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pmodels / oshmpi

OpenSHMEM Implementation on MPI
https://pmodels.github.io/oshmpi-www/
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coll: Get an MPI comm only if needed #126

Open rzambre opened 3 years ago

rzambre commented 3 years ago

Just noticed while reading the code that the scope of comm in broadcast is limited to the special path branch.

rzambre commented 3 years ago

A follow-up question: if PE_root is always w.r.t. to the active set, when will the generic path branch execute? In other words, in what scenario will the root not be part of the active set?