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psblas3/base/comm/internals/psi_i2swapdata_a.F90

987 lines
30 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions
! are met:
! 1. Redistributions of source code must retain the above copyright
! notice, this list of conditions and the following disclaimer.
! 2. Redistributions in binary form must reproduce the above copyright
! notice, this list of conditions, and the following disclaimer in the
! documentation and/or other materials provided with the distribution.
! 3. The name of the PSBLAS group or the names of its contributors may
! not be used to endorse or promote products derived from this
! software without specific written permission.
!
! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! POSSIBILITY OF SUCH DAMAGE.
!
!
!
! File: psi_i2swapdata.F90
!
! Subroutine: psi_i2swapdatam
! 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 - integer Choose overwrite or sum.
! y(:,:) - integer The data area
! desc_a - type(psb_desc_type). The communication descriptor.
! work(:) - integer 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_i2swapdatam(flag,n,beta,y,desc_a,work,info,data)
use psi_mod, psb_protect_name => psi_i2swapdatam
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
integer(psb_i2pk_) :: y(:,:), beta
integer(psb_i2pk_), target :: work(:)
type(psb_desc_type),target :: desc_a
integer(psb_ipk_), optional :: data
! locals
integer(psb_ipk_) :: ictxt, np, me, icomm, 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)
ictxt = desc_a%get_context()
icomm = desc_a%get_mpic()
call psb_info(ictxt,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(ictxt,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(ictxt,err_act)
return
end subroutine psi_i2swapdatam
subroutine psi_i2swapidxm(iictxt,iicomm,flag,n,beta,y,idx, &
& totxch,totsnd,totrcv,work,info)
use psi_mod, psb_protect_name => psi_i2swapidxm
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) :: iictxt,iicomm,flag,n
integer(psb_ipk_), intent(out) :: info
integer(psb_i2pk_) :: y(:,:), beta
integer(psb_i2pk_), target :: work(:)
integer(psb_ipk_), intent(in) :: idx(:),totxch,totsnd, totrcv
! locals
integer(psb_mpk_) :: ictxt, icomm, 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.
integer(psb_i2pk_), pointer, dimension(:) :: sndbuf, rcvbuf
volatile :: sndbuf, rcvbuf
character(len=20) :: name
info=psb_success_
name='psi_swap_data'
call psb_erractionsave(err_act)
ictxt = iictxt
icomm = iicomm
call psb_info(ictxt,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(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 /= 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_i2pk_,rcvbuf,rvsz,&
& brvidx,psb_mpi_i2pk_,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(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(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(ictxt,proc_to_comm)
if ((nerv>0).and.(proc_to_comm /= me)) then
p2ptag = psb_int2_swap_tag
call mpi_irecv(rcvbuf(rcv_pt),n*nerv,&
& psb_mpi_i2pk_,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_int2_swap_tag
if ((nesd>0).and.(proc_to_comm /= me)) then
if (usersend) then
call mpi_rsend(sndbuf(snd_pt),n*nesd,&
& psb_mpi_i2pk_,prcid(i),&
& p2ptag,icomm,iret)
else
call mpi_send(sndbuf(snd_pt),n*nesd,&
& psb_mpi_i2pk_,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_int2_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(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 /= 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(iictxt,err_act)
return
end subroutine psi_i2swapidxm
!
!
! Subroutine: psi_i2swapdatav
! 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 - integer Choose overwrite or sum.
! y(:) - integer The data area
! desc_a - type(psb_desc_type). The communication descriptor.
! work(:) - integer 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_i2swapdatav(flag,beta,y,desc_a,work,info,data)
use psi_mod, psb_protect_name => psi_i2swapdatav
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
integer(psb_i2pk_) :: y(:), beta
integer(psb_i2pk_), target :: work(:)
type(psb_desc_type),target :: desc_a
integer(psb_ipk_), optional :: data
! locals
integer(psb_ipk_) :: ictxt, np, me, icomm, 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)
ictxt = desc_a%get_context()
icomm = desc_a%get_mpic()
call psb_info(ictxt,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(ictxt,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(ictxt,err_act)
return
end subroutine psi_i2swapdatav
!
!
! Subroutine: psi_i2swapdataidxv
! 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_i2swapidxv(iictxt,iicomm,flag,beta,y,idx, &
& totxch,totsnd,totrcv,work,info)
use psi_mod, psb_protect_name => psi_i2swapidxv
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) :: iictxt,iicomm,flag
integer(psb_ipk_), intent(out) :: info
integer(psb_i2pk_) :: y(:), beta
integer(psb_i2pk_), target :: work(:)
integer(psb_ipk_), intent(in) :: idx(:),totxch,totsnd, totrcv
! locals
integer(psb_mpk_) :: ictxt, icomm, 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, n
logical :: swap_mpi, swap_sync, swap_send, swap_recv,&
& albf,do_send,do_recv
logical, parameter :: usersend=.false.
integer(psb_i2pk_), pointer, dimension(:) :: sndbuf, rcvbuf
volatile :: sndbuf, rcvbuf
character(len=20) :: name
info=psb_success_
name='psi_swap_datav'
call psb_erractionsave(err_act)
ictxt = iictxt
icomm = iicomm
call psb_info(ictxt,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(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 /= 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_i2pk_,rcvbuf,rvsz,&
& brvidx,psb_mpi_i2pk_,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(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(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(ictxt,proc_to_comm)
if ((nerv>0).and.(proc_to_comm /= me)) then
p2ptag = psb_int2_swap_tag
call mpi_irecv(rcvbuf(rcv_pt),nerv,&
& psb_mpi_i2pk_,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_int2_swap_tag
if ((nesd>0).and.(proc_to_comm /= me)) then
if (usersend) then
call mpi_rsend(sndbuf(snd_pt),nesd,&
& psb_mpi_i2pk_,prcid(i),&
& p2ptag,icomm,iret)
else
call mpi_send(sndbuf(snd_pt),nesd,&
& psb_mpi_i2pk_,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_int2_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(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 /= 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(iictxt,err_act)
return
end subroutine psi_i2swapidxv