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Date:      Mon, 03 May 1999 21:34:29 -0700
From:      David Greenman <dg@root.com>
To:        Wes Peters <wes@softweyr.com>
Cc:        sthaug@nethelp.no, hackers@FreeBSD.ORG
Subject:   Re: Decent network cards for 100Mbit? 
Message-ID:  <199905040434.VAA05874@implode.root.com>
In-Reply-To: Your message of "Mon, 03 May 1999 19:19:30 MDT." <372E4B22.4EC5B758@softweyr.com> 

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>> >I should probably point out I'm doing network throughput torture
>> >tests with 64-byte packets.  ;^)  Any reasonably good Fast Ethernet
>         ^^^^^^^^^^^^^^^^^^^^
>
>>    Your benchmark is broken. The pro/100, for one, can easily do 100Mbps
>> continuously. I should know since not only did I write the driver, but I
>
>The benchmark isn't broken, it's just weird.  No card can do 100Mbps with
>64-byte packets, the preamble lops off 1/3 of your performance using those
>itty bitty packets.  The PNIC came closer to the theoretical max than anything
>else.

   Sorry, I read your message too quickly. I retract my statement. :-) The
Intel card _should_ perform as well as anything. I don't think the code could
be written any more efficiently (I've tried, believe me), and the architecture
is very clean, so I guess I don't understand how another card could do better
unless there are some latencies or inter-frame gaps that the hardware is
creating.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org
Creator of high-performance Internet servers - http://www.terasolutions.com


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