Automatic Loop Transformations and Parallelization for Java

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Automatic Loop Transformations and Parallelization for Java (2000)

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by Pedro V. Artigas , Manish Gupta , Samuel P. Midkiff , José E. Moreira

Venue:	In Proceedings of the 2000 International Conference on Supercomputing
Citations:	34 - 3 self

BibTeX

@INPROCEEDINGS{Artigas00automaticloop,
    author = {Pedro V. Artigas and Manish Gupta and Samuel P. Midkiff and José E. Moreira},
    title = {Automatic Loop Transformations and Parallelization for Java},
    booktitle = {In Proceedings of the 2000 International Conference on Supercomputing},
    year = {2000},
    pages = {1--10},
    publisher = {ACM Press}
}

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Abstract

From a software engineering perspective, the Java programming language provides an attractive platform for writing numerically intensive applications. A major drawback hampering its widespread adoption in this domain has been its poor performance on numerical codes. This paper describes a prototype Java compiler which demonstrates that it is possible to achieve performance levels approaching those of current state-of-the-art C, C++ and Fortran compilers on numerical codes. We describe a new transformation called alias versioning that takes advantage of the simplicity of pointers in Java. This transformation, combined with other techniques that we have developed, enables the compiler to perform high order loop transformations (for better data locality) and parallelization completely automatically. We believe that our compiler is the first to have such capabilities of optimizing numerical Java codes. We achieve, with Java, between 80 and 100% of the performance of highly optimized Fortra...

Keyphrases

automatic loop transformation numerical code current state-of-the-art high order loop transformation poor performance intensive application performance level new transformation data locality attractive platform java programming language software engineering perspective prototype java compiler major drawback fortran compiler numerical java code widespread adoption

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