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 acquired without locking,
12  *   so they can only be relied on in narrow circumstances. )
13  */
14 
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);
23 
sched_info_on(void)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