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Design and Preliminary Evaluation of Omni OpenACC Compiler for Massive MIMD Processor PEZY-SC

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OpenMP: Memory, Devices, and Tasks (IWOMP 2016)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 9903))

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Abstract

PEZY-SC is a novel massive Multiple Instruction Multiple Data (MIMD) processor used as an accelerator and characterized by high power efficiency. OpenACC is a standard directive-based programming model for accelerators, and programmers can concisely offload data and computation to the accelerators. In this paper, we present the design and preliminary implementation of an OpenACC compiler for a PEZY-SC. Our compiler translates C code with OpenACC directives to the corresponding PZCL code, which is the programming environment for PEZY-SC. The evaluation shows that the performance of the OpenACC version achieves over 98 % at N-body and up to 88 % at NAS Parallel Benchmarks CG than that of the PZCL version. In addition, we examined optimization techniques such as kernel merging and explicit context switching to exploit the PEZY-SC MIMD architecture, which differs from the single instruction multiple data graphics processing units. We found these optimizations useful in improving the performance and will be implemented in the future release.

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Acknowledgment

The present study was supported in part by the JST/CREST program entitled “Research and Development on Unified Environment of Accelerated Computing and Interconnection for Post-Petascale Era” in the research area of “Development System Software Technologies for post-Peta Scale High Performance Computing”.

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Authors and Affiliations

  1. Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Japan

    Akihiro Tabuchi, Taisuke Boku & Mitsuhisa Sato

  2. ExaScaler Inc., Tokyo, Japan

    Yasuyuki Kimura & Sunao Torii

  3. Computing Research Center, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan

    Hideo Matsufuru & Tadashi Ishikawa

  4. Center for Computational Sciences, University of Tsukuba, Tsukuba, Japan

    Taisuke Boku

  5. RIKEN Advanced Institute for Computational Science, Kobe, Japan

    Mitsuhisa Sato

Authors
  1. Akihiro Tabuchi
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  2. Yasuyuki Kimura
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  3. Sunao Torii
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  4. Hideo Matsufuru
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  5. Tadashi Ishikawa
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  6. Taisuke Boku
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  7. Mitsuhisa Sato
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Corresponding author

Correspondence to Akihiro Tabuchi .

Editor information

Editors and Affiliations

  1. RIKEN AICS , Kobe, Japan

    Naoya Maruyama

  2. Lawrence Livermore National Laboratory , Livermore, California, USA

    Bronis R. de Supinski

  3. RIKEN AICS , Kobe, Japan

    Mohamed Wahib

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© 2016 Springer International Publishing Switzerland

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Tabuchi, A. et al. (2016). Design and Preliminary Evaluation of Omni OpenACC Compiler for Massive MIMD Processor PEZY-SC. In: Maruyama, N., de Supinski, B., Wahib, M. (eds) OpenMP: Memory, Devices, and Tasks. IWOMP 2016. Lecture Notes in Computer Science(), vol 9903. Springer, Cham. https://doi.org/10.1007/978-3-319-45550-1_21

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  • DOI: https://doi.org/10.1007/978-3-319-45550-1_21

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-45549-5

  • Online ISBN: 978-3-319-45550-1

  • eBook Packages: Computer ScienceComputer Science (R0)

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