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Linux/include/linux/sched/stat.h

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  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 
 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 

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