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