From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753832AbXDNQPO (ORCPT ); Sat, 14 Apr 2007 12:15:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753845AbXDNQPO (ORCPT ); Sat, 14 Apr 2007 12:15:14 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:39540 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753832AbXDNQPM (ORCPT ); Sat, 14 Apr 2007 12:15:12 -0400 Date: Sat, 14 Apr 2007 18:14:51 +0200 From: Ingo Molnar To: Willy Tarreau Cc: Nick Piggin , linux-kernel@vger.kernel.org, Linus Torvalds , Andrew Morton , Con Kolivas , Mike Galbraith , Arjan van de Ven , Thomas Gleixner Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS] Message-ID: <20070414161451.GC3099@elte.hu> References: <20070413202100.GA9957@elte.hu> <20070414020424.GB14544@wotan.suse.de> <20070414063254.GB14875@elte.hu> <20070414064334.GA19463@elte.hu> <20070414080833.GL943@1wt.eu> <20070414083625.GM943@1wt.eu> <20070414105338.GB19454@elte.hu> <20070414130101.GA2538@1wt.eu> <20070414132732.GA22103@1wt.eu> <20070414144544.GO943@1wt.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070414144544.GO943@1wt.eu> 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=3.1.7 -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 * Willy Tarreau wrote: > BTW, I've tried your fork patch. It definitely helps forking because > it takes below one second to create 4000 processes, then the load > slowly increases. As you said, the children have to earn their share, > and I find that it makes it easier to conserve control of the whole > system's stability. ok, thanks for testing this out, i think i'll integrate this one back into the core. (I'm still unsure about the cpu-hog one.) And it saves some code-size too: text data bss dec hex filename 23349 2705 24 26078 65de kernel/sched.o.cfs-v1 23189 2705 24 25918 653e kernel/sched.o.cfs-before 23052 2705 24 25781 64b5 kernel/sched.o.cfs-after 23366 4001 24 27391 6aff kernel/sched.o.vanilla 23671 4548 24 28243 6e53 kernel/sched.o.sd.v40 Ingo