include/linux/sched/stat.h

   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 aquired 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 extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
  24
  25 static inline int sched_info_on(void)
  26 {
  27 #ifdef CONFIG_SCHEDSTATS
  28         return 1;
  29 #elif defined(CONFIG_TASK_DELAY_ACCT)
  30         extern int delayacct_on;
  31         return delayacct_on;
  32 #else
  33         return 0;
  34 #endif
  35 }
  36
  37 #ifdef CONFIG_SCHEDSTATS
  38 void force_schedstat_enabled(void);
  39 #endif
  40
  41 #endif /* _LINUX_SCHED_STAT_H */