Exploiting locality in the run-time parallelization of irregular loops | IEEE Conference Publication | IEEE Xplore

Exploiting locality in the run-time parallelization of irregular loops


Abstract:

The goal of this work is the efficient parallel execution of loops with indirect array accesses, in order to be embedded in a parallelizing compiler framework. In this ki...Show More

Abstract:

The goal of this work is the efficient parallel execution of loops with indirect array accesses, in order to be embedded in a parallelizing compiler framework. In this kind of loop pattern, dependences can not always be determined at compile-time as, in many cases, they involve input data that are only known at run-time and/or the access pattern is too complex to be analyzed In this paper we propose runtime strategies for the parallelization of these loops. Our approaches focus not only on extracting parallelism among iterations of the loop, but also on exploiting data access locality to improve memory hierarchy behavior and, thus, the overall program speedup. Two strategies are proposed one based on graph partitioning techniques and other based on a block-cyclic distribution. Experimental results show that both strategies are complementary and the choice of the best alternative depends on some features of the loop pattern.
Date of Conference: 21-21 August 2002
Date Added to IEEE Xplore: 10 December 2002
Print ISBN:0-7695-1677-7
Print ISSN: 0190-3918
Conference Location: Vancouver, BC, Canada

References

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