!!$ !!$ Parallel Sparse BLAS version 2.2 !!$ (C) Copyright 2006/2007/2008 !!$ Salvatore Filippone University of Rome Tor Vergata !!$ Alfredo Buttari University of Rome Tor Vergata !!$ !!$ 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. 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File: psi_zswapdata.F90 ! ! Subroutine: psi_zswapdatam ! Does 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 ! D real(psb_dpk_) ! 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. ! ! 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 - X Choose overwrite or sum. ! y(:,:) - X The data area ! desc_a - type(psb_desc_type). The communication descriptor. ! work(:) - X 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_zswapdatam(flag,n,beta,y,desc_a,work,info,data) use psi_mod, psb_protect_name => psi_zswapdatam use psb_error_mod use psb_descriptor_type use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer, intent(in) :: flag, n integer, intent(out) :: info complex(psb_dpk_) :: y(:,:), beta complex(psb_dpk_), target :: work(:) type(psb_desc_type),target :: desc_a integer, optional :: data ! locals integer :: ictxt, np, me, icomm, idxs, idxr, totxch, data_, err_act integer, pointer :: d_idx(:) character(len=20) :: name info = 0 name='psi_swap_data' call psb_erractionsave(err_act) ictxt = psb_cd_get_context(desc_a) icomm = psb_cd_get_mpic(desc_a) call psb_info(ictxt,me,np) if (np == -1) then info = 2010 call psb_errpush(info,name) goto 9999 endif if (.not.psb_is_asb_desc(desc_a)) then info = 1122 call psb_errpush(info,name) goto 9999 endif if(present(data)) then data_ = data else data_ = psb_comm_halo_ end if call psb_cd_get_list(data_,desc_a,d_idx,totxch,idxr,idxs,info) if (info /= 0) then call psb_errpush(4001,name,a_err='psb_cd_get_list') goto 9999 end if call psi_swapdata(ictxt,icomm,flag,n,beta,y,d_idx,totxch,idxs,idxr,work,info) if (info /= 0) goto 9999 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psi_zswapdatam subroutine psi_zswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info) use psi_mod, psb_protect_name => psi_zswapidxm use psb_error_mod use psb_descriptor_type use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer, intent(in) :: ictxt,icomm,flag,n integer, intent(out) :: info complex(psb_dpk_) :: y(:,:), beta complex(psb_dpk_), target :: work(:) integer, intent(in) :: idx(:),totxch,totsnd, totrcv ! locals integer :: np, me, nesd, nerv,& & proc_to_comm, p2ptag, p2pstat(mpi_status_size),& & iret, err_act, i, idx_pt, totsnd_, totrcv_,& & snd_pt, rcv_pt, pnti, data_ integer, allocatable, dimension(:) :: bsdidx, brvidx,& & sdsz, rvsz, prcid, rvhd, sdhd integer :: int_err(5) logical :: swap_mpi, swap_sync, swap_send, swap_recv,& & albf,do_send,do_recv logical, parameter :: usersend=.false. complex(psb_dpk_), pointer, dimension(:) :: sndbuf, rcvbuf #ifdef HAVE_VOLATILE volatile :: sndbuf, rcvbuf #endif character(len=20) :: name info = 0 name='psi_swap_data' call psb_erractionsave(err_act) call psb_info(ictxt,me,np) if (np == -1) then info = 2010 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 /= 0) then call psb_errpush(4000,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_) call psb_get_rank(prcid(proc_to_comm),ictxt,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 /= 0) then call psb_errpush(4000,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 /= 0) then call psb_errpush(4000,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,& & mpi_double_complex,rcvbuf,rvsz,& & brvidx,mpi_double_complex,icomm,iret) if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) 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(ictxt,& & sndbuf(snd_pt:snd_pt+n*nesd-1), proc_to_comm) if (nerv>0) call psb_rcv(ictxt,& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1), proc_to_comm) else if (proc_to_comm > me) then if (nerv>0) call psb_rcv(ictxt,& & rcvbuf(rcv_pt:rcv_pt+n*nerv-1), proc_to_comm) if (nesd>0) call psb_snd(ictxt,& & sndbuf(snd_pt:snd_pt+n*nesd-1), proc_to_comm) else if (proc_to_comm == me) then if (nesd /= nerv) then write(0,*) 'Fatal error in swapdata: mismatch on self sendf',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_) call psb_get_rank(prcid(i),ictxt,proc_to_comm) if ((nerv>0).and.(proc_to_comm/=me)) then p2ptag = krecvid(ictxt,proc_to_comm,me) call mpi_irecv(rcvbuf(rcv_pt),n*nerv,& & mpi_double_complex,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,info) 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=ksendid(ictxt,proc_to_comm,me) if ((nesd>0).and.(proc_to_comm/=me)) then if (usersend) then call mpi_rsend(sndbuf(snd_pt),n*nesd,& & mpi_double_complex,prcid(i),& & p2ptag,icomm,iret) else call mpi_send(sndbuf(snd_pt),n*nesd,& & mpi_double_complex,prcid(i),& & p2ptag,icomm,iret) end if if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) 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 = krecvid(ictxt,proc_to_comm,me) if ((proc_to_comm /= me).and.(nerv>0)) then call mpi_wait(rvhd(i),p2pstat,iret) if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) goto 9999 end if else if (proc_to_comm == me) then if (nesd /= nerv) then write(0,*) 'Fatal error in swapdata: mismatch on self sendf',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(ictxt,& & 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(ictxt,& & 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 /= 0) then call psb_errpush(4000,name) goto 9999 end if if(albf) deallocate(sndbuf,rcvbuf,stat=info) if(info /= 0) then call psb_errpush(4000,name) goto 9999 end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psi_zswapidxm ! ! ! Subroutine: psi_zswapdatav ! Does 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 ! D real(psb_dpk_) ! 