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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) 2013-2019 Intel, Inc. All rights reserved.
* Copyright (c) 2015 Mellanox Technologies, Inc. All rights reserved.
* Copyright (c) 2021-2022 Nanook Consulting. All rights reserved.
* Copyright (c) 2023 Triad National Security, LLC. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
*/
#define _GNU_SOURCE
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "examples.h"
#include <pmix.h>
static pmix_proc_t myproc;
int main(int argc, char **argv)
{
pmix_status_t rc;
pid_t pid;
char hostname[1024];
pmix_value_t *val;
uint32_t jobsize, nodeid;
size_t n;
pmix_proc_t proc, wildcard;
pid = getpid();
gethostname(hostname, 1024);
/* init us - note that the call to "init" includes the return of
* any job-related info provided by the RM */
if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
fprintf(stderr, "[%s:%lu] PMIx_Init failed: %s\n",
hostname, (unsigned long)pid, PMIx_Error_string(rc));
exit(0);
}
PMIX_LOAD_PROCID(&wildcard, myproc.nspace, PMIX_RANK_WILDCARD);
/* get our job size */
if (PMIX_SUCCESS != (rc = PMIx_Get(&wildcard, PMIX_JOB_SIZE, NULL, 0, &val))) {
fprintf(stderr, "[%s:%u] PMIx_Get job size failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
PMIX_VALUE_GET_NUMBER(rc, val, jobsize, uint32_t);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "[%s:%u] Got bad job size: %s\n",
myproc.nspace, myproc.rank, PMIx_Error_string(rc));
goto done;
}
PMIX_VALUE_RELEASE(val);
/* get the nodeid of all our peers */
PMIX_LOAD_NSPACE(proc.nspace, myproc.nspace);
for (n=0; n < jobsize; n++) {
proc.rank = n;
rc = PMIx_Get(&proc, PMIX_NODEID, NULL, 0, &val);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "[%s:%u] PMIx_Get failed for nodeid on rank %zd: %s\n",
myproc.nspace, myproc.rank, n, PMIx_Error_string(rc));
break;
}
PMIX_VALUE_GET_NUMBER(rc, val, nodeid, uint32_t);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "[%s:%u] Got bad nodeid for rank %zd: %s\n",
myproc.nspace, myproc.rank, n, PMIx_Error_string(rc));
goto done;
}
if (0 == myproc.rank) {
fprintf(stderr, "[%s:%u] Peer %zd is running on node %u\n",
myproc.nspace, myproc.rank, n, nodeid);
}
PMIX_VALUE_RELEASE(val);
}
fprintf(stderr, "[%s:%u]: Successfully retrieved all nodeids\n",
myproc.nspace, myproc.rank);
done:
/* finalize us */
if (PMIX_SUCCESS != (rc = PMIx_Finalize(NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d:PMIx_Finalize failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
}
fflush(stderr);
return (0);
}
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