From owner-freebsd-current@FreeBSD.ORG Fri Jan 26 05:56:36 2007 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6146016A402 for ; Fri, 26 Jan 2007 05:56:36 +0000 (UTC) (envelope-from cperciva@freebsd.org) Received: from pd4mo1so.prod.shaw.ca (shawidc-mo1.cg.shawcable.net [24.71.223.10]) by mx1.freebsd.org (Postfix) with ESMTP id 4051813C48A for ; Fri, 26 Jan 2007 05:56:36 +0000 (UTC) (envelope-from cperciva@freebsd.org) Received: from pd2mr5so.prod.shaw.ca (pd2mr5so-qfe3.prod.shaw.ca [10.0.141.8]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with ESMTP id <0JCG00GW4LM5MF80@l-daemon> for current@freebsd.org; Thu, 25 Jan 2007 21:54:05 -0700 (MST) Received: from pn2ml5so.prod.shaw.ca ([10.0.121.149]) by pd2mr5so.prod.shaw.ca (Sun Java System Messaging Server 6.2-2.05 (built Apr 28 2005)) with ESMTP id <0JCG004CWLM5DAA2@pd2mr5so.prod.shaw.ca> for current@freebsd.org; Thu, 25 Jan 2007 21:54:05 -0700 (MST) Received: from hexahedron.daemonology.net ([24.82.18.31]) by l-daemon (Sun ONE Messaging Server 6.0 HotFix 1.01 (built Mar 15 2004)) with SMTP id <0JCG00DAGLLY3JF2@l-daemon> for current@freebsd.org; Thu, 25 Jan 2007 21:53:59 -0700 (MST) Received: (qmail 5065 invoked from network); Fri, 26 Jan 2007 04:53:48 +0000 Received: from unknown (HELO ?127.0.0.1?) (127.0.0.1) by localhost with SMTP; Fri, 26 Jan 2007 04:53:48 +0000 Date: Thu, 25 Jan 2007 20:53:47 -0800 From: Colin Percival In-reply-to: <20070125.192448.-432840241.imp@bsdimp.com> To: "M. Warner Losh" Message-id: <45B9895B.9020709@freebsd.org> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7bit X-Enigmail-Version: 0.94.0.0 References: <20070125.192448.-432840241.imp@bsdimp.com> User-Agent: Thunderbird 1.5.0.9 (X11/20061227) Cc: current@freebsd.org Subject: Re: Interesting speed benchmarks X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jan 2007 05:56:36 -0000 M. Warner Losh wrote: > On a lark, I just got a combo USB/Firewire external disk drive. I ran > some crude benchmarks, and I was surprised by what I found. This is > on a fairly stock -current kernel. > > Firewire does around 40MB/s, while USB 2.0 maxes out at about 12MB/s. Either amd64 is slower than i386, there has been a performance regression between 6.2-RELEASE and whatever version of FreeBSD you're running, or you have a rather slow external drive. I get 25MB/s from my Vantec Nexstar3 USB 2.0 enclosure: http://www.daemonology.net/blog/2006-01-28-vantex-nexstar3.html Colin Percival