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/*
* Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2011 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006-2013 Los Alamos National Security, LLC.
* All rights reserved.
* Copyright (c) 2009-2012 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2011 Oak Ridge National Labs. All rights reserved.
* Copyright (c) 2013-2020 Intel, Inc. All rights reserved.
* Copyright (c) 2015 Mellanox Technologies, Inc. All rights reserved.
* Copyright (c) 2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2019 IBM Corporation. All rights reserved.
* Copyright (c) 2021-2025 Nanook Consulting All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
*/
#include <stdbool.h>
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <time.h>
#include <unistd.h>
#include <libgen.h>
#include "examples.h"
#include <pmix.h>
static pmix_proc_t myproc;
int main(int argc, char **argv)
{
int rc;
pmix_value_t *val = NULL, value;
pmix_proc_t proc, *parray;
uint32_t nprocs;
size_t nall, n, maxprocs = 2;
char nsp2[PMIX_MAX_NSLEN + 1], *nsp;
pmix_app_t *app;
char hostname[1024], dir[1024];
pmix_info_t *results = NULL, info;
size_t nresults = 0;
EXAMPLES_HIDE_UNUSED_PARAMS(argc, argv);
if (0 > gethostname(hostname, sizeof(hostname))) {
exit(1);
}
if (NULL == getcwd(dir, 1024)) {
exit(1);
}
/* init us */
if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Init failed: %d\n", myproc.nspace, myproc.rank,
rc);
exit(0);
}
fprintf(stderr, "Client ns %s rank %d: Running on host %s\n", myproc.nspace, myproc.rank, hostname);
PMIX_PROC_CONSTRUCT(&proc);
PMIX_LOAD_PROCID(&proc, myproc.nspace, PMIX_RANK_WILDCARD);
/* get our job size */
if (PMIX_SUCCESS != (rc = PMIx_Get(&proc, PMIX_JOB_SIZE, NULL, 0, &val))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Get job size failed: %d\n", myproc.nspace,
myproc.rank, rc);
goto done;
}
nprocs = val->data.uint32;
PMIX_VALUE_RELEASE(val);
fprintf(stderr, "Client %s:%d job size %d\n", myproc.nspace, myproc.rank, nprocs);
/* call fence to sync */
PMIX_LOAD_PROCID(&proc, myproc.nspace, PMIX_RANK_WILDCARD);
if (PMIX_SUCCESS != (rc = PMIx_Fence(&proc, 1, NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Fence failed: %d\n", myproc.nspace, myproc.rank,
rc);
goto done;
}
if (NULL == getenv("PMIX_ENV_VALUE")) {
// we are the parent
/* rank=0 calls spawn */
if (0 == myproc.rank) {
nsp = basename(argv[0]);
PMIX_APP_CREATE(app, 1);
app->cmd = strdup(argv[0]);
app->maxprocs = maxprocs;
app->argv = (char **) malloc(4 * sizeof(char *));
app->argv[0] = strdup(nsp);
app->argv[1] = strdup(myproc.nspace);
if (0 > asprintf(&app->argv[2], "%d", nprocs)) {
goto done;
}
app->argv[3] = NULL;
app->env = (char **) malloc(2 * sizeof(char *));
app->env[0] = strdup("PMIX_ENV_VALUE=3");
app->env[1] = NULL;
PMIX_INFO_LOAD(&info, PMIX_MAPBY, "node", PMIX_STRING);
fprintf(stderr, "Client ns %s rank %d: calling PMIx_Spawn\n", myproc.nspace, myproc.rank);
if (PMIX_SUCCESS != (rc = PMIx_Spawn(&info, 1, app, 1, nsp2))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Spawn failed: %d\n", myproc.nspace,
myproc.rank, rc);
goto done;
}
PMIX_APP_FREE(app, 1);
// share the child namespace
value.type = PMIX_STRING;
value.data.string = nsp2;
if (PMIX_SUCCESS != (rc = PMIx_Put(PMIX_GLOBAL, "child", &value))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Put child nspace failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
PMIx_Commit();
// wait to sync with others
nsp = nsp2;
PMIX_LOAD_PROCID(&proc, myproc.nspace, PMIX_RANK_WILDCARD);
rc = PMIx_Fence(&proc, 1, NULL, 0);
// everybody calls connect
nall = nprocs + maxprocs;
PMIX_PROC_CREATE(parray, nall);
for (n=0; n < nprocs; n++) {
PMIX_LOAD_PROCID(&parray[n], myproc.nspace, n);
}
for (n=0; n < maxprocs; n++) {
PMIX_LOAD_PROCID(&parray[n+nprocs], nsp, n);
}
} else {
PMIX_LOAD_PROCID(&proc, myproc.nspace, PMIX_RANK_WILDCARD);
rc = PMIx_Fence(&proc, 1, NULL, 0);
// retrieve the child nspace
proc.rank = 0;
rc = PMIx_Get(&proc, "child", NULL, 0, &val);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Get child nspace failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
nsp = val->data.string;
// everybody calls connect
nall = nprocs + maxprocs;
PMIX_PROC_CREATE(parray, nall);
for (n=0; n < nprocs; n++) {
PMIX_LOAD_PROCID(&parray[n], myproc.nspace, n);
}
for (n=0; n < maxprocs; n++) {
PMIX_LOAD_PROCID(&parray[n+nprocs], nsp, n);
}
}
} else {
// we are the child job
nsp = argv[1];
maxprocs = atoi(argv[2]);
// everybody calls connect
nall = nprocs + maxprocs;
PMIX_PROC_CREATE(parray, nall);
for (n=0; n < maxprocs; n++) {
PMIX_LOAD_PROCID(&parray[n], nsp, n);
}
for (n=0; n < nprocs; n++) {
PMIX_LOAD_PROCID(&parray[n+maxprocs], myproc.nspace, n);
}
}
fprintf(stderr, "Client ns %s rank %d: calling PMIx_Connect\n", myproc.nspace, myproc.rank);
rc = PMIx_Connect(parray, nall, NULL, 0);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Connect failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
if (0 == myproc.rank) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Connect GOOD\n", myproc.nspace, myproc.rank);
}
rc = PMIx_Disconnect(parray, nall, NULL, 0);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Disonnect failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
if (0 == myproc.rank) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Disconnect GOOD\n", myproc.nspace, myproc.rank);
}
rc = PMIx_Group_construct("mygrp", parray, nall, NULL, 0, &results, &nresults);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Group_construct failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
if (0 == myproc.rank) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Group_construct GOOD\n", myproc.nspace, myproc.rank);
}
rc = PMIx_Group_destruct("mygrp", NULL, 0);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Group_destruct failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
if (0 == myproc.rank) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Group_destruct GOOD\n", myproc.nspace, myproc.rank);
}
done:
/* finalize us */
fprintf(stderr, "Client ns %s rank %d: Finalizing\n", myproc.nspace, myproc.rank);
if (PMIX_SUCCESS != (rc = PMIx_Finalize(NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d:PMIx_Finalize failed: %d\n", myproc.nspace,
myproc.rank, rc);
} else {
fprintf(stderr, "Client ns %s rank %d:PMIx_Finalize successfully completed\n",
myproc.nspace, myproc.rank);
}
fflush(stderr);
return (0);
}
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