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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-10 13:40:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-10 16:55:26 +0200 |
| commit | bd2b5b12849a3446abad0b25e920f86f5480b309 (patch) | |
| tree | b0eacf6002f2015c0483390619a3f874bcb7e7d2 /fs/gfs2/inode.h | |
| parent | dc81081b2d9a6a9d64dad1bef1e5fc9fb660e53e (diff) | |
| download | kernel_samsung_espresso10-bd2b5b12849a3446abad0b25e920f86f5480b309.zip kernel_samsung_espresso10-bd2b5b12849a3446abad0b25e920f86f5480b309.tar.gz kernel_samsung_espresso10-bd2b5b12849a3446abad0b25e920f86f5480b309.tar.bz2 | |
perf_counter: More aggressive frequency adjustment
Also employ the overflow handler to adjust the frequency, this results
in a stable frequency in about 40~50 samples, instead of that many ticks.
This also means we can start sampling at a sample period of 1 without
running head-first into the throttle.
It relies on sched_clock() to accurately measure the time difference
between the overflow NMIs.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/gfs2/inode.h')
0 files changed, 0 insertions, 0 deletions