Optimizing irregular HPF applications using halos

摘要

This paper presents extensions of High Performance Fortran (HPF) for specifying non-local access patterns of distributed arrays, called halos, and for controlling communication associated with these non-local accesses. Using these features, crucial optimization techniques required for an efficient parallelization of irregular applications may be applied. The information provided by halos s utilized by the compiler and the runtime system for optimizing the management of distributed arrays and the computation of communication schedules.