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From: Vasily Khoruzhick <anarsoul@gmail.com>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: Interrupt latency on some 945GM platforms
Date: Fri, 24 Sep 2010 22:48:36 +0300
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Cc: Thomas Gleixner <tglx@linutronix.de>, Sitsofe Wheeler <sitsofe@yahoo.com>,
        Venkatesh Pallipadi <venki@google.com>,
        intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Len Brown <lenb@kernel.org>
References: <201009132336.17310.anarsoul@gmail.com> <201009162306.59508.anarsoul@gmail.com> <20100924123901.243c85e1@jbarnes-desktop>
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On 24 of September 2010 22:39:01 Jesse Barnes wrote:
> On Thu, 16 Sep 2010 23:06:46 +0300
> 
> Vasily Khoruzhick <anarsoul@gmail.com> wrote:
> > В сообщении от 16 of September 2010 21:50:50 автор Thomas Gleixner 
написал:
> > > Ok. The problematic part of HPET was not the clocksource, it was the
> > > clock event device which failed to deliver interrupts occasionally. It
> > > was worth a try at least.
> > 
> > Hm, it seems that jerky glxgears is not related to jerky keyboard events.
> > Keyboard is jerky only in konsole (kde terminal emulator), it seems
> > something happened it seems that font rendering performance is much
> > worse in latest xf86-video-intel than in xf86-video-intel-2.12.0.
> 
> Len just had me try a few things too:
>   - maxcpus=1 lets things work
>   - offlining cpu1 at runtime (echo 0
> 
>     > /sys/devices/system/cpu/cpu1/online) lets things work
> 
>   - binding the i915 interrupt to cpu 0 does *not* help
> 
> Vasily and Paolo, do you both have Atom CPUs with hyperthreading
> enabled?

Nope, I have Core2Duo T5500, dual-core, no hyperthreading :)