jmpi:: A pure Java']Java implementation of MPI

In this paper, we present a portable, object-oriented, pure Java implementation of the Message-Passing Interface (MPI), called jmpi, jmpi is a class library of Java-routines for specifying and coordinating parallel codes. Our pure Java implementation is distinguished from earlier implementation efforts that pervasively use native methods and provide a Java wrapper functionality to some specific traditional MPI implementations. While bringing in a consistent MPI object model suitable for Java, we also follow the standard MPI Application Programming Interface (API) definitions as closely as possible to keep the learning curve short for experienced MPI programmers. We tested the performance of jmpi, by running a set of benchmark programs written in lava with calls to jmpi library routines on a cluster of SUN UltraSparc workstations.