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1140 lines
38 KiB
Fortran
1140 lines
38 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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!
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! File: psi_sswapdata.F90
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!
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!
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!
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! Subroutine: psi_sswapdata_vect
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! Implements the data exchange among processes. Essentially this is doing
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! a variable all-to-all data exchange (ALLTOALLV in MPI parlance), but
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! it is capable of pruning empty exchanges, which are very likely in out
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! application environment. All the variants have the same structure
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! In all these subroutines X may be: I Integer
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! S real(psb_spk_)
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! D real(psb_dpk_)
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! C complex(psb_spk_)
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! Z complex(psb_dpk_)
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! Basically the operation is as follows: on each process, we identify
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! sections SND(Y) and RCV(Y); then we do a SEND(PACK(GTH(SND(Y))));
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! then we receive, and we do an update with Y = SCT(RCV(Y)) + BETA * Y
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! but only on the elements involved in the SCT operation.
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! Thus: for halo data exchange, the receive section is confined in the
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! halo indices, and BETA=0, whereas for overlap exchange the receive section
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! is scattered in the owned indices, and BETA=1.
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! The first routine picks the desired exchange index list and passes it to the second.
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! This version works on encapsulated vectors, and uses their methods to do GTH and SCT,
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! so that special versions (i.e. GPU vectors can override them
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!
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! Arguments:
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! flag - integer Choose the algorithm for data exchange:
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! this is chosen through bit fields.
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! swap_mpi = iand(flag,psb_swap_mpi_) /= 0
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! swap_sync = iand(flag,psb_swap_sync_) /= 0
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! swap_send = iand(flag,psb_swap_send_) /= 0
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! swap_recv = iand(flag,psb_swap_recv_) /= 0
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! if (swap_mpi): use underlying MPI_ALLTOALLV.
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! if (swap_sync): use PSB_SND and PSB_RCV in
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! synchronized pairs
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! if (swap_send .and. swap_recv): use mpi_irecv
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! and mpi_send
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! if (swap_send): use psb_snd (but need another
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! call with swap_recv to complete)
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! if (swap_recv): use psb_rcv (completing a
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! previous call with swap_send)
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!
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!
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! n - integer Number of columns in Y
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! beta - real Choose overwrite or sum.
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! y - type(psb_@x@_vect_type) The data area
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! desc_a - type(psb_desc_type). The communication descriptor.
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! work(:) - real Buffer space. If not sufficient, will do
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! our own internal allocation.
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! info - integer. return code.
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! data - integer which list is to be used to exchange data
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! default psb_comm_halo_
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! psb_comm_halo_ use halo_index
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! psb_comm_ext_ use ext_index
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! psb_comm_ovrl_ use ovrl_index
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! psb_comm_mov_ use ovr_mst_idx
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!
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!
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!
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submodule (psi_s_comm_v_mod) psi_s_swapdata_impl
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use psb_desc_const_mod, only: psb_swap_start_, psb_swap_wait_
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use psb_base_mod
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contains
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module subroutine psi_sswapdata_vect(flag,beta,y,desc_a,work,info,data)
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#ifdef PSB_MPI_MOD
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use mpi
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#endif
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implicit none
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#ifdef PSB_MPI_H
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include 'mpif.h'
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#endif
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integer(psb_ipk_), intent(in) :: flag
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integer(psb_ipk_), intent(out) :: info
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class(psb_s_base_vect_type) :: y
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real(psb_spk_), intent(in) :: beta
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type(psb_desc_type), target :: desc_a
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real(psb_spk_), target :: work(:)
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integer(psb_ipk_), optional :: data
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! locals
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: np, me, total_send, total_recv, num_neighbors, data_, err_act
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class(psb_i_base_vect_type), pointer :: comm_indexes
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! local variables used to detect the communication scheme
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logical :: swap_mpi, swap_sync, swap_send, swap_recv, swap_start, swap_wait
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logical :: baseline, neighbor_a2av
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! error handling variables
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integer(psb_ipk_) :: err_act
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integer(psb_mpk_) :: me, np
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character(len=30) :: name
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info=psb_success_
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name='psi_sswapdata_vect'
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call psb_erractionsave(err_act)
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ctxt = desc_a%get_context()
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call psb_info(ctxt,me,np)
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if (np == -1) then
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info=psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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if (.not.psb_is_asb_desc(desc_a)) then
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info=psb_err_invalid_cd_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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if(present(data)) then
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data_ = data
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else
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data_ = psb_comm_halo_
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end if
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call desc_a%get_list_p(data_,d_vidx,totxch,idxr,idxs,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='psb_cd_get_list')
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goto 9999
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end if
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swap_mpi = iand(flag,psb_swap_mpi_) /= 0
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swap_sync = iand(flag,psb_swap_sync_) /= 0
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swap_send = iand(flag,psb_swap_send_) /= 0
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swap_recv = iand(flag,psb_swap_recv_) /= 0
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swap_start = iand(flag,psb_swap_start_) /= 0
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swap_wait = iand(flag,psb_swap_wait_) /= 0
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baseline = swap_mpi .or. swap_send .or. swap_recv .or. swap_sync
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neighbor_a2av = swap_start .or. swap_wait
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if( (baseline.eqv..true.).and.(neighbor_a2av.eqv..true.) ) then
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info = psb_err_mpi_error_
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call psb_errpush(info,name,a_err='Incompatible flag settings: both baseline and neighbor_a2av are true')
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goto 9999
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end if
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if (baseline) then
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call psi_dswap_baseline_vect(ctxt,flag,beta,y,comm_indexes,num_neighbors,total_send,total_recv,info)
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if (info /= psb_success_) then
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call psb_errpush(info,name,a_err='baseline swap')
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goto 9999
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end if
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else if (neighbor_a2av) then
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call psi_dswap_neighbor_topology_vect(ctxt,flag,beta,y,comm_indexes,num_neighbors,total_send,total_recv,info)
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if (info /= psb_success_) then
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call psb_errpush(info,name,a_err='neighbor a2av swap')
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goto 9999
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end if
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else
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info = psb_err_mpi_error_
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call psb_errpush(info,name,a_err='Incompatible flag settings: neither baseline nor neighbor_a2av is true')
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goto 9999
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psi_sswapdata_vect
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!
