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Date: Wed, 15 Oct 1997 09:58:58 -0600 (MDT)
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From: Nate Williams <nate@mt.sri.com>
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To: Mike Smith <mike@smith.net.au>
Cc: Adept <adept@cep.yale.edu>, Brian Somers <brian@awfulhak.org>,
        William Bulley <web@merit.edu>, freebsd-mobile@freebsd.org
Subject: Re: 3C589 performance (was Re: obtaining 3COM 3C589C PC-CARDs )
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	<199710151304.WAA00569@word.smith.net.au>
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[ Bad throughput on 3c589 cards ]

> On a silent network, their throughput is fine.  Unfortunately, it 
> appears that the '589 suffers from similar problems to other 3Com cards 
> on networks with other traffic; I see transfers out of this system as 
> slow as 50K/sec on a lightly to moderately loaded network.  Others have 
> reported similar experiences with other cards (3C509, 3C59x, 3C90x).

Hmm, I use our 3c589 on SRI-MP's *wiped out* network, and get the same
sorts of performances that the Sparc-20's get, which about 500-700K/sec.
Nothing spectacular, but the network is saturated with NFS traffic most
of the time, so collisions are a regular occurance.

(I have gotten speeds of 850K/sec on our lightly loaded SRI-MT network
though...)



Nate