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)
28 int i, j, rank, nranks, peer, bufsize, errors;
29 double *buffer, *src_buf;
32 MTest_Init(&argc, &argv);
34 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
35 MPI_Comm_size(MPI_COMM_WORLD, &nranks);
37 bufsize = XDIM * YDIM * sizeof(double);
38 MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &buffer);
39 MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &src_buf);
41 for (i = 0; i < XDIM * YDIM; i++) {
42 *(buffer + i) = 1.0 + rank;
43 *(src_buf + i) = 1.0 + rank;
46 MPI_Win_create(buffer, bufsize, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &buf_win);
48 peer = (rank + 1) % nranks;
50 for (i = 0; i < ITERATIONS; i++) {
52 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, peer, 0, buf_win);
54 for (j = 0; j < YDIM; j++) {
55 MPI_Accumulate(src_buf + j * XDIM, XDIM, MPI_DOUBLE, peer,
56 j * XDIM * sizeof(double), XDIM, MPI_DOUBLE, MPI_SUM, buf_win);
59 MPI_Win_unlock(peer, buf_win);
62 MPI_Barrier(MPI_COMM_WORLD);
64 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, buf_win);
65 for (i = errors = 0; i < XDIM; i++) {
66 for (j = 0; j < YDIM; j++) {
67 const double actual = *(buffer + i + j * XDIM);
68 const double expected =
69 (1.0 + rank) + (1.0 + ((rank + nranks - 1) % nranks)) * (ITERATIONS);
70 if (fabs(actual - expected) > 1.0e-10) {
71 SQUELCH(printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
72 rank, j, i, expected, actual););
78 MPI_Win_unlock(rank, buf_win);
80 MPI_Win_free(&buf_win);
82 MPI_Free_mem(src_buf);
84 MTest_Finalize(errors);
86 return MTestReturnValue(errors);