Bill Gropp Presents: MPI and Hybrid Programming Models

Bill Gropp presented this talk at the Argonne Training Program on Extreme-Scale Computing. "Where it is used as an alternative to MPI, OpenMP often has difficulty achieving the performance of MPI (MPI's much-criticized requirement that the user directly manage data motion ensures that the programmer does in fact manage that memory motion, leading to improved performance). This suggests that other programming models can be productively combined with MPI as long as they complement, rather than replace, MPI."

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