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. ! ! 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 - X Choose overwrite or sum. ! y(:) - X The data area ! desc_a - type(psb_desc_type). The communication descriptor. ! work(:) - X 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_zswapdatav(flag,beta,y,desc_a,work,info,data) use psi_mod, psb_protect_name => psi_zswapdatav use psb_error_mod use psb_descriptor_type use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer, intent(in) :: flag integer, intent(out) :: info complex(psb_dpk_) :: y(:), beta complex(psb_dpk_), target :: work(:) type(psb_desc_type),target :: desc_a integer, optional :: data ! locals integer :: ictxt, np, me, icomm, idxs, idxr, totxch, data_, err_act integer, pointer :: d_idx(:) character(len=20) :: name info = 0 name='psi_swap_datav' call psb_erractionsave(err_act) ictxt=psb_cd_get_context(desc_a) call psb_info(ictxt,me,np) if (np == -1) then info = 2010 call psb_errpush(info,name) goto 9999 endif if (.not.psb_is_asb_desc(desc_a)) then info = 1122 call psb_errpush(info,name) goto 9999 endif icomm = psb_cd_get_mpic(desc_a) if(present(data)) then data_ = data else data_ = psb_comm_halo_ end if call psb_cd_get_list(data_,desc_a,d_idx,totxch,idxr,idxs,info) if (info /= 0) then call psb_errpush(4001,name,a_err='psb_cd_get_list') goto 9999 end if call psi_swapdata(ictxt,icomm,flag,beta,y,d_idx,totxch,idxs,idxr,work,info) if (info /= 0) goto 9999 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psi_zswapdatav subroutine psi_zswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info) use psi_mod, psb_protect_name => psi_zswapidxv use psb_error_mod use psb_descriptor_type use psb_penv_mod #ifdef MPI_MOD use mpi #endif implicit none #ifdef MPI_H include 'mpif.h' #endif integer, intent(in) :: ictxt,icomm,flag integer, intent(out) :: info complex(psb_dpk_) :: y(:), beta complex(psb_dpk_), target :: work(:) integer, intent(in) :: idx(:),totxch,totsnd, totrcv ! locals integer :: np, me, nesd, nerv,& & proc_to_comm, p2ptag, p2pstat(mpi_status_size),& & iret, err_act, i, totsnd_, totrcv_,& & idx_pt, snd_pt, rcv_pt, n, pnti, data_ integer, allocatable, dimension(:) :: bsdidx, brvidx,& & sdsz, rvsz, prcid, rvhd, sdhd integer :: int_err(5) logical :: swap_mpi, swap_sync, swap_send, swap_recv,& & albf,do_send,do_recv logical, parameter :: usersend=.false. complex(psb_dpk_), pointer, dimension(:) :: sndbuf, rcvbuf #ifdef HAVE_VOLATILE volatile :: sndbuf, rcvbuf #endif character(len=20) :: name info = 0 name='psi_swap_datav' call psb_erractionsave(err_act) call psb_info(ictxt,me,np) if (np == -1) then info = 2010 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 /= 0) then call psb_errpush(4000,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_) call psb_get_rank(prcid(proc_to_comm),ictxt,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 /= 0) then call psb_errpush(4000,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 /= 0) then call psb_errpush(4000,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,& & mpi_double_complex,rcvbuf,rvsz,& & brvidx,mpi_double_complex,icomm,iret) if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) 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(ictxt,& & sndbuf(snd_pt:snd_pt+nesd-1), proc_to_comm) if (nerv>0) call psb_rcv(ictxt,& & rcvbuf(rcv_pt:rcv_pt+nerv-1), proc_to_comm) else if (proc_to_comm > me) then if (nerv>0) call psb_rcv(ictxt,& & rcvbuf(rcv_pt:rcv_pt+nerv-1), proc_to_comm) if (nesd>0) call psb_snd(ictxt,& & sndbuf(snd_pt:snd_pt+nesd-1), proc_to_comm) else if (proc_to_comm == me) then if (nesd /= nerv) then write(0,*) 'Fatal error in swapdata: mismatch on self sendf',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_) call psb_get_rank(prcid(i),ictxt,proc_to_comm) if ((nerv>0).and.(proc_to_comm /= me)) then p2ptag = krecvid(ictxt,proc_to_comm,me) call mpi_irecv(rcvbuf(rcv_pt),nerv,& & mpi_double_complex,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,info) 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=ksendid(ictxt,proc_to_comm,me) if ((nesd>0).and.(proc_to_comm /= me)) then if (usersend) then call mpi_rsend(sndbuf(snd_pt),nesd,& & mpi_double_complex,prcid(i),& & p2ptag,icomm,iret) else call mpi_send(sndbuf(snd_pt),nesd,& & mpi_double_complex,prcid(i),& & p2ptag,icomm,iret) end if if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) 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 = krecvid(ictxt,proc_to_comm,me) if ((proc_to_comm /= me).and.(nerv>0)) then call mpi_wait(rvhd(i),p2pstat,iret) if(iret /= mpi_success) then int_err(1) = iret info=400 call psb_errpush(info,name,i_err=int_err) goto 9999 end if else if (proc_to_comm == me) then if (nesd /= nerv) then write(0,*) 'Fatal error in swapdata: mismatch on self sendf',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(ictxt,& & 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(ictxt,& & 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 /= 0) then call psb_errpush(4000,name) goto 9999 end if if(albf) deallocate(sndbuf,rcvbuf,stat=info) if(info /= 0) then call psb_errpush(4000,name) goto 9999 end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psi_zswapidxv