From owner-freebsd-stable@FreeBSD.ORG Wed May 17 06:32:25 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5DEED16A402 for ; Wed, 17 May 2006 06:32:25 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from linda-3.paradise.net.nz (bm-3a.paradise.net.nz [203.96.152.182]) by mx1.FreeBSD.org (Postfix) with ESMTP id BC20443D5C for ; Wed, 17 May 2006 06:32:24 +0000 (GMT) (envelope-from markir@paradise.net.nz) Received: from smtp-3.paradise.net.nz (tclsnelb1-src-1.paradise.net.nz [203.96.152.172]) by linda-3.paradise.net.nz (Paradise.net.nz) with ESMTP id <0IZE00C9HCTYNV@linda-3.paradise.net.nz> for freebsd-stable@freebsd.org; Wed, 17 May 2006 18:32:22 +1200 (NZST) Received: from [192.168.1.11] (218-101-29-197.dsl.clear.net.nz [218.101.29.197]) by smtp-3.paradise.net.nz (Postfix) with ESMTP id AC2BB158B8E0 for ; Wed, 17 May 2006 18:31:58 +1200 (NZST) Date: Wed, 17 May 2006 18:31:56 +1200 From: Mark Kirkwood To: freebsd-stable@freebsd.org Message-id: <446AC35C.2090304@paradise.net.nz> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Thunderbird 1.5 (X11/20060417) Subject: Sequantial IO Performance improvement in 6.1-STABLE X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 May 2006 06:32:25 -0000 I recently upgraded my FreeBSD machines from 6.0R to 6.1-STABLE I noticed a pleasant surprise - improved disk IO! In 6.0R best sequential throughput I ever saw was 170 MB/s (32k block size reads on an 4G file). In 6.1-STABLE I'm seeing 190 Mb/s (32k block size reads on an 4G file). The machine in question is a Supermico P3TDER with 2G RAM, a 3Ware 7506 and 4 Maxtor 6Y080P0 RAID0. So anyway - very nice. Best wishes Mark