mpiJava: An Object-Oriented
Java interface to MPI

Mark Baker1, Bryan Carpenter2, Geoffrey Fox2,
Sung Hoon Ko2 and Sang Lim2

School of Computer Science
University of Portsmouth,
Southsea, Hants,
UK, PO4 8JF
Mark.Baker@port.ac.uk - NPAC at Syracuse University
Syracuse, New York,
NY 13244, USA
{dbc,gcf,shko,slim}@npac.syr.edu

January 8, 1999

Abstract:

A basic prerequisite for parallel programming is a good communication API. The recent interest in using Java for scientific and engineering application has led to several international efforts to produce a message passing interface to support parallel computation. In this paper we describe and then discuss the syntax, functionality and performance of one such interface, mpiJava, an object-oriented Java interface to MPI. We first discuss the design of the mpiJava API and the issues associated with its development. We then move on to briefly outline the steps necessary to 'port' mpiJava onto a range of operating systems, including Windows NT, Linux and Solaris. In the second part of the paper we present and then discuss some performance measurements made of communications bandwidth and latency to compare mpiJava on these systems. Finally, we summarise our experiences and then briefly mention work that we plan to undertake.