1 /* Copyright (c) 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. */
8 * (C) 2001 by Argonne National Laboratory.
9 * See COPYRIGHT in top-level directory.
18 This program tests MPI_Alltoallv by having processor i send different
19 amounts of data to each processor.
21 Because there are separate send and receive types to alltoallv,
22 there need to be tests to rearrange data on the fly. Not done yet.
24 The first test sends i items to processor i from all processors.
26 Currently, the test uses only MPI_INT; this is adequate for testing systems
27 that use point-to-point operations
33 * <0> sbuf: (#9): [0][1][2][3][4][5][6][7][8]
34 <0> scount: (#3): [0][1][2]
35 <0> rcount: (#3): [0][0][0]
36 <0> sdisp: (#3): [0][1][3]
37 <0> rdisp: (#3): [0][0][0]
39 <1> sbuf: (#9): [100][101][102][103][104][105][106][107][108]
40 <1> scount: (#3): [0][1][2]
41 <1> rcount: (#3): [1][1][1]
42 <1> sdisp: (#3): [0][1][3]
43 <1> rdisp: (#3): [0][1][2]
45 <2> sbuf: (#9): [200][201][202][203][204][205][206][207][208]
46 <2> scount: (#3): [0][1][2]
47 <2> rcount: (#3): [2][2][2]
48 <2> sdisp: (#3): [0][1][3]
49 <2> rdisp: (#3): [0][2][4]
52 <0> rbuf: (#9): [-1][-1][-1][-1][-1][-1][-1][-1][-1]
53 <1> rbuf: (#9): [1][101][201][-1][-1][-1][-1][-1][-1]
54 <2> rbuf: (#9): [3][4][103][104][203][204][-1][-1][-1]
58 static void print_buffer_int(void *buf, int len, char *msg, int rank)
61 printf("[%d] %s (#%d): ", rank, msg, len);
62 for (tmp = 0; tmp < len; tmp++) {
64 printf("[%d]", v[tmp]);
71 int main(int argc, char **argv)
77 int *sendcounts, *recvcounts, *rdispls, *sdispls;
80 MPI_Init(&argc, &argv);
82 comm = MPI_COMM_WORLD;
84 /* Create the buffer */
85 MPI_Comm_size(comm, &size);
86 MPI_Comm_rank(comm, &rank);
87 sbuf = (int *) xbt_malloc(size * size * sizeof(int));
88 rbuf = (int *) xbt_malloc(size * size * sizeof(int));
90 /* Load up the buffers */
91 for (i = 0; i < size * size; i++) {
92 sbuf[i] = i + 100 * rank;
96 /* Create and load the arguments to alltoallv */
97 sendcounts = (int *) xbt_malloc(size * sizeof(int));
98 recvcounts = (int *) xbt_malloc(size * sizeof(int));
99 rdispls = (int *) xbt_malloc(size * sizeof(int));
100 sdispls = (int *) xbt_malloc(size * sizeof(int));
101 for (i = 0; i < size; i++) {
103 recvcounts[i] = rank;
104 rdispls[i] = i * rank;
105 sdispls[i] = (i * (i + 1)) / 2;
108 print_buffer_int( sbuf, size*size, strdup("sbuf:"),rank);
109 print_buffer_int( sendcounts, size, strdup("scount:"),rank);
110 print_buffer_int( recvcounts, size, strdup("rcount:"),rank);
111 print_buffer_int( sdispls, size, strdup("sdisp:"),rank);
112 print_buffer_int( rdispls, size, strdup("rdisp:"),rank);
114 MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT,
115 rbuf, recvcounts, rdispls, MPI_INT, comm);
117 print_buffer_int( rbuf, size*size, strdup("rbuf:"),rank);
119 MPI_Barrier(MPI_COMM_WORLD);
121 printf("Alltoallv TEST COMPLETE.\n");