+/* Copyright (c) 2009, 2010. 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 "mpi.h"
#include <stdlib.h>
#include <stdio.h>
#define EXIT_FAILURE 1
#endif
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
{
- int rank, size;
- int i;
- int *sb;
- int *rb;
- int status;
-
- MPI_Init(&argc,&argv);
- MPI_Comm_rank(MPI_COMM_WORLD,&rank);
- MPI_Comm_size(MPI_COMM_WORLD,&size);
-
- sb = (int *)malloc(size*sizeof(int));
- if ( !sb ) {
- perror( "can't allocate send buffer" );fflush(stderr);
- MPI_Abort(MPI_COMM_WORLD,EXIT_FAILURE);
- }
- rb = (int *)malloc(size*sizeof(int));
- if ( !rb ) {
- perror( "can't allocate recv buffer");fflush(stderr);
- free(sb);
- MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
- }
- for ( i=0 ; i < size ; ++i ) {
- sb[i] = rank + 1;
- rb[i] = 0;
- }
- status = MPI_Alltoall(sb, 1, MPI_INT, rb, 1, MPI_INT, MPI_COMM_WORLD);
+ int rank, size;
+ int i;
+ int *sb;
+ int *rb;
+ int status;
- printf("[%d] rcvbuf=[",rank);
- for (i=0;i<size;i++)
- printf("%d ",rb[i]);
- printf("]\n");
+ MPI_Init(&argc, &argv);
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+ MPI_Comm_size(MPI_COMM_WORLD, &size);
+ sb = (int *) malloc(size * sizeof(int));
+ if (!sb) {
+ perror("can't allocate send buffer");
+ fflush(stderr);
+ MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
+ }
+ rb = (int *) malloc(size * sizeof(int));
+ if (!rb) {
+ perror("can't allocate recv buffer");
+ fflush(stderr);
+ free(sb);
+ MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
+ }
+ for (i = 0; i < size; ++i) {
+ sb[i] = rank + 1;
+ rb[i] = 0;
+ }
+ status = MPI_Alltoall(sb, 1, MPI_INT, rb, 1, MPI_INT, MPI_COMM_WORLD);
+
+ printf("[%d] rcvbuf=[", rank);
+ for (i = 0; i < size; i++)
+ printf("%d ", rb[i]);
+ printf("]\n");
- if (rank == 0) {
- if (status != 0) {
- printf("all_to_all returned %d\n",status);fflush(stdout);
- }
+
+ if (rank == 0) {
+ if (status != 0) {
+ printf("all_to_all returned %d\n", status);
+ fflush(stdout);
}
- free(sb);
- free(rb);
- MPI_Finalize();
- return(EXIT_SUCCESS);
+ }
+ free(sb);
+ free(rb);
+ MPI_Finalize();
+ return (EXIT_SUCCESS);
}