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