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252 lines
9.9 KiB
Fortran
252 lines
9.9 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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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 PSBLAS 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 PSBLAS 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: psb_d_par_csr_spspmm.f90
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!
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! Subroutine: psb_d_par_csr_spspmm
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! Version: real
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!
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! This routine computes a parallel product of two sparse matrices
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!
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! C = A * B
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!
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! where all the matrices are stored in CSR. On input and output the matrices
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! are stored with column indices in local numbering, but intermediate quantities
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! are in global numbering because gathering the halo of B to multiply it
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! by A implies a potential enlargement of the support.
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! Also, B may have a column index space different from its row index space,
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! which is obviously the same as the column space of A.
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!
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!
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! Arguments:
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! acsr - type(psb_d_csr_sparse_mat), input.
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! The sparse matrix structure A
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! desc_a - type(psb_desc_type), input.
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! The communication descriptor of the column space of A
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! bcsr - type(psb_d_csr_sparse_mat), input/output.
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! The sparse matrix structure B, gets row-extended on output
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! ccsr - type(psb_d_csr_sparse_mat), output
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! The sparse matrix structure C
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! desc_c - type(psb_desc_type), input/output.
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! The communication descriptor of the column space of B
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!
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! info - integer, output.
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! Error code.
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!
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Subroutine psb_d_par_csr_spspmm(acsr,desc_a,bcsr,ccsr,desc_c,info,data)
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use psb_base_mod, psb_protect_name => psb_d_par_csr_spspmm
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Implicit None
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type(psb_d_csr_sparse_mat),intent(in) :: acsr
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type(psb_d_csr_sparse_mat),intent(inout) :: bcsr
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type(psb_d_csr_sparse_mat),intent(out) :: ccsr
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type(psb_desc_type),intent(in) :: desc_a
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type(psb_desc_type),intent(inout) :: desc_c
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: data
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! ...local scalars....
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integer(psb_ipk_) :: ictxt, np,me
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integer(psb_ipk_) :: ncol, nnz
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type(psb_ld_csr_sparse_mat) :: ltcsr
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type(psb_d_csr_sparse_mat) :: tcsr
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logical :: update_desc_c
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integer(psb_ipk_) :: debug_level, debug_unit, err_act
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character(len=20) :: name, ch_err
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if(psb_get_errstatus() /= 0) return
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info=psb_success_
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name='psb_d_p_csr_spspmm'
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),': Start'
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update_desc_c = desc_c%is_bld()
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!
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! This is a bit tricky.
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! DESC_A is the descriptor of (the columns of) A, and therefore
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! of the rows of B; the columns of B, in the intended usage, span
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! a different space for which we have DESC_C.
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! We are gathering the halo rows of B to multiply by A;
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! now, the columns of B would ideally be kept in
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! global numbering, so that we can call this repeatedly to accumulate
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! the product of multiple operators, and convert to local numbering
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! at the last possible moment. However, this would imply calling
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! the serial SPSPMM with a matrix B with the GLOBAL number of columns
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! and this could be very expensive in memory. The solution is to keep B
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! in local numbering, so that only columns really appearing count, but to
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! expand the descriptor when gathering the halo, because by performing
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! the products we are extending the support of the operator; hence
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! this routine is intended to be called with a temporary descriptor
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! DESC_C which is in the BUILD state, to allow for such expansion
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! across multiple products.
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! The caller will at some later point finalize the descriptor DESC_C.
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!
