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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <string.h>
#include "mpitest.h"
/* Check that Comm_create detects the case where the group is not a subset of
the group of the input communicator */
void abortMsg(const char *, int);
void abortMsg(const char *str, int code)
{
char msg[MPI_MAX_ERROR_STRING];
int class, resultLen;
MPI_Error_class(code, &class);
MPI_Error_string(code, msg, &resultLen);
fprintf(stderr, "%s: errcode = %d, class = %d, msg = %s\n", str, code, class, msg);
MPI_Abort(MPI_COMM_WORLD, code);
}
int main(int argc, char *argv[])
{
MPI_Comm evencomm, lowcomm, newcomm;
int wrank, wsize, gsize, err, errs = 0;
int ranges[1][3], mygrank;
MPI_Group wGroup, godd, ghigh, geven;
MTest_Init(&argc, &argv);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
MPI_Comm_size(MPI_COMM_WORLD, &wsize);
MPI_Comm_rank(MPI_COMM_WORLD, &wrank);
/* Create some communicators */
MPI_Comm_split(MPI_COMM_WORLD, wrank % 2, wrank, &evencomm);
MPI_Comm_split(MPI_COMM_WORLD, wrank < wsize / 2, wsize - wrank, &lowcomm);
MPI_Comm_set_errhandler(evencomm, MPI_ERRORS_RETURN);
MPI_Comm_set_errhandler(lowcomm, MPI_ERRORS_RETURN);
/* Create some groups */
MPI_Comm_group(MPI_COMM_WORLD, &wGroup);
ranges[0][0] = 2 * (wsize / 2) - 1;
ranges[0][1] = 1;
ranges[0][2] = -2;
err = MPI_Group_range_incl(wGroup, 1, ranges, &godd);
if (err)
abortMsg("Failed to create odd group: ", err);
err = MPI_Group_size(godd, &gsize);
if (err)
abortMsg("Failed to get size of odd group: ", err);
if (gsize != wsize / 2) {
fprintf(stderr, "Group godd size is %d should be %d\n", gsize, wsize / 2);
errs++;
}
ranges[0][0] = wsize / 4;
ranges[0][1] = wsize - 1;
ranges[0][2] = 1;
err = MPI_Group_range_incl(wGroup, 1, ranges, &ghigh);
if (err)
abortMsg("Failed to create high group\n", err);
ranges[0][0] = 0;
ranges[0][1] = wsize - 1;
ranges[0][2] = 2;
err = MPI_Group_range_incl(wGroup, 1, ranges, &geven);
if (err)
abortMsg("Failed to create even group:", err);
/* Check that a correct case returns success */
if ((wrank % 2) == 0) {
err = MPI_Group_rank(geven, &mygrank);
if (err) {
errs++;
fprintf(stderr, "Could not get rank from geven group\n");
} else if (mygrank == MPI_UNDEFINED) {
errs++;
fprintf(stderr, "mygrank should be %d but is undefined\n", wrank / 2);
}
err = MPI_Comm_create(evencomm, geven, &newcomm);
/* printf("Created new even comm\n"); */
if (err != MPI_SUCCESS) {
errs++;
fprintf(stderr, "Failed to allow creation from even group\n");
} else {
MPI_Comm_free(&newcomm);
}
}
/* Now, test that these return errors when we try to use them to create
* groups */
if ((wrank % 2) == 0) {
/* printf("Even comm...\n"); */
/* evencomm is the comm of even-ranked processed in comm world */
err = MPI_Comm_create(evencomm, godd, &newcomm);
MPI_Group_rank(godd, &mygrank);
if (err == MPI_SUCCESS) {
if (mygrank != MPI_UNDEFINED) {
errs++;
fprintf(stderr, "Did not detect group of odd ranks in even comm\n");
}
MPI_Comm_free(&newcomm);
}
}
if (wrank < wsize / 2) {
/* printf("low comm...\n"); */
err = MPI_Comm_create(lowcomm, ghigh, &newcomm);
MPI_Group_rank(ghigh, &mygrank);
if (err == MPI_SUCCESS) {
if (mygrank != MPI_UNDEFINED) {
errs++;
fprintf(stderr, "Did not detect group of high ranks in low comm\n");
}
MPI_Comm_free(&newcomm);
}
}
MPI_Comm_free(&lowcomm);
MPI_Comm_free(&evencomm);
MPI_Group_free(&ghigh);
MPI_Group_free(&godd);
MPI_Group_free(&geven);
MPI_Group_free(&wGroup);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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