From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752074AbYKSToU (ORCPT ); Wed, 19 Nov 2008 14:44:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752476AbYKSToI (ORCPT ); Wed, 19 Nov 2008 14:44:08 -0500 Received: from nlpi053.sbcis.sbc.com ([207.115.36.82]:52478 "EHLO nlpi053.prodigy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752136AbYKSToG (ORCPT ); Wed, 19 Nov 2008 14:44:06 -0500 Date: Wed, 19 Nov 2008 13:43:12 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@quilx.com To: Ingo Molnar 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 In-Reply-To: <20081117090648.GG28786@elte.hu> Message-ID: References: <1ScKicKnTUE.A.VxH.DIHIJB@chimera> <20081117090648.GG28786@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Score: -2.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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! From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Date: Wed, 19 Nov 2008 13:43:12 -0600 (CST) Message-ID: References: <1ScKicKnTUE.A.VxH.DIHIJB@chimera> <20081117090648.GG28786@elte.hu> Mime-Version: 1.0 Return-path: In-Reply-To: <20081117090648.GG28786-X9Un+BFzKDI@public.gmane.org> Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: TEXT/PLAIN; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Ingo Molnar Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Mike Galbraith , Peter Zijlstra 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!