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| author | Thomas Gleixner <tglx@linutronix.de> | 2008-04-19 21:31:26 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-04-21 07:59:51 +0200 |
| commit | 259aae864ceeb2b34e7bafa1ce18d096a357fab2 (patch) | |
| tree | 5adb390434df0d95497763177d729c5d6cc98d20 /kernel/hrtimer.c | |
| parent | hrtimer: reduce calls to hrtimer_get_softirq_time() (diff) | |
| download | linux-259aae864ceeb2b34e7bafa1ce18d096a357fab2.tar.xz linux-259aae864ceeb2b34e7bafa1ce18d096a357fab2.zip | |
hrtimer: optimize the softirq time optimization
The previous optimization did not take the case into account where a
clock provides its own softirq_get_time() function.
Check for the availablitiy of the clock get time function first and
then check if we need to retrieve the time for both clocks via
hrtimer_softirq_gettime() to avoid a double evaluation of time in that
case as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/hrtimer.c')
| -rw-r--r-- | kernel/hrtimer.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 70d4adc74639..f78777abe769 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1254,14 +1254,13 @@ void hrtimer_run_queues(void) if (!base->first) continue; - if (gettime) { + if (base->get_softirq_time) + base->softirq_time = base->get_softirq_time(); + else if (gettime) { hrtimer_get_softirq_time(cpu_base); gettime = 0; } - if (base->get_softirq_time) - base->softirq_time = base->get_softirq_time(); - spin_lock(&cpu_base->lock); while ((node = base->first)) { |