Data Parallel HPJava: Motivation

• Data parallelism important in High Performance scientific computing.

• Java must use same ideas as HPF HPC++ but details of language and experience can suggest a different implementation

• High level HPF programming model attractive, but implementations problematic and base language is Fortran!

• HPspmd model: Distributed array syntax, plus high-level class library bindings for communication and arithmetic on arrays.

  • Can be applied to Fortran C++ Java
  • Explicitly MIMD control flow.
  • Ease of HPF Arrays; power of MPI; HPJava uses best language ….

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