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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"
#include "mpitestconf.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/*
static char MTEST_Descrip[] = "A simple test of Comm_spawn, with complex arguments";
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int rank, size, rsize, i;
int np = 2;
int errcodes[2];
MPI_Comm parentcomm, intercomm;
MPI_Status status;
char *inargv[] =
{ (char *) "a", (char *) "b=c", (char *) "d e", (char *) "-pf", (char *) " Ss", 0 };
char *outargv[] =
{ (char *) "a", (char *) "b=c", (char *) "d e", (char *) "-pf", (char *) " Ss", 0 };
int can_spawn;
MTest_Init(&argc, &argv);
errs += MTestSpawnPossible(&can_spawn);
if (can_spawn) {
MPI_Comm_get_parent(&parentcomm);
if (parentcomm == MPI_COMM_NULL) {
/* Create 2 more processes */
/* ./ is unix specific .
* The more generic approach would be to specify "spawnargv" as the
* executable and pass an info with ("path", ".") */
MPI_Comm_spawn((char *) "./spawnargv", inargv, np,
MPI_INFO_NULL, 0, MPI_COMM_WORLD, &intercomm, errcodes);
} else
intercomm = parentcomm;
/* We now have a valid intercomm */
MPI_Comm_remote_size(intercomm, &rsize);
MPI_Comm_size(intercomm, &size);
MPI_Comm_rank(intercomm, &rank);
if (parentcomm == MPI_COMM_NULL) {
/* Parent */
if (rsize != np) {
errs++;
printf("Did not create %d processes (got %d)\n", np, rsize);
}
for (i = 0; i < rsize; i++) {
MPI_Send(&i, 1, MPI_INT, i, 0, intercomm);
}
/* We could use intercomm reduce to get the errors from the
* children, but we'll use a simpler loop to make sure that
* we get valid data */
for (i = 0; i < rsize; i++) {
MPI_Recv(&err, 1, MPI_INT, i, 1, intercomm, MPI_STATUS_IGNORE);
errs += err;
}
} else {
/* Child */
/* FIXME: This assumes that stdout is handled for the children
* (the error count will still be reported to the parent) */
if (size != np) {
errs++;
printf("(Child) Did not create %d processes (got %d)\n", np, size);
}
MPI_Recv(&i, 1, MPI_INT, 0, 0, intercomm, &status);
if (i != rank) {
errs++;
printf("Unexpected rank on child %d (%d)\n", rank, i);
}
/* Check the command line */
for (i = 1; i < argc; i++) {
if (!outargv[i - 1]) {
errs++;
printf("Wrong number of arguments (%d)\n", argc);
break;
}
if (strcmp(argv[i], outargv[i - 1]) != 0) {
errs++;
printf("Found arg %s but expected %s\n", argv[i], outargv[i - 1]);
}
}
if (outargv[i - 1]) {
/* We had too few args in the spawned command */
errs++;
printf("Too few arguments to spawned command\n");
}
/* Send the errs back to the parent process */
MPI_Ssend(&errs, 1, MPI_INT, 0, 1, intercomm);
}
/* It isn't necessary to free the intercomm, but it should not hurt */
MPI_Comm_free(&intercomm);
/* Note that the MTest_Finalize get errs only over COMM_WORLD */
if (parentcomm == MPI_COMM_NULL) {
MTest_Finalize(errs);
} else {
MPI_Finalize();
}
} else {
MTest_Finalize(errs);
}
return MTestReturnValue(errs);
}
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