MPI_Init(&argc, &argv);
+ int rank;
+ MPI_Comm_rank(MPI_COMM_WORLD,&rank);
+
double *a = malloc(sizeof(double) * M);
double *b = malloc(sizeof(double) * N);
// Commenting out this barrier fixes it!!
MPI_Barrier(MPI_COMM_WORLD);
+ if(rank==0) {
+ printf("Walltime = %g\n",MPI_Wtime());
+ }
+
MPI_Finalize();
free(a);
free(b);