2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Tue Aug 26 2003 */
3 /* any_src-can-deadlock4.c -- deadlock occurs if task 0 receives */
4 /* from task 1 first; pretty random */
5 /* as to which is received first... */
13 main (int argc, char **argv)
17 char processor_name[128];
25 MPI_Init (&argc, &argv);
26 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
27 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
28 MPI_Get_processor_name (processor_name, &namelen);
29 printf ("(%d) is alive on %s\n", rank, processor_name);
32 MPI_Barrier (MPI_COMM_WORLD);
36 printf ("not enough tasks\n");
40 MPI_Irecv (buf0, buf_size, MPI_INT,
41 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &req);
43 MPI_Recv (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD, &status);
45 MPI_Send (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD);
47 MPI_Recv (buf1, buf_size, MPI_INT,
48 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
50 MPI_Wait (&req, &status);
54 memset (buf0, 0, buf_size*sizeof(int));
56 MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
58 MPI_Recv (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
60 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
64 memset (buf1, 1, buf_size*sizeof(int));
66 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
69 MPI_Barrier (MPI_COMM_WORLD);
72 printf ("(%d) Finished normally\n", rank);