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Make the IB force-reduction receive buffers device resident #1843

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Make the IB force-reduction receive buffers device resident #1843

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14 changes: 8 additions & 6 deletions src/simulation/m_ibm.fpp
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Original file line number Diff line number Diff line change
Expand Up @@ -97,8 +97,8 @@ contains
#ifdef MFC_MPI
if (num_procs > 1) then
@:ALLOCATE(send_ids(size(patch_ib)), send_ft(6, size(patch_ib)))
allocate (recv_forces_snap(size(patch_ib), 3), recv_torques_snap(size(patch_ib), 3), recv_ids(size(patch_ib)), &
& recv_ft(6, size(patch_ib)))
@:ALLOCATE(recv_forces_snap(size(patch_ib), 3), recv_torques_snap(size(patch_ib), 3), recv_ids(size(patch_ib)), &
& recv_ft(6, size(patch_ib)))
end if
#endif

Expand Down Expand Up @@ -1310,6 +1310,7 @@ contains

recv_forces_snap = 0._wp
recv_torques_snap = 0._wp
$:GPU_UPDATE(device='[recv_forces_snap, recv_torques_snap]')
tag = 300

do k = 1, min(2*ib_neighborhood_radius, num_procs_${X}$ - 1)
Expand All @@ -1335,8 +1336,8 @@ contains
call MPI_UNPACK(ib_force_recv_buf, buf_size, unpack_pos, recv_ids, recv_count, MPI_INTEGER, &
& MPI_COMM_WORLD, ierr)
call MPI_UNPACK(ib_force_recv_buf, buf_size, unpack_pos, recv_ft, 6*recv_count, mpi_p, MPI_COMM_WORLD, ierr)
$:GPU_PARALLEL_LOOP(private='[i, j]', copyin='[recv_ft, recv_ids]', copy='[forces, torques, &
& recv_forces_snap, recv_torques_snap]')
$:GPU_UPDATE(device='[recv_ids, recv_ft]')
$:GPU_PARALLEL_LOOP(private='[i, j]', copy='[forces, torques]')
Comment on lines +1339 to +1340
do i = 1, recv_count
call s_get_neighborhood_idx(recv_ids(i), j)
if (j > 0) then
Expand Down Expand Up @@ -1381,7 +1382,8 @@ contains
call MPI_UNPACK(ib_force_recv_buf, buf_size, unpack_pos, recv_ids, recv_count, MPI_INTEGER, &
& MPI_COMM_WORLD, ierr)
call MPI_UNPACK(ib_force_recv_buf, buf_size, unpack_pos, recv_ft, 6*recv_count, mpi_p, MPI_COMM_WORLD, ierr)
$:GPU_PARALLEL_LOOP(private='[i, j]', copyin='[recv_ft, recv_ids]', copy='[forces, torques]')
$:GPU_UPDATE(device='[recv_ids, recv_ft]')
$:GPU_PARALLEL_LOOP(private='[i, j]', copy='[forces, torques]')
Comment on lines +1385 to +1386
do i = 1, recv_count
call s_get_neighborhood_idx(recv_ids(i), j)
if (j > 0) then
Expand Down Expand Up @@ -1599,7 +1601,7 @@ contains
#ifdef MFC_MPI
if (num_procs > 1) then
@:DEALLOCATE(send_ids, send_ft)
deallocate (recv_forces_snap, recv_torques_snap, recv_ids, recv_ft)
@:DEALLOCATE(recv_forces_snap, recv_torques_snap, recv_ids, recv_ft)
end if
#endif

Expand Down
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