From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: Windows Server 2008R2 KVM guest performance issues Date: Tue, 27 Aug 2013 11:44:42 +0300 Message-ID: <20130827084442.GF22899@redhat.com> References: <521BA934.3050507@gameservers.com> <521C52A8.40801@redhat.com> <20130827073833.GD22899@redhat.com> <521C656C.9090208@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Brian Rak , kvm@vger.kernel.org To: Paolo Bonzini Return-path: Received: from mx1.redhat.com ([209.132.183.28]:36507 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752692Ab3H0IpW (ORCPT ); Tue, 27 Aug 2013 04:45:22 -0400 Content-Disposition: inline In-Reply-To: <521C656C.9090208@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Aug 27, 2013 at 10:38:04AM +0200, Paolo Bonzini wrote: > Il 27/08/2013 09:38, Gleb Natapov ha scritto: > > On Tue, Aug 27, 2013 at 09:18:00AM +0200, Paolo Bonzini wrote: > >>> I've captured 20,000 lines of kvm trace output. This can be found > >>> https://gist.github.com/devicenull/fa8f49d4366060029ee4/raw/fb89720d34b43920be22e3e9a1d88962bf305da8/trace > >> > >> The guest is doing quite a lot of exits per second, mostly to (a) access > >> the ACPI timer > > I see a lot of PM timer access not ACPI timer. The solution for that is > > the patchset Brian linked. > > ACPI timer = PM timer, no? > My brain often substitute ACPI with APIC, yes you are right. -- Gleb.