From owner-freebsd-hackers  Mon Jul 19 10:16:27 1999
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	id 0254914CB1; Mon, 19 Jul 1999 10:16:25 -0700 (PDT)
From: "Jonathan M. Bresler" <jmb@hub.freebsd.org>
To: rbezuide@oskar.nanoteq.co.za
Cc: vince@venus.GAIANET.NET, sthaug@nethelp.no,
	tim@storm.digital-rain.com, freebsd-hackers@FreeBSD.ORG
In-reply-to: <199907190816.KAA22986@oskar.nanoteq.co.za> (message from Reinier
	Bezuidenhout on Mon, 19 Jul 1999 10:16:47 +0200 (SAT))
Subject: Re: poor ethernet performance?
Message-Id: <19990719171625.0254914CB1@hub.freebsd.org>
Date: Mon, 19 Jul 1999 10:16:25 -0700 (PDT)
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> We have previously done many network performance tests for our 
> products running on FreeBSD ... 
> 
> We have found that when ever there is disk accessing involved, it
> is not a good idea to look at the transfer figures.  We did tests
> with ftp and is was slow (compared to only memory generated data 
> e.g. ttcp)
> 
> 1. If you want to test the network speed ... use ttcp or something
>    that generates the data and doesn't read it from disk.
> 

	absolutely right.

	netperf generates its own data on the fly.  it does not
generate any disk activity.


> 2. When doing full-duplex and using fxp cards, stay away from X-over
>    cables ... use a full-duplex switch etc. ... the fxp cards are not
>    made to work with X-over cables (as far as I know - ala Intel spec)
>    note ... only for full-duplex tests.

	hmm....i have used intel cards on a cross-over cable regularly
without any problems whatsoever.

jmb


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