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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-02-15 12:41:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-16 13:30:57 +0100 |
| commit | ba3dd36c6775264ee6e7354ba1aabcd6e86d7298 (patch) | |
| tree | f48441ff3179a91b4acde6c785726a34e6dc856a /Documentation/trace/ftrace-design.txt | |
| parent | 163ec4354a5135c6c38c3f4a9b46a31900ebdf48 (diff) | |
| download | linux-ba3dd36c6775264ee6e7354ba1aabcd6e86d7298.tar.gz linux-ba3dd36c6775264ee6e7354ba1aabcd6e86d7298.tar.bz2 linux-ba3dd36c6775264ee6e7354ba1aabcd6e86d7298.zip | |
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>
Diffstat (limited to 'Documentation/trace/ftrace-design.txt')
0 files changed, 0 insertions, 0 deletions