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psblas3/src/internals/psi_dswapdata.f90
T
Salvatore Filippone 960e13a6b4 Initial revision
2005-09-07 09:16:09 +00:00

740 lines
24 KiB
Fortran
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subroutine psi_dswapdatam(flag,n,beta,y,desc_a,work,info)
use psb_error_mod
use psb_descriptor_type
implicit none
include 'mpif.h'
integer, intent(in) :: flag, n
integer, intent(out) :: info
real(kind(1.d0)) :: y(:,:), beta
real(kind(1.d0)), target ::work(:)
type(psb_desc_type) :: desc_a
! locals
integer :: icontxt, nprow, npcol, myrow,&
& mycol, point_to_proc, nesd, nerv,&
& proc_to_comm, p2ptag, icomm, p2pstat,&
& idxs, idxr, iret, errlen, ifcomm, rank,&
& err_act, totxch, ixrec, i, lw, idx_pt,&
& snd_pt, rcv_pt
integer :: blacs_pnum, krecvid, ksendid
integer, pointer, dimension(:) :: bsdidx, brvidx,&
& sdsz, rvsz, prcid, ptp, rvhd, h_idx
integer :: int_err(5)
logical :: swap_mpi, swap_sync, swap_send, swap_recv
real(kind(1.d0)), pointer, dimension(:) :: sndbuf, rcvbuf
character(len=20) :: name, ch_err
info = 0
name='psi_dswap_data'
call psb_erractionsave(err_act)
icontxt=desc_a%matrix_data(psb_ctxt_)
call blacs_gridinfo(icontxt,nprow,npcol,myrow,mycol)
if (nprow == -1) then
info = 2010
call psb_errpush(info,name)
goto 9999
else if (npcol /= 1) then
info = 2030
int_err(1) = npcol
call psb_errpush(info,name)
goto 9999
endif
call blacs_get(icontxt,10,icomm)
allocate(sdsz(0:nprow-1), rvsz(0:nprow-1), bsdidx(0:nprow-1),&
& brvidx(0:nprow-1), rvhd(0:nprow-1), prcid(0:nprow-1),&
& ptp(0:nprow-1), stat=info)
if(info.ne.0) then
call psb_errpush(4000,name)
goto 9999
end if
swap_mpi = iand(flag,psb_swap_mpi_).ne.0
swap_sync = iand(flag,psb_swap_sync_).ne.0
swap_send = iand(flag,psb_swap_send_).ne.0
swap_recv = iand(flag,psb_swap_recv_).ne.0
h_idx => desc_a%halo_index
idxs = 0
idxr = 0
totxch = 0
point_to_proc = 1
rvhd(:) = mpi_request_null
! prepare info for communications
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm.ne.-1)
if(proc_to_comm .ne. myrow) totxch = totxch+1
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
prcid(proc_to_comm) = blacs_pnum(icontxt,proc_to_comm,mycol)
ptp(proc_to_comm) = point_to_proc
brvidx(proc_to_comm) = idxr
rvsz(proc_to_comm) = n*nerv
idxr = idxr+rvsz(proc_to_comm)
bsdidx(proc_to_comm) = idxs
sdsz(proc_to_comm) = n*nesd
idxs = idxs+sdsz(proc_to_comm)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
if((idxr+idxs).lt.size(work)) then
sndbuf => work(1:idxs)
rcvbuf => work(idxs+1:idxs+idxr)
else
allocate(sndbuf(idxs),rcvbuf(idxr), stat=info)
if(info.ne.0) then
call psb_errpush(4000,name)
goto 9999
end if
end if
! Case SWAP_MPI
if(swap_mpi) then
! gather elements into sendbuffer for swapping
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
! swap elements using mpi_alltoallv
call mpi_alltoallv(sndbuf,sdsz,bsdidx,&
& mpi_double_precision,rcvbuf,rvsz,&
& brvidx,mpi_double_precision,icomm,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
! scatter elements from receivebuffer after swapping
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+n*nerv-1),beta,y)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_sync) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if (proc_to_comm .lt. myrow) then
! First I send
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
call dgesd2d(icontxt,nesd,n,sndbuf(snd_pt),nesd,proc_to_comm,0)
! Then I receive
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,n,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
else if (proc_to_comm .gt. myrow) then
! First I receive
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,n,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
! Then I send
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
call dgesd2d(icontxt,nesd,n,sndbuf(snd_pt),nesd,proc_to_comm,0)
else if (proc_to_comm .eq. myrow) then
! I send to myself
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+n*nerv-1),beta,y)
else
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+n*nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_send .and. swap_recv) then
