[Beowulf] ethernet performance testing

[Fred Youhanaie]

Brendan Gregg's web site is worth visiting:

	http://www.brendangregg.com/linuxperf.html

You may even be tempted to print out one or more of the diagrams and stick them on the wall ;-)

Cheers,
f.


On 17/03/17 14:33, Lux, Jim (337C) wrote:
> 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)
>
>
>
>
>
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
>