Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262310AbVAUHtO (ORCPT ); Fri, 21 Jan 2005 02:49:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262311AbVAUHtO (ORCPT ); Fri, 21 Jan 2005 02:49:14 -0500 Received: from mx2.elte.hu ([157.181.151.9]:58512 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262310AbVAUHtJ (ORCPT ); Fri, 21 Jan 2005 02:49:09 -0500 Date: Fri, 21 Jan 2005 08:48:24 +0100 From: Ingo Molnar To: Con Kolivas Cc: ross@jose.lug.udel.edu, Paul Davis , "Jack O'Quin" , linux , rlrevell@joe-job.com, CK Kernel , utz , Andrew Morton , alexn@dsv.su.se, Rui Nuno Capela Subject: Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling Message-ID: <20050121074824.GA22626@elte.hu> References: <87pt00b01i.fsf@sulphur.joq.us> <200501201542.j0KFgOwo019109@localhost.localdomain> <20050120174939.GA15920@jose.lug.udel.edu> <41F03C03.3090209@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41F03C03.3090209@kolivas.org> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1222 Lines: 30 * Con Kolivas wrote: > In terms of recommendation, the latency of non-preemptible codepaths > will be fastest in ext3 in 2.6 due to the nature of it constantly > being examined, addressed and updated. That does not mean it has the > fastest performance by any stretch of the imagination. [...] i agree with the latency observation. But ext3 got two significant performance boosts recently, at two ends of the performance spectrum: - in the (lots-of-)small-files area: the addition of the htree feature - in the large-files-throughput case: with the addition of the reservation feature. ext3 installed by a recent distro should have both features enabled. (i know for sure that Fedora Core 3 with the update/erratum kernel installed will create ext3 filesystems that utilize both of these features by default.) I encourage everyone to try the famous 'create and read 1 million small files' test on both recent ext3 and on other filesystems. 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/