From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Subject: Re: [Qemu-devel] Ideas wiki for GSoC 2010 Date: Tue, 16 Mar 2010 16:33:54 +0000 (UTC) Message-ID: References: <20100310183023.6632aece@redhat.com> <4B9E2745.7060903@redhat.com> <20100315125313.GK9457@il.ibm.com> <20100315130310.GE13108@8bytes.org> <4B9E320E.7040605@redhat.com> <4B9E34E1.3090709@codemonkey.ws> <4B9E4D11.70402@redhat.com> <4B9F2130.6030903@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from lo.gmane.org ([80.91.229.12]:34407 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759115Ab0CPQeG (ORCPT ); Tue, 16 Mar 2010 12:34:06 -0400 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1NrZiW-0007h6-74 for kvm@vger.kernel.org; Tue, 16 Mar 2010 17:34:04 +0100 Received: from jfdmzpr03-ext.jf.intel.com ([134.134.139.72]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 16 Mar 2010 17:34:04 +0100 Received: from kvmuser by jfdmzpr03-ext.jf.intel.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 16 Mar 2010 17:34:04 +0100 Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity redhat.com> writes: > > On 03/16/2010 02:20 AM, Jason wrote: > > > > In comparing KVM 2.6.31.6b to XenServer 5.5.0, it seems KVM has fewer overall > > VMREADs and VMWRITEs, but there are a lot of VMWRITEs to Host FS_SEL, Host > > GS_SEL, Host FS_BASE, and Host GS_BASE that don't appear in Xen. > > Ugh, these should definitely be eliminated, they keep writing the same > value most of the time. > Sorry, I forgot to mention it would also be nice to reduce the unconditional writes to Host CR0 if the TS issue can still be dealt with.