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c1797baf TG |
1 | #ifndef _TICK_SCHED_H |
2 | #define _TICK_SCHED_H | |
3 | ||
4 | #include <linux/hrtimer.h> | |
5 | ||
7270d11c TG |
6 | enum tick_device_mode { |
7 | TICKDEV_MODE_PERIODIC, | |
8 | TICKDEV_MODE_ONESHOT, | |
9 | }; | |
10 | ||
11 | struct tick_device { | |
12 | struct clock_event_device *evtdev; | |
13 | enum tick_device_mode mode; | |
14 | }; | |
15 | ||
c1797baf TG |
16 | enum tick_nohz_mode { |
17 | NOHZ_MODE_INACTIVE, | |
18 | NOHZ_MODE_LOWRES, | |
19 | NOHZ_MODE_HIGHRES, | |
20 | }; | |
21 | ||
22 | /** | |
23 | * struct tick_sched - sched tick emulation and no idle tick control/stats | |
24 | * @sched_timer: hrtimer to schedule the periodic tick in high | |
25 | * resolution mode | |
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 | |
41 | */ | |
42 | struct tick_sched { | |
43 | struct hrtimer sched_timer; | |
44 | unsigned long check_clocks; | |
45 | enum tick_nohz_mode nohz_mode; | |
46 | ktime_t last_tick; | |
47 | int inidle; | |
48 | int tick_stopped; | |
49 | unsigned long idle_jiffies; | |
50 | unsigned long idle_calls; | |
51 | unsigned long idle_sleeps; | |
52 | int idle_active; | |
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; | |
58 | ktime_t sleep_length; | |
59 | unsigned long last_jiffies; | |
c1ad348b | 60 | u64 next_timer; |
c1797baf TG |
61 | ktime_t idle_expires; |
62 | int do_timer_last; | |
63 | }; | |
64 | ||
65 | extern struct tick_sched *tick_get_tick_sched(int cpu); | |
66 | ||
67 | extern void tick_setup_sched_timer(void); | |
68 | #if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS | |
69 | extern void tick_cancel_sched_timer(int cpu); | |
70 | #else | |
71 | static inline void tick_cancel_sched_timer(int cpu) { } | |
72 | #endif | |
73 | ||
74 | #endif |