From owner-freebsd-hackers@FreeBSD.ORG  Sat Nov 12 16:14:28 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0ADDB16A41F
	for <freebsd-hackers@freebsd.org>; Sat, 12 Nov 2005 16:14:28 +0000 (GMT)
	(envelope-from fullermd@over-yonder.net)
Received: from mail.localelinks.com (web.localelinks.com [65.170.254.5])
	by mx1.FreeBSD.org (Postfix) with ESMTP id A7FF343D45
	for <freebsd-hackers@freebsd.org>; Sat, 12 Nov 2005 16:14:27 +0000 (GMT)
	(envelope-from fullermd@over-yonder.net)
Received: from mortis.over-yonder.net (adsl-144-205-108.jan.bellsouth.net
	[70.144.205.108])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mail.localelinks.com (Postfix) with ESMTP id AD0D02A
	for <freebsd-hackers@freebsd.org>; Sat, 12 Nov 2005 10:14:24 -0600 (CST)
Received: by mortis.over-yonder.net (Postfix, from userid 100)
	id 3765120FC9; Sat, 12 Nov 2005 10:14:23 -0600 (CST)
Date: Sat, 12 Nov 2005 10:14:22 -0600
From: "Matthew D. Fuller" <fullermd@over-yonder.net>
To: Pyun YongHyeon <pyunyh@gmail.com>
Message-ID: <20051112161422.GB1485@over-yonder.net>
References: <20051112071815.GD18405@rndsoft.co.kr>
	<20051112073711.GE39882@cirb503493.alcatel.com.au>
	<20051112074418.GE18405@rndsoft.co.kr>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20051112074418.GE18405@rndsoft.co.kr>
X-Editor: vi
X-OS: FreeBSD <http://www.freebsd.org/>
User-Agent: Mutt/1.5.9i-fullermd.2
Cc: Peter Jeremy <PeterJeremy@optushome.com.au>, freebsd-hackers@freebsd.org
Subject: Re: poor fdc(4) performance
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 12 Nov 2005 16:14:28 -0000

On Sat, Nov 12, 2005 at 04:44:18PM +0900 I heard the voice of
Pyun YongHyeon, and lo! it spake thus:
> 
> Yes, it could be. But I think the machine is fast enough to read
> sequential blocks.

Try running it without SMP.  There may be enough happening in the MP
locking bit that you end up falling behind.  I remember noticing crap
fdc performance (without larger block sizes) on my dual PPro a little
while back.


-- 
Matthew Fuller     (MF4839)   |  fullermd@over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.