From: Frank Rowand <frank.rowand@am.sony.com>
To: peterz@infradead.org, mingo@redhat.com
Cc: tom.leiming@gmail.com, linux-kernel@vger.kernel.org
Subject: [PATCH] LOCKSTAT: Add usage info to Documentation/lockstat.txt
Date: Thu, 19 Nov 2009 13:54:05 -0800 [thread overview]
Message-ID: <4B05BE7D.30500@am.sony.com> (raw)
Add usage info to Documentation/lockstat.txt
Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
---
Documentation/lockstat.txt | 12 12 + 0 - 0 !
1 files changed, 12 insertions(+)
Index: b/Documentation/lockstat.txt
===================================================================
--- 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
next reply other threads:[~2009-11-19 21:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-19 21:54 Frank Rowand [this message]
2009-12-06 13:04 ` [tip:core/urgent] lockstat: Add usage info to Documentation/lockstat.txt tip-bot for Frank Rowand
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