1 /* Copyright (c) 2009-2010, 2013-2014. 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[])
25 MPI_Init(&argc, &argv);
26 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
27 MPI_Comm_size(MPI_COMM_WORLD, &size);
29 int* recv_counts = (int *) xbt_malloc(size * sizeof(int));
30 int* recv_disps = (int *) xbt_malloc(size * sizeof(int));
33 for (i = 0; i < size; i++) {
34 recv_counts[i] = i + 1;
35 recv_disps[i] = recv_sb_size;
36 recv_sb_size += i + 1;
39 int* sb = (int *) xbt_malloc(recv_counts[rank] * sizeof(int));
40 int* rb = (int *) xbt_malloc(recv_sb_size * sizeof(int));
42 for (i = 0; i < recv_counts[rank]; ++i)
43 sb[i] = recv_disps[rank] + i;
44 for (i = 0; i < recv_sb_size; ++i)
47 printf("[%d] sndbuf=[", rank);
48 for (i = 0; i < recv_counts[rank]; i++)
52 status = MPI_Allgatherv(sb, recv_counts[rank], MPI_INT, rb, recv_counts, recv_disps, MPI_INT, MPI_COMM_WORLD);
54 printf("[%d] rcvbuf=[", rank);
55 for (i = 0; i < recv_sb_size; i++)
60 if (status != MPI_SUCCESS) {
61 printf("allgatherv returned %d\n", status);
67 xbt_free(recv_counts);
70 return (EXIT_SUCCESS);