From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756090AbZBZLTV (ORCPT ); Thu, 26 Feb 2009 06:19:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753751AbZBZLTG (ORCPT ); Thu, 26 Feb 2009 06:19:06 -0500 Received: from courier.cs.helsinki.fi ([128.214.9.1]:55479 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753410AbZBZLTE (ORCPT ); Thu, 26 Feb 2009 06:19:04 -0500 Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2 From: Pekka Enberg To: Mel Gorman Cc: Lin Ming , Linux Memory Management List , Rik van Riel , KOSAKI Motohiro , Christoph Lameter , Johannes Weiner , Nick Piggin , Linux Kernel Mailing List , Zhang Yanmin , Peter Zijlstra In-Reply-To: <20090226110336.GC32756@csn.ul.ie> References: <1235477835-14500-1-git-send-email-mel@csn.ul.ie> <1235639427.11390.11.camel@minggr> <20090226110336.GC32756@csn.ul.ie> Date: Thu, 26 Feb 2009 13:18:59 +0200 Message-Id: <1235647139.16552.34.camel@penberg-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit X-Mailer: Evolution 2.22.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2009-02-26 at 11:03 +0000, Mel Gorman wrote: > On Thu, Feb 26, 2009 at 05:10:27PM +0800, Lin Ming wrote: > > We tested this v2 patch series with 2.6.29-rc6 on different machines. > > > > Wonderful, thanks. > > > 4P qual-core 2P qual-core 2P qual-core HT > > tigerton stockley Nehalem > > ------------------------------------------------ > > tbench +3% +2% 0% > > Nice. > > > oltp -2% 0% 0% > > This is a big disappointment and somewhat confusing that it is so > severe. For sysbench I was seeing on six different machines; > > 50834.14 51763.08 1.79% > 61852.08 61966.58 0.18% > 5935.98 5980.06 0.74% > 29227.78 30167.72 3.12% > 66702.67 66534.76 -0.25% > 26643.18 26542.59 -0.38% > > So, two smallish regressions but mainly gains. Then again, I'm becoming > more and more convinced that sysbench doesn't really represent a proper > OLTP workload. > > I'd like to understand more how the page allocator at least was being used > during your tests. Would it be possible to get a full profile (including > instruction if possible and the vmlinux file) for both kernels please? > > If you can get the profiles, confirm the regression is still there as > sometimes profiling can alter the outcome. Even if this happens, the > profile will tell me where time is being spent. > > > aim7 0% 0% 0% > > specjbb2005 +3% 0% 0% > > hackbench 0% 0% 0% > > > > netperf: > > TCP-S-112k 0% -1% 0% > > TCP-S-64k 0% -1% +1% > > TCP-RR-1 0% 0% +1% > > UDP-U-4k -2% 0% -2% > > Pekka, for this test was SLUB or the page allocator handling the 4K > allocations? The page allocator. The pass-through revert is not in 2.6.29-rc6 and I won't be sending it until 2.6.30 opens up. > > > UDP-U-1k +3% 0% 0% > > UDP-RR-1 0% 0% 0% > > UDP-RR-512 -1% 0% +1% > > > > Lin Ming > > > > Thanks a million for testing. >