From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: Performance issue Date: Tue, 27 Nov 2012 16:54:47 +0200 Message-ID: <20121127145447.GJ12969@redhat.com> References: <20121125151949.GD25516@redhat.com> <20121127122009.GV25516@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: kvm@vger.kernel.org, vrozenfe@redhat.com To: George-Cristian =?utf-8?Q?B=C3=AErzan?= Return-path: Received: from mx1.redhat.com ([209.132.183.28]:32669 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753280Ab2K0Oyu convert rfc822-to-8bit (ORCPT ); Tue, 27 Nov 2012 09:54:50 -0500 Content-Disposition: inline In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Nov 27, 2012 at 02:29:20PM +0200, George-Cristian B=C3=AErzan w= rote: > On Tue, Nov 27, 2012 at 2:20 PM, Gleb Natapov wrote= : > > On Mon, Nov 26, 2012 at 09:31:19PM +0200, George-Cristian B=C3=AErz= an wrote: > >> On Sun, Nov 25, 2012 at 6:17 PM, George-Cristian B=C3=AErzan wrote: > >> > On Sun, Nov 25, 2012 at 5:19 PM, Gleb Natapov = wrote: > >> >> What Windows is this? Can you try changing "-cpu host" to "-cpu > >> >> host,+hv_relaxed"? > >> > > >> > This is on Windows Server 2008 R2 (sorry, forgot to mention that= I > >> > guess), and I can try it tomorrow (US time), as getting a stream= my > >> > way depends on complicated stuff. I will though, and let you kno= w how > >> > it goes. > >> > >> I changed that, no difference. > >> > >> > > Heh, I forgot that the part that should make difference is not yet > > upstream :( >=20 > We can try recompiling kvm/qemu with some patches, if that'd help. At > this point, anything is on the table except changing Windows and the > hardware :-) Vadim do you have Hyper-v reference timer patches for KVM to try? >=20 > Also, it might be that the software doing the actual work is not well > written, but even so... >=20 > -- > George-Cristian B=C3=AErzan -- Gleb.