Tuning OpenCL Applications with the Periscope Tuning Framework

Tuning OpenCL Applications with the Periscope Tuning Framework

Abstract

Due to the complexity and diversity of new parallel architectures automatic tuning of parallel applications has become increasingly important for achieving acceptable performance levels as well as performance portability. The European AutoTune project developed a tuning framework which closely integrates and automates performance analysis and performance tuning. The Periscope Tuning Framework relies on a flexible plugin mechanism providing tuning plugins for different tuning aspects. This paper presents plugins for tuning the execution time of OpenCL kernels on three different architectures, namely standard multicore CPUs, Xeon Phi coprocessors, and GPUs. We present OpenCL tuning via the flags used during offline kernel compilation as well as through the selection of the most appropriate NDRange configuration, which defines the organization of parallel threads used for kernel execution. Both tuning plugins show significant performance impact and a clear dependence on the target architecture and thus improve performance portability via automatic tuning.

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Authors
  • Bajrovic, Enes
  • Mijakovic, Robert
  • Dokulil, Jiri
  • Benkner, Siegfried
  • Gerndt, Michael
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Shortfacts
Category
Paper in Conference Proceedings or in Workshop Proceedings
Event Title
49th Hawaii International Conference on System Sciences - HICSS 2016
Divisions
Scientific Computing
Event Location
Lihue, Kauai, USA
Event Type
Conference
Event Dates
Jan. 5-8, 2016
Date
January 2016
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