1 /* Copyright (c) 2009-2018. 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. */
13 int main(int argc, char *argv[])
20 MPI_Init(&argc, &argv);
21 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
22 MPI_Comm_size(MPI_COMM_WORLD, &size);
24 int* recv_counts = (int *) xbt_malloc(size * sizeof(int));
25 int* recv_disps = (int *) xbt_malloc(size * sizeof(int));
28 for (i = 0; i < size; i++) {
29 recv_counts[i] = i + 1;
30 recv_disps[i] = recv_sb_size;
31 recv_sb_size += i + 1;
34 int* sb = (int *) xbt_malloc(recv_counts[rank] * sizeof(int));
35 int* rb = (int *) xbt_malloc(recv_sb_size * sizeof(int));
37 printf("[%d] sndbuf=[", rank);
38 for (i = 0; i < recv_counts[rank]; i++){
39 sb[i] = recv_disps[rank] + i;
44 for (i = 0; i < recv_sb_size; i++)
47 status = MPI_Allgatherv(sb, recv_counts[rank], MPI_INT, rb, recv_counts, recv_disps, MPI_INT, MPI_COMM_WORLD);
49 printf("[%d] rcvbuf=[", rank);
50 for (i = 0; i < recv_sb_size; i++)
54 if (rank == 0 && status != MPI_SUCCESS) {
55 printf("allgatherv returned %d\n", status);
60 xbt_free(recv_counts);
63 return (EXIT_SUCCESS);