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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"
int prodof(int, const int[]);
/*
* Test edge cases of Dims_create
*/
int prodof(int ndims, const int dims[])
{
int i, prod = 1;
for (i = 0; i < ndims; i++)
prod *= dims[i];
return prod;
}
int main(int argc, char *argv[])
{
int errs = 0;
int dims[4], nnodes;
MTest_Init(&argc, &argv);
/* 2 dimensional tests */
for (nnodes = 1; nnodes <= 32; nnodes = nnodes * 2) {
dims[0] = 0;
dims[1] = nnodes;
MPI_Dims_create(nnodes, 2, dims);
if (prodof(2, dims) != nnodes) {
errs++;
printf("Dims_create returned the wrong decomposition. ");
printf("Is [%d x %d], should be 1 x %d\n", dims[0], dims[1], nnodes);
}
/* Try calling Dims_create with nothing to do (all dimensions
* specified) */
dims[0] = 1;
dims[1] = nnodes;
MPI_Dims_create(nnodes, 2, dims);
if (prodof(2, dims) != nnodes) {
errs++;
printf("Dims_create returned the wrong decomposition (all given). ");
printf("Is [%d x %d], should be 1 x %d\n", dims[0], dims[1], nnodes);
}
}
/* 4 dimensional tests */
for (nnodes = 4; nnodes <= 32; nnodes = nnodes * 2) {
dims[0] = 0;
dims[1] = nnodes / 2;
dims[2] = 0;
dims[3] = 2;
MPI_Dims_create(nnodes, 4, dims);
if (prodof(4, dims) != nnodes) {
errs++;
printf("Dims_create returned the wrong decomposition. ");
printf("Is [%d x %d x %d x %d], should be 1 x %d x 1 x 2\n",
dims[0], dims[1], dims[2], dims[3], nnodes / 2);
}
/* Try calling Dims_create with nothing to do (all dimensions
* specified) */
dims[0] = 1;
dims[1] = nnodes / 2;
dims[2] = 1;
dims[3] = 2;
MPI_Dims_create(nnodes, 4, dims);
if (prodof(4, dims) != nnodes) {
errs++;
printf("Dims_create returned the wrong decomposition (all given). ");
printf("Is [%d x %d x %d x %d], should be 1 x %d x 1 x 2\n",
dims[0], dims[1], dims[2], dims[3], nnodes / 2);
}
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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