Have you switched versions of OMPI and this behavior surfaced with that?
Which version are you running and which version(s) do you know work?
What about system specs - multiple cores, processors?
I have experience with versions 1.2.5 and 1.2.8 running WRF with 4x DDR
Infiniband working without that behavior.
Philip Hayes wrote:
Hi,
I am running WRF simulations on multiple nodes and am running into
problems where the simulation will randomly slow down. The model
still works, but slows down tremendously. I looked at the each node
and found that 1 node will only be using 25% of the CPU, while the
others are using 100%. Is there a chance that this is related to
MPI? I can resubmit the same run on a different nodes and sometimes
it will work, and other times it slows down.
Is there any commands I can utilize that could point me to what is
causing the node only to use 25%?
Thanks
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