Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753923AbYKSUPY (ORCPT ); Wed, 19 Nov 2008 15:15:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752467AbYKSUPJ (ORCPT ); Wed, 19 Nov 2008 15:15:09 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:60342 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752328AbYKSUPI (ORCPT ); Wed, 19 Nov 2008 15:15:08 -0500 Date: Wed, 19 Nov 2008 21:14:44 +0100 From: Ingo Molnar To: Christoph Lameter Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Mike Galbraith , Peter Zijlstra Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Message-ID: <20081119201444.GB4765@elte.hu> References: <1ScKicKnTUE.A.VxH.DIHIJB@chimera> <20081117090648.GG28786@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00,DNS_FROM_SECURITYSAGE autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 0.0 DNS_FROM_SECURITYSAGE RBL: Envelope sender in blackholes.securitysage.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1279 Lines: 35 * Christoph Lameter wrote: > On Mon, 17 Nov 2008, Ingo Molnar wrote: > > > Christoph, as per the recent analysis of Mike: > > > > http://fixunix.com/kernel/556867-regression-benchmark-throughput-loss-a622cf6-f7160c7-pull.html > > > > all scheduler components of this regression have been eliminated. > > > > In fact his numbers show that scheduler speedups since 2.6.22 have > > offset and hidden most other sources of tbench regression. (i.e. the > > scheduler portion got 5% faster, hence it was able to offset a > > slowdown of 5% in other areas of the kernel that tbench triggers) > > Ok will rerun the tests tomorrow. Just got back from SC08 need some > time to catch up. > > Looks like a lot of work was done on this issue. Thanks! You might also want to try net-next: [remote "net-next"] url = git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6.git fetch = +refs/heads/*:refs/remotes/net-next/* Some good stuff is in there too, impacting this workload. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/