Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754625AbXLKOeS (ORCPT ); Tue, 11 Dec 2007 09:34:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753245AbXLKOeE (ORCPT ); Tue, 11 Dec 2007 09:34:04 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:33065 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751841AbXLKOeB (ORCPT ); Tue, 11 Dec 2007 09:34:01 -0500 Date: Tue, 11 Dec 2007 15:33:36 +0100 From: Ingo Molnar To: Steven Rostedt Cc: LKML , Christoph Lameter , Andrew Morton , Linus Torvalds , Peter Zijlstra , Christoph Hellwig Subject: Re: Major regression on hackbench with SLUB (more numbers) Message-ID: <20071211143336.GA17866@elte.hu> References: <1197049846.1645.68.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1197049846.1645.68.camel@localhost.localdomain> 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: 1332 Lines: 30 * Steven Rostedt wrote: > Hackbench seems to show this regression the most. In my tests I didn't > see much change with kernel builds and such, but the focus was on > scheduling not memory management. I'll run my kernel tests next for > both SLAB and SLUB and see if there's any difference there. i just ran various benchmarks on an 8-way (8x 700 MHz Xeon, 4GB RAM): AVG v2.6.24.slab v2.6.24.slub [ smaller is better ] ----------------------------------------- mmap: 1052.66 1049.33 ( 0%) ctx-2: 4.32 4.30 ( 0%) select: 41.95 43.69 ( 4%) proc-exec: 394.45 391.92 ( 0%) hackbench-10: 1.12 2.99 (166%) hackbench-20: 2.04 6.67 (226%) hackbench-50: 5.03 17.50 (247%) and hackbench overhead stands out, by a huge margin. Other stuff is within measurement noise. Neither SLUB nor SLAB debugging was turned on, all other debugging options were off too. 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/