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psblas3/base/tools/psb_s_remote_mat.F90

277 lines
10 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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 PSBLAS 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 PSBLAS 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: psb_s_remote_mat.f90
!
! Subroutine:
! This routine does the retrieval of remote matrix rows.
! Retrieval is done through GETROW, therefore it should work
! for any matrix format in A; as for the output, default is CSR.
!
! There is also a specialized version ls_CSR whose interface
! is adapted for the needs of s_par_csr_spspmm.
!
! There are three possible exchange algorithms:
! 1. Use MPI_Alltoallv
! 2. Use psb_simple_a2av
! 3. Use psb_simple_triad_a2av
! Default choice is 3. The MPI variant has proved to be inefficient;
! that is because it is not persistent, therefore you pay the initialization price
! every time, and it is not optimized for a sparse communication pattern,
! most MPI implementations assume that all communications are non-empty.
! The PSB_SIMPLE variants reuse the same communicator, and go for a simplistic
! sequence of sends/receive that is quite efficient for a sparse communication
! pattern. To be refined/reviewed in the future to compare with neighbour
! persistent collectives.
!
! Arguments:
! a - type(psb_sspmat_type) The local part of input matrix A
! desc_a - type(psb_desc_type). The communication descriptor.
! blck - type(psb_sspmat_type) The local part of output matrix BLCK
! info - integer. Return code
! rowcnv - logical Should row/col indices be converted
! colcnv - logical to/from global numbering when sent/received?
! default is .TRUE.
! rowscale - logical Should row/col indices on output be remapped
! colscale - logical from MIN:MAX to 1:(MAX-MIN+1) ?
! default is .FALSE.
! (commmon use is ROWSCALE=.TRUE., COLSCALE=.FALSE.)
! data - integer Which index list in desc_a should be used to retrieve
! rows, default psb_comm_halo_
! psb_comm_halo_ use halo_index
! psb_comm_ext_ use ext_index
! psb_comm_ovrl_ DISABLED for this routine.
!
Subroutine psb_ls_remote_mat(a,desc_a,b,info)
use psb_base_mod, psb_protect_name => psb_ls_remote_mat
#ifdef MPI_MOD
use mpi
#endif
Implicit None
#ifdef MPI_H
include 'mpif.h'
#endif
Type(psb_ls_coo_sparse_mat),Intent(inout) :: a
Type(psb_ls_coo_sparse_mat),Intent(inout) :: b
Type(psb_desc_type), Intent(inout) :: desc_a
integer(psb_ipk_), intent(out) :: info
! ...local scalars....
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: np,me
integer(psb_ipk_) :: counter, proc, i, n_el_send,n_el_recv, &
& n_elem, j, ipx,idxs,idxr
integer(psb_lpk_) :: r, k, irmin, irmax, icmin, icmax, iszs, iszr, &
& lidx, l1, lnr, lnc, lnnz, idx, ngtz, tot_elem
integer(psb_lpk_) :: nz,nouth
integer(psb_ipk_) :: nrcvs, nsnds
integer(psb_mpk_) :: icomm, minfo
integer(psb_mpk_), allocatable :: brvindx(:), &
& rvsz(:), bsdindx(:),sdsz(:), sdsi(:), rvsi(:)
integer(psb_lpk_), allocatable :: iasnd(:), jasnd(:)
real(psb_spk_), allocatable :: valsnd(:)
type(psb_ls_coo_sparse_mat), allocatable :: acoo
class(psb_i_base_vect_type), pointer :: pdxv
integer(psb_ipk_), allocatable :: ila(:), iprc(:)
logical :: rowcnv_,colcnv_,rowscale_,colscale_
character(len=5) :: outfmt_
integer(psb_ipk_) :: debug_level, debug_unit, err_act
character(len=20) :: name, ch_err
info=psb_success_
name='psb_s_remote_mat'
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ctxt = desc_a%get_context()
icomm = desc_a%get_mpic()
Call psb_info(ctxt, me, np)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),': Start'
call b%free()
Allocate(rvsz(np),sdsz(np),sdsi(np),rvsi(np),brvindx(np+1),&
& bsdindx(np+1), acoo,stat=info)
if (info /= psb_success_) then
info=psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
nz = a%get_nzeros()
!allocate(ila(nz))
!write(0,*) me,name,' size :',nz,size(ila)
!call desc_a%g2l(a%ia(1:nz),ila(1:nz),info,owned=.false.)
