root/include/linux/sched/stat.h

INCLUDED FROM

DEFINITIONS

1. sched_info_on

   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 */