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Re: /proc/lock_stat "stuck"
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From:
Peter Zijlstra <a.p.zijlstra@...>
To: Alan D. Brunelle <Alan.Brunelle@...>
Cc: linux-kernel@vger.kernel.org <linux-kernel@...>
Subject:
Re: /proc/lock_stat "stuck"
Date: Wednesday, May 21, 2008 - 5:16 am
On Tue, 2008-05-20 at 14:09 -0400, Alan D. Brunelle wrote:
quoted text
> I'm attempting to use /proc/lock_stat to gather some information during > some benchmarking runs, but what I find happens is as follows: > > 1. I boot the system - 2.6.26-rc3 kernel + CONFIG_LOCK_STAT=y > > 2. I can then look at /proc/lock_stat, and it has valid-looking values > > 3. I wait a while, do some stuff, but when I look at /proc/lock_stat > again the values have not changed. > > 4. If I clear the counters - echo 0 > /proc/lock_stat - the counters > never increase, and no information besides the headers are output when I > cat /proc/lock_stat. > > > Is there something that one needs to do to get counter updates?
Did you get lockdep warnings? Those disable all lock debugging, including lockstat. --
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Messages in current thread:
/proc/lock_stat "stuck"
, Alan D. Brunelle
, (Tue May 20, 2:09 pm)
Re: /proc/lock_stat "stuck"
, Peter Zijlstra
, (Wed May 21, 5:16 am)
Re: /proc/lock_stat "stuck"
, Alan D. Brunelle
, (Wed May 21, 7:09 am)
Re: /proc/lock_stat "stuck"
, Peter Zijlstra
, (Wed May 21, 7:29 am)
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