I have a user whos code when ran on ethernet performs fine. When ran on verbs based IB the code deadlocks in an MPI_AllReduce() call.
We are using openmpi/1.4.3 with the intel compilers.
I poked at the running code with padb and I get the following:
0....5....1....5....2....5....3....5....4....5....
,,---,-,-,----,--,--,,-,RRRRRRRR,---,----,,--,-,-,
,,-,-,,,-,,--,-,,-,-,-,-RRRRRRRR-,-,---,,,--,,---,
,,---,-,,,,-,-,,-,-,----RRRRRRRR,----,-,--,,-----,
--,,-,-,,,,-,,------,,--RRRRRRRR,,----,,--,------,
For multiple runs which ranks are stuck in AllReduce() changes,
Is there any open bugs? I found one but only on shared memory and our version should be new enough (from what I could tell) to avoid it.
Thanks, what should I look for to diagnose the issue?
Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985
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