1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_SCHED_STAT_H
3#define _LINUX_SCHED_STAT_H
4
5#include <linux/percpu.h>
6
7/*
8 * Various counters maintained by the scheduler and fork(),
9 * exposed via /proc, sys.c or used by drivers via these APIs.
10 *
11 * ( Note that all these values are aquired without locking,
12 * so they can only be relied on in narrow circumstances. )
13 */
14
15extern unsigned long total_forks;
16extern int nr_threads;
17DECLARE_PER_CPU(unsigned long, process_counts);
18extern int nr_processes(void);
19extern unsigned long nr_running(void);
20extern bool single_task_running(void);
21extern unsigned long nr_iowait(void);
22extern unsigned long nr_iowait_cpu(int cpu);
23extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
24
25static inline int sched_info_on(void)
26{
27#ifdef CONFIG_SCHEDSTATS
28 return 1;
29#elif defined(CONFIG_TASK_DELAY_ACCT)
30 extern int delayacct_on;
31 return delayacct_on;
32#else
33 return 0;
34#endif
35}
36
37#ifdef CONFIG_SCHEDSTATS
38void force_schedstat_enabled(void);
39#endif
40
41#endif /* _LINUX_SCHED_STAT_H */
42