1 /* Copyright (c) 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
14 #define EXIT_SUCCESS 0
15 #define EXIT_FAILURE 1
18 int main( int argc, char *argv[] )
26 MPI_Init(&argc,&argv);
27 MPI_Comm_rank(MPI_COMM_WORLD,&rank);
28 MPI_Comm_size(MPI_COMM_WORLD,&size);
30 sb = (int *)malloc(size*sizeof(int));
32 perror( "can't allocate send buffer" );fflush(stderr);
33 MPI_Abort(MPI_COMM_WORLD,EXIT_FAILURE);
35 rb = (int *)malloc(size*sizeof(int));
37 perror( "can't allocate recv buffer");fflush(stderr);
39 MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);
41 for ( i=0 ; i < size ; ++i ) {
45 status = MPI_Alltoall(sb, 1, MPI_INT, rb, 1, MPI_INT, MPI_COMM_WORLD);
47 printf("[%d] rcvbuf=[",rank);
55 printf("all_to_all returned %d\n",status);fflush(stdout);