Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932580AbXBVIXy (ORCPT ); Thu, 22 Feb 2007 03:23:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751488AbXBVIXy (ORCPT ); Thu, 22 Feb 2007 03:23:54 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:52881 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751388AbXBVIXy (ORCPT ); Thu, 22 Feb 2007 03:23:54 -0500 Date: Thu, 22 Feb 2007 09:19:20 +0100 From: Ingo Molnar To: Eric Dumazet Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH, take 2] Speedup divides by cpu_power in scheduler Message-ID: <20070222081920.GA16089@elte.hu> References: <20070221211039.GA2672@beardog.cca.cpqcorp.net> <20070221191427.9b7cf4b0.akpm@linux-foundation.org> <45DD46E5.4060804@cosmosbay.com> <45DD5217.3000608@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <45DD5217.3000608@cosmosbay.com> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -5.3 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-5.3 required=5.9 tests=ALL_TRUSTED,BAYES_00 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts -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: 796 Lines: 24 * Eric Dumazet wrote: > Ingo suggested to rename cpu_power to __cpu_power to make clear it > should not be modified without changing its reciprocal value too. thanks, Acked-by: Ingo Molnar > I did not convert the divide in cpu_avg_load_per_task(), because > tracking nr_running changes may be not worth it ? We could use a > static table of 32 reciprocal values but it would add a conditional > branch and table lookup. not worth it i think. Lets wait for it to show up in an oprofile? (if ever) 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/