_)
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am1 => p%av(mld_sm_pr_)
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call psb_nullify_sp(am1)
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call psb_nullify_sp(am2)
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naggr = p%nlaggr(me+1)
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ntaggr = sum(p%nlaggr)
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allocate(nzbr(np), idisp(np),stat=info)
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if (info /= 0) then
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info=4025
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call psb_errpush(info,name,i_err=(/2*np,0,0,0,0/),&
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& a_err='integer')
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goto 9999
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end if
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naggrm1=sum(p%nlaggr(1:me))
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if (p%iprcparm(mld_coarse_mat_) == mld_repl_mat_) then
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do i=1, nrow
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p%mlia(i) = p%mlia(i) + naggrm1
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end do
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call psb_halo(p%mlia,desc_a,info)
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end if
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='psb_halo')
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goto 9999
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end if
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if (p%iprcparm(mld_coarse_mat_) == mld_repl_mat_) then
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call psb_sp_all(ncol,ntaggr,am1,ncol,info)
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else
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call psb_sp_all(ncol,naggr,am1,ncol,info)
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end if
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='spall')
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goto 9999
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end if
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do i=1,nrow
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am1%aspk(i) = zone
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am1%ia1(i) = i
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am1%ia2(i) = p%mlia(i)
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end do
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am1%infoa(psb_nnz_) = nrow
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call psb_spcnv(am1,info,afmt='csr',dupl=psb_dupl_add_)
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call psb_transp(am1,am2)
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call psb_sp_clip(a,b,info,jmax=nrow)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='spclip')
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goto 9999
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end if
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! Out from sp_clip is always in COO, but just in case..
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if (tolower(b%fida) /= 'coo') then
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call psb_errpush(4010,name,a_err='spclip NOT COO')
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goto 9999
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end if
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nzt = psb_sp_get_nnzeros(b)
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do i=1, nzt
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b%ia1(i) = p%mlia(b%ia1(i))
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b%ia2(i) = p%mlia(b%ia2(i))
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enddo
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b%m = naggr
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b%k = naggr
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! This is to minimize data exchange
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call psb_spcnv(b,info,afmt='coo',dupl=psb_dupl_add_)
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if (p%iprcparm(mld_coarse_mat_) == mld_repl_mat_) then
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call psb_cdall(ictxt,desc_ac,info,mg=ntaggr,repl=.true.)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='psb_cdall')
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goto 9999
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end if
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nzbr(:) = 0
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nzbr(me+1) = nzt
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call psb_sum(ictxt,nzbr(1:np))
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nzac = sum(nzbr)
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call psb_sp_all(ntaggr,ntaggr,ac,nzac,info)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='sp_all')
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goto 9999
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end if
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do ip=1,np
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idisp(ip) = sum(nzbr(1:ip-1))
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enddo
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ndx = nzbr(me+1)
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call mpi_allgatherv(b%aspk,ndx,mpi_double_complex,ac%aspk,nzbr,idisp,&
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& mpi_double_complex,icomm,info)
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call mpi_allgatherv(b%ia1,ndx,mpi_integer,ac%ia1,nzbr,idisp,&
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& mpi_integer,icomm,info)
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call mpi_allgatherv(b%ia2,ndx,mpi_integer,ac%ia2,nzbr,idisp,&
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& mpi_integer,icomm,info)
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if(info /= 0) then
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info=-1
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call psb_errpush(info,name)
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goto 9999
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end if
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ac%m = ntaggr
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ac%k = ntaggr
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ac%infoa(psb_nnz_) = nzac
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ac%fida='COO'
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ac%descra='GUN'
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call psb_spcnv(ac,info,afmt='coo',dupl=psb_dupl_add_)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='sp_free')
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goto 9999
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end if
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else if (p%iprcparm(mld_coarse_mat_) == mld_distr_mat_) then
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call psb_cdall(ictxt,desc_ac,info,nl=naggr)
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if (info == 0) call psb_cdasb(desc_ac,info)
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if (info == 0) call psb_sp_clone(b,ac,info)
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if(info /= 0) then
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call psb_errpush(4001,name,a_err='Build ac, desc_ac')
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goto 9999
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end if
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call psb_sp_free(b,info)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='sp_free')
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goto 9999
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end if
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else
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info = 4001
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call psb_errpush(4001,name,a_err='invalid mld_coarse_mat_')
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goto 9999
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end if
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deallocate(nzbr,idisp)
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call psb_spcnv(ac,info,afmt='csr',dupl=psb_dupl_add_)
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if(info /= 0) then
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call psb_errpush(4010,name,a_err='ipcoo2csr')
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goto 9999
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act.eq.psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine mld_zaggrmat_raw_asb
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