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| author | Thomas Gleixner <tglx@linutronix.de> | 2006-03-26 01:38:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 08:57:02 -0800 |
| commit | 92127c7a45d4d167d9b015a5f9de6b41ed66f1d0 (patch) | |
| tree | 4742cc36ff0b26c999365d1e84133886bb694096 /include | |
| parent | a0e9285233a32edf267d27cd03fe0056951422cf (diff) | |
| download | op-kernel-dev-92127c7a45d4d167d9b015a5f9de6b41ed66f1d0.zip op-kernel-dev-92127c7a45d4d167d9b015a5f9de6b41ed66f1d0.tar.gz | |
[PATCH] hrtimers: optimize softirq runqueues
The hrtimer softirq is called from the timer softirq every tick. Retrieve the
current time from xtime and wall_to_monotonic instead of calling
base->get_time() for each timer base. Store the time in the base structure
and provide a hook once clock source abstractions are in place and to keep the
code open for new base clocks.
Based on a patch from: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hrtimer.h | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 6401c31..64e2754 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -72,14 +72,16 @@ struct hrtimer { /** * struct hrtimer_base - the timer base for a specific clock * - * @index: clock type index for per_cpu support when moving a timer - * to a base on another cpu. - * @lock: lock protecting the base and associated timers - * @active: red black tree root node for the active timers - * @first: pointer to the timer node which expires first - * @resolution: the resolution of the clock, in nanoseconds - * @get_time: function to retrieve the current time of the clock - * @curr_timer: the timer which is executing a callback right now + * @index: clock type index for per_cpu support when moving a timer + * to a base on another cpu. + * @lock: lock protecting the base and associated timers + * @active: red black tree root node for the active timers + * @first: pointer to the timer node which expires first + * @resolution: the resolution of the clock, in nanoseconds + * @get_time: function to retrieve the current time of the clock + * @get_sofirq_time: function to retrieve the current time from the softirq + * @curr_timer: the timer which is executing a callback right now + * @softirq_time: the time when running the hrtimer queue in the softirq */ struct hrtimer_base { clockid_t index; @@ -88,7 +90,9 @@ struct hrtimer_base { struct rb_node *first; ktime_t resolution; ktime_t (*get_time)(void); + ktime_t (*get_softirq_time)(void); struct hrtimer *curr_timer; + ktime_t softirq_time; }; /* |
