From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: XP smp using a lot of CPU Date: Mon, 18 May 2009 00:35:40 +0300 Message-ID: <4A10832C.7030308@redhat.com> References: <1242175298.15140.12.camel@iron.psg.net> <4A0B2C57.10900@rdsoftware.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Erik Rull Return-path: Received: from mx2.redhat.com ([66.187.237.31]:45658 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753717AbZEQVfo (ORCPT ); Sun, 17 May 2009 17:35:44 -0400 In-Reply-To: <4A0B2C57.10900@rdsoftware.de> Sender: kvm-owner@vger.kernel.org List-ID: Erik Rull wrote: > Hi all, > > very very interesting. > > I have a similar problem but the other way round. > If my XP runs up tp 100% CPU usage "top" on the linux host reports > "only" 33% cpu usage. I would expect around 50% because I only provide > one core for the guest. I already increased the process priority of > qemu and the io priority, nothing helped. The rest of the CPU is > nearly idle, no excessive disk access this time :-) > > Any Idea what this could be? What workload is the guest running? What is your host cpu type (/proc/cpuinfo)? -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.