linux-kernel - Re: [Intel-gfx] Interrupt latency on some 945GM platforms

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Message-ID: <20100923202112.7efa65a7@gmail.com>
Date:	Thu, 23 Sep 2010 20:21:12 +0200
From:	Paolo Ornati <ornati@...il.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Vasily Khoruzhick <anarsoul@...il.com>,
	Simon Farnsworth <simon.farnsworth@...lan.co.uk>,
	intel-gfx@...ts.freedesktop.org,
	Sitsofe Wheeler <sitsofe@...oo.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [Intel-gfx] Interrupt latency on some 945GM platforms

On Tue, 21 Sep 2010 15:56:53 -0700
Jesse Barnes <jbarnes@...tuousgeek.org> wrote:

> Can you guys try something like this?  My theory is that 945GM has some
> power management behavior we're failing to configure correctly.  If
> disabling it works, then it's likely related.

"processor.max_cstate=1" solves the problem too, tomorrow (it takes time
to be sure the problem is gone) I'll run with "processor.max_cstate=2"
and then I'll try with the patch alone.

-- 
	Paolo Ornati
	Linux 2.6.35.4 on x86_64
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