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 /** Contended RMA put/get test -- James Dinan <dinan@mcs.anl.gov>
9 * Each process issues COUNT put and get operations to non-overlapping
10 * locations on every other process.
22 static const int verbose = 0;
28 MPI_Comm_size(MPI_COMM_WORLD, &nproc);
29 MPI_Comm_rank(MPI_COMM_WORLD, &me);
32 double src_buf[MAXELEMS];
35 MPI_Alloc_mem(sizeof(double) * nproc * MAXELEMS, MPI_INFO_NULL, &dst_buf);
36 MPI_Win_create(dst_buf, sizeof(double) * nproc * MAXELEMS, 1, MPI_INFO_NULL, MPI_COMM_WORLD,
39 for (i = 0; i < MAXELEMS; i++)
40 src_buf[i] = me + 1.0;
42 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, me, 0, dst_win);
44 for (i = 0; i < nproc * MAXELEMS; i++)
47 MPI_Win_unlock(me, dst_win);
49 MPI_Barrier(MPI_COMM_WORLD);
51 for (i = 0; i < nproc; i++) {
54 for (j = 0; j < COUNT; j++) {
56 printf("%2d -> %2d [%2d]\n", me, target, j);
57 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
58 MPI_Put(&src_buf[j], sizeof(double), MPI_BYTE, target,
59 (me * MAXELEMS + j) * sizeof(double), sizeof(double), MPI_BYTE, dst_win);
60 MPI_Win_unlock(target, dst_win);
63 for (j = 0; j < COUNT; j++) {
65 printf("%2d <- %2d [%2d]\n", me, target, j);
66 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
67 MPI_Get(&src_buf[j], sizeof(double), MPI_BYTE, target,
68 (me * MAXELEMS + j) * sizeof(double), sizeof(double), MPI_BYTE, dst_win);
69 MPI_Win_unlock(target, dst_win);
73 MPI_Barrier(MPI_COMM_WORLD);
75 MPI_Win_free(&dst_win);
76 MPI_Free_mem(dst_buf);
80 int main(int argc, char *argv[])
82 MPI_Init(&argc, &argv);
84 MPI_Comm_size(MPI_COMM_WORLD, &nproc);
85 MPI_Comm_rank(MPI_COMM_WORLD, &me);
87 assert(COUNT <= MAXELEMS);
89 if (me == 0 && verbose) {
90 printf("Test starting on %d processes\n", nproc);
96 MPI_Barrier(MPI_COMM_WORLD);
100 if (me == 0 && verbose) {
101 printf("Test completed.\n");
106 printf(" No Errors\n");