2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Tue Aug 26 2003 */
3 /* any_src-can-deadlock5.c -- deadlock occurs if task 0 receives */
4 /* from task 1 first; sleeps generally */
5 /* make order 2 before 1 with all task */
6 /* 0 ops being posted after both 1 and 2 */
15 main (int argc, char **argv)
19 char processor_name[128];
27 MPI_Init (&argc, &argv);
28 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
29 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
30 MPI_Get_processor_name (processor_name, &namelen);
31 printf ("(%d) is alive on %s\n", rank, processor_name);
34 MPI_Barrier (MPI_COMM_WORLD);
38 printf ("not enough tasks\n");
44 MPI_Irecv (buf0, buf_size, MPI_INT,
45 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &req);
47 MPI_Recv (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD, &status);
49 MPI_Send (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD);
51 MPI_Recv (buf1, buf_size, MPI_INT,
52 MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &status);
54 MPI_Wait (&req, &status);
58 memset (buf0, 0, buf_size);
62 MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
64 MPI_Recv (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
66 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
70 memset (buf1, 1, buf_size);
72 MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
75 MPI_Barrier (MPI_COMM_WORLD);
78 printf ("(%d) Finished normally\n", rank);