! ! 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: psi_dswapdata.F90 ! ! Subroutine: psi_dswapdatam ! Implements the data exchange among processes. Essentially this is doing ! a variable all-to-all data exchange (ALLTOALLV in MPI parlance), but ! it is capable of pruning empty exchanges, which are very likely in our ! application environment. All the variants have the same structure ! In all these subroutines X may be: I Integer ! S real(psb_spk_) ! D real(psb_dpk_) ! C complex(psb_spk_) ! Z complex(psb_dpk_) ! Basically the operation is as follows: on each process, we identify ! sections SND(Y) and RCV(Y); then we do a send on (PACK(SND(Y))); ! then we receive, and we do an update with Y = UNPACK(RCV(Y)) + BETA * Y ! but only on the elements involved in the UNPACK operation. ! Thus: for halo data exchange, the receive section is confined in the ! halo indices, and BETA=0, whereas for overlap exchange the receive section ! is scattered in the owned indices, and BETA=1. ! The first routine picks the desired exchange index list and passes it to the second. ! ! Arguments: ! flag - integer Choose the algorithm for data exchange: ! this is chosen through bit fields. ! swap_mpi = iand(flag,psb_swap_mpi_) /= 0 ! swap_sync = iand(flag,psb_swap_sync_) /= 0 ! swap_send = iand(flag,psb_swap_send_) /= 0 ! swap_recv = iand(flag,psb_swap_recv_) /= 0 ! if (swap_mpi): use underlying MPI_ALLTOALLV. ! if (swap_sync): use PSB_SND and PSB_RCV in ! synchronized pairs ! if (swap_send .and. swap_recv): use mpi_irecv ! and mpi_send ! if (swap_send): use psb_snd (but need another ! call with swap_recv to complete) ! if (swap_recv): use psb_rcv (completing a ! previous call with swap_send) ! ! ! n - integer Number of columns in Y ! beta - real Choose overwrite or sum. ! y(:,:) - real The data area ! desc_a - type(psb_desc_type). The communication descriptor. ! work(:) - real Buffer space. If not sufficient, will do ! our own internal allocation. ! info - integer. return code. ! data - integer which list is to be used to exchange data ! default psb_comm_halo_ ! psb_comm_halo_ use halo_index ! psb_comm_ext_ use ext_index ! psb_comm_ovrl_ use ovrl_index ! psb_comm_mov_ use ovr_mst_idx ! ! subroutine psi_dswapdatam(flag,n,beta,y,desc_a,work,info,data) use psi_mod, psb_protect_name => psi_dswapdatam use psb_error_mod use psb_desc_mod use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer(psb_ipk_), intent(in) :: flag, n integer(psb_ipk_), intent(out) :: info real(psb_dpk_) :: y(:,:), beta real(psb_dpk_), target :: work(:) type(psb_desc_type),target :: desc_a integer(psb_ipk_), optional :: data ! locals type(psb_ctxt_type) :: ctxt integer(psb_mpk_) :: icomm integer(psb_ipk_) :: np, me, idxs, idxr, totxch, data_, err_act integer(psb_ipk_), pointer :: d_idx(:) character(len=20) :: name info=psb_success_ name='psi_swap_data' call psb_erractionsave(err_act) ctxt = desc_a%get_context() icomm = desc_a%get_mpic() call psb_info(ctxt,me,np) if (np == -1) then info=psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif if (.not.psb_is_asb_desc(desc_a)) then info=psb_err_invalid_cd_state_ call psb_errpush(info,name) goto 9999 endif if(present(data)) then data_ = data else data_ = psb_comm_halo_ end if call desc_a%get_list(data_,d_idx,totxch,idxr,idxs,info) if (info /= psb_success_) then call psb_errpush(psb_err_internal_error_,name,a_err='psb_cd_get_list') goto 9999 end if call psi_swapdata(ctxt,icomm,flag,n,beta,y,d_idx,totxch,idxs,idxr,work,info) if (info /= psb_success_) goto 9999 call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psi_dswapdatam subroutine psi_dswapidxm(ctxt,icomm,flag,n,beta,y,idx, & & totxch,totsnd,totrcv,work,info) use psi_mod, psb_protect_name => psi_dswapidxm use psb_error_mod use psb_desc_mod use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif type(psb_ctxt_type), intent(in) :: ctxt integer(psb_mpk_), intent(in) :: icomm integer(psb_ipk_), intent(in) :: flag,n integer(psb_ipk_), intent(out) :: info real(psb_dpk_) :: y(:,:), beta