!nouth = count(ila(1:nz)<0)
!write(0,*) me,name,' Count out of halo :',nouth
!call psb_max(ctxt,nouth)
!if ((nouth/=0).and.(me==0)) &
! & write(0,*) 'Warning: would require reinit of DESC_A'
call desc_a%indxmap%fnd_owner(a%ia(1:nz),iprc,info)
icomm = desc_a%get_mpic()
sdsz(:)=0
rvsz(:)=0
sdsi(:)=0
rvsi(:)=0
ipx = 1
brvindx(:) = 0
bsdindx(:) = 0
counter=1
idx = 0
idxs = 0
idxr = 0
do i=1,nz
if (iprc(i) >=0) then
sdsz(iprc(i)+1) = sdsz(iprc(i)+1) +1
else
write(0,*)me,name,' Error from fnd_owner: ',iprc(i)
end if
end do
call mpi_alltoall(sdsz,1,psb_mpi_mpk_,&
& rvsz,1,psb_mpi_mpk_,icomm,minfo)
if (minfo /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='mpi_alltoall')
goto 9999
end if
!write(0,*)me,name,' sdsz ',sdsz(:),' rvsz:',rvsz(:)
nsnds = count(sdsz /= 0)
nrcvs = count(rvsz /= 0)
idxs = 0
idxr = 0
counter = 1
Do proc=0,np-1
bsdindx(proc+1) = idxs
idxs = idxs + sdsz(proc+1)
brvindx(proc+1) = idxr
idxr = idxr + rvsz(proc+1)
Enddo
iszs = sum(sdsz)
iszr = sum(rvsz)
call acoo%allocate(desc_a%get_global_rows(),desc_a%get_global_cols(),iszr)
if (psb_errstatus_fatal()) then
write(0,*) 'Error from acoo%allocate '
info = 4010
goto 9999
end if
if (debug_level >= psb_debug_outer_)&
& write(debug_unit,*) me,' ',trim(name),': Sizes:',acoo%get_size(),&
& ' Send:',sdsz(:),' Receive:',rvsz(:)
!write(debug_unit,*) me,' ',trim(name),': ',info
if (info == psb_success_) call psb_ensure_size(max(iszs,1),iasnd,info)
!write(debug_unit,*) me,' ',trim(name),' iasnd: ',info
if (info == psb_success_) call psb_ensure_size(max(iszs,1),jasnd,info)
!write(debug_unit,*) me,' ',trim(name),' jasnd: ',info
if (info == psb_success_) call psb_ensure_size(max(iszs,1),valsnd,info)
!write(debug_unit,*) me,' ',trim(name),' valsnd: ',info
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='ensure_size')
goto 9999
end if
do k=1, nz
proc = iprc(k)
sdsi(proc+1) = sdsi(proc+1) + 1
!rvsi(proc) = rvsi(proc) + 1
iasnd(bsdindx(proc+1)+sdsi(proc+1)) = a%ia(k)
jasnd(bsdindx(proc+1)+sdsi(proc+1)) = a%ja(k)
valsnd(bsdindx(proc+1)+sdsi(proc+1)) = a%val(k)
end do
do proc=0,np-1
if (sdsi(proc+1) /= sdsz(proc+1)) &
& write(0,*) me,name,'Send mismacth ',sdsi(proc+1),sdsz(proc+1)
end do
select case(psb_get_sp_a2av_alg())
case(psb_sp_a2av_smpl_triad_)
call psb_simple_triad_a2av(valsnd,iasnd,jasnd,sdsz,bsdindx,&
& acoo%val,acoo%ia,acoo%ja,rvsz,brvindx,ctxt,info)
case(psb_sp_a2av_smpl_v_)
call psb_simple_a2av(valsnd,sdsz,bsdindx,&
& acoo%val,rvsz,brvindx,ctxt,info)
if (info == psb_success_) call psb_simple_a2av(iasnd,sdsz,bsdindx,&
& acoo%ia,rvsz,brvindx,ctxt,info)
if (info == psb_success_) call psb_simple_a2av(jasnd,sdsz,bsdindx,&
& acoo%ja,rvsz,brvindx,ctxt,info)
case(psb_sp_a2av_mpi_)
call mpi_alltoallv(valsnd,sdsz,bsdindx,psb_mpi_r_spk_,&
& acoo%val,rvsz,brvindx,psb_mpi_r_spk_,icomm,minfo)
if (minfo == mpi_success) &
& call mpi_alltoallv(iasnd,sdsz,bsdindx,psb_mpi_lpk_,&
& acoo%ia,rvsz,brvindx,psb_mpi_lpk_,icomm,minfo)
if (minfo == mpi_success) &
& call mpi_alltoallv(jasnd,sdsz,bsdindx,psb_mpi_lpk_,&
& acoo%ja,rvsz,brvindx,psb_mpi_lpk_,icomm,minfo)
if (minfo /= mpi_success) info = minfo
case default
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='wrong A2AV alg selector')
goto 9999
end select
if (info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='alltoallv')
goto 9999
end if
call acoo%set_nzeros(iszr)
call acoo%mv_to_coo(b,info)
Deallocate(brvindx,bsdindx,rvsz,sdsz,&
& iasnd,jasnd,valsnd,stat=info)
if (debug_level >= psb_debug_outer_)&
& write(debug_unit,*) me,' ',trim(name),': Done'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
End Subroutine psb_ls_remote_mat