From owner-freebsd-arch@FreeBSD.ORG Mon Nov 22 14:17:47 2004 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 440C016A5A3 for ; Mon, 22 Nov 2004 14:17:47 +0000 (GMT) Received: from xorpc.icir.org (xorpc.icir.org [192.150.187.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0B22A43D49 for ; Mon, 22 Nov 2004 14:17:47 +0000 (GMT) (envelope-from rizzo@icir.org) Received: from xorpc.icir.org (localhost [127.0.0.1]) by xorpc.icir.org (8.12.11/8.12.8) with ESMTP id iAMEHg0b072935; Mon, 22 Nov 2004 06:17:42 -0800 (PST) (envelope-from rizzo@xorpc.icir.org) Received: (from rizzo@localhost) by xorpc.icir.org (8.12.11/8.12.3/Submit) id iAMEHgD8072934; Mon, 22 Nov 2004 06:17:42 -0800 (PST) (envelope-from rizzo) Date: Mon, 22 Nov 2004 06:17:42 -0800 From: Luigi Rizzo To: =?iso-8859-1?Q?Dag-Erling_Sm=F8rgrav?= Message-ID: <20041122061742.A72907@xorpc.icir.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.2.5.1i In-Reply-To: ; from des@des.no on Mon, Nov 22, 2004 at 03:12:51PM +0100 cc: arch@freebsd.org Subject: Re: anticipatory I/O scheduling X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Nov 2004 14:17:47 -0000 On Mon, Nov 22, 2004 at 03:12:51PM +0100, Dag-Erling Smørgrav wrote: > I just ran across this paper and started wondering why I'd never heard > of it before: > > > > To summarize, the authors rewrote the I/O scheduling algorithm in > FreeBSD 4.3 and got massive performance improvements for Apache, and > smaller but noticeable improvements for AFS and TPC-B. > > Has anyone looked into this? yes.... but what exactly do you want to know :) cheers luigi