+/* Copyright (c) 2009. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include <stdio.h>
#include <mpi.h>
-#define INIT_VALUE 3
-#define TARGET_VALUE 42
-
-int main (int argc, char **argv) {
+int main(int argc, char **argv)
+{
int size, rank;
- int value = INIT_VALUE;
+ int value = 3;
+ double start_timer;
+ int quiet = 0;
+
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+
+ if (argc > 1 && !strcmp(argv[1], "-q"))
+ quiet = 1;
+
+ start_timer = MPI_Wtime();
+
if (0 == rank) {
- value = TARGET_VALUE;
+ value = 17;
}
- fprintf(stderr,"node %d has value %d before broadcast\n", rank, value);
MPI_Bcast(&value, 1, MPI_INT, 0, MPI_COMM_WORLD);
- fprintf(stderr,"node %d has value %d after broadcast\n", rank, value);
- if (value != TARGET_VALUE) {
- fprintf(stderr,"node %d don't have the target value after broadcast!!\n", rank);
- exit(1);
+ if (value != 17) {
+ printf("node %d has value %d after broadcast\n", rank, value);
}
+
+ MPI_Barrier(MPI_COMM_WORLD);
+ if (0 == rank && !quiet)
+ printf("Elapsed time on rank %d: %lf s\n", rank,
+ MPI_Wtime() - start_timer);
MPI_Finalize();
return 0;
}