1 #ifndef _LINUX_SCHED_STAT_H
2 #define _LINUX_SCHED_STAT_H
4 #include <linux/percpu.h>
7 * Various counters maintained by the scheduler and fork(),
8 * exposed via /proc, sys.c or used by drivers via these APIs.
10 * ( Note that all these values are aquired without locking,
11 * so they can only be relied on in narrow circumstances. )
14 extern unsigned long total_forks;
15 extern int nr_threads;
16 DECLARE_PER_CPU(unsigned long, process_counts);
17 extern int nr_processes(void);
18 extern unsigned long nr_running(void);
19 extern bool single_task_running(void);
20 extern unsigned long nr_iowait(void);
21 extern unsigned long nr_iowait_cpu(int cpu);
22 extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
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 */