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Characterizing Task-Based OpenMP Programs

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  • Ananya Muddukrishna
  • Peter A Jonsson
  • Mats Brorsson

Abstract

Programmers struggle to understand performance of task-based OpenMP programs since profiling tools only report thread-based performance. Performance tuning also requires task-based performance in order to balance per-task memory hierarchy utilization against exposed task parallelism. We provide a cost-effective method to extract detailed task-based performance information from OpenMP programs. We demonstrate the utility of our method by quickly diagnosing performance problems and characterizing exposed task parallelism and per-task instruction profiles of benchmarks in the widely-used Barcelona OpenMP Tasks Suite. Programmers can tune performance faster and understand performance tradeoffs more effectively than existing tools by using our method to characterize task-based performance.

Suggested Citation

  • Ananya Muddukrishna & Peter A Jonsson & Mats Brorsson, 2015. "Characterizing Task-Based OpenMP Programs," PLOS ONE, Public Library of Science, vol. 10(4), pages 1-29, April.
    • Handle: RePEc:plo:pone00:0123545
    DOI: 10.1371/journal.pone.0123545
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