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 processs.
22 static const int verbose = 0;
29 double src_buf[MAXELEMS];
32 MPI_Alloc_mem(sizeof(double)*nproc*MAXELEMS, MPI_INFO_NULL, &dst_buf);
33 MPI_Win_create(dst_buf, sizeof(double)*nproc*MAXELEMS, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &dst_win);
35 for (i = 0; i < MAXELEMS; i++)
36 src_buf[i] = me + 1.0;
38 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, me, 0, dst_win);
40 for (i = 0; i < nproc*MAXELEMS; i++)
43 MPI_Win_unlock(me, dst_win);
45 MPI_Barrier(MPI_COMM_WORLD);
47 for(i = 0; i < nproc; i++) {
50 for(j = 0; j < COUNT; j++) {
51 if (verbose) printf("%2d -> %2d [%2d]\n", me, target, j);
52 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
53 MPI_Put(&src_buf[j], sizeof(double), MPI_BYTE, target, (me*MAXELEMS+j)*sizeof(double), sizeof(double), MPI_BYTE, dst_win);
54 MPI_Win_unlock(target, dst_win);
57 for(j = 0; j < COUNT; j++) {
58 if (verbose) printf("%2d <- %2d [%2d]\n", me, target, j);
59 MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
60 MPI_Get(&src_buf[j], sizeof(double), MPI_BYTE, target, (me*MAXELEMS+j)*sizeof(double), sizeof(double), MPI_BYTE, dst_win);
61 MPI_Win_unlock(target, dst_win);
65 MPI_Barrier(MPI_COMM_WORLD);
67 MPI_Win_free(&dst_win);
68 MPI_Free_mem(dst_buf);
72 int main(int argc, char* argv[]) {
73 MPI_Init(&argc, &argv);
74 MPI_Comm_size(MPI_COMM_WORLD, &nproc);
75 MPI_Comm_rank(MPI_COMM_WORLD, &me);
77 assert(COUNT <= MAXELEMS);
79 if (me == 0 && verbose) {
80 printf("Test starting on %d processes\n", nproc);
86 MPI_Barrier(MPI_COMM_WORLD);
90 if (me == 0 && verbose) {
91 printf("Test completed.\n");
96 printf(" No Errors\n");