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Commit f5754bfd authored by Frank Rowand's avatar Frank Rowand Committed by Ingo Molnar
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lockstat: Add usage info to Documentation/lockstat.txt 



Add usage info to Documentation/lockstat.txt

Signed-off-by: default avatarFrank Rowand <frank.rowand@am.sony.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <4B05BE7D.30500@am.sony.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 109d71c6

Documentation/lockstat.txt

+12 −0
Original line number Diff line number Diff line
@@ -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