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! subroutine psi_sswap_baseline_vect
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! This performs Isend/Irecv as a baseline communication mode
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!
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subroutine psi_sswap_baseline_vect(ctxt,icomm,flag,beta,y,idx, &
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& totxch,totsnd,totrcv,work,info)
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#ifdef PSB_MPI_MOD
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use mpi
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#endif
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implicit none
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#ifdef PSB_MPI_H
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include 'mpif.h'
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#endif
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type(psb_ctxt_type), intent(in) :: ctxt
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integer(psb_ipk_), intent(in) :: flag
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integer(psb_ipk_), intent(out) :: info
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class(psb_s_base_vect_type) :: y
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real(psb_spk_) :: beta
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real(psb_spk_), target :: work(:)
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class(psb_i_base_vect_type), intent(inout) :: idx
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integer(psb_ipk_), intent(in) :: totxch,totsnd, totrcv
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! locals
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integer(psb_mpk_) :: np, me
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integer(psb_mpk_) :: proc_to_comm, p2ptag, p2pstat(mpi_status_size),&
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& iret, nesd, nerv
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integer(psb_mpk_) :: icomm
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integer(psb_mpk_), allocatable :: prcid(:)
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integer(psb_ipk_) :: err_act, i, idx_pt, totsnd_, totrcv_,&
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& snd_pt, rcv_pt, pnti, n
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logical :: swap_mpi, swap_sync, swap_send, swap_recv,&
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& albf,do_send,do_recv
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logical, parameter :: usersend=.false., debug=.false.
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character(len=20) :: name
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info=psb_success_
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name='psi_swap_datav'
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call psb_erractionsave(err_act)
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call psb_info(ctxt,me,np)
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if (np == -1) then
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info=psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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icomm = ctxt%get_mpic()
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n=1
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swap_mpi = iand(flag,psb_swap_mpi_) /= 0
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swap_sync = iand(flag,psb_swap_sync_) /= 0
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swap_send = iand(flag,psb_swap_send_) /= 0
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swap_recv = iand(flag,psb_swap_recv_) /= 0
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do_send = swap_mpi .or. swap_sync .or. swap_send
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do_recv = swap_mpi .or. swap_sync .or. swap_recv
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totrcv_ = totrcv * n
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totsnd_ = totsnd * n
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call idx%sync()
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if (debug) write(*,*) me,'Internal buffer'
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if (do_send) then
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if (allocated(y%comid)) then
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if (any(y%comid /= mpi_request_null)) then
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!
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! Unfinished communication? Something is wrong....
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!
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info=psb_err_mpi_error_
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call psb_errpush(info,name,m_err=(/-2/))
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goto 9999
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end if
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end if
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if (debug) write(*,*) me,'do_send start'
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call y%new_buffer(ione*size(idx%v),info)
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call y%new_comid(totxch,info)
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y%comid = mpi_request_null
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call psb_realloc(totxch,prcid,info)
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! First I post all the non blocking receives
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pnti = 1
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do i=1, totxch
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proc_to_comm = idx%v(pnti+psb_proc_id_)
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nerv = idx%v(pnti+psb_n_elem_recv_)
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nesd = idx%v(pnti+nerv+psb_n_elem_send_)
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rcv_pt = 1+pnti+psb_n_elem_recv_
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prcid(i) = psb_get_mpi_rank(ctxt,proc_to_comm)
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if ((nerv>0).and.(proc_to_comm /= me)) then
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if (debug) write(*,*) me,'Posting receive from',prcid(i),rcv_pt
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p2ptag = psb_real_swap_tag
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call mpi_irecv(y%combuf(rcv_pt),nerv,&
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& psb_mpi_r_spk_,prcid(i),&
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& p2ptag, icomm,y%comid(i,2),iret)
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end if
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pnti = pnti + nerv + nesd + 3
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end do
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if (debug) write(*,*) me,' Gather '
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!
