4 #include <linux/hrtimer.h>
6 enum tick_device_mode {
12 struct clock_event_device *evtdev;
13 enum tick_device_mode mode;
23 * struct tick_sched - sched tick emulation and no idle tick control/stats
24 * @sched_timer: hrtimer to schedule the periodic tick in high
26 * @last_tick: Store the last tick expiry time when the tick
27 * timer is modified for nohz sleeps. This is necessary
28 * to resume the tick timer operation in the timeline
29 * when the CPU returns from nohz sleep.
30 * @tick_stopped: Indicator that the idle tick has been stopped
31 * @idle_jiffies: jiffies at the entry to idle for idle time accounting
32 * @idle_calls: Total number of idle calls
33 * @idle_sleeps: Number of idle calls, where the sched tick was stopped
34 * @idle_entrytime: Time when the idle call was entered
35 * @idle_waketime: Time when the idle was interrupted
36 * @idle_exittime: Time when the idle state was left
37 * @idle_sleeptime: Sum of the time slept in idle with sched tick stopped
38 * @iowait_sleeptime: Sum of the time slept in idle with sched tick stopped, with IO outstanding
39 * @sleep_length: Duration of the current idle sleep
40 * @do_timer_lst: CPU was the last one doing do_timer before going idle
43 struct hrtimer sched_timer;
44 unsigned long check_clocks;
45 enum tick_nohz_mode nohz_mode;
49 unsigned long idle_jiffies;
50 unsigned long idle_calls;
51 unsigned long idle_sleeps;
53 ktime_t idle_entrytime;
54 ktime_t idle_waketime;
55 ktime_t idle_exittime;
56 ktime_t idle_sleeptime;
57 ktime_t iowait_sleeptime;
59 unsigned long last_jiffies;
63 unsigned long tick_dep_mask;
66 extern struct tick_sched *tick_get_tick_sched(int cpu);
68 extern void tick_setup_sched_timer(void);
69 #if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS
70 extern void tick_cancel_sched_timer(int cpu);
72 static inline void tick_cancel_sched_timer(int cpu) { }
75 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
76 extern int __tick_broadcast_oneshot_control(enum tick_broadcast_state state);
79 __tick_broadcast_oneshot_control(enum tick_broadcast_state state)