Zipcode is a message-passing and process-management system that was designed for multicomputers and homogeneous networks of computers in order to support libraries and large-scale multicomputer software. The system has evolved significantly over the last five years, based on our experiences and identified needs. Features of Zipcode that were originally unique to it, were its simultaneous support of static process groups, communication contexts, and virtual topologies, forming the "mailer" data structure. Point-to-point and collective operations reference the underlying group, and use contexts to avoid mixing up messages. Recently, we have added "gather-send" and "receive-scatter" semantics, based on persistent Zipcode "invoices," both as a means to simplify message passing, and as a means to reveal more potential runtime optimizations. Key features in Zipcode appear in the forthcoming MPI standard. Keywords: Static Process Groups, Contexts, Virtual Topologies, Point-to-Point Communica...

: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1 CHAPTER 1: SO WHAT'S THIS ALL ABOUT : : : : : : : : : : : : : : : : : : 2 CHAPTER 2: INTRODUCTION TO C* AND PC* : : : : : : : : : : : : : : : : : 8 2.1 Overview of C* : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 8 2.1.1 Shape and Parallel Execution : : : : : : : : : : : : : : : : : : : 8 2.1.2 Communication and Position Addressing : : : : : : : : : : : : : 10 2.1.3 Contextualization : : : : : : : : : : : : : : : : : : : : : : : : : 13 2.1.4 Summary : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 15 2.2 The pC* Implementation of C* : : : : : : : : : : : : : : : : : : : : : : 16 2.2.1 Genesis : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 16 2.2.2 Basic Implementation Model : : : : : : : : : : : : : : : : : : : 17 2.2.3 Current Status : : : : : : : : : : : : : : : : : : : : : : : : : : 19 2.3 Related Parallel and Data-Parallel Systems : : : : : : : : : : : : : : : : : 20 CHAP...

The increasing complexity of High Performance Computing (HPC) applications, especially scientific simulations, has led to the development of the meta-computation model of scientific applications. In this model, an application is constructed from a collection of independent software components potentially written in different programming languages and targeted for different machine architectures. A software interconnection system is then used to connect these heterogeneous components spanning the Internet into a single logical program, and to provide configuration and control capabilities over the resulting computation. This paper describes the meta-computation model, the current state of an interconnection system called Schooner that provides the software infrastructure needed to realize this model, and the use of the model in an on-going NASA jet engine simulation and monitoring project. 1. Introduction The simulation of scientific processes on high-performance computing (HPC) system...

This paper describes a simple approach to monitoring and controlling parallel computations executing on remote machines. This approach involves incorporating one or more parallel computations and a scientific visualization system such as AVS [2] into a single heterogeneous distributed program or