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