linux-kernel - Re: Interrupt latency on some 945GM platforms

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Message-ID: <20100914224111.GA14467@sucs.org>
Date:	Tue, 14 Sep 2010 23:41:11 +0100
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Vasily Khoruzhick <anarsoul@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: Interrupt latency on some 945GM platforms

On Tue, Sep 14, 2010 at 03:29:48PM +0300, Vasily Khoruzhick wrote:
> В сообщении от 14 of September 2010 12:52:57 автор Thomas Gleixner написал:
> > Can you try with NOHZ enabled and the following on the kernel command line:
> > 
> >     processor.max_cstate=1
> 
> It works in this case (gears in glxgears move smoothly)
>  
> > If that works, then try
> > 
> >     processor.max_cstate=2
> > 
> 
> Nope, it doesn't work with max_cstate=2

Perhaps intel_idle is being used? Any mention of it in dmesg?

-- 
Sitsofe | http://sucs.org/~sits/
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