real(psb_dpk_), target :: work(:) integer(psb_ipk_), intent(in) :: idx(:),totxch,totsnd, totrcv ! locals integer(psb_mpk_) :: np, me,& & proc_to_comm, p2ptag, p2pstat(mpi_status_size), iret integer(psb_mpk_), allocatable, dimension(:) :: bsdidx, brvidx,& & sdsz, rvsz, prcid, rvhd, sdhd integer(psb_ipk_) :: nesd, nerv,& & err_act, i, idx_pt, totsnd_, totrcv_,& & snd_pt, rcv_pt, pnti logical :: swap_mpi, swap_sync, swap_send, swap_recv,& & albf,do_send,do_recv logical, parameter :: usersend=.false. real(psb_dpk_), pointer, dimension(:) :: sndbuf, rcvbuf volatile :: sndbuf, rcvbuf character(len=20) :: name info=psb_success_ name='psi_swap_data' call psb_erractionsave(err_act) call psb_info(ctxt,me,np) if (np == -1) then info=psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif swap_mpi = iand(flag,psb_swap_mpi_) /= 0 swap_sync = iand(flag,psb_swap_sync_) /= 0 swap_send = iand(flag,psb_swap_send_) /= 0 swap_recv = iand(flag,psb_swap_recv_) /= 0 do_send = swap_mpi .or. swap_sync .or. swap_send do_recv = swap_mpi .or. swap_sync .or. swap_recv totrcv_ = totrcv * n totsnd_ = totsnd * n if (swap_mpi) then allocate(sdsz(0:np-1), rvsz(0:np-1), bsdidx(0:np-1),& & brvidx(0:np-1), rvhd(0:np-1), sdhd(0:np-1), prcid(0:np-1),& & stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if rvhd(:) = mpi_request_null sdsz(:) = 0 rvsz(:) = 0 ! prepare info for communications pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) prcid(proc_to_comm) = psb_get_mpi_rank(ctxt,proc_to_comm) brvidx(proc_to_comm) = rcv_pt rvsz(proc_to_comm) = n*nerv bsdidx(proc_to_comm) = snd_pt sdsz(proc_to_comm) = n*nesd rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do else allocate(rvhd(totxch),prcid(totxch),stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if end if totrcv_ = max(totrcv_,1) totsnd_ = max(totsnd_,1) if((totrcv_+totsnd_) < size(work)) then sndbuf => work(1:totsnd_) rcvbuf => work(totsnd_+1:totsnd_+totrcv_) albf=.false. else allocate(sndbuf(totsnd_),rcvbuf(totrcv_), stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if albf=.true. end if if (do_send) then ! Pack send buffers pnti = 1 snd_pt = 1 do i=1, totxch nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) idx_pt = 1+pnti+nerv+psb_n_elem_send_ call psi_gth(nesd,n,idx(idx_pt:idx_pt+nesd-1),& & y,sndbuf(snd_pt:snd_pt+n*nesd-1)) snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do end if ! Case SWAP_MPI if (swap_mpi) then ! swap elements using mpi_alltoallv call mpi_alltoallv(sndbuf,sdsz,bsdidx,& & psb_mpi_r_dpk_,rcvbuf,rvsz,& & brvidx,psb_mpi_r_dpk_,icomm,iret) if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if else if (swap_sync) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (proc_to_comm < me) then if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+n*nesd-1), proc_to_comm) if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1), proc_to_comm) else if (proc_to_comm > me) then if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1), proc_to_comm) if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+n*nesd-1), proc_to_comm) else if (proc_to_comm == me) then if (nesd /= nerv) then write(psb_err_unit,*) & & 'Fatal error in swapdata: mismatch on self send',& & nerv,nesd end if rcvbuf(rcv_pt:rcv_pt+n*nerv-1) = sndbuf(snd_pt:snd_pt+n*nesd-1) end if rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do else if (swap_send .and. swap_recv) then ! First I post all the non blocking receives pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) prcid(i) = psb_get_mpi_rank(ctxt,proc_to_comm) if ((nerv>0).and.(proc_to_comm /= me)) then p2ptag = psb_double_swap_tag call mpi_irecv(rcvbuf(rcv_pt),n*nerv,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag, icomm,rvhd(i),iret) end if rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do ! Then I post all the blocking sends if (usersend) call mpi_barrier(icomm,iret) pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) p2ptag = psb_double_swap_tag if ((nesd>0).and.