From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Subject: Re: high load with win7 & usb tablet Date: Fri, 10 Sep 2010 13:47:47 +0200 Message-ID: <4C8A1AE3.8030705@redhat.com> References: <4C80E839.50604@msgid.tls.msk.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: KVM list To: Michael Tokarev Return-path: Received: from mx1.redhat.com ([209.132.183.28]:46347 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753316Ab0IJLry (ORCPT ); Fri, 10 Sep 2010 07:47:54 -0400 In-Reply-To: <4C80E839.50604@msgid.tls.msk.ru> Sender: kvm-owner@vger.kernel.org List-ID: On 09/03/10 14:21, Michael Tokarev wrote: > Hello. > > I noticed that window7, unlike windowsXP as I played with > previously, poses quite high load on host when idle. On > my machine, host cpu usage is about 25% when one single-cpu > win7 guest is running with "-usbdevice tablet" option. > Here's a typical kvm_stats when such a guest is idling: Hi Michael, I am curious, the XP numbers you are referring to, are they against the same version of KVM/QEMU or is it something you saw in the past? It would be interesting to track down whether this idle time consumption is only with win7 or if it happens with all versions of windows, as opposed to being a general problem in current KVM/QEMU. Cheers, Jes