Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261981AbUCBWbM (ORCPT ); Tue, 2 Mar 2004 17:31:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262126AbUCBWbM (ORCPT ); Tue, 2 Mar 2004 17:31:12 -0500 Received: from ppp-217-133-42-200.cust-adsl.tiscali.it ([217.133.42.200]:1284 "EHLO dualathlon.random") by vger.kernel.org with ESMTP id S261981AbUCBWbJ (ORCPT ); Tue, 2 Mar 2004 17:31:09 -0500 Date: Tue, 2 Mar 2004 23:31:48 +0100 From: Andrea Arcangeli To: Mike Fedyk Cc: albhaf , linux-kernel@vger.kernel.org Subject: Re: Better performance with 2.6 Message-ID: <20040302223148.GU2185@dualathlon.random> References: <1078229894.53b994c0albhaf@home.se> <4044D513.5090607@matchmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4044D513.5090607@matchmail.com> User-Agent: Mutt/1.4.1i X-GPG-Key: 1024D/68B9CB43 13D9 8355 295F 4823 7C49 C012 DFA1 686E 68B9 CB43 X-PGP-Key: 1024R/CB4660B9 CC A0 71 81 F4 A0 63 AC C0 4B 81 1D 8C 15 C8 E5 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 778 Lines: 18 On Tue, Mar 02, 2004 at 10:40:19AM -0800, Mike Fedyk wrote: > albhaf wrote: > >I know that 2.6 has the ability to get better > >performance than the other versions. > >But what parts of the kernel has provided to this > >performance upgrade? > > Preempt preempt hurts a bit performance (at least when running a single threaded app) with the object of helping interactivity, I say in theory because a 2.4-aa based kernel has a worst case RT scheduler latency lower than 2.6 with preempt enabled (during I/O and some other workload). - 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/