A Concurrent Object-Oriented Programming Language System for Highly Parallel Data-Driven Computers and its Applications

With recent developments of highly parallel computers, practical methods for developing programs on such machines become urgent. In this study, we regard our practical concurrent object-oriented programming language as a basic language for highly parallel machines and pursue necessary software approaches to achieving high performance by implementing the language system and developing application programs /parallel algorithms. As for the language system, we propose a language design suitable for parallel execution and implementation schemes that achieve high performance. Our implementation target is a fine-grained data-driven parallel computer, EM-4, developed at Electrotechnical Laboratories. We present and discuss the design of our runtime architecture and optimizing compiler, including reactive representations of objects, efficient management of message buffers with freelists, interruptible pipelined message sends, plan-do style intermediate code, an efficient implementation scheme f..