Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757853AbXLUQhw (ORCPT ); Fri, 21 Dec 2007 11:37:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753280AbXLUQhn (ORCPT ); Fri, 21 Dec 2007 11:37:43 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:34702 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753261AbXLUQhm (ORCPT ); Fri, 21 Dec 2007 11:37:42 -0500 Date: Fri, 21 Dec 2007 17:33:37 +0100 From: Ingo Molnar To: Christoph Lameter Cc: Steven Rostedt , LKML , Andrew Morton , Linus Torvalds , Peter Zijlstra , Christoph Hellwig , "Rafael J. Wysocki" Subject: Re: Major regression on hackbench with SLUB (more numbers) Message-ID: <20071221163337.GA8660@elte.hu> References: <1197049846.1645.68.camel@localhost.localdomain> <20071211143336.GA17866@elte.hu> <20071221120908.GA15926@elte.hu> <20071221122628.GA18002@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) 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 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1515 Lines: 36 * Christoph Lameter wrote: > On Fri, 21 Dec 2007, Ingo Molnar wrote: > > > and this is not the only regression: > > > > http://lkml.org/lkml/2007/10/4/290 > > > > _6%_ TPC-C regression. That's _a lot_ in TPC-C terms. > > > > and just like in this case there were very clear profiles posted. I > > proffer, reading back the whole thread, that if you fix hackbench ^^^^^^^^^^^^^^^^^^^^ > > you have fixed TPC-C as well. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > There are patches pending to address these issues. AFAICT Intel is > testing if the regression is still there. There is no way for me to > verify what is going on there and there is the constant difficulty of > getting detailed information about what is going on at Intel. Every > couple of month I get a result from that test. Its a really crappy > situation where a lot of confusing information is passed around. of course there is a way to find out, and that's why i mailed you: fix the hackbench regression and i'm quite sure you'll improve the TPC-C numbers as well. It shows the same kind of overhead in the profile and takes just a few seconds to run. Are your pending SLUB patches in 2.6.24-rc5-mm1 already? 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/