2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Thu Jan 3 2002 */
3 /* any_src-can-deadlock.c -- deadlock occurs if task 0 receives */
4 /* from task 2 first; the unlikely outcome */
5 /* because we sleep task 2 */
13 main (int argc, char **argv)
17 char processor_name[128];
24 MPI_Init (&argc, &argv);
25 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
26 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
27 MPI_Get_processor_name (processor_name, &namelen);
28 printf ("(%d) is alive on %s\n", rank, processor_name);
31 MPI_Barrier (MPI_COMM_WORLD);
35 printf ("not enough tasks\n");
39 MPI_Recv (buf1, buf_size, MPI_INT,
40 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
42 MPI_Send (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD);
44 MPI_Recv (buf0, buf_size, MPI_INT,
45 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
49 memset (buf0, 0, buf_size);
51 MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
53 MPI_Recv (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
57 memset (buf1, 1, buf_size);
61 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
64 MPI_Barrier (MPI_COMM_WORLD);
67 printf ("(%d) Finished normally\n", rank);