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Message-ID: <44418197.7030900@mbligh.org>
Date: Sat, 15 Apr 2006 16:28:23 -0700
From: "Martin J. Bligh" <mbligh@mbligh.org>
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To: "Martin J. Bligh" <mbligh@google.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       apw@shadowen.org, Ingo Molnar <mingo@elte.hu>
Subject: Re: Clear performance regression on reaim7 in 2.6.15-git6
References: <4441452F.3060009@google.com>	<20060415141744.042231a8.akpm@osdl.org>	<44416616.10908@google.com>	<20060415145227.5d1249bd.akpm@osdl.org>	<444173EE.4060602@google.com> <20060415154518.6a5a0c52.akpm@osdl.org> <44417ADB.4070104@google.com>
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Martin J. Bligh wrote:
>>> It's still broken in 17-rc1 ... will send you a patch in a sec.
>>
>>
>>
>> I already have kconfigdebug-set-debug_mutex-to-off-by-default.patch 
>> queued up.
> 
> 
> OK. That explains why -mm2 bounced back at the end of this graph:
> http://test.kernel.org/perf/reaim.moe.png
> 
> But ... it's still way below what 2.6.15 was. There's another thunk
> down between 2.6.16 and 2.6.16-git18, AFAICS.

OK, I futzed with the graphs a bit. -git2 to -git3 definitely drops
off. I think -git6 to git7 does as well, though that's much more
difficult to discern amongst the noise. I'll take a look more.

Andy, if there's any way you could rerun all the -git ones on moe
with the CONFIG_DEBUG_MUTEXES stuff disabled, might be easier to see ...

M.