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! Then gather for sending.
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!
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pnti = 1
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do i=1, totxch
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nerv = idx%v(pnti+psb_n_elem_recv_)
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nesd = idx%v(pnti+nerv+psb_n_elem_send_)
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snd_pt = 1+pnti+nerv+psb_n_elem_send_
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rcv_pt = 1+pnti+psb_n_elem_recv_
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idx_pt = snd_pt
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call y%gth(idx_pt,nesd,idx)
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pnti = pnti + nerv + nesd + 3
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end do
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!
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! Then wait
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!
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call y%device_wait()
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|
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if (debug) write(*,*) me,' isend'
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!
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! Then send
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!
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pnti = 1
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snd_pt = 1
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rcv_pt = 1
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p2ptag = psb_real_swap_tag
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do i=1, totxch
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proc_to_comm = idx%v(pnti+psb_proc_id_)
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nerv = idx%v(pnti+psb_n_elem_recv_)
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nesd = idx%v(pnti+nerv+psb_n_elem_send_)
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snd_pt = 1+pnti+nerv+psb_n_elem_send_
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rcv_pt = 1+pnti+psb_n_elem_recv_
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|
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if ((nesd>0).and.(proc_to_comm /= me)) then
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call mpi_isend(y%combuf(snd_pt),nesd,&
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& psb_mpi_r_spk_,prcid(i),&
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& p2ptag,icomm,y%comid(i,1),iret)
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end if
|
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|
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if(iret /= mpi_success) then
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info=psb_err_mpi_error_
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call psb_errpush(info,name,m_err=(/iret/))
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goto 9999
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end if
|
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|
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pnti = pnti + nerv + nesd + 3
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end do
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end if
|
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|
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if (do_recv) then
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if (debug) write(*,*) me,' do_Recv'
|
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if (.not.allocated(y%comid)) then
|
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!
|
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! No matching send? Something is wrong....
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!
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info=psb_err_mpi_error_
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call psb_errpush(info,name,m_err=(/-2/))
|
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goto 9999
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end if
|
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call psb_realloc(totxch,prcid,info)
|
|
|
|
if (debug) write(*,*) me,' wait'
|
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pnti = 1
|
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p2ptag = psb_real_swap_tag
|
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do i=1, totxch
|
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proc_to_comm = idx%v(pnti+psb_proc_id_)
|
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nerv = idx%v(pnti+psb_n_elem_recv_)
|
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nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
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snd_pt = 1+pnti+nerv+psb_n_elem_send_
|
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rcv_pt = 1+pnti+psb_n_elem_recv_
|
|
|
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if (proc_to_comm /= me)then
|
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if (nesd>0) then
|
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call mpi_wait(y%comid(i,1),p2pstat,iret)
|
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if(iret /= mpi_success) then
|
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info=psb_err_mpi_error_
|
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call psb_errpush(info,name,m_err=(/iret/))
|
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goto 9999
|
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end if
|
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end if
|
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if (nerv>0) then
|
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call mpi_wait(y%comid(i,2),p2pstat,iret)
|
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if(iret /= mpi_success) then
|
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info=psb_err_mpi_error_
|
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call psb_errpush(info,name,m_err=(/iret/))
|
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goto 9999
|
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end if
|
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end if
|
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else if (proc_to_comm == me) then
|
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if (nesd /= nerv) then
|
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write(psb_err_unit,*) &
|
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& 'Fatal error in swapdata: mismatch on self send',&
|
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& nerv,nesd
|
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end if
|
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y%combuf(rcv_pt:rcv_pt+nerv-1) = y%combuf(snd_pt:snd_pt+nesd-1)
|
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end if
|
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pnti = pnti + nerv + nesd + 3
|
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end do
|
|
|
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if (debug) write(*,*) me,' scatter'
|
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pnti = 1
|
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snd_pt = 1
|
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rcv_pt = 1
|
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do i=1, totxch
|
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proc_to_comm = idx%v(pnti+psb_proc_id_)
|
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nerv = idx%v(pnti+psb_n_elem_recv_)
|
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nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
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idx_pt = 1+pnti+psb_n_elem_recv_
|
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snd_pt = 1+pnti+nerv+psb_n_elem_send_
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rcv_pt = 1+pnti+psb_n_elem_recv_
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|
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if (debug) write(0,*)me,' Received from: ',prcid(i),&
|
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& y%combuf(rcv_pt:rcv_pt+nerv-1)
|
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call y%sct(rcv_pt,nerv,idx,beta)
|
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pnti = pnti + nerv + nesd + 3
|
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end do
|
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!
