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

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Message-ID: <20100913145952.2646a2f8@jbarnes-desktop>
Date:	Mon, 13 Sep 2010 14:59:52 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Vasily Khoruzhick <anarsoul@...il.com>
Cc:	intel-gfx@...ts.freedesktop.org,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Interrupt latency on some 945GM platforms

On Tue, 14 Sep 2010 00:52:31 +0300
Vasily Khoruzhick <anarsoul@...il.com> wrote:

> В сообщении от 14 of September 2010 00:46:32 автор Jesse Barnes написал:
> 
> > Yes, you can set vblank_mode=0 in your environment or drirc.  At least
> > I think 0 is no vsync. :)
> 
> That doesn't help, glxgears shows ~1000fps, but it's output is jerky.

Is it smooth with clocksource=tsc?  I wonder if the GPU batch
interrupts are also getting delayed, and possibly timer ticks...

-- 
Jesse Barnes, Intel Open Source Technology Center
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