(proc_to_comm /= me)) then if (usersend) then call mpi_rsend(sndbuf(snd_pt),n*nesd,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag,icomm,iret) else call mpi_send(sndbuf(snd_pt),n*nesd,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag,icomm,iret) end if if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if end if rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do pnti = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) p2ptag = psb_double_swap_tag if ((proc_to_comm /= me).and.(nerv>0)) then call mpi_wait(rvhd(i),p2pstat,iret) if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if else if (proc_to_comm == me) then if (nesd /= nerv) then write(psb_err_unit,*)& & 'Fatal error in swapdata: mismatch on self send', & & nerv,nesd end if rcvbuf(rcv_pt:rcv_pt+n*nerv-1) = sndbuf(snd_pt:snd_pt+n*nesd-1) end if pnti = pnti + nerv + nesd + 3 end do else if (swap_send) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+n*nesd-1), proc_to_comm) rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do else if (swap_recv) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1), proc_to_comm) rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do end if if (do_recv) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) idx_pt = 1+pnti+psb_n_elem_recv_ call psi_sct(nerv,n,idx(idx_pt:idx_pt+nerv-1),& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1),beta,y) rcv_pt = rcv_pt + n*nerv snd_pt = snd_pt + n*nesd pnti = pnti + nerv + nesd + 3 end do end if if (swap_mpi) then deallocate(sdsz,rvsz,bsdidx,brvidx,rvhd,prcid,sdhd,& & stat=info) else deallocate(rvhd,prcid,stat=info) end if if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if if(albf) deallocate(sndbuf,rcvbuf,stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psi_dswapidxm ! ! ! Subroutine: psi_dswapdatav ! Implements the data exchange among processes. Essentially this is doing ! a variable all-to-all data exchange (ALLTOALLV in MPI parlance), but ! it is capable of pruning empty exchanges, which are very likely in out ! application environment. All the variants have the same structure ! In all these subroutines X may be: I Integer ! S real(psb_spk_) ! D real(psb_dpk_) ! C complex(psb_spk_) ! Z complex(psb_dpk_) ! Basically the operation is as follows: on each process, we identify ! sections SND(Y) and RCV(Y); then we do a SEND(PACK(SND(Y))); ! then we receive, and we do an update with Y = UNPACK(RCV(Y)) + BETA * Y ! but only on the elements involved in the UNPACK operation. ! Thus: for halo data exchange, the receive section is confined in the ! halo indices, and BETA=0, whereas for overlap exchange the receive section ! is scattered in the owned indices, and BETA=1. ! The first routine picks the desired exchange index list and passes it to the second. ! ! Arguments: ! flag - integer Choose the algorithm for data exchange: ! this is chosen through bit fields. ! swap_mpi = iand(flag,psb_swap_mpi_) /= 0 ! swap_sync = iand(flag,psb_swap_sync_) /= 0 ! swap_send = iand(flag,psb_swap_send_) /= 0 ! swap_recv = iand(flag,psb_swap_recv_) /= 0 ! if (swap_mpi): use underlying MPI_ALLTOALLV. ! if (swap_sync): use PSB_SND and PSB_RCV in ! synchronized pairs ! if (swap_send .and. swap_recv): use mpi_irecv ! and mpi_send ! if (swap_send): use psb_snd (but need another ! call with swap_recv to complete) ! if (swap_recv): use psb_rcv (completing a ! previous call with swap_send) ! ! ! n - integer Number of columns in Y ! beta - real Choose overwrite or sum. ! y(:) - real The data area ! desc_a - type(psb_desc_type). The communication descriptor. ! work(:) - real Buffer space. If not sufficient, will do ! our own internal allocation. ! info - integer. return code. ! data - integer which list is to be used to exchange data ! default psb_comm_halo_ ! psb_comm_halo_ use halo_index ! psb_comm_ext_ use ext_index ! psb_comm_ovrl_ use ovrl_index ! psb_comm_mov_ use ovr_mst_idx ! ! subroutine psi_dswapdatav(flag,beta,y,desc_a,work,info,data) use psi_mod, psb_protect_name => psi_dswapdatav use psb_error_mod use psb_desc_mod