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Date: Tue, 14 Sep 2010 23:41:11 +0100
From: Sitsofe Wheeler <sitsofe@yahoo.com>
To: Vasily Khoruzhick <anarsoul@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
        Venkatesh Pallipadi <venki@google.com>,
        Jesse Barnes <jbarnes@virtuousgeek.org>,
        intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: Interrupt latency on some 945GM platforms
Message-ID: <20100914224111.GA14467@sucs.org>
References: <201009132336.17310.anarsoul@gmail.com> <201009141109.41596.anarsoul@gmail.com> <alpine.LFD.2.00.1009141149380.2416@localhost6.localdomain6> <201009141529.53179.anarsoul@gmail.com>
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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/