On Mar 3, 2015, at 5:42 PM, Jeff Squyres (jsquyres) <[email protected]> wrote:

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My understanding is that "implementation that do not support threads" are not referring to implementations that solely provide support for MPI_THREAD_SERIALIZED,

Where is that defined? This is a question that came out of the forum: "What exactly does it mean to 'not support threads'? Every process has at least one thread."

Lines 13-14: MPI may be implemented in environ- ments where threads are not supported or perform poorly. -- Pavan Balaji ✉️ http://www.mcs.anl.gov/~balaji