Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992899AbXEBIPy (ORCPT ); Wed, 2 May 2007 04:15:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992908AbXEBIPx (ORCPT ); Wed, 2 May 2007 04:15:53 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:40822 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992899AbXEBIPw (ORCPT ); Wed, 2 May 2007 04:15:52 -0400 Date: Wed, 2 May 2007 10:13:56 +0200 From: Ingo Molnar To: Gene Heskett Cc: Mike Galbraith , linux-kernel@vger.kernel.org, Linus Torvalds , Andrew Morton , Con Kolivas , Nick Piggin , Arjan van de Ven , Peter Williams , Thomas Gleixner , caglar@pardus.org.tr, Willy Tarreau , Mark Lord , Zach Carter , buddabrod , Balbir Singh Subject: Re: [patch] CFS scheduler, -v8 Message-ID: <20070502081356.GA21827@elte.hu> References: <20070501212223.GA29867@elte.hu> <1178087834.8640.7.camel@Homer.simpson.net> <200705020403.35385.gene.heskett@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200705020403.35385.gene.heskett@gmail.com> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1662 Lines: 41 * Gene Heskett wrote: > > I noticed a (harmless) bounds warning triggered by the reduction in > > size of array->bitmap. Patchlet below. > > I just checked my logs, and it appears my workload didn't trigger this > one Mike. [...] yeah: this is a build-time warning and it needs a newer/smarter gcc to notice that provably redundant piece of code. It's a harmless thing - but nevertheless Mike's fix is a nice little micro-optimization as well: it always bothered me a bit that at 140 priority levels we were _just_ past the 128 bits boundary by 12 bits. Now on 64-bit boxes it's just two 64-bit words to cover all 100 priority levels of RT tasks. > [...] And so far, v8 is working great here. And that great is in my > best "Tony the Tiger" voice, stolen shamelessly from the breakfast > cereal tv commercial of 30+ years ago. :) heh :-) > Ingo asked for a 0-100 rating, where 0 is mainline as I recall it, and > 100 is the best of the breed. I'll give this one a 100 till something > better shows up. nice - and you arent even using any OpenGL games ;) The 0-100 rating is really useful to me so that i can see the impact of regressions (if any) and it's also one single number representing the subjective impression - that way it's easier to keep tab of things. btw., do you still renice kmail slightly, or does it now work out of box with default nice 0? 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/