From owner-freebsd-scsi  Tue Jul 25 12:33:19 2000
Delivered-To: freebsd-scsi@freebsd.org
Received: from pawn.primelocation.net (pawn.primelocation.net [205.161.238.235])
	by hub.freebsd.org (Postfix) with ESMTP id 5CDBD37B864
	for <freebsd-scsi@freebsd.org>; Tue, 25 Jul 2000 12:33:15 -0700 (PDT)
	(envelope-from cdf.lists@fxp.org)
Received: by pawn.primelocation.net (Postfix, from userid 1016)
	id B40539B3F; Tue, 25 Jul 2000 15:33:11 -0400 (EDT)
Received: from localhost (localhost [127.0.0.1])
	by pawn.primelocation.net (Postfix) with ESMTP
	id A79ECBA11; Tue, 25 Jul 2000 15:33:11 -0400 (EDT)
Date: Tue, 25 Jul 2000 15:33:11 -0400 (EDT)
From: "Chris D. Faulhaber" <jedgar@fxp.org>
X-Sender: cdf.lists@pawn.primelocation.net
To: The Hermit Hacker <scrappy@hub.org>
Cc: freebsd-scsi@freebsd.org
Subject: Re: 4.1RC read/write speeds ...
In-Reply-To: <Pine.BSF.4.21.0007251600460.3502-100000@thelab.hub.org>
Message-ID: <Pine.BSF.4.21.0007251531380.23824-100000@pawn.primelocation.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-scsi@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

On Tue, 25 Jul 2000, The Hermit Hacker wrote:

> 
> Does this look right for a Dual-PIII, no load other then the operating
> system, idle disk *only* being used for the tests ... just seems low to
> me:
> 
> 
> Writing the 232 Megabyte file, 'iozone.tmp'...14.273438 seconds
> Reading the file...3.328125 seconds
> 
> IOZONE performance measurements:
>         17043521 bytes/second for writing the file
>         73095100 bytes/second for reading the file
> 
> ==============
> 
> full configuration fo that machine can be seen at
> http://atelier.acadiau.ca, but the basics are:
> 
> =========
> ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xa800-0xa8ff mem 0xe0000000-0xe0000fff irq 10 at device 11.0 on pci0
> ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
> ===========
> 
> da1 at ahc0 bus 0 target 1 lun 0
> da1: <WDIGTL WDE9180 ULTRA2 1.30> Fixed Direct Access SCSI-2 device 
> da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da1: 8727MB (17873040 512 byte sectors: 255H 63S/T 1112C)
> 
> 

You may want to try without the quirk entry.

From /sys/cam/cam_xpt.c:

{
                /*
                 * Slow when tagged queueing is enabled. (1.5MB/sec versus
                 * 8MB/sec.)
                 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
                 * Best performance with these drives is achieved with
                 * tagged queueing turned off, and write caching turned
on.
                 */
                { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
                /*quirks*/0, /*mintags*/0, /*maxtags*/0
        },

-----
Chris D. Faulhaber - jedgar@fxp.org - jedgar@FreeBSD.org
--------------------------------------------------------
FreeBSD: The Power To Serve   -   http://www.FreeBSD.org



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