|
|
! Waited for everybody, clean up
|
|
!
|
|
y%comid = mpi_request_null
|
|
|
|
!
|
|
! Then wait for device
|
|
!
|
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if (debug) write(*,*) me,' wait'
|
|
call y%device_wait()
|
|
if (debug) write(*,*) me,' free buffer'
|
|
call y%maybe_free_buffer(info)
|
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if (info == 0) call y%free_comid(info)
|
|
if (info /= 0) then
|
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call psb_errpush(psb_err_alloc_dealloc_,name)
|
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goto 9999
|
|
end if
|
|
if (debug) write(*,*) me,' done'
|
|
end if
|
|
|
|
|
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call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
|
|
end subroutine psi_sswap_baseline_vect
|
|
|
|
|
|
subroutine psi_sswap_neighbor_topology_vect(ctxt,icomm,flag,beta,y,idx, &
|
|
& totxch,totsnd,totrcv,work,info)
|
|
|
|
#ifdef PSB_MPI_MOD
|
|
use mpi
|
|
#endif
|
|
implicit none
|
|
#ifdef PSB_MPI_H
|
|
include 'mpif.h'
|
|
#endif
|
|
|
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type(psb_ctxt_type), intent(in) :: ctxt
|
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integer(psb_mpk_), intent(in) :: icomm
|
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integer(psb_ipk_), intent(in) :: flag
|
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integer(psb_ipk_), intent(out) :: info
|
|
class(psb_s_base_vect_type) :: y
|
|
real(psb_spk_), intent(in) :: beta
|
|
real(psb_spk_), target :: work(:)
|
|
class(psb_i_base_vect_type), intent(inout) :: idx
|
|
integer(psb_ipk_), intent(in) :: totxch,totsnd, totrcv
|
|
|
|
! locals
|
|
integer(psb_mpk_) :: np, me
|
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integer(psb_mpk_) :: iret, p2pstat(mpi_status_size)
|
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integer(psb_ipk_) :: err_act, topology_total_send, topology_total_recv, buffer_size
|
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logical :: do_start, do_wait
|
|
logical, parameter :: debug = .false.
|
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character(len=30) :: name
|
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|
|
|
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info = psb_success_
|
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name = 'psi_sswap_nbr_vect'
|
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call psb_erractionsave(err_act)
|
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call psb_info(ctxt,me,np)
|
|
if (np == -1) then
|
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info=psb_err_context_error_
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call psb_errpush(info,name)
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|
goto 9999
|
|
endif
|
|
|
|
do_start = iand(flag,psb_swap_start_) /= 0
|
|
do_wait = iand(flag,psb_swap_wait_) /= 0
|
|
|
|
call idx%sync()
|
|
|
|
! ---------------------------------------------------------
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! START phase: build topology (if needed), gather, post MPI
|
|
! ---------------------------------------------------------
|
|
if (do_start) then
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|
if(debug) write(*,*) me,' nbr_vect: starting data exchange'
|
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! Lazy initialization: build the topology on first call
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if (.not. y%neighbor_topology%is_initialized) then
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if (debug) write(*,*) me,' nbr_vect: building topology'
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|
call y%neighbor_topology%init(idx%v, totxch, totsnd, totrcv, &
|
|
& ctxt, icomm, info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_internal_error_, name, &
|
|
& a_err='neighbor_topology_init')
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
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topology_total_send = y%neighbor_topology%total_send
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topology_total_recv = y%neighbor_topology%total_recv
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|
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! Buffer layout:
|
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! combuf(1 : total_send) = send area
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! combuf(total_send+1 : total_send+total_recv) = recv area
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buffer_size = topology_total_send + topology_total_recv
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|