! First I post all the non blocking receives
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
p2ptag = krecvid(icontxt,proc_to_comm,myrow)
rcv_pt = brvidx(proc_to_comm)
call mpi_irecv(rcvbuf(rcv_pt),rvsz(proc_to_comm),&
& mpi_double_precision,prcid(proc_to_comm),&
& p2ptag, icomm,rvhd(proc_to_comm),iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
! Then I post all the blocking sends
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
if(proc_to_comm .ne. myrow) then
p2ptag=ksendid(icontxt,proc_to_comm,myrow)
call mpi_send(sndbuf(snd_pt),sdsz(proc_to_comm),&
& mpi_double_precision,prcid(proc_to_comm),&
& p2ptag,icomm,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
do i=1, totxch
call mpi_waitany(nprow,rvhd,ixrec,p2pstat,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
if (ixrec .ne. mpi_undefined) then
ixrec=ixrec-1 ! mpi_waitany returns an 1 to nprow index
point_to_proc = ptp(ixrec)
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+n*nerv-1),beta,y)
else
int_err(1) = ixrec
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end do
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm .eq. myrow) then
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+n*nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_send) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,n,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd*n-1))
call dgesd2d(icontxt,nesd,n,sndbuf(snd_pt),nesd,proc_to_comm,0)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_recv) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,n,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+n*nerv-1),beta,y)
else
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,n,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+n*nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.act_abort) then
call psb_error(icontxt)
return
end if
return
end subroutine psi_dswapdatam
subroutine psi_dswapdatav(flag,beta,y,desc_a,work,info)
use psb_error_mod
use psb_descriptor_type
implicit none
include 'mpif.h'
integer, intent(in) :: flag
integer, intent(out) :: info
real(kind(1.d0)) :: y(:), beta
real(kind(1.d0)), target :: work(:)
type(psb_desc_type) :: desc_a
! locals
integer :: icontxt, nprow, npcol, myrow,&
& mycol, point_to_proc, nesd, nerv,&
& proc_to_comm, p2ptag, icomm, p2pstat,&
& idxs, idxr, iret, errlen, ifcomm, rank,&
& err_act, totxch, ixrec, i, lw, idx_pt,&
& snd_pt, rcv_pt, n
integer, pointer, dimension(:) :: bsdidx, brvidx,&
& sdsz, rvsz, prcid, ptp, rvhd, h_idx
integer :: blacs_pnum, krecvid, ksendid
integer :: int_err(5)
logical :: swap_mpi, swap_sync, swap_send, swap_recv
real(kind(1.d0)), pointer, dimension(:) :: sndbuf, rcvbuf
character(len=20) :: name, ch_err
info = 0
name='psi_dswap_datav'
call psb_erractionsave(err_act)
icontxt=desc_a%matrix_data(psb_ctxt_)
call blacs_gridinfo(icontxt,nprow,npcol,myrow,mycol)
if (nprow == -1) then
info = 2010
call psb_errpush(info,name)
goto 9999
else if (npcol /= 1) then
info = 2030
int_err(1) = npcol
call psb_errpush(info,name)
goto 9999
endif
call blacs_get(icontxt,10,icomm)
allocate(sdsz(0:nprow-1), rvsz(0:nprow-1), bsdidx(0:nprow-1),&
& brvidx(0:nprow-1), rvhd(0:nprow-1), prcid(0:nprow-1),&
& ptp(0:nprow-1), stat=info)
if(info.ne.0) then
call psb_errpush(4000,name)
goto 9999
end if
swap_mpi = iand(flag,psb_swap_mpi_).ne.0
swap_sync = iand(flag,psb_swap_sync_).ne.0
swap_send = iand(flag,psb_swap_send_).ne.0
swap_recv = iand(flag,psb_swap_recv_).ne.0
h_idx => desc_a%halo_index
idxs = 0
idxr = 0
totxch = 0
point_to_proc = 1
rvhd(:) = mpi_request_null
n=1
! prepare info for communications
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm.ne.-1)
if(proc_to_comm .ne. myrow) totxch = totxch+1
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
prcid(proc_to_comm) = blacs_pnum(icontxt,proc_to_comm,mycol)
ptp(proc_to_comm) = point_to_proc
brvidx(proc_to_comm) = idxr
rvsz(proc_to_comm) = n*nerv
idxr = idxr+rvsz(proc_to_comm)
bsdidx(proc_to_comm) = idxs
sdsz(proc_to_comm) = n*nesd
idxs = idxs+sdsz(proc_to_comm)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
if((idxr+idxs).lt.size(work)) then
