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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2014-05-02 12:13:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-05-04 20:46:32 +0200 |
| commit | 2779ac167b1a1bf8153dca9f3a141c6148c6b89f (patch) | |
| tree | c2b23576a2f7c4e680c8dd6430bae266cf6f5b56 /Documentation/timers | |
| parent | 0384dcae2b18db80c49117ac57ea15211ca48751 (diff) | |
| download | op-kernel-dev-2779ac167b1a1bf8153dca9f3a141c6148c6b89f.zip op-kernel-dev-2779ac167b1a1bf8153dca9f3a141c6148c6b89f.tar.gz | |
timer_stats/doc: Fix /proc/timer_stats documentation
Documentation/timers/timer_stats.txt claims:
"The readout of /proc/timer_stats automatically disables sampling. The sampled
information is kept until a new sample period is started. This allows multiple
readouts."
Some simple testing shows that reading from /proc/timer_stats
does not disable sampling. Looking back over past source code,
it appears that it never did.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Link: http://lkml.kernel.org/r/53636FB6.9060407@gmail.com
[ Small tidyup of the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/timers')
| -rw-r--r-- | Documentation/timers/timer_stats.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/timers/timer_stats.txt b/Documentation/timers/timer_stats.txt index 8abd40b..de835ee 100644 --- a/Documentation/timers/timer_stats.txt +++ b/Documentation/timers/timer_stats.txt @@ -39,9 +39,9 @@ To stop a sample period issue: The statistics can be retrieved by: # cat /proc/timer_stats -The readout of /proc/timer_stats automatically disables sampling. The sampled -information is kept until a new sample period is started. This allows multiple -readouts. +While sampling is enabled, each readout from /proc/timer_stats will see +newly updated statistics. Once sampling is disabled, the sampled information +is kept until a new sample period is started. This allows multiple readouts. Sample output of /proc/timer_stats: |
