1 /* A simple bugged MPI_ISend and MPI_IRecv test */
3 /* Copyright (c) 2009, 2011, 2013-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <simgrid/modelchecker.h>
13 int main(int argc, char **argv)
22 int err = MPI_Init(&argc, &argv);
23 if (err != MPI_SUCCESS) {
24 printf("MPI initialization failed!\n");
28 MPI_Comm_size(MPI_COMM_WORLD, &size); /* Get nr of tasks */
29 MPI_Comm_rank(MPI_COMM_WORLD, &rank); /* Get id of this process */
31 printf("run this program with exactly 3*N processes \n");
37 MPI_Recv(&x, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
38 printf("(%d) x <- %d\n", rank, x);
39 MPI_Recv(&y, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
40 printf("(%d) y <- %d\n", rank, y);
42 MPI_Send(&rank, 1, MPI_INT, (rank / 3) * 3, 42, MPI_COMM_WORLD);
43 printf("Sent %d to rank %d\n", rank, (rank / 3) * 3);