From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Abrahams Subject: Re: kvm somehow exempt from frequency scaling? Date: Tue, 10 Apr 2007 00:24:48 -0400 Message-ID: <87mz1gj1pr.fsf@grogan.peloton> References: <87veg6bck6.fsf@grogan.peloton> <4619EB19.20305@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Avi Kivity Return-path: In-Reply-To: <4619EB19.20305-atKUWr5tajBWk0Htik3J/w@public.gmane.org> (Avi Kivity's message of "Mon\, 09 Apr 2007 10\:28\:25 +0300") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org on Mon Apr 09 2007, Avi Kivity wrote: > David Abrahams wrote: >> I'm using the ondemand governor on my core duo laptop. Even when kvm >> is taking 99% of the CPU, somehow instead of the ondemand governor >> kicking it up to 2GHz, the CPU is still running at half speed. What's >> up with that? Anybody know? >> >> > > Strange. Does a simple bash busy-loop (while :; do :; done) work? The frequency goes up to 1.67Ghz. I've seen it happen that the CPU is pegged at 100% in the WinXP Guest OS's task manager with my frequency scaling never hitting the max of 2.17 Ghz. Right now I'm see variable CPU load on the guest averaging around 75%, and it does cause frequency scaling to hit the max every once in a while. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com Don't Miss BoostCon 2007! ==> http://www.boostcon.com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV