From owner-freebsd-stable@FreeBSD.ORG Thu Dec 21 11:34:10 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5D0B116A586 for ; Thu, 21 Dec 2006 11:34:10 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from smtp4.clear.net.nz (smtp4.clear.net.nz [203.97.37.64]) by mx1.freebsd.org (Postfix) with ESMTP id 2008413C483 for ; Thu, 21 Dec 2006 11:34:10 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from [192.168.1.11] (121-72-65-158.dsl.telstraclear.net [121.72.65.158]) by smtp4.clear.net.nz (CLEAR Net Mail) with ESMTP id <0JAM00A5PBYODK20@smtp4.clear.net.nz> for freebsd-stable@freebsd.org; Thu, 21 Dec 2006 23:04:00 +1300 (NZDT) Date: Thu, 21 Dec 2006 23:03:48 +1300 From: Mark Kirkwood In-reply-to: <200612210631.31088.joao@matik.com.br> To: JoaoBR Message-id: <458A5C04.9060109@paradise.net.nz> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: <45888C68.10305@paradise.net.nz> <200612200816.51043.joao@matik.com.br> <4589128F.9030404@paradise.net.nz> <200612210631.31088.joao@matik.com.br> User-Agent: Thunderbird 1.5.0.8 (X11/20061129) Cc: "O. Hartmann" , freebsd-stable@freebsd.org Subject: Re: Cached file read performance with 6.2-PRERELEASE 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: Thu, 21 Dec 2006 11:34:10 -0000 JoaoBR wrote: > > I am not convinced that this kind of test is of any value for comparing > systems at all because there are too much factors involved - unless the > competitors are installed on identical hardware. On the other side I think it > is usefull to compare tweaked settings on a particular machine. For example > you may change fsize/bsize of the filesystem or any other and can compare > this results then. > Exactly, that's why I did the comparison - I think you missed the part where I mentioned the 2 systems were *identical* with respect to cpus, memory, mobo - in fact even the power supplies are identical too! the only differences are that the Gentoo system has a different RAID controller from the FreeBSD one (a cheaper one in fact), and the FreeBSD system has larger capacity disks (slightly newer variants, same brand!) given this comparison is about *cached* read rates, the RAID controllers and disks are not significant I think. Specifically: Gentoo : - Supermicro P3TDER - 2xSL5QL 1.26 GHz PIII - 2xKingston PC133 RCC Registered 1GB DIMMS - Promise TX4000 4x Maxtor plus 8 ATA-133 7200 40G FreeBSD - Supermicro P3TDER - 2xSL5QL 1.26 GHz PIII - 2xKingston PC133 RCC Registered 1GB DIMM - 3Ware 7506 4x Maxtor Plus 9 ATA-133 7200 80G In fact, to indulge your skepticism ('cause I think this is a real issue worth sorting out), I booted the FreeBSD system with a Gentoo livecd and ran the same tests there... and guess what - identical results to the installed Gentoo system...so... errm - *my* experimental method is sound...so how about we just get together and see how to make FreeBSD kick Gentoo eh? Cheers Mark