diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-12-09 15:45:29 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-12-09 17:14:38 +0000 |
| commit | c51626ccb660c777da8d84bb425de0d590864448 (patch) | |
| tree | be2e77efeb536cefa5620200255b4f5b76df63ce | |
| parent | c22197f25bc0419d9f2abfcc978df5ef439feb47 (diff) | |
sna: Use the coarse monotonic clock to coalesce wakeup events
For the long interval events (such as expiring the caches), we do not
need precise timing and so can use a coarse timer to allow the system
to coalesce and reduce wakeup events.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | src/sna/sna.h | 1 | ||||
| -rw-r--r-- | src/sna/sna_accel.c | 7 |
2 files changed, 8 insertions, 0 deletions
diff --git a/src/sna/sna.h b/src/sna/sna.h index bd6c8a19..3c5d56b3 100644 --- a/src/sna/sna.h +++ b/src/sna/sna.h @@ -216,6 +216,7 @@ enum { INACTIVE_TIMER, NUM_TIMERS }; +#define NUM_FINE_TIMERS 1 struct sna { ScrnInfoPtr scrn; diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c index cffac538..c55ad7df 100644 --- a/src/sna/sna_accel.c +++ b/src/sna/sna_accel.c @@ -8513,8 +8513,15 @@ static void sna_accel_create_timers(struct sna *sna) { int id; +#ifdef CLOCK_MONOTONICE_COARSE + for (id = 0; id < NUM_FINE_TIMERS; id++) + sna->timer[id] = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); + for (; id < NUM_TIMERS; id++) + sna->timer[id] = timerfd_create(CLOCK_MONOTONIC_COARSE, TFD_NONBLOCK); +#else for (id = 0; id < NUM_TIMERS; id++) sna->timer[id] = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); +#endif } #else static void sna_accel_create_timers(struct sna *sna) |