1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*****************************************************************************\
* 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://computing.llnl.gov/linux/slurm/>.
* 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
#define __USE_GNU
#include <errno.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
static void _load_mask(cpu_set_t *mask)
{
int rc;
#ifdef SCHED_GETAFFINITY_THREE_ARGS
rc = sched_getaffinity((pid_t) 0, (unsigned int) sizeof(cpu_set_t),
mask);
#else
rc = sched_getaffinity((pid_t) 0, mask);
#endif
if (rc != 0) {
fprintf(stderr, "ERROR: sched_getaffinity: %s\n",
strerror(errno));
exit(1);
}
}
static int _mask_to_int(cpu_set_t *mask)
{
int i, rc = 0;
for (i=0; i<CPU_SETSIZE; i++) {
if (CPU_ISSET(i, mask))
rc += (1 << i);
}
return rc;
}
main (int argc, char **argv)
{
char *task_str;
cpu_set_t mask;
int task_id;
_load_mask(&mask);
if ((task_str = getenv("SLURM_PROCID")) == NULL) {
fprintf(stderr, "ERROR: getenv(SLURM_PROCID) failed\n");
exit(1);
}
task_id = atoi(task_str);
printf("TASK_ID:%d,MASK:%u\n", task_id, _mask_to_int(&mask));
exit(0);
}
|