A good place to start is with the Energy Sciences Network (ESNet) site https://fasterdata.es.net <https://fasterdata.es.net/> Lots of good data on optimizing ethernet networks; though, they tend to focus on long haul issues. Still well worth a look though
iperf3 is the latest version; ESnet has some recipes utilizing nuttcp; but, iperf3 can do those test now that older versions of iperf didn’t have the capability to do. George Wm Turner High Performance & Research Computing Architect turn...@iu.edu <mailto:turn...@iu.edu> > On Mar 17, 2017, at 10:33 AM, Lux, Jim (337C) <james.p....@jpl.nasa.gov> > 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@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf
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