From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752758AbYHRGwt (ORCPT ); Mon, 18 Aug 2008 02:52:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750986AbYHRGwj (ORCPT ); Mon, 18 Aug 2008 02:52:39 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:47809 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750924AbYHRGwi (ORCPT ); Mon, 18 Aug 2008 02:52:38 -0400 Date: Mon, 18 Aug 2008 08:52:20 +0200 From: Ingo Molnar To: "Zhang, Yanmin" Cc: a.p.zijlstra@chello.nl, Linux Kernel Mailing List Subject: Re: scale sysctl_sched_shares_ratelimit with nr_cpus Message-ID: <20080818065220.GA2711@elte.hu> References: <37E52D09333DE2469A03574C88DBF40F024EBD2F@pdsmsx414.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <37E52D09333DE2469A03574C88DBF40F024EBD2F@pdsmsx414.ccr.corp.intel.com> User-Agent: Mutt/1.5.18 (2008-05-17) 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 * Zhang, Yanmin wrote: > Ingo, > > My linux mailbox is locked, so I send from my another mail box. > > I tested the patch of scale sysctl_sched_shares_ratelimit with nr_cpus > on 16-core tigerton by volanoMark. CONFIG_GROUP_SCHED=y. Comparing > with pure 2.6.27-rc3, the patched kernel has about 15% improvement, > and it seems volanoMark runs more smoothly with the patched kernel. cool. It's already upstream (post-rc3 commit): 55cd534: sched: scale sysctl_sched_shares_ratelimit with nr_cpus Ingo