1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* This test borrows some ideas from a test provided by Rolf
* Rabenseifner (HLRS), but is a rewrite of the primary logic to make
* it more suitable for the MPICH test suite. */
#include <stdio.h>
#include <mpi.h>
#include "mpitest.h"
int main(int argc, char *argv[])
{
MTest_Init(&argc, &argv);
int size;
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size > 2) {
fprintf(stderr, "run this test with 1 or 2 processes\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
int dims[1] = { size };
int periods[1] = { 1 };
int reorder = 1;
MPI_Comm newcomm;
MPI_Cart_create(MPI_COMM_WORLD, 1, dims, periods, reorder, &newcomm);
int sbuf[2], rbuf[2] = { 0 };
sbuf[0] = -1;
sbuf[1] = 1;
MPI_Neighbor_alltoall(sbuf, 1, MPI_INT, rbuf, 1, MPI_INT, newcomm);
MPI_Comm_free(&newcomm);
int errs = 0;
if (rbuf[0] != 1 || rbuf[1] != -1) {
printf("expected rbuf to be (1,-1), but found (%d,%d)\n", rbuf[0], rbuf[1]);
errs++;
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
|
