From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753317Ab3IIPdx (ORCPT ); Mon, 9 Sep 2013 11:33:53 -0400 Received: from smtp.citrix.com ([66.165.176.89]:42334 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751113Ab3IIPdw (ORCPT ); Mon, 9 Sep 2013 11:33:52 -0400 X-IronPort-AV: E=Sophos;i="4.90,866,1371081600"; d="scan'208";a="52027276" Message-ID: <522DEA5C.6070608@citrix.com> Date: Mon, 9 Sep 2013 16:33:48 +0100 From: David Vrabel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20121215 Iceowl/1.0b1 Icedove/3.0.11 MIME-Version: 1.0 To: Konrad Rzeszutek Wilk CC: , , , , , , Subject: Re: [Xen-devel] [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v2) References: <1378739496-17468-1-git-send-email-konrad.wilk@oracle.com> In-Reply-To: <1378739496-17468-1-git-send-email-konrad.wilk@oracle.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.2.76] X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/09/13 16:11, Konrad Rzeszutek Wilk wrote: > > I had run some light performance tests with two guests - each over subscribed by > 2:1 and running a spinlock_hog wherein each CPU tries to get a lock. The machine > is a 4 CPU Intel, and each guest is running with 8 VCPUs. > > It is not a perfect test-case - for that I have asked our internal performance > engineer to test it out with various workloads and guests. > > However it does demonstrate that these patches do work and they do not > incur any performance regressions (and yes, they do show a performance > improvement). Good enough for me, let's get these into 3.12. David