On 29/03/16 15:10, Michael Di Domenico wrote:
On Tue, Mar 29, 2016 at 9:01 AM, Olli-Pekka Lehto
<olli-pekka.le...@csc.fi> wrote:
- Simple MPI latency / bandwidth test called mpisweep that tests every
link (I'll put this up on github later as well)
Any reference to mpisweep yet?
Google didn't give me much...
That's an internal code I whipped up at some point. Pretty much the minimum
viable program to do a sweep of all the connections. I'll try to clean it up a
bit and put it up in the next few days.
I put it now up on github. Very simple and short :)
https://github.com/CSC-IT-Center-for-Science/mpisweep
as a programming exercise it would be handy to extend this to doing
around the world ping tests. where by i mean 1 xfers to all, 2 xfers
to all, 3 xfers to all
i recently found a misbehaving IB card inside a multi-card switch
using this approach. it was a very odd result where by only certain
pairings of hosts in certain directions were failing with slow latency
and bandwidth
Maybe take a look at https://github.com/hpcugent/mympingpong (it has
pretty pictures in the README).
K.
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