Design of Digital's Parallel Software Environment

designed to support the development and execution of scalable parallel applications on clusters (farms) of distributedand shared-memory Alpha processors running the Digital UNIX operating system. PSE version 1.0 supports the High Performance Fortran (HPF) language; it also supplies generic facilities required by other parallel languages and systems. PSE provides tools to define a cluster of processors and to manage distributed parallel execution. It also contains development tools for debugging and profiling parallel HPF programs. PSE supports optimized message passing over multiple interconnect types, including fiber distributed data interface (FDDI), asynchronous transfer mode (ATM), and shared memory. In this paper, we present an overview of PSE version 1.0 and explain why it was designed and selected for use with HPF programs. We then discuss cluster definition and management, describe the PSE application model, and discuss PSE’s message-passing communication options, including an optimized transport for message passing. We conclude with our performance results.