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call y%new_buffer(buffer_size, info)
|
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if (info /= 0) then
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call psb_errpush(psb_err_alloc_dealloc_, name)
|
|
goto 9999
|
|
end if
|
|
y%communication_handle = mpi_request_null
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|
|
|
! Gather send data into contiguous send buffer (polymorphic for GPU)
|
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if (debug) write(*,*) me,' nbr_vect: gathering send data,', topology_total_send,' elems'
|
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call y%gth(int(topology_total_send,psb_mpk_), &
|
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& y%neighbor_topology%send_indexes, &
|
|
& y%combuf(1:topology_total_send))
|
|
|
|
! Wait for device (important for GPU subclasses)
|
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call y%device_wait()
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|
|
! Post non-blocking neighborhood alltoallv
|
|
if (debug) write(*,*) me,' nbr_vect: posting MPI_Ineighbor_alltoallv'
|
|
call mpi_ineighbor_alltoallv( &
|
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& y%combuf(1), & ! send buffer
|
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& y%neighbor_topology%send_counts, &
|
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& y%neighbor_topology%send_displs, &
|
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& psb_mpi_r_spk_, &
|
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& y%combuf(topology_total_send + 1), & ! recv buffer
|
|
& y%neighbor_topology%recv_counts, &
|
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& y%neighbor_topology%recv_displs, &
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& psb_mpi_r_spk_, &
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|
& y%neighbor_topology%graph_comm, &
|
|
& y%communication_handle, iret)
|
|
if (iret /= mpi_success) then
|
|
info = psb_err_mpi_error_
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|
call psb_errpush(info, name, m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
|
|
end if ! do_start
|
|
|
|
! ---------------------------------------------------------
|
|
! WAIT phase: complete MPI, scatter received data
|
|
! ---------------------------------------------------------
|
|
if (do_wait) then
|
|
|
|
if (y%communication_handle == mpi_request_null) then
|
|
! No matching start? Something is wrong
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info, name, m_err=(/-2/))
|
|
goto 9999
|
|
end if
|
|
|
|
topology_total_send = y%neighbor_topology%total_send
|
|
topology_total_recv = y%neighbor_topology%total_recv
|
|
|
|
! Wait for the non-blocking collective to complete
|
|
if (debug) write(*,*) me,' nbr_vect: waiting on MPI request'
|
|
call mpi_wait(y%communication_handle, p2pstat, iret)
|
|
if (iret /= mpi_success) then
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info, name, m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
|
|
! Scatter received data to local vector positions (polymorphic for GPU)
|
|
if (debug) write(*,*) me,' nbr_vect: scattering recv data,', topology_total_recv,' elems'
|
|
call y%sct(int(topology_total_recv,psb_mpk_), &
|
|
& y%neighbor_topology%recv_indexes, &
|
|
& y%combuf(topology_total_send+1:topology_total_send+topology_total_recv), &
|
|
& beta)
|
|
|
|
|
|
! Clean up
|
|
y%communication_handle = mpi_request_null
|
|
call y%device_wait()
|
|
call y%maybe_free_buffer(info)
|
|
if (info /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_, name)
|
|
goto 9999
|
|
end if
|
|
if (debug) write(*,*) me,' nbr_vect: done'
|
|
|
|
end if ! do_wait
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
end subroutine psi_sswap_neighbor_topology_vect
|
|
|
|
|
|
|
|
|
|
!
|
|
!
|
|
! Subroutine: psi_sswapdata_multivect
|
|
! Data exchange among processes.
|
|
!
|
|
! Takes care of Y an encaspulated multivector.
|
|
!
|
|
!
|
|
module subroutine psi_sswapdata_multivect(flag,beta,y,desc_a,work,info,data)
|
|
#ifdef PSB_MPI_MOD
|
|
use mpi
|
|
#endif
|
|
implicit none
|
|
#ifdef PSB_MPI_H
|
|
include 'mpif.h'
|
|
#endif
|
|
|
|
integer(psb_ipk_), intent(in) :: flag
|
|
integer(psb_ipk_), intent(out) :: info
|
|
class(psb_s_base_multivect_type) :: y
|
|
real(psb_spk_), intent(in) :: beta
|
|
type(psb_desc_type), target :: desc_a
|
|
real(psb_spk_), target :: work(:)
|
|
integer(psb_ipk_), optional :: data
|
|
|
|
! locals
|
|
type(psb_ctxt_type) :: ctxt
|
|
integer(psb_ipk_) :: np, me, total_send, total_recv, num_neighbors, data_, err_act
|
|
class(psb_i_base_vect_type), pointer :: comm_indexes
