Date: Wed, 3 Jan 2007 17:27:09 -0800
To: "Chen, Tim C" <tim.c.chen@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       "Siddha, Suresh B" <suresh.b.siddha@intel.com>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       Steven Rostedt <rostedt@goodmis.org>,
       Thomas Gleixner <tglx@linutronix.de>,
       Daniel Walker <dwalker@mvista.com>
Subject: Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch
Message-ID: <20070104012709.GC31943@gnuppy.monkey.org>
References: <20070104010049.GA31943@gnuppy.monkey.org> <9D2C22909C6E774EBFB8B5583AE5291C01A4FBE5@fmsmsx414.amr.corp.intel.com>
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From: Bill Huey (hui) <billh@gnuppy.monkey.org>
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On Wed, Jan 03, 2007 at 05:11:04PM -0800, Chen, Tim C wrote:
> Bill Huey (hui) wrote:
> > 
> > Thanks, the numbers look a bit weird in that the first column should
> > have a bigger number of events than that second column since it is a
> > special case subset. Looking at the lock_stat_note() code should show
> > that to be the case. Did you make a change to the output ?
> 
> No, I did not change the output.  I did reset to the contention content
> 
> by doing echo "0" > /proc/lock_stat/contention.
> 
> I noticed that the first column get reset but not the second column. So
> the reset code probably need to be checked.

This should have the fix. 

	http://mmlinux.sf.net/public/patch-2.6.20-rc2-rt2.3.lock_stat.patch

If you can rerun it and post the results, it'll hopefully show the behavior 
of that lock acquisition better.

Thanks

bill

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