From owner-freebsd-performance@FreeBSD.ORG  Fri Feb  4 02:52:56 2005
Return-Path: <owner-freebsd-performance@FreeBSD.ORG>
Delivered-To: freebsd-performance@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0F48016A4CE
	for <freebsd-performance@freebsd.org>;
	Fri,  4 Feb 2005 02:52:56 +0000 (GMT)
Received: from smtp102.rog.mail.re2.yahoo.com (smtp102.rog.mail.re2.yahoo.com
	[206.190.36.80])	by mx1.FreeBSD.org (Postfix) with SMTP id 5CF5E43D2F
	for <freebsd-performance@freebsd.org>;
	Fri,  4 Feb 2005 02:52:55 +0000 (GMT)
	(envelope-from mikej@rogers.com)
Received: from unknown (HELO 172.16.0.1) (mikej@69.193.222.195 with login)
  by smtp102.rog.mail.re2.yahoo.com with SMTP; 4 Feb 2005 02:52:54 -0000
Received: from 172.16.0.199
        (SquirrelMail authenticated user mikej);
        by 172.16.0.1 with HTTP;
        Thu, 3 Feb 2005 21:52:46 -0500 (EST)
Message-ID: <1170.172.16.0.199.1107485566.squirrel@172.16.0.199>
In-Reply-To: <dc9ba0440502031548544723a1@mail.gmail.com>
References: <dc9ba044050203143647cee0c2@mail.gmail.com> 
    <20050203175519.K18864@mail.chesapeake.net>
    <dc9ba0440502031548544723a1@mail.gmail.com>
Date: Thu, 3 Feb 2005 21:52:46 -0500 (EST)
From: "Mike Jakubik" <mikej@rogers.com>
To: "Nick Pavlica" <linicks@gmail.com>
User-Agent: SquirrelMail/1.4.3a
X-Mailer: SquirrelMail/1.4.3a
MIME-Version: 1.0
Content-Type: text/plain;charset=iso-8859-1
Content-Transfer-Encoding: 8bit
X-Priority: 3 (Normal)
Importance: Normal
cc: Jeff Roberson <jroberson@chesapeake.net>
cc: freebsd-performance@freebsd.org
Subject: Re: My disk I/O testing methods for FreeBSD 5.3 ...
X-BeenThere: freebsd-performance@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Performance/tuning <freebsd-performance.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-performance>
List-Post: <mailto:freebsd-performance@freebsd.org>
List-Help: <mailto:freebsd-performance-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Feb 2005 02:52:56 -0000

Nick Pavlica said:
> Jeff,
>   One of the tests where I saw a large difference was in DD.  I did a
> quick test on a server that was brought up to RELENG_5 via cvsup on
> 2/2/05.
>
> The Test:
> -bash-2.05b$ time dd bs=1024 if=/dev/zero of=tstfile count=1M
> 1048576+0 records in
> 1048576+0 records out
> 1073741824 bytes transferred in 74.402757 secs (14431479 bytes/sec)
>
> real    1m14.498s
> user    0m0.550s
> sys     0m8.838s

FYI.

# time dd bs=1024 if=/dev/zero of=tstfile count=1M
1048576+0 records in
1048576+0 records out
1073741824 bytes transferred in 22.150709 secs (48474377 bytes/sec)

real    0m22.173s
user    0m0.501s
sys     0m13.832s

This is on an old ATA disk.

FreeBSD 6.0-CURRENT #0: Wed Jan 19 21:11:16 EST 2005.

CPU: AMD Athlon(tm) Processor (1410.21-MHz 686-class CPU)
real memory  = 536788992 (511 MB)
acpi0: <ASUS A7V-133> on motherboard

ad0: 78167MB <Maxtor 6Y080P0/YAR41BW0> [158816/16/63] at ata0-master UDMA100