sndbuf => work(1:idxs)
rcvbuf => work(idxs+1:idxs+idxr)
else
allocate(sndbuf(idxs),rcvbuf(idxr), stat=info)
if(info.ne.0) then
call psb_errpush(4000,name)
goto 9999
end if
end if
! Case SWAP_MPI
if(swap_mpi) then
! gather elements into sendbuffer for swapping
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
! swap elements using mpi_alltoallv
call mpi_alltoallv(sndbuf,sdsz,bsdidx,&
& mpi_double_precision,rcvbuf,rvsz,&
& brvidx,mpi_double_precision,icomm,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
! scatter elements from receivebuffer after swapping
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+nerv-1),beta,y)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_sync) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if (proc_to_comm .lt. myrow) then
! First I send
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
call dgesd2d(icontxt,nesd,1,sndbuf(snd_pt),nesd,proc_to_comm,0)
! Then I receive
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,1,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
else if (proc_to_comm .gt. myrow) then
! First I receive
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,1,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
! Then I send
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
call dgesd2d(icontxt,nesd,1,sndbuf(snd_pt),nesd,proc_to_comm,0)
else if (proc_to_comm .eq. myrow) then
! I send to myself
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+nerv-1),beta,y)
else
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_send .and. swap_recv) then
! First I post all the non blocking receives
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
p2ptag = krecvid(icontxt,proc_to_comm,myrow)
rcv_pt = brvidx(proc_to_comm)
call mpi_irecv(rcvbuf(rcv_pt),rvsz(proc_to_comm),&
& mpi_double_precision,prcid(proc_to_comm),&
& p2ptag, icomm,rvhd(proc_to_comm),iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
! Then I post all the blocking sends
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
if(proc_to_comm .ne. myrow) then
p2ptag=ksendid(icontxt,proc_to_comm,myrow)
call mpi_send(sndbuf(snd_pt),sdsz(proc_to_comm),&
& mpi_double_precision,prcid(proc_to_comm),&
& p2ptag,icomm,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
do i=1, totxch
call mpi_waitany(nprow,rvhd,ixrec,p2pstat,iret)
if(iret.ne.mpi_success) then
int_err(1) = iret
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
if (ixrec .ne. mpi_undefined) then
ixrec=ixrec-1 ! mpi_waitany returns an 1 to nprow index
point_to_proc = ptp(ixrec)
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+nesd-1),beta,y)
else
int_err(1) = ixrec
info=400
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
end do
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm .eq. myrow) then
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_send) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
idx_pt = point_to_proc+nerv+psb_elem_send_
snd_pt = bsdidx(proc_to_comm)
call psi_gth(nesd,h_idx(idx_pt:idx_pt+nesd-1),&
& y,sndbuf(snd_pt:snd_pt+nesd-1))
call dgesd2d(icontxt,nesd,1,sndbuf(snd_pt),nesd,proc_to_comm,0)
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
else if (swap_recv) then
point_to_proc = 1
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
do while (proc_to_comm .ne. -1)
nerv = h_idx(point_to_proc+psb_n_elem_recv_)
nesd = h_idx(point_to_proc+nerv+psb_n_elem_send_)
if(proc_to_comm.ne.myrow) then
rcv_pt = brvidx(proc_to_comm)
call dgerv2d(icontxt,nerv,1,rcvbuf(rcv_pt),nerv,proc_to_comm,0)
idx_pt = point_to_proc+psb_elem_recv_
rcv_pt = brvidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& rcvbuf(rcv_pt:rcv_pt+nerv-1),beta,y)
else
idx_pt = point_to_proc+psb_elem_recv_
snd_pt = bsdidx(proc_to_comm)
call psi_sct(nerv,h_idx(idx_pt:idx_pt+nerv-1),&
& sndbuf(snd_pt:snd_pt+nesd-1),beta,y)
end if
point_to_proc = point_to_proc+nerv+nesd+3
proc_to_comm = h_idx(point_to_proc+psb_proc_id_)
end do
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.act_abort) then
call psb_error(icontxt)
return
end if
return
end subroutine psi_dswapdatav
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