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Proceedings.International Conference on Parallel Architectures and Compilation Techniques (2002)
Charlottesville, Virginia
Sept. 22, 2002 to Sept. 25, 2002
ISSN: 1089-795X
ISBN: 0-7695-1620-3
pp: 7
Daniel Chavarría-Miranda , Rice University
John Mellor-Crummey , Rice University
Data parallel compilers have long aimed to equal the performance of carefully and-optimized parallel codes. For tightly-coupled applications based on line sweeps, this goal has been particularly elusive. In the Rice dHPF compiler, we have developed a wide spectrum of optimizations that enable us to closely approach hand-coded performance for tightly-coupled line sweep applications including the NAS SP and BT benchmark codes. From lightly-modified copies of standard serial versions of these benchmarks, dHPF generates MPI-based parallel code that is within 4% of the performance of the hand-crafted MPI implementations of these codes for a 102<sup>3</sup> problem size (Class B) on 64 processors.We describe and quantitatively evaluate the impact of partitioning, communication and memory hierarchy optimizations implemented by dHPF that enable us to approach hand-coded performance with compiler-generated parallel code.

D. Chavarría-Miranda and J. Mellor-Crummey, "An Evaluation of Data-Parallel Compiler Support for Line-Sweep Applications," Proceedings.International Conference on Parallel Architectures and Compilation Techniques(PACT), Charlottesville, Virginia, 2002, pp. 7.
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