From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vasily Khoruzhick Subject: Re: Interrupt latency on some 945GM platforms Date: Fri, 24 Sep 2010 22:48:36 +0300 Message-ID: <201009242248.36554.anarsoul@gmail.com> References: <201009132336.17310.anarsoul@gmail.com> <201009162306.59508.anarsoul@gmail.com> <20100924123901.243c85e1@jbarnes-desktop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20100924123901.243c85e1@jbarnes-desktop> Sender: linux-kernel-owner@vger.kernel.org To: Jesse Barnes Cc: Thomas Gleixner , Sitsofe Wheeler , Venkatesh Pallipadi , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Len Brown List-Id: intel-gfx@lists.freedesktop.org On 24 of September 2010 22:39:01 Jesse Barnes wrote: > On Thu, 16 Sep 2010 23:06:46 +0300 >=20 > Vasily Khoruzhick wrote: > > =D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE= =D1=82 16 of September 2010 21:50:50 =D0=B0=D0=B2=D1=82=D0=BE=D1=80 Tho= mas Gleixner=20 =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB: > > > Ok. The problematic part of HPET was not the clocksource, it was = the > > > clock event device which failed to deliver interrupts occasionall= y. It > > > was worth a try at least. > >=20 > > Hm, it seems that jerky glxgears is not related to jerky keyboard e= vents. > > 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. >=20 > Len just had me try a few things too: > - maxcpus=3D1 lets things work > - offlining cpu1 at runtime (echo 0 >=20 > > /sys/devices/system/cpu/cpu1/online) lets things work >=20 > - binding the i915 interrupt to cpu 0 does *not* help >=20 > Vasily and Paolo, do you both have Atom CPUs with hyperthreading > enabled? Nope, I have Core2Duo T5500, dual-core, no hyperthreading :)