From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: kvm somehow exempt from frequency scaling? Date: Wed, 11 Apr 2007 22:41:09 -0500 Message-ID: <461DAA55.4080805@codemonkey.ws> 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> <87fy76c1el.fsf@grogan.peloton> <461D1D3F.8050001@mr511.de> <87fy76ahkk.fsf@grogan.peloton> <461D2CFD.8040008@mr511.de> <87hcrm8too.fsf@grogan.peloton> <87k5wi741c.fsf@grogan.peloton> <461DA903.50902@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: David Abrahams , kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Avi Kivity Return-path: In-Reply-To: <461DA903.50902-atKUWr5tajBWk0Htik3J/w@public.gmane.org> 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 Avi Kivity wrote: > David Abrahams wrote: > >> on Wed Apr 11 2007, David Abrahams wrote: >> >> >> >>>> Does qemu behave differently if you use -no-kvm? >>>> >>>> >>> Haven't tried that one yet. >>> >>> >> Newsflash: yes, it does. The VM keeps using cycles at a normal rate >> even when not on a visible workspace. This problem appears to be >> KVM-specific. >> >> > > Amazing. > > Can you strace a hung vm and post the log? > I've heard of this occurring without KVM (although I don't recall if kqemu was involved). I've never been able to reproduce myself. An strace or core dump (via kill -SEGV) would be terribly useful in seeing what's going on. Regards, Anthony Liguori ------------------------------------------------------------------------- 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