From owner-freebsd-hackers  Thu May 24 17:26:12 2001
Delivered-To: freebsd-hackers@freebsd.org
Received: from m44.spnet.com (m44.spnet.com [207.181.251.44])
	by hub.freebsd.org (Postfix) with ESMTP id 4BE1E37B43C
	for <hackers@freebsd.org>; Thu, 24 May 2001 17:26:05 -0700 (PDT)
	(envelope-from elh_fbsd@spnet.com)
Received: from spnet.com (localhost.spnet [127.0.0.1])
	by m44.spnet.com (8.11.3/8.11.3) with ESMTP id f4P0Pu905553;
	Thu, 24 May 2001 17:25:56 -0700 (PDT)
	(envelope-from elh_fbsd@spnet.com)
Message-Id: <200105250025.f4P0Pu905553@m44.spnet.com>
X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4
To: hackers@freebsd.org
Cc: elh_fbsd@spnet.com
Subject: Re: general speed differences between 4.1.1-RELEASE and 4.3-RELEASE 
In-Reply-To: Message from Mike Silbersack <silby@silby.com> 
   of "Thu, 24 May 2001 01:06:25 CDT." <20010524010153.L55558-100000@achilles.silby.com> 
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Thu, 24 May 2001 17:25:56 -0700
From: Ed Hudson <elh_fbsd@spnet.com>
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo?subject=subscribe%20freebsd-hackers>
List-Unsubscribe: <mailto:majordomo?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG

fyi, here's another hw.ata.wc=1 vs hw.ata.wc=0 comparison:


4.3-RELEASE install, ASUS A7V, 800mhz, hw.ata.wc=0, express install +all,
	60gig wd-600b udma100 drive, partitioned as:

		/	 8192m
		swap	 1024m
		/xtra	48023m

	installed from 52x cdrom.
	install time: 27minutes, 38 seconds (1658 seconds).

a modified 4.3-RELEASE install iso (modified by replacing /floppies/boot.flp
loader.rc/support.4th and adding a loader.conf, setting hw.ata.wc=1) file,
written to cd.

same partition, same install (express + all)

	install time:  8minutes, 59 seconds ( 539 seconds)

	4.3-with-wc=1 / 4.3-with-wc=0 :  3.07x

in both installation cases both filesystems were newfs'd, but the
speed difference is evident everywhere during the install.

i would urge the FreeBSD lords to consider mr. silbersack's proposal
of either remaking hw.ata.wc=1 the default, or at least, consider making
this the default for the base install.  perhaps something analagous
to the security settings (reliability settings) would be as reasonable
paradigm ?

thanks!

		-elh




To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message