1 #ifndef _LINUX_SCHED_STAT_H 2 #define _LINUX_SCHED_STAT_H 3 4 #include <linux/percpu.h> 5 6 /* 7 * Various counters maintained by the scheduler and fork(), 8 * exposed via /proc, sys.c or used by drivers via these APIs. 9 * 10 * ( Note that all these values are aquired without locking, 11 * so they can only be relied on in narrow circumstances. ) 12 */ 13 14 extern unsigned long total_forks; 15 extern int nr_threads; 16 DECLARE_PER_CPU(unsigned long, process_counts); 17 extern int nr_processes(void); 18 extern unsigned long nr_running(void); 19 extern bool single_task_running(void); 20 extern unsigned long nr_iowait(void); 21 extern unsigned long nr_iowait_cpu(int cpu); 22 extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load); 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