[Intel-gfx] Interrupt latency on some 945GM platforms

[Jesse Barnes]

On Fri, 24 Sep 2010 22:48:36 +0300
Vasily Khoruzhick <anarsoul at gmail.com> wrote:

> On 24 of September 2010 22:39:01 Jesse Barnes wrote:
> > On Thu, 16 Sep 2010 23:06:46 +0300
> > 
> > Vasily Khoruzhick <anarsoul at 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 :)

Hm, well there goes the theory about Atom HT...

-- 
Jesse Barnes, Intel Open Source Technology Center