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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SCHED_STAT_H
#define _LINUX_SCHED_STAT_H
#include <linux/percpu.h>
/*
* Various counters maintained by the scheduler and fork(),
* exposed via /proc, sys.c or used by drivers via these APIs.
*
* ( Note that all these values are aquired without locking,
* so they can only be relied on in narrow circumstances. )
*/
extern unsigned long total_forks;
extern int nr_threads;
DECLARE_PER_CPU(unsigned long, process_counts);
extern int nr_processes(void);
extern unsigned long nr_running(void);
extern bool single_task_running(void);
extern unsigned long nr_iowait(void);
extern unsigned long nr_iowait_cpu(int cpu);
extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
#ifdef CONFIG_SMP
extern void sched_update_nr_prod(int cpu, long delta, bool inc);
extern unsigned int sched_get_cpu_util(int cpu);
extern u64 sched_get_cpu_last_busy_time(int cpu);
#else
static inline void sched_update_nr_prod(int cpu, long delta, bool inc)
{
}
static inline unsigned int sched_get_cpu_util(int cpu)
{
return 0;
}
static inline u64 sched_get_cpu_last_busy_time(int cpu)
{
return 0;
}
#endif
static inline int sched_info_on(void)
{
#ifdef CONFIG_SCHEDSTATS
return 1;
#elif defined(CONFIG_TASK_DELAY_ACCT)
extern int delayacct_on;
return delayacct_on;
#else
return 0;
#endif
}
#ifdef CONFIG_SCHEDSTATS
void force_schedstat_enabled(void);
#endif
#endif /* _LINUX_SCHED_STAT_H */
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