65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
|
#ifndef _TICK_SCHED_H
|
||
|
|
#define _TICK_SCHED_H
|
||
|
|
|
||
|
|
#include <linux/hrtimer.h>
|
||
|
|
|
||
|
|
enum tick_nohz_mode {
|
||
|
|
NOHZ_MODE_INACTIVE,
|
||
|
|
NOHZ_MODE_LOWRES,
|
||
|
|
NOHZ_MODE_HIGHRES,
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct tick_sched - sched tick emulation and no idle tick control/stats
|
||
|
|
* @sched_timer: hrtimer to schedule the periodic tick in high
|
||
|
|
* resolution mode
|
||
|
|
* @last_tick: Store the last tick expiry time when the tick
|
||
|
|
* timer is modified for nohz sleeps. This is necessary
|
||
|
|
* to resume the tick timer operation in the timeline
|
||
|
|
* when the CPU returns from nohz sleep.
|
||
|
|
* @tick_stopped: Indicator that the idle tick has been stopped
|
||
|
|
* @idle_jiffies: jiffies at the entry to idle for idle time accounting
|
||
|
|
* @idle_calls: Total number of idle calls
|
||
|
|
* @idle_sleeps: Number of idle calls, where the sched tick was stopped
|
||
|
|
* @idle_entrytime: Time when the idle call was entered
|
||
|
|
* @idle_waketime: Time when the idle was interrupted
|
||
|
|
* @idle_exittime: Time when the idle state was left
|
||
|
|
* @idle_sleeptime: Sum of the time slept in idle with sched tick stopped
|
||
|
|
* @iowait_sleeptime: Sum of the time slept in idle with sched tick stopped, with IO outstanding
|
||
|
|
* @sleep_length: Duration of the current idle sleep
|
||
|
|
* @do_timer_lst: CPU was the last one doing do_timer before going idle
|
||
|
|
*/
|
||
|
|
struct tick_sched {
|
||
|
|
struct hrtimer sched_timer;
|
||
|
|
unsigned long check_clocks;
|
||
|
|
enum tick_nohz_mode nohz_mode;
|
||
|
|
ktime_t last_tick;
|
||
|
|
int inidle;
|
||
|
|
int tick_stopped;
|
||
|
|
unsigned long idle_jiffies;
|
||
|
|
unsigned long idle_calls;
|
||
|
|
unsigned long idle_sleeps;
|
||
|
|
int idle_active;
|
||
|
|
ktime_t idle_entrytime;
|
||
|
|
ktime_t idle_waketime;
|
||
|
|
ktime_t idle_exittime;
|
||
|
|
ktime_t idle_sleeptime;
|
||
|
|
ktime_t iowait_sleeptime;
|
||
|
|
ktime_t sleep_length;
|
||
|
|
unsigned long last_jiffies;
|
||
|
|
unsigned long next_jiffies;
|
||
|
|
ktime_t idle_expires;
|
||
|
|
int do_timer_last;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct tick_sched *tick_get_tick_sched(int cpu);
|
||
|
|
|
||
|
|
extern void tick_setup_sched_timer(void);
|
||
|
|
#if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS
|
||
|
|
extern void tick_cancel_sched_timer(int cpu);
|
||
|
|
#else
|
||
|
|
static inline void tick_cancel_sched_timer(int cpu) { }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|