4 int main(int argc, char **argv)
11 MPI_Init(&argc, &argv);
12 MPI_Comm_size(MPI_COMM_WORLD, &size);
13 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
15 if (argc > 1 && !strcmp(argv[1], "-q"))
18 start_timer = MPI_Wtime();
23 printf("node %d has value %d before broadcast\n", rank, value);
24 MPI_Bcast(&value, 1, MPI_INT, 0, MPI_COMM_WORLD);
25 printf("node %d has value %d after broadcast\n", rank, value);
27 MPI_Barrier(MPI_COMM_WORLD);
28 if (0 == rank && !quiet)
29 printf("Elapsed time on rank %d: %lf s\n", rank,
30 MPI_Wtime() - start_timer);