On Aug 11, 2010, at 9:54 AM, Jeff Squyres wrote:
> (I'll say that OMPI's ALLGATHER algorithm is probably not well optimized for massive data transfers like you describe)
Wrong wrong wrong -- I should have checked the code before sending. I made the incorrect assumption that OMPI still only had a trivial gather implementation. It does not; there are several different algorithms that may be used for ALLGATHER (as determined on the fly at run time, blah, blah, blah).
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