JGI

Compile-time program optimizations are similar to poetry: more are written than are actually published in commercial compilers. Hard economic reality is that many interesting optimizations have too narrow an audience to justify their cost in a general-...

CCJ is a communication library that adds MPI-like collective operations to Java. Rather than trying to adhere to the precise MPI syntax, CCJ aims at a clean integration of collective communication into Java's object-oriented framework. For example, CCJ ...

We present efficient support for generalized arrays of parallel data driven objects. The “array elements” are scattered across a parallel machine. Each array element is an object that can be thought of as a virtual processor. The individual elements are ...

Java has integrated multithreading to a far greater extent than most programming languages. It is also one of the only languages that specifies and requires safety guarantees for improperly synchronized programs. It turns out that understanding these ...

The Java platform has many characteristics that make it very desirable for integrated continuous media processing. Unfortunately, it lacks the necessary CPU resource management facility to support quality of service guarantees for soft real-time ...

Many concurrent garbage collection (GC) algorithms have been devised, but few have been implemented and evaluated, particularly for the Java programming language. Sapphire is an algorithm we have devised for concurrent copying GC. Sapphire stresses ...

In this paper we present a set of language extensions that improve the expressiveness and performance of Java for scientific computation. First of all, the language extensions allow the manipulation of multi-dimensional arrays to be expressed more ...

Object-oriented programming languages have always distinguished between “primitive” and “user-defined” data types, and in the case of languages like C++ and Java, the primitives are not even treated as objects, further fragmenting the programming model. ...

CX, a network-based computational exchange, is presented. The system's design integrates variations of ideas from other researchers, such as work stealing, non-blocking tasks, eager scheduling, and space-based coordination. The object-oriented API is ...

Parallel Java environments present challenging problems for performance tools because of Java's rich language system and its multi-level execution platform combined with the integration of native-code application libraries and parallel runtime software. ...

Increasing interest is being shown in the use of Java for scientific applications. The Java Grande benchmark suite [4] was designed with such applications primarily in mind. The perceived lack of performance of Java still deters many potential users, ...

In this paper we present a platform independent analysis of the dynamic profiles of Java programs when executing on the Java Virtual Machine. The Java programs selected are taken from the Java Grande Forum benchmark suite, and five different Java-to-...

The lack of direct support for multidimensional arrays in Java™ has been recognized as a major deficiency in the language's applicability to numerical computing. The typical approach to adding multidimensional arrays to Java has been through class ...

This paper reports on the design of a FORTRAN-to-Java translator whose target language is the instruction set of the Java Virtual Machine. The goal of the translator is to generate Java implementations of legacy FORTRAN numerical codes in a consistent ...

This paper describes a component-based non-linear physical system simulation prototyping package written entirely in Java using object-oriented design to provide scientists and engineers a “developer-friendly” software environment for large-scale ...

The computational science community is reluctant to write large-scale computationally-intensive applications in Java due to concerns over Java's poor performance, despite the claimed software engineering advantages of its object-oriented features. Naive ...

Jackal is a fine-grained distributed shared memory implementation of the Java programming language. Jackal implements Java's memory model and allows multithreaded Java programs to run unmodified on distributed-memory systems.

This paper focuses on Jackal'...

Rapid commoditization of advanced hardware and progress of networking technology is now making wide area high-performance computing a.k.a. the 'Grid' Computing a reality. Since a Grid will consist of vastly heterogeneous sets of compute nodes, ...

Distributed computing has become increasingly popular in the high performance community. Java's Remote Method Invocation (RMI) provides a simple, yet powerful method for implementing parallel algorithms. The performance of RMI has been less than ...

The multi-agent research community is currently faced with a paradox. While promoting the use of agents as the silver bullet for various software engineering problems, it faces difficulties in presenting successful deployments. Despite the countless ...

In the six years since Java was offered to the developer community, it has proven to be an extraordinary product of recent achievements in computer science. But Java has the reputation, especially among non-java users, to be slow and non-well suited for ...