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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
int main(int argc, char *argv[])
{
MPI_Group g1, g2, g4, g5, g45, selfgroup, g6;
int ranks[16], size, rank, myrank, range[1][3];
int errs = 0;
int i, rin[16], rout[16], result;
MTest_Init(&argc, &argv);
MPI_Comm_group(MPI_COMM_WORLD, &g1);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 8) {
fprintf(stderr, "Test requires 8 processes (16 preferred) only %d provided\n", size);
errs++;
}
/* 16 members, this process is rank 0, return in group 1 */
ranks[0] = myrank;
ranks[1] = 2;
ranks[2] = 7;
if (myrank == 2)
ranks[1] = 3;
if (myrank == 7)
ranks[2] = 6;
MPI_Group_incl(g1, 3, ranks, &g2);
/* Check the resulting group */
MPI_Group_size(g2, &size);
MPI_Group_rank(g2, &rank);
if (size != 3) {
fprintf(stderr, "Size should be %d, is %d\n", 3, size);
errs++;
}
if (rank != 0) {
fprintf(stderr, "Rank should be %d, is %d\n", 0, rank);
errs++;
}
rin[0] = 0;
rin[1] = 1;
rin[2] = 2;
MPI_Group_translate_ranks(g2, 3, rin, g1, rout);
for (i = 0; i < 3; i++) {
if (rout[i] != ranks[i]) {
fprintf(stderr, "translated rank[%d] %d should be %d\n", i, rout[i], ranks[i]);
errs++;
}
}
/* Translate the process of the self group against another group */
MPI_Comm_group(MPI_COMM_SELF, &selfgroup);
rin[0] = 0;
MPI_Group_translate_ranks(selfgroup, 1, rin, g1, rout);
if (rout[0] != myrank) {
fprintf(stderr, "translated of self is %d should be %d\n", rout[0], myrank);
errs++;
}
for (i = 0; i < size; i++)
rin[i] = i;
MPI_Group_translate_ranks(g1, size, rin, selfgroup, rout);
for (i = 0; i < size; i++) {
if (i == myrank && rout[i] != 0) {
fprintf(stderr, "translated world to self of %d is %d\n", i, rout[i]);
errs++;
} else if (i != myrank && rout[i] != MPI_UNDEFINED) {
fprintf(stderr, "translated world to self of %d should be undefined, is %d\n",
i, rout[i]);
errs++;
}
}
MPI_Group_free(&selfgroup);
/* Exclude everyone in our group */
{
int ii, *lranks, g1size;
MPI_Group_size(g1, &g1size);
lranks = (int *) malloc(g1size * sizeof(int));
for (ii = 0; ii < g1size; ii++)
lranks[ii] = ii;
MPI_Group_excl(g1, g1size, lranks, &g6);
if (g6 != MPI_GROUP_EMPTY) {
fprintf(stderr, "Group formed by excluding all ranks not empty\n");
errs++;
MPI_Group_free(&g6);
}
free(lranks);
}
/* Add tests for additional group operations */
/*
* g2 = incl 1,3,7
* g3 = excl 1,3,7
* intersect (w, g2) => g2
* intersect (w, g3) => g3
* intersect (g2, g3) => empty
*
* g4 = rincl 1:n-1:2
* g5 = rexcl 1:n-1:2
* union(g4, g5) => world
* g6 = rincl n-1:1:-1
* g7 = rexcl n-1:1:-1
* union(g6, g7) => concat of entries, similar to world
* diff(w, g2) => g3
*/
MPI_Group_free(&g2);
range[0][0] = 1;
range[0][1] = size - 1;
range[0][2] = 2;
MPI_Group_range_excl(g1, 1, range, &g5);
range[0][0] = 1;
range[0][1] = size - 1;
range[0][2] = 2;
MPI_Group_range_incl(g1, 1, range, &g4);
MPI_Group_union(g4, g5, &g45);
MPI_Group_compare(MPI_GROUP_EMPTY, g4, &result);
if (result != MPI_UNEQUAL) {
errs++;
fprintf(stderr, "Comparison with empty group gave %d, not 3\n", result);
}
MPI_Group_free(&g4);
MPI_Group_free(&g5);
MPI_Group_free(&g45);
/* Now, duplicate the test, but using negative strides */
range[0][0] = size - 1;
range[0][1] = 1;
range[0][2] = -2;
MPI_Group_range_excl(g1, 1, range, &g5);
range[0][0] = size - 1;
range[0][1] = 1;
range[0][2] = -2;
MPI_Group_range_incl(g1, 1, range, &g4);
MPI_Group_union(g4, g5, &g45);
MPI_Group_compare(MPI_GROUP_EMPTY, g4, &result);
if (result != MPI_UNEQUAL) {
errs++;
fprintf(stderr,
"Comparison with empty group (formed with negative strides) gave %d, not 3\n",
result);
}
MPI_Group_free(&g4);
MPI_Group_free(&g5);
MPI_Group_free(&g45);
MPI_Group_free(&g1);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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