[Beowulf] ethernet performance testing

[Douglas Eadline]

If you go to ClusterMonkey.net and search for "netpipe"
you will get a bunch of stuff on Ethernet testing and
optimization -- the hardware may be a bit dated, but
the methods are still sound.

There are few tests I beat to death, netpipe is one
of them.

--
Doug




> This is a bit of a blast from the past question.. Back when Beowulfs were
> the “new hot thing”, we all used Ethernet as the interconnect
> There was a bunch of traffic on the list about measuring Ethernet
> performance using various utilities, and all the ways to optimize the
> performance (zero copy Ethernet drivers and the like, some interfaces just
> being slow, etc.).
>
> What’s the current strategy and tools for looking at the Ethernet stack
> and identify?  I have a colleague who is working with a software radio
> peripheral (USRP) that streams samples out, and he’s getting better
> performance with USB3 than with GigE - it may be that this is just the way
> it works USB is dedicated master/client, while GigE is peer to peer.   So
> I suggested he do some back to back testing using a pair of PCs to know
> what the limit is.
>
> And he turned it around and asked “so what tools can I use?”
>
> iperf?
> netcat?
>
> I’ll dig through the archives too..
>
>
> James Lux, P.E.
> Task Manager, DHFR Space Testbed
> Jet Propulsion Laboratory
> 4800 Oak Grove Drive, MS 161-213
> Pasadena CA 91109
> +1(818)354-2075
> +1(818)395-2714 (cell)
>
>
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-- 
Doug

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