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International Conference on Parallel Processing and Applied Mathematics

PPAM 2019: Parallel Processing and Applied Mathematics pp 237–249Cite as

OpenMP Target Device Offloading for the SX-Aurora TSUBASA Vector Engine

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 12043))

Abstract

Driven by the heterogeneity trend in modern supercomputers, OpenMP provides support for heterogeneous systems since 2013. Having a single programming model for all kinds of accelerator-based systems decreases the burden of code porting to different device types. The acceptance of this heterogeneous paradigm requires the availability of corresponding OpenMP compiler and runtime environments supporting different target device architectures. The LLVM/Clang infrastructure is designated to extend the offloading features for any new target platform. However, this supposes a compatible compiler backend for the target architecture. In order to overcome this limitation we present a source-to-source code transformation technique which outlines the OpenMP code regions for the target device. By combining this technique with a corresponding communication layer, we enable OpenMP target offloading to the NEC SX-Aurora TSUBASA vector engine, which represents the new generation of vector computing.

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Notes

  1. 1.

    https://github.com/veos-sxarr-NEC/veoffload.

  2. 2.

    https://github.com/RWTH-HPC.

  3. 3.

    https://rwth-hpc.github.io/sx-aurora-offloading.

  4. 4.

    https://github.com/clang-omp/OffloadingDesign.

  5. 5.

    Clang allows to define x86 as target device for testing purpose, where the target regions are executed on the host, but using the corresponding plugin in libomptarget.

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Authors and Affiliations

  1. IT Center, RWTH Aachen University, Aachen, Germany

    Tim Cramer, Manoel Römmer, Boris Kosmynin & Matthias S. Müller

  2. NEC Cooperation, Stuttgart, Germany

    Erich Focht

Authors
  1. Tim Cramer
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  2. Manoel Römmer
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  3. Boris Kosmynin
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  4. Erich Focht
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  5. Matthias S. Müller
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Corresponding author

Correspondence to Tim Cramer .

Editor information

Editors and Affiliations

  1. Czestochowa University of Technology, Czestochowa, Poland

    Roman Wyrzykowski

  2. University of Southern California, Marina del Rey, CA, USA

    Ewa Deelman

  3. University of Tennessee, Knoxville, TN, USA

    Jack Dongarra

  4. Czestochowa University of Technology, Czestochowa, Poland

    Konrad Karczewski

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Cramer, T., Römmer, M., Kosmynin, B., Focht, E., Müller, M.S. (2020). OpenMP Target Device Offloading for the SX-Aurora TSUBASA Vector Engine. In: Wyrzykowski, R., Deelman, E., Dongarra, J., Karczewski, K. (eds) Parallel Processing and Applied Mathematics. PPAM 2019. Lecture Notes in Computer Science(), vol 12043. Springer, Cham. https://doi.org/10.1007/978-3-030-43229-4_21

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  • DOI: https://doi.org/10.1007/978-3-030-43229-4_21

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-43228-7

  • Online ISBN: 978-3-030-43229-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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