From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Abrahams Subject: Re: kvm somehow exempt from frequency scaling? Date: Wed, 11 Apr 2007 12:37:54 -0400 Message-ID: <87fy76c1el.fsf@grogan.peloton> References: <87veg6bck6.fsf@grogan.peloton> <4619EB19.20305@qumranet.com> <87mz1gj1pr.fsf@grogan.peloton> <461B3CBB.3040401@qumranet.com> <461B63E4.3080804@mr511.de> <87hcrnciom.fsf@grogan.peloton> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: 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 Wed Apr 11 2007, David Abrahams wrote: > on Tue Apr 10 2007, Michael Riepe wrote: > >> Hi! >> >> Avi Kivity wrote: >> >>> Sounds like ondemand is broken. >> >> Maybe it only switches when the load rises in user space. With KVM, it >> appears in system space. Got to cross-check that on my Core Duo. > > More data: it definitely seems to make a difference whether the VM's > desktop is showing. If I switch Gnome workspaces so it's not visible, > it doesn't seem to drive the frequency up. In fact, kvm doesn't seem to make any progress at all :(. I'm currently going through the "microsoft update" dance on a VM there, and I literally left for an hour during which there was no progress because the QEMU window wasn't visible. Even stranger, if I minimize the QEMU window and then switch workspaces, it gets plenty of cycles. -- 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