Extending high performance Fortran for the support of unstructured computations
Andreas Müller, Roland Rühl · 1995
We have extended an existing HPF compiler with language features designed for the parallelization of unstructured computations on multicomputers.The language extensions include block-general distributions and dynamic data distributions specified through userdefined mapping arrays and finctions.A prototype compiler has been implemented which features dlfherent run-time preprocessing mechanisms and also allows clean integration of explicit messagepassing primitives.The compiler is developed as part of a complete multicomputer programming environment being used by a group of application developers in the framework of the Joint CSCS-ETH/NEC Collaboration in Parallel Processing.As such, it is supported by a high-level debugger andpe~oimance monitoc and the usability and efficiency of generated parallel programs is validated by the application developers.In this pape~we summarize the programming paradigm implemented through HPF extensions, and detail the respective compiler directives.We describe the implemented run-time preprocessing mechanisms and evaluate the efjlciency of compiler-generated code on an NEC Cenju-3 multicomputez