1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
4 * (C) 2003 by Argonne National Laboratory.
5 * See COPYRIGHT in top-level directory.
14 const int NITER = 1000;
15 const int acc_val = 3;
17 int main(int argc, char **argv)
20 int out_val, i, counter = 0;
23 MPI_Init(&argc, &argv);
25 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
26 MPI_Comm_size(MPI_COMM_WORLD, &nproc);
28 MPI_Win_create(&counter, sizeof(int), sizeof(int), MPI_INFO_NULL,
29 MPI_COMM_WORLD, &win);
31 for (i = 0; i < NITER; i++) {
32 MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, win);
33 MPI_Get_accumulate(&acc_val, 1, MPI_INT, &out_val, 1, MPI_INT,
34 rank, 0, 1, MPI_INT, MPI_SUM, win);
35 MPI_Win_unlock(rank, win);
37 if (out_val != acc_val*i) {
39 printf("Error: got %d, expected %d at iter %d\n", out_val, acc_val*i, i);
46 if (errors == 0 && rank == 0)
47 printf(" No errors\n");