1 /* A simple bugged MPI_ISend and MPI_IRecv test */
3 /* Copyright (c) 2009-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include <simgrid/modelchecker.h>
12 int main(int argc, char **argv)
19 int err = MPI_Init(&argc, &argv);
20 if (err != MPI_SUCCESS) {
21 printf("MPI initialization failed!\n");
25 MPI_Comm_size(MPI_COMM_WORLD, &size); /* Get nr of tasks */
26 MPI_Comm_rank(MPI_COMM_WORLD, &rank); /* Get id of this process */
28 printf("run this program with exactly 2 processes (-np 2)\n");
34 printf("MPI_ISend / MPI_IRecv Test \n");
37 for (int i = 0; i < size - 1; i++) {
38 MPI_Recv(&recv_buff, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
39 printf("Message received from %d\n", recv_buff);
42 printf("recv_buff = %d\n", recv_buff);
44 MPI_Send(&rank, 1, MPI_INT, 0, 42, MPI_COMM_WORLD);
45 printf("Sent %d to rank 0\n", rank);