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Foil 3 MPI Overview -- Comparison with HPF -- I

From CPS615-Initial Lecture on MPI ending with discussion of basic MPI_SEND Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 31 October 96. by Geoffrey C. Fox *
Secs 87.8
MPI collected ideas from many previous message passing systems and put them into a "standard" so we could write portable (runs on all current machines) and scalable (runs on future machines we can think of) parallel software
MPI agreed May 1994 after a process that began with a workshop in April 1992
MPI plays same role to message passing systems that HPF does to data parallel languages
BUT whereas MPI has essentially all one could want -- as message passing fully understood
HPF will still evolve as many unsolved data parallel compiler issues
  • e.g. HPC++ -- the C++ version version of HPF still uncertain
  • and there is no data parallel version of C due to pointers (C* has restrictions)
  • HPJava is our new idea
  • whereas MPI fine with Fortran C or C++ and even Java

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