|
|
character(len=30) :: name
|
|
|
|
! local variables used to detect the communication scheme
|
|
logical :: swap_mpi, swap_sync, swap_send, swap_recv, swap_start, swap_wait
|
|
logical :: baseline, neighbor_a2av
|
|
|
|
|
|
info=psb_success_
|
|
name='psi_sswapdata_multivect'
|
|
call psb_erractionsave(err_act)
|
|
|
|
ctxt = desc_a%get_context()
|
|
|
|
|
|
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_p(data_,d_vidx,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
|
|
|
|
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
|
|
swap_start = iand(flag,psb_swap_start_) /= 0
|
|
swap_wait = iand(flag,psb_swap_wait_) /= 0
|
|
|
|
baseline = swap_mpi .or. swap_send .or. swap_recv .or. swap_sync
|
|
neighbor_a2av = swap_start .or. swap_wait
|
|
|
|
icomm = ctxt%get_mpic()
|
|
|
|
if( (baseline.eqv..true.).and.(neighbor_a2av.eqv..true.) ) then
|
|
info=psb_err_mpi_error_
|
|
call psb_errpush(info,name,a_err='Incompatible flag settings: both baseline and neighbor_a2av are true')
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
if (baseline) then
|
|
call psi_dswap_baseline_multivect(ctxt,flag,beta,y,comm_indexes,num_neighbors,total_send,total_recv,info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(info,name,a_err='baseline swap')
|
|
goto 9999
|
|
end if
|
|
else if (neighbor_a2av) then
|
|
call psi_dswap_neighbor_topology_multivect(ctxt,flag,beta,y,comm_indexes,num_neighbors,total_send,total_recv,info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(info,name,a_err='neighbor a2av swap')
|
|
goto 9999
|
|
end if
|
|
else
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info,name,a_err='Incompatible flag settings: neither baseline nor neighbor_a2av is true')
|
|
goto 9999
|
|
end if
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
end subroutine psi_sswapdata_multivect
|
|
|
|
|
|
|
|
|
|
|
|
|
|
subroutine psi_sswap_baseline_multivect(ctxt,icomm,flag,beta,y,idx, &
|
|
& totxch,totsnd,totrcv,work,info)
|
|
|
|
#ifdef PSB_MPI_MOD
|
|
use mpi
|
|
#endif
|
|
implicit none
|
|
#ifdef PSB_MPI_H
|
|
include 'mpif.h'
|
|
#endif
|
|
|
|
type(psb_ctxt_type), intent(in) :: ctxt
|
|
integer(psb_ipk_), intent(in) :: flag
|
|
integer(psb_ipk_), intent(out) :: info
|
|
class(psb_s_base_multivect_type) :: y
|
|
real(psb_spk_) :: beta
|
|
real(psb_spk_), target :: work(:)
|
|
class(psb_i_base_vect_type), intent(inout) :: idx
|
|
integer(psb_ipk_), intent(in) :: totxch,totsnd, totrcv
|
|
|
|
! locals
|
|
integer(psb_mpk_) :: np, me, nesd, nerv, n
|
|
integer(psb_mpk_) :: proc_to_comm, p2ptag, p2pstat(mpi_status_size), iret
|
|
integer(psb_mpk_) :: icomm
|
|
integer(psb_mpk_), allocatable :: prcid(:)
|
|
integer(psb_ipk_) :: 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., debug=.false.
|
|
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
|
|
icomm = ctxt%get_mpic()
|
|
|
|
n = y%get_ncols()
|
|
|
|
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
|
|
|
|
call idx%sync()
|
|
|
|
if (debug) write(*,*) me,'Internal buffer'
|
|
if (do_send) then
|
|
if (allocated(y%comid)) then
|
|
if (any(y%comid /= mpi_request_null)) then
|
|
!
|
|
! Unfinished communication? Something is wrong....
|
|
!
|
|
info=psb_err_mpi_error_
|
|
call psb_errpush(info,name,m_err=(/-2/))
|
|
goto 9999
|
|
end if
|
|
end if
|
|
if (debug) write(*,*) me,'do_send start'
|
|
call y%new_buffer(ione*size(idx%v),info)
|
|
call y%new_comid(totxch,info)
|
|
y%comid = mpi_request_null
|
|
call psb_realloc(totxch,prcid,info)
|
|
! First I post all the non blocking receives
|
|
pnti = 1
|
|
snd_pt = totrcv_+1
|
|
rcv_pt = 1
|
|
do i=1, totxch
|
|
proc_to_comm = idx%v(pnti+psb_proc_id_)
|
|
nerv = idx%v(pnti+psb_n_elem_recv_)
|
|
nesd = idx%v(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
|
|
if (debug) write(*,*) me,'Posting receive from',prcid(i),rcv_pt
|
|
p2ptag = psb_real_swap_tag
|
|
call mpi_irecv(y%combuf(rcv_pt),n*nerv,&
|
|
& psb_mpi_r_spk_,prcid(i),&
|
|
& p2ptag, icomm,y%comid(i,2),iret)
|
|
end if
|
|
rcv_pt = rcv_pt + n*nerv
|
|
snd_pt = snd_pt + n*nesd
|
|
pnti = pnti + nerv + nesd + 3
|
|
end do
|
|
if (debug) write(*,*) me,' Gather '
|
|
!
|
|
! Then gather for sending.
|
|
!
|
|
pnti = 1
|
|
snd_pt = totrcv_+1
|
|
rcv_pt = 1
|
|
do i=1, totxch
|
|
nerv = idx%v(pnti+psb_n_elem_recv_)
|
|
nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
|
idx_pt = 1+pnti+nerv+psb_n_elem_send_
|
|
call y%gth(idx_pt,snd_pt,nesd,idx)
|
|
rcv_pt = rcv_pt + n*nerv
|
|
snd_pt = snd_pt + n*nesd
|
|
pnti = pnti + nerv + nesd + 3
|
|
end do
|
|
|
|
!
|
|
! Then wait for device
|
|
!
|
|
call y%device_wait()
|
|
|
|
if (debug) write(*,*) me,' isend'
|
|
!
|
|
! Then send
|
|
!
