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

Mark Hahn hahn at mcmaster.ca
Mon Nov 16 16:58:25 EST 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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