Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756378AbYKUPWq (ORCPT ); Fri, 21 Nov 2008 10:22:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753955AbYKUPWf (ORCPT ); Fri, 21 Nov 2008 10:22:35 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:57312 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752452AbYKUPWd (ORCPT ); Fri, 21 Nov 2008 10:22:33 -0500 Date: Fri, 21 Nov 2008 16:21:48 +0100 From: Ingo Molnar To: Eric Dumazet Cc: David Miller , cl@linux-foundation.org, rjw@sisk.pl, linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org, efault@gmx.de, a.p.zijlstra@chello.nl, Linux Netdev List Subject: Re: [PATCH] fs: pipe/sockets/anon dentries should not have a parent Message-ID: <20081121152148.GA20388@elte.hu> References: <20081121083044.GL16242@elte.hu> <49267694.1030506@cosmosbay.com> <20081121.010508.40225532.davem@davemloft.net> <4926AEDB.10007@cosmosbay.com> <4926D022.5060008@cosmosbay.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4926D022.5060008@cosmosbay.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 Content-Length: 734 Lines: 34 * Eric Dumazet wrote: > Before patch, time to run 8 millions of close(socket()) calls on 8 > CPUS was : > > real 0m27.496s > user 0m0.657s > sys 3m39.092s > > After patch : > > real 0m23.997s > user 0m0.682s > sys 3m11.193s cool :-) What would it take to get it down to: >> Cost if run one one cpu : >> >> real 0m1.561s >> user 0m0.092s >> sys 0m1.469s i guess asking for a wall-clock cost of 1.561/8 would be too much? :) 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/