[Beowulf] MPI_Isend/Irecv failure for IB and large message sizes

Mark Hahn hahn at mcmaster.ca
Mon Nov 16 13:58:25 PST 2009

>>> I am running into problems when sending large messages (about
>>> 180000000 doubles) over IB. A fairly trivial example program is attached.
>> sorry if you've already thought of this, but might you have RLIMIT_MEMLOCK
>> set too low?  (ulimit -l)
> Good point.
> max locked memory       (kbytes, -l) unlimited
> ... same error :-(

well, at this point, I'd consider running the test program under strace.

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