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gt: don't use circular exchange for y deriv

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Bryce Allen 3 years ago
parent 7967991bd9
commit 84deab6ced
1 changed files with 30 additions and 28 deletions
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44
mpi_stencil2d_gt.cc
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@ -273,21 +273,20 @@ void boundary_exchange_y(MPI_Comm comm, int world_size, int rank,
MPI_Request req_l[2];
MPI_Request req_r[2];
int rank_l = (rank - 1) % world_size;
int rank_r = (rank + 1) % world_size;
int rank_l = rank - 1;
int rank_r = rank + 1;
auto sv_l = gt::view_strided(d_z, _all, _s(n_bnd, 2 * n_bnd));
auto sv_r = gt::view_strided(d_z, _all, _s(-2 * n_bnd, -n_bnd));
auto rv_l = gt::view_strided(d_z, _all, _s(0, n_bnd));
auto rv_r = gt::view_strided(d_z, _all, _s(-n_bnd, _));
// start async copy of ghost points into send buffers
if (rank_l >= 0) {
if (stage_device) {
if (rank_l >= 0) {
sbuf_l = sv_l;
}
}
if (rank_r <= world_size) {
if (stage_device) {
sbuf_r = sv_r;
}
}
@ -316,7 +315,9 @@ void boundary_exchange_y(MPI_Comm comm, int world_size, int rank,
}
// wait for send buffer fill
if (stage_device) {
gt::synchronize();
}
// initiate async sends
if (rank_l >= 0) {
@ -554,7 +555,6 @@ void test(int device_id, uint32_t vendor_id, int world_size, int world_rank,
printf("%d/%d [%d:0x%08x] err_norm = %.8f\n", world_rank, world_size,
device_id, vendor_id, err_norm);
}
int main(int argc, char** argv)
@ -603,21 +603,23 @@ int main(int argc, char** argv)
fflush(stdout);
/*
test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
test<gt::space::device, 1>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::device, 1>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
test<gt::space::managed, 1>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::managed, 1>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
*/
test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, true, 5);
test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank, n_global, n_iter, false, 5);
// test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, true, 5);
// test<gt::space::device, 0>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, false, 5);
// test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, true, 5);
// test<gt::space::managed, 0>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, false, 5);
test<gt::space::device, 1>(device_id, vendor_id, world_size, world_rank,
n_global, n_iter, true, 5);
test<gt::space::device, 1>(device_id, vendor_id, world_size, world_rank,
n_global, n_iter, false, 5);
// test<gt::space::managed, 1>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, true, 5);
// test<gt::space::managed, 1>(device_id, vendor_id, world_size, world_rank,
// n_global, n_iter, false, 5);
MPI_Finalize();

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