use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer(psb_ipk_), intent(in) :: flag integer(psb_ipk_), intent(out) :: info real(psb_dpk_) :: y(:), beta real(psb_dpk_), target :: work(:) type(psb_desc_type),target :: desc_a integer(psb_ipk_), optional :: data ! locals type(psb_ctxt_type) :: ctxt integer(psb_mpk_) :: icomm integer(psb_ipk_) :: np, me, idxs, idxr, totxch, data_, err_act integer(psb_ipk_), pointer :: d_idx(:) character(len=20) :: name info=psb_success_ name='psi_swap_datav' call psb_erractionsave(err_act) ctxt = desc_a%get_context() icomm = desc_a%get_mpic() call psb_info(ctxt,me,np) if (np == -1) then info=psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif if (.not.psb_is_asb_desc(desc_a)) then info=psb_err_invalid_cd_state_ call psb_errpush(info,name) goto 9999 endif if (present(data)) then data_ = data else data_ = psb_comm_halo_ end if call desc_a%get_list(data_,d_idx,totxch,idxr,idxs,info) if (info /= psb_success_) then call psb_errpush(psb_err_internal_error_,name,a_err='psb_cd_get_list') goto 9999 end if call psi_swapdata(ctxt,icomm,flag,beta,y,d_idx,totxch,idxs,idxr,work,info) if (info /= psb_success_) goto 9999 call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psi_dswapdatav ! ! ! Subroutine: psi_dswapdataidxv ! Does the data exchange among processes. ! ! The real workhorse: the outer routines will only choose the index list ! this one takes the index list and does the actual exchange. ! ! ! subroutine psi_dswapidxv(ctxt,icomm,flag,beta,y,idx, & & totxch,totsnd,totrcv,work,info) use psi_mod, psb_protect_name => psi_dswapidxv use psb_error_mod use psb_desc_mod use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif type(psb_ctxt_type), intent(in) :: ctxt integer(psb_mpk_), intent(in) :: icomm integer(psb_ipk_), intent(in) :: flag integer(psb_ipk_), intent(out) :: info real(psb_dpk_) :: y(:), beta real(psb_dpk_), target :: work(:) integer(psb_ipk_), intent(in) :: idx(:),totxch,totsnd, totrcv ! locals integer(psb_ipk_) :: np, me integer(psb_mpk_) :: proc_to_comm, p2ptag, p2pstat(mpi_status_size), iret integer(psb_mpk_), allocatable, dimension(:) :: bsdidx, brvidx,& & sdsz, rvsz, prcid, rvhd, sdhd integer(psb_ipk_) :: nesd, nerv,& & err_act, i, idx_pt, totsnd_, totrcv_,& & snd_pt, rcv_pt, pnti, n logical :: swap_mpi, swap_sync, swap_send, swap_recv,& & albf,do_send,do_recv logical, parameter :: usersend=.false. real(psb_dpk_), pointer, dimension(:) :: sndbuf, rcvbuf volatile :: sndbuf, rcvbuf character(len=20) :: name info=psb_success_ name='psi_swap_datav' call psb_erractionsave(err_act) call psb_info(ctxt,me,np) if (np == -1) then info=psb_err_context_error_ call psb_errpush(info,name) goto 9999 endif n=1 swap_mpi = iand(flag,psb_swap_mpi_) /= 0 swap_sync = iand(flag,psb_swap_sync_) /= 0 swap_send = iand(flag,psb_swap_send_) /= 0 swap_recv = iand(flag,psb_swap_recv_) /= 0 do_send = swap_mpi .or. swap_sync .or. swap_send do_recv = swap_mpi .or. swap_sync .or. swap_recv totrcv_ = totrcv * n totsnd_ = totsnd * n if (swap_mpi) then allocate(sdsz(0:np-1), rvsz(0:np-1), bsdidx(0:np-1),& & brvidx(0:np-1), rvhd(0:np-1), sdhd(0:np-1), prcid(0:np-1),& & stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if rvhd(:) = mpi_request_null sdsz(:) = 0 rvsz(:) = 0 ! prepare info for communications pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) prcid(proc_to_comm) = psb_get_mpi_rank(ctxt,proc_to_comm) brvidx(proc_to_comm) = rcv_pt rvsz(proc_to_comm) = nerv bsdidx(proc_to_comm) = snd_pt sdsz(proc_to_comm) = nesd rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do else allocate(rvhd(totxch),prcid(totxch),stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if end if totrcv_ = max(totrcv_,1) totsnd_ = max(totsnd_,1) if((totrcv_+totsnd_) < size(work)) then sndbuf => work(1:totsnd_) rcvbuf => work(totsnd_+1:totsnd_+totrcv_) albf=.false. else allocate(sndbuf(totsnd_),rcvbuf(totrcv_), stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if albf=.true. end if if (do_send) then ! Pack send buffers