From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Bad Performance Date: Wed, 28 Nov 2007 18:15:49 +0200 Message-ID: <474D9435.3040608@qumranet.com> References: <474D8F83.3010303@gmail.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: Darren Blaber Return-path: In-Reply-To: <474D8F83.3010303-Re5JQEeQqe8AvxtiuMwx3w@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 Darren Blaber wrote: > Hello, I was wondering if any of you were able to to help me figure out > why I am getting poor performance with kvm. When running windows as a > guest os, when windows is idle, using 1-2% cpu, the kvm process uses > about 20-30% cpu. Whenever I am doing any kind of activity (especially > disk activity) its shoots right up to 99%. Anyway, have a readprofile > snap shot as well as kvm stat output. > > 7383 hpet_rtc_timer_init 35.4952 > 2360 sys_timer_gettime 18.4375 > This is suspiciously high. Anything about hpet in dmesg? Can you try a .config without hpet? -- Any sufficiently difficult bug is indistinguishable from a feature. ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4