Open MPI figures out that peers are homogeneous automatically;
there's no need for a LAM-like -O option to mpirun.
FWIW: recent versions of LAM (7.1 and beyond? I don't remember when
the feature was introduced offhand) automatically figure out when
you're in a homogeneous environment and skip all the byte-swapping
stuff. Using the -O option doesn't hurt, but it shouldn't be necessary.
On Aug 7, 2007, at 5:47 AM, Geoffroy PIGNOT wrote:
> Does openmpi mpirun command have the equivalent option "-O" as lam
> (homogeneous universe)
> I would like avoid automatic byteswap in heterogeneous execution
> Thanks in advance
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