! ! 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. ! ! ! ! Subroutine: psb_c_remap ! ! Arguments: ! desc_in - type(psb_desc_type). The communication descriptor to be cloned. ! desc_out - type(psb_desc_type). The output communication descriptor. ! info - integer. Return code. subroutine psb_c_remap(np_remap, desc_in, a_in, desc_out, isrc, nrsrc, a_out, info) use psb_base_mod, psb_protect_name => psb_c_remap implicit none !....parameters... integer(psb_ipk_), intent(in) :: np_remap type(psb_desc_type), intent(inout) :: desc_in type(psb_cspmat_type), intent(inout) :: a_in type(psb_cspmat_type), intent(out) :: a_out type(psb_desc_type), intent(out) :: desc_out integer(psb_ipk_), allocatable, intent(out) :: isrc(:), nrsrc(:) integer(psb_ipk_), intent(out) :: info ! locals integer(psb_ipk_) :: np, me, ictxt, err_act integer(psb_ipk_) :: rnp, rme, newctxt integer(psb_ipk_) :: ipdest, ipd, id1, id2, imd, i, nsrc integer(psb_ipk_), allocatable :: newnl(:), nzsrc(:), ids(:) type(psb_lc_coo_sparse_mat) :: acoo_snd, acoo_rcv integer(psb_ipk_) :: debug_level, debug_unit character(len=20) :: name debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() if (psb_get_errstatus() /= 0) return info = psb_success_ call psb_erractionsave(err_act) name = 'psb_cdcpy' ictxt = desc_in%get_context() ! check on blacs grid call psb_info(ictxt, me, np) if (debug_level >= psb_debug_ext_) & & write(debug_unit,*) me,' ',trim(name),': Entered' if (np == -1) then info = psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif write(0,*) ' Remapping from ',np,' onto ', np_remap if (desc_in%get_fmt() == 'BLOCK') then ! ! Should we spread the processes in the new context, ! or should we keep them close? ! if (.true.) then allocate(ids(0:np_remap-1)) if (np_remap <= np/2) then ids(0) = 0 do ipdest=1,np_remap -1 ids(ipdest) = ids(ipdest-1) + np/np_remap end do write(0,*) ' IDS ',ids(:) else do ipdest = 0, np_remap-1 ids(ipdest) = ipdest end do end if call psb_init(newctxt,np=np_remap,basectxt=ictxt,ids=ids) else call psb_init(newctxt,np=np_remap,basectxt=ictxt) end if call psb_info(newctxt,rme,rnp) write(0,*) 'Old context: ',me,np,' New context: ',rme,rnp call psb_bcast(ictxt,rnp) allocate(newnl(rnp),stat=info) if (info /= 0) then info = psb_err_alloc_dealloc_ call psb_errpush(info,name) goto 9999 endif if (rnp >= np) then write(0,*) ' No remapping on larger proc count now' info = psb_err_internal_error_ call psb_errpush(info,name) goto 9999 end if ! ! Compute destination for my data. ! Simplistic reallocation: divide the NP processes ! across the new ones (as balanced as possible), ! then send all data from old to new process ! id2 = np/rnp id1 = id2+1 imd = mod(np,rnp) if (me < (imd*id1)) then ipdest = (me/id1) else ipdest = ( ((me-imd*id1)/id2) + imd) end if if (allocated(ids)) then ipd = ids(ipdest) else ipd = ipdest end if write(0,*) ' Sending my data from ',me,' to ', & & ipd, 'out of ',rnp,rnp-1 ! ! Compute local rows for all new ! processes; will have a BLOCK distribution ! newnl = 0 newnl(ipdest+1) = desc_in%get_local_rows() call psb_sum(ictxt,newnl) if (rme>=0) then ! if (rme < imd) then isrc = [ (i, i=rme*id1,min(rme*id1+id1-1,np-1)) ] else isrc = [ (i, i= imd*id1+((rme-imd))*id2,& & min(imd*id1+(rme-imd)*id2+id2-1,np-1) ) ] end if write(0,*) me,rme,imd,' ISRC: ',isrc(:) nsrc = size(isrc) write(0,*) me,rme,'In ',desc_in%get_local_rows(),desc_in%get_global_rows(),& & ' out ',desc_out%get_local_rows(),desc_out%get_global_rows() else write(0,*) me,rme,'In ',desc_in%get_local_rows(),desc_in%get_global_rows(),& & ' out ',0,0 end if else write(0,*) 'Right now only BLOCK on input ' info = psb_err_invalid_cd_state_ call psb_errpush(info,name) goto 9999 endif ! ! Collect matrices on their destinations ! block integer(psb_ipk_) :: nzsnd, nzrcv, ip integer(psb_ipk_) :: nrl, ncl, nzl, nzp call a_in%cp_to(acoo_snd) nzsnd = acoo_snd%get_nzeros() call psb_snd(ictxt,nzsnd,ipd) call psb_snd(ictxt,desc_in%get_local_rows(),ipd) ! Convert to global numbering call psb_loc_to_glob(acoo_snd%ia(1:nzsnd),desc_in,info) call psb_loc_to_glob(acoo_snd%ja(1:nzsnd),desc_in,info) call psb_snd(ictxt,acoo_snd%ia(1:nzsnd),ipd) call psb_snd(ictxt,acoo_snd%ja(1:nzsnd),ipd) call psb_snd(ictxt,acoo_snd%val(1:nzsnd),ipd) if (rme>=0) then ! prepare to receive nzsrc = isrc nrsrc = isrc nzl = 0 do ip=1, nsrc call psb_rcv(ictxt,nzsrc(ip),isrc(ip)) call psb_rcv(ictxt,nrsrc(ip),isrc(ip)) nzl = nzl + nzsrc(ip) end do call acoo_rcv%allocate(newnl(rme+1),newnl(rme+1),nzl) nrl = acoo_rcv%get_nrows() ncl = acoo_rcv%get_ncols() nzp = 0 do ip=1, nsrc call psb_rcv(ictxt,acoo_rcv%ia(nzp+1:nzp+nzsrc(ip)),isrc(ip)) call psb_rcv(ictxt,acoo_rcv%ja(nzp+1:nzp+nzsrc(ip)),isrc(ip)) call psb_rcv(ictxt,acoo_rcv%val(nzp+1:nzp+nzsrc(ip)),isrc(ip)) nzp = nzp + nzsrc(ip) end do call acoo_rcv%set_nzeros(nzp) write(0,*) rme,' Collected: ',& & acoo_rcv%get_nrows(),acoo_rcv%get_ncols(),acoo_rcv%get_nzeros() ! ! New descriptor ! call psb_cdall(newctxt,desc_out,info,nl=newnl(rme+1)) ! Insert call psb_spall(a_out,desc_out,info) call psb_spins(nzp,acoo_rcv%ia(1:nzp),acoo_rcv%ja(1:nzp),& & acoo_rcv%val(1:nzp),a_out,desc_out,info) ! Assemble call psb_cdasb(desc_out,info) call psb_spasb(a_out,desc_out,info) write(0,*) rme,' Regenerated: ',& & desc_out%get_local_rows(), desc_out%get_local_cols(),& & a_out%get_nrows(),a_out%get_ncols(),a_out%get_nzeros() !!$ call desc_out%free(info) !!$ call psb_exit(newctxt,close=.false.) end if end block call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ictxt,err_act) return end subroutine psb_c_remap