From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Guthro Subject: Re: [Xen-devel] Xen 3.1.1 -- initial patchqueue Date: Mon, 10 Sep 2007 08:18:53 -0400 Message-ID: <46E5362D.4020404@virtualiron.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-ppc-devel-bounces@lists.xensource.com Errors-To: xen-ppc-devel-bounces@lists.xensource.com To: Keir Fraser Cc: xen-ppc-devel , xen-devel , xen-ia64-devel List-Id: xen-devel@lists.xenproject.org Keir Fraser wrote: > On 10/9/07 13:03, "Ben Guthro" wrote: > > >> 15185-1f8fb764f843 >> http://xenbits.xensource.com/xen-unstable.hg?rev/1f8fb764f843 >> > I'm inclined not to backport this one. > > If I recall - It applied against our 3.1 tree without any backporting...we just exported, and applied it. It increased performance on Caneland machines greatly. Test results against our 3.1 based product below: At Ben's request, I did a quick evaluation of the APIC TPR patch for Caneland. I used yesterday's build to establish a baseline for booting, running SPECjbb2005, and netperf on a SMP XP guest. I then repeated the tests with a custom kernel. The patch showed significant improvement for 2 of the 3 tests I used. Here are the results: Test 20070816 Patch % Improvement Boot time - Seconds 62.6 40.5 35% SPECjbb2005 OPs/Sec 35216 35686 1% TCP XMIT (MBits/sec) 70.2 309.5 341% TCP RCV (MBits/Sec) 122.3 423.5 246% These tests were done on a Caneland, with 4 quad-core sockets and 32GB of memory. The guest is Windows XP Professional with SP2, 2 CPUs, 2GB memory. This afternoon, I'll repeat the experiment on a non-Caneland machine to see if there are any side effects. > The two Linux changesets are not applicable to 3.1. > Yes, of course...my mistake. I forgot to weed out my "unstable-only" patches from the list.