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 sched_info_on(void)25static 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 */ 42
