From owner-freebsd-hardware  Mon Jun  9 19:03:33 1997
Return-Path: <owner-hardware>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id TAA00111
          for hardware-outgoing; Mon, 9 Jun 1997 19:03:33 -0700 (PDT)
Received: from www2.shoppersnet.com (shoppersnet.com [204.156.152.112])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id TAA29999
          for <hardware@freebsd.org>; Mon, 9 Jun 1997 19:03:21 -0700 (PDT)
Received: (from hlew@localhost)
	by www2.shoppersnet.com (8.8.5/8.8.5) id TAA20786;
	Mon, 9 Jun 1997 19:12:07 -0700 (PDT)
Date: Mon, 9 Jun 1997 19:12:07 -0700 (PDT)
From: Howard Lew <hlew@www2.shoppersnet.com>
To: Craig Johnston <craig@gnofn.org>
cc: hardware@freebsd.org
Subject: Re: poor memory bandwidth on ABIT IT5H rev 1.5
In-Reply-To: <Pine.GSO.3.95.970606163225.26412A-100000@sparkie.gnofn.org>
Message-ID: <Pine.BSF.3.91.970609183922.16617A-100000@www2.shoppersnet.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-hardware@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

On Fri, 6 Jun 1997, Craig Johnston wrote:

> 
> Interesting --
> 
> 2.2.2 on the ABIT with an AMD K5-PR166 gives a result of 
> 60 megs/sec maximum via the naive memory bandwidth benchmark:
> dd if=/dev/zero of=/dev/null bs=1m count=100
> 
> while 2.2.2 on an Asus mobo (the HX one, t2p4? or something?)
> gives 86 meg/sec by the same benchmark.
> 
> The ABIT board has EDO dram @60ns, the Asus FPM @ 60ns.
> 
> Both kernels have 'flags 0x7' for npx0 -- as their slower (than intel)
> FPUs don't speed up memory moves.
> 
> I'd be extremely interested in seeing your results for 2.2.2 with 
> the K5 and the above flags on the ABIT and other motherboards.  
> 
> Anyone else have reason to believe the ABITs memory bandwidth
> sucks?  
> 

I thought the TX was better than the VX, so I compared several
motherboards with dd if=/dev/zero of=/dev/null bs=1m count=1000

CPU is AMD K5-PR133

FIC PT2006 (Intel VX) with 256K PB Cache & FreeBSD-2.1.7.1R
Got 65MB/s

FreeTech F63T (Intel VX) with 256K PB Cache & FreeBSD-2.1.7.1R
Got 62MB/s

FreeTech F79 (Intel TX) with 512K PB Cache & FreeBSD-3.0SNAP-6/6/97
Got 43MB/s

Is there something different about 3.0SNAP6/6/97?  Is there any option
parameter for the kernel config for the K5-PR133?  Unfortunately, 2
parameters changed, so I can't tell if it is the MB or the OS.  I decided 
to go with 3.0snap because of this missing TX PCI & IDE drivers.

All three tests were done with 32MB EDO memory (set to best memory
settings).