|
|
|
|
pnti = 1
|
|
snd_pt = totrcv_+1
|
|
rcv_pt = 1
|
|
p2ptag = psb_real_swap_tag
|
|
do i=1, totxch
|
|
proc_to_comm = idx%v(pnti+psb_proc_id_)
|
|
nerv = idx%v(pnti+psb_n_elem_recv_)
|
|
nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
|
|
|
if ((nesd>0).and.(proc_to_comm /= me)) then
|
|
call mpi_isend(y%combuf(snd_pt),n*nesd,&
|
|
& psb_mpi_r_spk_,prcid(i),&
|
|
& p2ptag,icomm,y%comid(i,1),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
|
|
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
|
|
if (debug) write(*,*) me,' do_Recv'
|
|
if (.not.allocated(y%comid)) then
|
|
!
|
|
! No matching send? Something is wrong....
|
|
!
|
|
info=psb_err_mpi_error_
|
|
call psb_errpush(info,name,m_err=(/-2/))
|
|
goto 9999
|
|
end if
|
|
call psb_realloc(totxch,prcid,info)
|
|
|
|
if (debug) write(*,*) me,' wait'
|
|
pnti = 1
|
|
snd_pt = totrcv_+1
|
|
rcv_pt = 1
|
|
p2ptag = psb_real_swap_tag
|
|
do i=1, totxch
|
|
proc_to_comm = idx%v(pnti+psb_proc_id_)
|
|
nerv = idx%v(pnti+psb_n_elem_recv_)
|
|
nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
|
if (proc_to_comm /= me)then
|
|
if (nesd>0) then
|
|
call mpi_wait(y%comid(i,1),p2pstat,iret)
|
|
if(iret /= mpi_success) then
|
|
info=psb_err_mpi_error_
|
|
call psb_errpush(info,name,m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
end if
|
|
if (nerv>0) then
|
|
call mpi_wait(y%comid(i,2),p2pstat,iret)
|
|
if(iret /= mpi_success) then
|
|
info=psb_err_mpi_error_
|
|
call psb_errpush(info,name,m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
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
|
|
y%combuf(rcv_pt:rcv_pt+n*nerv-1) = y%combuf(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
|
|
|
|
if (debug) write(*,*) me,' scatter'
|
|
pnti = 1
|
|
snd_pt = totrcv_+1
|
|
rcv_pt = 1
|
|
do i=1, totxch
|
|
proc_to_comm = idx%v(pnti+psb_proc_id_)
|
|
nerv = idx%v(pnti+psb_n_elem_recv_)
|
|
nesd = idx%v(pnti+nerv+psb_n_elem_send_)
|
|
idx_pt = 1+pnti+psb_n_elem_recv_
|
|
|
|
if (debug) write(0,*)me,' Received from: ',prcid(i),&
|
|
& y%combuf(rcv_pt:rcv_pt+n*nerv-1)
|
|
call y%sct(idx_pt,rcv_pt,nerv,idx,beta)
|
|
rcv_pt = rcv_pt + n*nerv
|
|
snd_pt = snd_pt + n*nesd
|
|
pnti = pnti + nerv + nesd + 3
|
|
end do
|
|
!
|
|
! Waited for com, cleanup comid
|
|
!
|
|
y%comid = mpi_request_null
|
|
|
|
!
|
|
! Then wait for device
|
|
!
|
|
if (debug) write(*,*) me,' wait'
|
|
call y%device_wait()
|
|
if (debug) write(*,*) me,' free buffer'
|
|
call y%free_buffer(info)
|
|
if (info == 0) call y%free_comid(info)
|
|
if (info /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_,name)
|
|
goto 9999
|
|
end if
|
|
if (debug) write(*,*) me,' done'
|
|
end if
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
end subroutine psi_sswap_baseline_multivect
|
|
|
|
|
|
subroutine psi_sswap_neighbor_topology_multivect(ctxt,icomm,flag,beta,y,idx, &
|
|
& totxch,totsnd,totrcv,work,info)
|
|
|
|
#ifdef PSB_MPI_MOD
|
|
use mpi
|
|
#endif
|
|
implicit none
|
|
#ifdef PSB_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
|
|
class(psb_s_base_multivect_type) :: y
|
|
real(psb_spk_), intent(in) :: beta
|
|
real(psb_spk_), target :: work(:)
|
|
class(psb_i_base_vect_type), intent(inout) :: idx
|
|
integer(psb_ipk_), intent(in) :: totxch,totsnd, totrcv
|
|
|
|
! locals
|
|
integer(psb_mpk_) :: np, me
|
|
integer(psb_mpk_) :: iret, p2pstat(mpi_status_size)
|
|
integer(psb_ipk_) :: err_act, topology_total_send, topology_total_recv, buffer_size
|
|
logical :: do_start, do_wait
|
|
logical, parameter :: debug = .false.
