1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2001 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
7 /* One-Sided MPI 2-D Strided Accumulate Test
9 * Author: James Dinan <dinan@mcs.anl.gov>
10 * Date : December, 2010
12 * This code performs one-sided accumulate into a 2d patch of a shared array.
26 int main(int argc, char **argv) {
27 int i, j, rank, nranks, peer, bufsize, errors;
28 double *buffer, *src_buf;
31 MTest_Init(&argc, &argv);
33 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
34 MPI_Comm_size(MPI_COMM_WORLD, &nranks);
36 bufsize = XDIM * YDIM * sizeof(double);
37 MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &buffer);
38 MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &src_buf);
40 for (i = 0; i < XDIM*YDIM; i++) {
41 *(buffer + i) = 1.0 + rank;
42 *(src_buf + i) = 1.0 + rank;
45 MPI_Win_create(buffer, bufsize, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &buf_win);
47 peer = (rank+1) % nranks;
49 for (i = 0; i < ITERATIONS; i++) {
51 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, peer, 0, buf_win);
53 for (j = 0; j < YDIM; j++) {
54 MPI_Accumulate(src_buf + j*XDIM, XDIM, MPI_DOUBLE, peer,
55 j*XDIM*sizeof(double), XDIM, MPI_DOUBLE, MPI_SUM, buf_win);
58 MPI_Win_unlock(peer, buf_win);
61 MPI_Barrier(MPI_COMM_WORLD);
63 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, buf_win);
64 for (i = errors = 0; i < XDIM; i++) {
65 for (j = 0; j < YDIM; j++) {
66 const double actual = *(buffer + i + j*XDIM);
67 const double expected = (1.0 + rank) + (1.0 + ((rank+nranks-1)%nranks)) * (ITERATIONS);
68 if (fabs(actual - expected) > 1.0e-10) {
69 SQUELCH( printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
70 rank, j, i, expected, actual); );
76 MPI_Win_unlock(rank, buf_win);
78 MPI_Win_free(&buf_win);
80 MPI_Free_mem(src_buf);
82 MTest_Finalize( errors );
84 return MTestReturnValue( errors );