Performance-Portable Many-Core Plasma Simulations: Porting PIConGPU to OpenPower and Beyond

  • Erik Zenker
  • René Widera
  • Axel Huebl
  • Guido Juckeland
  • Andreas Knüpfer
  • Wolfgang E. Nagel
  • Michael Bussmann
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9945)

Abstract

With the appearance of the heterogeneous platform OpenPower, many-core accelerator devices have been coupled with Power host processors for the first time. Towards utilizing their full potential, it is worth investigating performance portable algorithms that allow to choose the best-fitting hardware for each domain-specific compute task. Suiting even the high level of parallelism on modern GPGPUs, our presented approach relies heavily on abstract meta-programming techniques, which are essential to focus on fine-grained tuning rather than code porting. With this in mind, the CUDA-based open-source plasma simulation code PIConGPU is currently being abstracted to support the heterogeneous OpenPower platform using our fast porting interface cupla, which wraps the abstract parallel C++11 kernel acceleration library Alpaka.

We demonstrate how PIConGPU can benefit from the tunable kernel execution strategies of the Alpaka library, achieving portability and performance with single-source kernels on conventional CPUs, Power8 CPUs and NVIDIA GPUs.

Keywords

OpenPower Heterogeneous computing HPC C++11 CUDA OpenMP Particle-in-cell Platform portability Performance portability 

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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  • Erik Zenker
    • 1
    • 2
  • René Widera
    • 1
  • Axel Huebl
    • 1
    • 2
  • Guido Juckeland
    • 1
  • Andreas Knüpfer
    • 2
  • Wolfgang E. Nagel
    • 2
  • Michael Bussmann
    • 1
  1. 1.Helmholtz-Zentrum Dresden–RossendorfDresdenGermany
  2. 2.Technische Universität DresdenDresdenGermany

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