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

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Date:	Wed, 15 Sep 2010 10:07:09 +0300
From:	Vasily Khoruzhick <anarsoul@...il.com>
To:	Sitsofe Wheeler <sitsofe@...oo.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

В сообщении от 15 of September 2010 01:41:11 автор Sitsofe Wheeler написал:
> 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?

Nope, acpi_idle is being used, intel_idle doesn't support my CPU (it's c2d 
t5500):

[    0.653279] intel_idle: does not run on family 6 model 15

Regards
Vasily

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