xref: /linux-6.15/include/linux/sched/stat.h (revision bb7e5ce7)
1 #ifndef _LINUX_SCHED_STAT_H
2 #define _LINUX_SCHED_STAT_H
3 
4 #include <linux/percpu.h>
5 
6 /*
7  * Various counters maintained by the scheduler and fork(),
8  * exposed via /proc, sys.c or used by drivers via these APIs.
9  *
10  * ( Note that all these values are aquired without locking,
11  *   so they can only be relied on in narrow circumstances. )
12  */
13 
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);
23 
24 static inline int sched_info_on(void)
25 {
26 #ifdef CONFIG_SCHEDSTATS
27 	return 1;
28 #elif defined(CONFIG_TASK_DELAY_ACCT)
29 	extern int delayacct_on;
30 	return delayacct_on;
31 #else
32 	return 0;
33 #endif
34 }
35 
36 #ifdef CONFIG_SCHEDSTATS
37 void force_schedstat_enabled(void);
38 #endif
39 
40 #endif /* _LINUX_SCHED_STAT_H */
41