Commit-ID: f5754bfd107b08edddaf871d676ec6fe0792d07a Gitweb: http://git.kernel.org/tip/f5754bfd107b08edddaf871d676ec6fe0792d07a Author: Frank Rowand <frank.rowand@xxxxxxxxxxx> AuthorDate: Thu, 19 Nov 2009 13:54:05 -0800 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Sun, 6 Dec 2009 13:20:02 +0100 lockstat: Add usage info to Documentation/lockstat.txt Add usage info to Documentation/lockstat.txt Signed-off-by: Frank Rowand <frank.rowand@xxxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> LKML-Reference: <4B05BE7D.30500@xxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- Documentation/lockstat.txt | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/Documentation/lockstat.txt b/Documentation/lockstat.txt index 9cb9138..65f4c79 100644 --- a/Documentation/lockstat.txt +++ b/Documentation/lockstat.txt @@ -62,8 +62,20 @@ applicable). It also tracks 4 contention points per class. A contention point is a call site that had to wait on lock acquisition. + - CONFIGURATION + +Lock statistics are enabled via CONFIG_LOCK_STATS. + - USAGE +Enable collection of statistics: + +# echo 1 >/proc/sys/kernel/lock_stat + +Disable collection of statistics: + +# echo 0 >/proc/sys/kernel/lock_stat + Look at the current lock statistics: ( line numbers not part of actual output, done for clarity in the explanation -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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