pnti = 1 snd_pt = 1 do i=1, totxch nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) idx_pt = 1+pnti+nerv+psb_n_elem_send_ call psi_gth(nesd,idx(idx_pt:idx_pt+nesd-1),& & y,sndbuf(snd_pt:snd_pt+nesd-1)) snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do end if ! Case SWAP_MPI if (swap_mpi) then ! swap elements using mpi_alltoallv call mpi_alltoallv(sndbuf,sdsz,bsdidx,& & psb_mpi_r_dpk_,rcvbuf,rvsz,& & brvidx,psb_mpi_r_dpk_,icomm,iret) if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if else if (swap_sync) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (proc_to_comm < me) then if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+nesd-1), proc_to_comm) if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+nerv-1), proc_to_comm) else if (proc_to_comm > me) then if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+nerv-1), proc_to_comm) if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+nesd-1), proc_to_comm) else if (proc_to_comm == me) then if (nesd /= nerv) then write(psb_err_unit,*) & & 'Fatal error in swapdata: mismatch on self send', & & nerv,nesd end if rcvbuf(rcv_pt:rcv_pt+nerv-1) = sndbuf(snd_pt:snd_pt+nesd-1) end if rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do else if (swap_send .and. swap_recv) then ! First I post all the non blocking receives pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) prcid(i) = psb_get_mpi_rank(ctxt,proc_to_comm) if ((nerv>0).and.(proc_to_comm /= me)) then p2ptag = psb_double_swap_tag call mpi_irecv(rcvbuf(rcv_pt),nerv,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag, icomm,rvhd(i),iret) end if rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do ! Then I post all the blocking sends if (usersend) call mpi_barrier(icomm,iret) pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) p2ptag = psb_double_swap_tag if ((nesd>0).and.(proc_to_comm /= me)) then if (usersend) then call mpi_rsend(sndbuf(snd_pt),nesd,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag,icomm,iret) else call mpi_send(sndbuf(snd_pt),nesd,& & psb_mpi_r_dpk_,prcid(i),& & p2ptag,icomm,iret) end if if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if end if rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do pnti = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) p2ptag = psb_double_swap_tag if ((proc_to_comm /= me).and.(nerv>0)) then call mpi_wait(rvhd(i),p2pstat,iret) if(iret /= mpi_success) then info=psb_err_mpi_error_ call psb_errpush(info,name,m_err=(/iret/)) goto 9999 end if else if (proc_to_comm == me) then if (nesd /= nerv) then write(psb_err_unit,*) & & 'Fatal error in swapdata: mismatch on self send', & & nerv,nesd end if rcvbuf(rcv_pt:rcv_pt+nerv-1) = sndbuf(snd_pt:snd_pt+nesd-1) end if pnti = pnti + nerv + nesd + 3 end do else if (swap_send) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (nesd>0) call psb_snd(ctxt,& & sndbuf(snd_pt:snd_pt+nesd-1), proc_to_comm) rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do else if (swap_recv) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) if (nerv>0) call psb_rcv(ctxt,& & rcvbuf(rcv_pt:rcv_pt+nerv-1), proc_to_comm) rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do end if if (do_recv) then pnti = 1 snd_pt = 1 rcv_pt = 1 do i=1, totxch proc_to_comm = idx(pnti+psb_proc_id_) nerv = idx(pnti+psb_n_elem_recv_) nesd = idx(pnti+nerv+psb_n_elem_send_) idx_pt = 1+pnti+psb_n_elem_recv_ call psi_sct(nerv,idx(idx_pt:idx_pt+nerv-1),& & rcvbuf(rcv_pt:rcv_pt+nerv-1),beta,y) rcv_pt = rcv_pt + nerv snd_pt = snd_pt + nesd pnti = pnti + nerv + nesd + 3 end do end if if (swap_mpi) then deallocate(sdsz,rvsz,bsdidx,brvidx,rvhd,prcid,sdhd,& & stat=info) else deallocate(rvhd,prcid,stat=info) end if if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if if(albf) deallocate(sndbuf,rcvbuf,stat=info) if(info /= psb_success_) then call psb_errpush(psb_err_alloc_dealloc_,name) goto 9999 end if call psb_erractionrestore(err_act) return 9999 call psb_error_handler(ctxt,err_act) return end subroutine psi_dswapidxv