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ncol = desc_a%get_local_cols()
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call psb_sphalo(bcsr,desc_a,ltcsr,info,&
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& colcnv=.true.,rowscale=.true.,outcol_glob=.true.,col_desc=desc_c,data=data)
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nnz = ltcsr%get_nzeros()
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if (update_desc_c) then
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call desc_c%indxmap%g2lip_ins(ltcsr%ja(1:nnz),info)
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else
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call desc_c%indxmap%g2lip(ltcsr%ja(1:nnz),info)
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end if
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call ltcsr%mv_to_ifmt(tcsr,info)
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if (info == psb_success_) call psb_rwextd(ncol,bcsr,info,b=tcsr)
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if (info == psb_success_) call tcsr%free()
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if(info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Extend am3')
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goto 9999
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end if
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call bcsr%set_ncols(desc_c%get_local_cols())
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'starting spspmm 3'
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if (debug_level >= psb_debug_outer_) write(debug_unit,*) me,' ',trim(name),&
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& 'starting spspmm ',acsr%get_nrows(),acsr%get_ncols(),bcsr%get_nrows(),bcsr%get_ncols()
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call psb_spspmm(acsr,bcsr,ccsr,info)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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End Subroutine psb_d_par_csr_spspmm
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Subroutine psb_ld_par_csr_spspmm(acsr,desc_a,bcsr,ccsr,desc_c,info,data)
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use psb_base_mod, psb_protect_name => psb_ld_par_csr_spspmm
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Implicit None
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type(psb_ld_csr_sparse_mat),intent(in) :: acsr
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type(psb_ld_csr_sparse_mat),intent(inout) :: bcsr
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type(psb_ld_csr_sparse_mat),intent(out) :: ccsr
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type(psb_desc_type),intent(in) :: desc_a
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type(psb_desc_type),intent(inout) :: desc_c
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), intent(in), optional :: data
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! ...local scalars....
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integer(psb_ipk_) :: ictxt, np,me
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integer(psb_lpk_) :: nacol, nccol, nnz
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type(psb_ld_csr_sparse_mat) :: tcsr1
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logical :: update_desc_c
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integer(psb_ipk_) :: debug_level, debug_unit, err_act
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character(len=20) :: name, ch_err
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if(psb_get_errstatus() /= 0) return
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info=psb_success_
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name='psb_ld_p_csr_spspmm'
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),': Start'
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update_desc_c = desc_c%is_bld()
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!
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! This is a bit tricky.
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! DESC_A is the descriptor of (the columns of) A, and therefore
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! of the rows of B; the columns of B, in the intended usage, span
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! a different space for which we have DESC_C.
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! We are gathering the halo rows of B to multiply by A;
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! now, the columns of B would ideally be kept in
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! global numbering, so that we can call this repeatedly to accumulate
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! the product of multiple operators, and convert to local numbering
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! at the last possible moment. However, this would imply calling
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! the serial SPSPMM with a matrix B with the GLOBAL number of columns
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! and this could be very expensive in memory. The solution is to keep B
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! in local numbering, so that only columns really appearing count, but to
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! expand the descriptor when gathering the halo, because by performing
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! the products we are extending the support of the operator; hence
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! this routine is intended to be called with a temporary descriptor
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! DESC_C which is in the BUILD state, to allow for such expansion
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! across multiple products.
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! The caller will at some later point finalize the descriptor DESC_C.
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!
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nacol = desc_a%get_local_cols()
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call psb_sphalo(bcsr,desc_a,tcsr1,info,&
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& colcnv=.true.,rowscale=.true.,outcol_glob=.true.,col_desc=desc_c,data=data)
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nnz = tcsr1%get_nzeros()
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if (update_desc_c) then
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call desc_c%indxmap%g2lip_ins(tcsr1%ja(1:nnz),info)
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else
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call desc_c%indxmap%g2lip(tcsr1%ja(1:nnz),info)
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end if
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if (info == psb_success_) call psb_rwextd(nacol,bcsr,info,b=tcsr1)
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if (info == psb_success_) call tcsr1%free()
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if(info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Extend am3')
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goto 9999
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end if
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nccol = desc_c%get_local_cols()
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call bcsr%set_ncols(nccol)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'starting spspmm 3'
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if (debug_level >= psb_debug_outer_) write(debug_unit,*) me,' ',trim(name),&
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& 'starting spspmm ',acsr%get_nrows(),acsr%get_ncols(),bcsr%get_nrows(),bcsr%get_ncols()
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call psb_spspmm(acsr,bcsr,ccsr,info)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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End Subroutine psb_ld_par_csr_spspmm
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