tree f48441ff3179a91b4acde6c785726a34e6dc856a
parent 163ec4354a5135c6c38c3f4a9b46a31900ebdf48
author Peter Zijlstra <a.p.zijlstra@chello.nl> 1297770106 +0100
committer Ingo Molnar <mingo@elte.hu> 1297859457 +0100

perf: Optimize hrtimer events

There is no need to re-initialize the hrtimer every time we start it,
so don't do that (shaves a few cycles). Also, since we know hrtimers
run at a fixed rate (nanoseconds) we can pre-compute the desired
frequency at which they tick. This avoids us having to go through the
whole adaptive frequency feedback logic (shaves another few cycles).

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1297448589.5226.47.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>