|
|
character(len=30) :: name
|
|
|
|
|
|
info = psb_success_
|
|
name = 'psi_sswap_nbr_vect'
|
|
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
|
|
|
|
do_start = iand(flag,psb_swap_start_) /= 0
|
|
do_wait = iand(flag,psb_swap_wait_) /= 0
|
|
|
|
call idx%sync()
|
|
|
|
! ---------------------------------------------------------
|
|
! START phase: build topology (if needed), gather, post MPI
|
|
! ---------------------------------------------------------
|
|
if (do_start) then
|
|
if(debug) write(*,*) me,' nbr_vect: starting data exchange'
|
|
! Lazy initialization: build the topology on first call
|
|
if (.not. y%neighbor_topology%is_initialized) then
|
|
if (debug) write(*,*) me,' nbr_vect: building topology'
|
|
call y%neighbor_topology%init(idx%v, totxch, totsnd, totrcv, &
|
|
& ctxt, icomm, info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_internal_error_, name, &
|
|
& a_err='neighbor_topology_init')
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
|
topology_total_send = y%neighbor_topology%total_send
|
|
topology_total_recv = y%neighbor_topology%total_recv
|
|
|
|
! Buffer layout:
|
|
! combuf(1 : total_send) = send area
|
|
! combuf(total_send+1 : total_send+total_recv) = recv area
|
|
buffer_size = topology_total_send + topology_total_recv
|
|
|
|
call y%new_buffer(buffer_size, info)
|
|
if (info /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_, name)
|
|
goto 9999
|
|
end if
|
|
y%communication_handle = mpi_request_null
|
|
|
|
! Gather send data into contiguous send buffer (polymorphic for GPU)
|
|
if (debug) write(*,*) me,' nbr_vect: gathering send data,', topology_total_send,' elems'
|
|
call y%gth(int(topology_total_send,psb_mpk_), &
|
|
& y%neighbor_topology%send_indexes, &
|
|
& y%combuf(1:topology_total_send))
|
|
|
|
! Wait for device (important for GPU subclasses)
|
|
call y%device_wait()
|
|
|
|
! Post non-blocking neighborhood alltoallv
|
|
if (debug) write(*,*) me,' nbr_vect: posting MPI_Ineighbor_alltoallv'
|
|
call mpi_ineighbor_alltoallv( &
|
|
& y%combuf(1), & ! send buffer
|
|
& y%neighbor_topology%send_counts, &
|
|
& y%neighbor_topology%send_displs, &
|
|
& psb_mpi_r_spk_, &
|
|
& y%combuf(topology_total_send + 1), & ! recv buffer
|
|
& y%neighbor_topology%recv_counts, &
|
|
& y%neighbor_topology%recv_displs, &
|
|
& psb_mpi_r_spk_, &
|
|
& y%neighbor_topology%graph_comm, &
|
|
& y%communication_handle, iret)
|
|
if (iret /= mpi_success) then
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info, name, m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
|
|
end if ! do_start
|
|
|
|
! ---------------------------------------------------------
|
|
! WAIT phase: complete MPI, scatter received data
|
|
! ---------------------------------------------------------
|
|
if (do_wait) then
|
|
|
|
if (y%communication_handle == mpi_request_null) then
|
|
! No matching start? Something is wrong
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info, name, m_err=(/-2/))
|
|
goto 9999
|
|
end if
|
|
|
|
topology_total_send = y%neighbor_topology%total_send
|
|
topology_total_recv = y%neighbor_topology%total_recv
|
|
|
|
! Wait for the non-blocking collective to complete
|
|
if (debug) write(*,*) me,' nbr_vect: waiting on MPI request'
|
|
call mpi_wait(y%communication_handle, p2pstat, iret)
|
|
if (iret /= mpi_success) then
|
|
info = psb_err_mpi_error_
|
|
call psb_errpush(info, name, m_err=(/iret/))
|
|
goto 9999
|
|
end if
|
|
|
|
! Scatter received data to local vector positions (polymorphic for GPU)
|
|
if (debug) write(*,*) me,' nbr_vect: scattering recv data,', topology_total_recv,' elems'
|
|
call y%sct(int(topology_total_recv,psb_mpk_), &
|
|
& y%neighbor_topology%recv_indexes, &
|
|
& y%combuf(topology_total_send+1:topology_total_send+topology_total_recv), &
|
|
& beta)
|
|
|
|
|
|
! Clean up
|
|
y%communication_handle = mpi_request_null
|
|
call y%device_wait()
|
|
call y%maybe_free_buffer(info)
|
|
if (info /= 0) then
|
|
call psb_errpush(psb_err_alloc_dealloc_, name)
|
|
goto 9999
|
|
end if
|
|
if (debug) write(*,*) me,' nbr_vect: done'
|
|
|
|
end if ! do_wait
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
end subroutine psi_sswap_neighbor_topology_multivect
|
|
|
|
|
|
end submodule psi_s_swapdata_impl
|
|
|