Commit 2779ac16 authored May 02, 2014 by Michael Kerrisk Committed by Ingo Molnar May 04, 2014

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>

parent 0384dcae

Documentation/timers/timer_stats.txt

+3 −3

Original line number	Diff line number	Diff line
		@@ -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: