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| author |   Andy Lutomirski <luto@mit.edu> | 2012-03-22 21:15:51 -0700 |
|---|---|---|
| committer |   John Stultz <john.stultz@linaro.org> | 2012-03-23 16:49:33 -0700 |
| commit | 91ec87d57fc38c529034e853687dfb7756de5406 (patch) | |
| tree | 4f88d6a7e0221bdd791a1de6d4c36b17da8337a2 /tools/perf/scripts/python/sched-migration.py | |
| parent | kernel-time: fix s/then/than/ spelling errors (diff) | |
| download | wireguard-linux-91ec87d57fc38c529034e853687dfb7756de5406.tar.xz wireguard-linux-91ec87d57fc38c529034e853687dfb7756de5406.zip | |
x86-64: Simplify and optimize vdso clock_gettime monotonic variants
We used to store the wall-to-monotonic offset and the realtime base.
It's faster to precompute the monotonic base.
This is about a 3% speedup on Sandy Bridge for CLOCK_MONOTONIC.
It's much more impressive for CLOCK_MONOTONIC_COARSE.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions