What is the type signature of a distributed array?

In the type signature of a distributed array each slot holding a hyphen, -, stands for a distributed dimension, while an asterisk, *, stands for a sequential dimension.

What is the name of the group class in HPJava?

The Group class, representing an arbitrary HPJava process group, and closely analogous to an MPI group, has a special status in the HPJava language.

What is the current version of Adlib?

The new version of Adlib is implemented on top of a low-level API called mpjdev [21], designed with the goal that it can be implemented portably on network platforms and efficiently on parallel hardware.

Why is it a natural candidate to optimize the current HPJava compiler?

It is a natural candidate to optimize the current HPJava compiler because of the complexity of the terms in the subscript expression of a multiarray element access.

What is the purpose of the flow analysis?

It consists of two parts, DefAssign and DefUnassign, which checks the definite (un)assignment rules for Java, implementing the flow analysis of the Java language specification.

What is the main purpose of this paper?

The main purpose of this paper was to investigate whether their library-based HPspmd Programming Model can be efficiently adapted into programming support for high-performance grid-enabled applications.

What was the time-consuming part of the HPJava compiler?

Development of this type-checker was one of the most time-consuming parts during the implementation of the whole HPJava compiler.

What is the main goal of the GrADS project?

To achieve these goals, the GrADS project focuses on prototype forms of important scientific applications, together with programming systems and problem-solving environments to support the development of Grid applications by end users.

What is the purpose of this paper?

This paper begins with an interpretation of what “grid computing” means, why it is needed, and how their HPspmd programming model can be adapted to this end—shifting the focus from high-performance computing to high-performance grid-enabled environments.

Why is the HPspmd programming model so loosely coupled?

In part because the SPMD programming model is relatively loosely coupled (compared with HPF), and in part because of its foundation in a ubiquitous Internet programming language (Java), the authors can make the case that their HPspmd programming model provides promising programming support for high-performance grid-enabled environments.

Open AccessJournal Article10.1080/10637190410001725481

HP Java: Programming Support for High-Performance Grid-Enabled Applications

Hanku Lee, +3 more

- 01 Jun 2004

- Parallel Algorithms and Applications

- Vol. 19, pp 175-193

TL;DR: HP Java as mentioned in this paper is a grid computing environment for high-performance grid-enabled applications, including run-time communication library, compilation strategies and optimization schemes, which can be used not only for parallel computing, but also for gridenabled applications.

Abstract: The paper begins by considering what a grid computing environment might be, why it is demanded and how the authors' HP spmd programming fits into this picture. We then review our HP Java environment as a contribution towards programming support for high-performance grid-enabled environments. Future grid computing systems will need to provide programming models. In a proper programming model for grid-enabled environments and applications, high performance on multi-processor systems is a critical issue. We describe the features of HP Java, including run-time communication library, compilation strategies and optimization schemes. Through experiments, we compare HP Java programs against FORTRAN and ordinary Java programs. We aim to demonstrate that HP Java can be used “anywhere”—not only for high-performance parallel computing, but also for grid-enabled applications.

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Most frequently asked questions

1. What is the current version of the HPJava type-checker?

The current version of the HPJava type-checker (front-end) has three main phases; type-analysis, reachability analysis, and definite (un)assignment analysis.

2. How does it add remote objects to Java?

It adds remote objects to Java purely by declaration, avoiding disadvantages of explicit socket communication and the programming overhead of RMI.

3. What is the main idea of PRE?

PRE is a powerful and proper algorithm for HPJava compiler optimization, since loop invariants, which are naturally partially redundant, often occur in the subscript expression of distributed arrays.

4. What is the purpose of the HPJavaTypeChecker?

HPJavaTypeChecker does type-checking on statements, statement expressions, and expressions, including all ordinary Java, and the newly introduced HPJava constructs—multiarrays, etc.

Figure 6. Matrix multiplication on the Linux machine.

Figure 10. Three dimensional Diffusion equation with size o f 128 x 128 x 128 on IBM SP3.

Figure 9. Three dimensional Diffusion equation with size of 128 x 128 x 128 on SMP.

Figure 1. Matrix Multiplication in HPJava.

Citations

Journal Issue•10.1002/CPE.V20:10

An adaptive extension library for improving collective communication operations

O. Hartmann, +3 more

- 01 Jul 2008

- Concurrency and Computation: Practice an...

TL;DR: An adaptive extension library is presented that combines the advantage of using a portable MPI library with the ability to optimize the performance of specific collective communication operations in isolation as well as in the context of application programs.

...read moreread less

Journal Issue•10.1002/CPE.V20:18

A Grid-enabled problem-solving environment for advanced reservoir uncertainty analysis

Zhou Lei, +6 more

- 01 Dec 2008

- Concurrency and Computation: Practice an...

TL;DR: An integrated problem-solving environment ResGrid is designed and implemented to effectively improve reservoir uncertainty analysis and has been used in petroleum engineering.

...read moreread less

•Journal Article•10.1177/1094342007078449

Parallel Languages and Compilers: Perspective From the Titanium Experience

Katherine Yelick, +8 more

- 01 Aug 2007

TL;DR: This work addresses Titanium's partitioned global address space model, single program multiple data parallelism support, multi-dimensional arrays and array-index calculus, memory management, immutable classes, operator overloading, and generic programming.

...read moreread less

Proceedings Article•10.1109/CLUSTERW.2012.36

Towards an Adaptable Middleware for Parallel Computing in Heterogeneous Environments

Joao Saramago, +2 more

- 24 Sep 2012

TL;DR: This paper proposes an adaptable middleware for Java High-Performance Computing in heterogeneous clusters by trusting the runtime system with the management of thread and data placement, and equipping it with a layer able to adjust its implementation to the particularities of the underlying software and hardware stacks.

...read moreread less

•Proceedings Article•10.5555/1898699.1898726

Babylon v2.0: middleware for distributed, parallel, and mobile Java applications

W. van Heiningen, +2 more

- 25 Apr 2006

TL;DR: The most important programming features of the Babylon v2.0 system are described, using a heat diffusion example to show how they are used in practice and experimental results show that sequential Java applications can achieve significant performance benefits from using Babylon v 2.0 to parallelize their work across a cluster of workstations.

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References

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Compilers: Principles, Techniques, and Tools

Alfred V. Aho, +2 more

- 01 Jan 1986

TL;DR: This book discusses the design of a Code Generator, the role of the Lexical Analyzer, and other topics related to code generation and optimization.

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9.7K

•Journal Article•10.12694/SCPE.V3I3.192

The GRID: Blueprint for a New Computing Infrastructure

Ami Marowka

- 01 Jan 2000

- Scalable Computing: Practice and Experie...

TL;DR: The main purpose is to update the designers and users of parallel numerical algorithms with the latest research in the field and present the novel ideas, results and work in progress and advancing state-of-the-art techniques in the area of parallel and distributed computing for numerical and computational optimization problems in scientific and engineering application.

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The Java Language Specification

James Gosling, +2 more

- 12 Sep 1996

TL;DR: The Java Language Specification, Second Edition is the definitive technical reference for the Java programming language and provides complete, accurate, and detailed coverage of the syntax and semantics of the Java language.

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•Journal Article•10.1145/115372.115320

Efficiently computing static single assignment form and the control dependence graph

Ron Cytron, +4 more

- 01 Oct 1991

- ACM Transactions on Programming Language...

TL;DR: In this article, the authors present new algorithms that efficiently compute static single assignment forms and control dependence graphs for arbitrary control flow graphs using the concept of {\em dominance frontiers} and give analytical and experimental evidence that these data structures are usually linear in the size of the original program.

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Proceedings Article•10.1145/73560.73562

Global value numbers and redundant computations

Barry K. Rosen, +2 more

- 13 Jan 1988

TL;DR: This work proposes a redundancy elimination algorithm that is global (in that it deals with the entire program), yet able to recognize redundancy among expressions that are lexitally different, and takes advantage of second order effects.

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573

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HP Java: Programming Support for High-Performance Grid-Enabled Applications

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AI Agents for this Paper

Most frequently asked questions

1. What is the current version of the HPJava type-checker?

2. How does it add remote objects to Java?

3. What is the main idea of PRE?

4. What is the purpose of the HPJavaTypeChecker?

5. What is the type signature of a distributed array?

6. What is the name of the group class in HPJava?

7. What is the current version of Adlib?

8. Why is it a natural candidate to optimize the current HPJava compiler?

9. What is the purpose of the flow analysis?

10. What is the main purpose of this paper?

11. What was the time-consuming part of the HPJava compiler?

12. What is the main goal of the GrADS project?

13. What is the purpose of this paper?

14. Why is the HPspmd programming model so loosely coupled?

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Citations

An adaptive extension library for improving collective communication operations

A Grid-enabled problem-solving environment for advanced reservoir uncertainty analysis

Parallel Languages and Compilers: Perspective From the Titanium Experience

Towards an Adaptable Middleware for Parallel Computing in Heterogeneous Environments

Babylon v2.0: middleware for distributed, parallel, and mobile Java applications

References

Compilers: Principles, Techniques, and Tools

The GRID: Blueprint for a New Computing Infrastructure

The Java Language Specification

Efficiently computing static single assignment form and the control dependence graph

Global value numbers and redundant computations

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