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279 lines
9.1 KiB
Fortran
279 lines
9.1 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4 version 2.0
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
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!!$
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!!$ (C) Copyright 2008,2009,2010
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
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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_caggrmat_nosmth_asb.F90
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!
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! Subroutine: mld_caggrmat_nosmth_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 the 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%parms%coarse_mat
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! specified by the user through mld_cprecinit and mld_cprecset.
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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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!
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! Arguments:
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! a - type(psb_cspmat_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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! p - type(mld_conelev_type), input/output.
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! The 'one-level' data structure that will contain the local
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! part of the matrix to be built as well as the information
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! concerning the prolongator and its transpose.
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! ilaggr - integer, dimension(:), allocatable.
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! The mapping between the row indices of the coarse-level
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! matrix and the row indices of the fine-level matrix.
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! ilaggr(i)=j means that node i in the adjacency graph
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! of the fine-level matrix is mapped onto node j in the
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! adjacency graph of the coarse-level matrix.
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! nlaggr - integer, dimension(:), allocatable.
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! nlaggr(i) contains the aggregates held by process i.
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! info - integer, output.
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! Error code.
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!
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subroutine mld_caggrmat_nosmth_asb(a,desc_a,ilaggr,nlaggr,p,info)
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use psb_base_mod
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use mld_c_inner_mod, mld_protect_name => mld_caggrmat_nosmth_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_cspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(inout) :: ilaggr(:), nlaggr(:)
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type(mld_conelev_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_cspmat_type) :: b
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integer, allocatable :: nzbr(:), idisp(:)
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type(psb_cspmat_type) :: am1,am2
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type(psb_c_coo_sparse_mat) :: acoo1, acoo2, bcoo, ac_coo
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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_nosmth_asb'
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if(psb_get_errstatus().ne.0) return
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info=psb_success_
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call psb_erractionsave(err_act)
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ictxt = desc_a%get_context()
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icomm = desc_a%get_mpic()
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call psb_info(ictxt, me, np)
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nglob = desc_a%get_global_rows()
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nrow = desc_a%get_local_rows()
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ncol = desc_a%get_local_cols()
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naggr = nlaggr(me+1)
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ntaggr = sum(nlaggr)
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allocate(nzbr(np), idisp(np),stat=info)
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if (info /= psb_success_) then
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info=psb_err_alloc_request_
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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(nlaggr(1:me))
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if (p%parms%coarse_mat == mld_repl_mat_) then
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do i=1, nrow
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ilaggr(i) = ilaggr(i) + naggrm1
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end do
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call psb_halo(ilaggr,desc_a,info)
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end if
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if(info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='psb_halo')
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goto 9999
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end if
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if (p%parms%coarse_mat == mld_repl_mat_) then
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call acoo1%allocate(ncol,ntaggr,ncol)
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else
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call acoo1%allocate(ncol,naggr,ncol)
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end if
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do i=1,nrow
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acoo1%val(i) = cone
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acoo1%ia(i) = i
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acoo1%ja(i) = ilaggr(i)
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end do
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call acoo1%set_dupl(psb_dupl_add_)
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call acoo1%set_nzeros(nrow)
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call acoo1%set_asb()
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call acoo1%fix(info)
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call acoo1%transp(acoo2)
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call a%csclip(bcoo,info,jmax=nrow)
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nzt = bcoo%get_nzeros()
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do i=1, nzt
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bcoo%ia(i) = ilaggr(bcoo%ia(i))
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bcoo%ja(i) = ilaggr(bcoo%ja(i))
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enddo
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call bcoo%set_nrows(naggr)
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call bcoo%set_ncols(naggr)
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call bcoo%set_dupl(psb_dupl_add_)
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call bcoo%fix(info)
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if (p%parms%coarse_mat == mld_repl_mat_) then
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call psb_cdall(ictxt,p%desc_ac,info,mg=ntaggr,repl=.true.)
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if (info == psb_success_) call psb_cdasb(p%desc_ac,info)
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if(info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,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 ac_coo%allocate(ntaggr,ntaggr,nzac)
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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(bcoo%val,ndx,mpi_complex,ac_coo%val,nzbr,idisp,&
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& mpi_real,icomm,info)
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call mpi_allgatherv(bcoo%ia,ndx,mpi_integer,ac_coo%ia,nzbr,idisp,&
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& mpi_integer,icomm,info)
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call mpi_allgatherv(bcoo%ja,ndx,mpi_integer,ac_coo%ja,nzbr,idisp,&
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& mpi_integer,icomm,info)
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if(info /= psb_success_) 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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call ac_coo%set_nzeros(nzac)
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call ac_coo%set_dupl(psb_dupl_add_)
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call ac_coo%fix(info)
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call p%ac%mv_from(ac_coo)
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else if (p%parms%coarse_mat == mld_distr_mat_) then
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call psb_cdall(ictxt,p%desc_ac,info,nl=naggr)
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if (info == psb_success_) call psb_cdasb(p%desc_ac,info)
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call p%ac%mv_from(bcoo)
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if(info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Build ac, desc_ac')
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goto 9999
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end if
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else
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info = psb_err_internal_error_
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call psb_errpush(psb_err_internal_error_,name,a_err='invalid mld_coarse_mat_')
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goto 9999
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end if
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call bcoo%free()
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deallocate(nzbr,idisp)
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call p%ac%cscnv(info,type='csr',dupl=psb_dupl_add_)
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if(info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='cscnv')
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goto 9999
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end if
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call am1%mv_from(acoo1)
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call am1%cscnv(info,type='csr',dupl=psb_dupl_add_)
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if (info == psb_success_) call am2%mv_from(acoo2)
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if (info == psb_success_) call am2%cscnv(info,type='csr',dupl=psb_dupl_add_)
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!
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! Copy the prolongation/restriction matrices into the descriptor map.
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! am2 => PR^T i.e. restriction operator
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! am1 => PR i.e. prolongation operator
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!
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if (info == psb_success_) &
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& p%map = psb_linmap(psb_map_aggr_,desc_a,&
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& p%desc_ac,am2,am1,ilaggr,nlaggr)
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if (info == psb_success_) call am1%free()
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if (info == psb_success_) call am2%free()
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if(info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='linmap build')
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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_caggrmat_nosmth_asb
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