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 15extern unsigned long total_forks; 16extern int nr_threads; 17DECLARE_PER_CPU(unsigned long, process_counts); 18extern int nr_processes(void); 19extern unsigned long nr_running(void); 20extern bool single_task_running(void); 21extern unsigned long nr_iowait(void); 22extern unsigned long nr_iowait_cpu(int cpu); 23 24static 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 37void force_schedstat_enabled(void); 38#endif 39 40#endif /* _LINUX_SCHED_STAT_H */ 41