From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tobias Geiger Subject: Re: A clocksource question Date: Fri, 12 Mar 2010 22:56:02 +0100 Message-ID: <201003122256.02254.tobias.geiger@vido.info> References: <4B962748.90609@invisiblethingslab.com> <4B9A8FDE.8070506@invisiblethingslab.com> <4B9AB126.1070406@goop.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <4B9AB126.1070406@goop.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Am Freitag 12 M=E4rz 2010 22:24:54 schrieb Jeremy Fitzhardinge: > On 03/12/2010 11:02 AM, Joanna Rutkowska wrote: > > Today I upgraded to xen 3.4.3-rc3 and tried the 2.6.32 kernel (the > > Micheal Young's one) -- the same problem :( >=20 > Good, in a way. I can't think of a reason it would change from .31 -> .3= 2. >=20 > Experiment of the moment: does changing the clocksource in > /sys/devices/system/clocksource/clocksource0/current_clocksource reset > the problem after killing the other domains? Ie, switch it from > xen->jiffies->xen for a while. >=20 kbpc2:~# cat /sys/devices/system/clocksource/clocksource0/current_clocksour= ce xen kbpc2:~# cat=20 /sys/devices/system/clocksource/clocksource0/available_clocksource xen kbpc2:~# echo "jiffies"=20 >/sys/devices/system/clocksource/clocksource0/current_clocksource kbpc2:~# dmesg | tail -1 [ 7898.642404] Override clocksource jiffies is not HRT compatible. Cannot s= witch=20 while in HRT/NOHZ mode kbpc2:~# Seems like it's not possible to switch to jiffies - however: kbpc2:~# zcat /proc/config.gz | grep NO_HZ # CONFIG_NO_HZ is not set but CONFIG_SCHED_HRTICK=3Dy Greetings Tobias > Thanks, > J >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >=20