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/*****************************************************************************\
* test1.91.prog.c - Simple test program for Slurm regression test1.91.
* Reports Slurm task ID and the CPU mask,
* similar functionality to "taskset" command
*****************************************************************************
* Copyright (C) 2005 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Morris Jette <jette1@llnl.gov>
* CODE-OCEC-09-009. All rights reserved.
*
* This file is part of Slurm, a resource management program.
* For details, see <https://slurm.schedmd.com/>.
* Please also read the included file: DISCLAIMER.
*
* Slurm is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* Slurm is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with Slurm; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\*****************************************************************************/
#define _GNU_SOURCE
#include <errno.h>
#include <inttypes.h>
#include <sched.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
static void _load_mask(cpu_set_t *mask)
{
int rc;
rc = sched_getaffinity((pid_t) 0, sizeof(cpu_set_t), mask);
if (rc != 0) {
fprintf(stderr, "ERROR: sched_getaffinity: %s\n",
strerror(errno));
exit(1);
}
}
int val_to_char(int v)
{
if (v >= 0 && v < 10)
return '0' + v;
else if (v >= 10 && v < 16)
return ('a' - 10) + v;
else
return -1;
}
static char *_cpuset_to_str(const cpu_set_t *mask, char *str, int size)
{
int base, cnt;
char *ptr = str;
char *ret = NULL;
for (base = CPU_SETSIZE - 4; base >= 0; base -= 4) {
char val = 0;
if (++cnt >= size)
break;
if (CPU_ISSET(base, mask))
val |= 1;
if (CPU_ISSET(base + 1, mask))
val |= 2;
if (CPU_ISSET(base + 2, mask))
val |= 4;
if (CPU_ISSET(base + 3, mask))
val |= 8;
if (!ret && val)
ret = ptr;
*ptr++ = val_to_char(val);
}
*ptr = '\0';
return ret ? ret : ptr - 1;
}
static uint64_t _mask_to_int(cpu_set_t *mask)
{
uint64_t i, rc = 0;
for (i = 0; i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, mask)) {
if (i > 63) {
printf("OVERFLOW\n");
rc = 999999999;
break;
}
rc += (((uint64_t) 1) << i);
}
}
return rc;
}
int main (int argc, char **argv)
{
char mask_str[2048], *task_str;
cpu_set_t mask;
int task_id;
_load_mask(&mask);
/* On POE systems, MP_CHILD is equivalent to SLURM_PROCID */
if (((task_str = getenv("SLURM_PROCID")) == NULL) &&
((task_str = getenv("MP_CHILD")) == NULL)) {
fprintf(stderr, "ERROR: getenv(SLURM_PROCID) failed\n");
exit(1);
}
task_id = atoi(task_str);
/* NOTE: The uint64_t number is subject to overflow if there are
* >64 CPUs on a compute node, but the hex value will be valid */
printf("TASK_ID:%d,MASK:%"PRIu64":0x%s\n", task_id,
_mask_to_int(&mask),
_cpuset_to_str(&mask, mask_str, sizeof(mask_str)));
exit(0);
}
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