Performance measurements of MHD simulation for planetary magnetosphere on peta-scale computer FX10

Keiichiro Fukazawa, Takeshi Nanri, Takayuki Umeda

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Magnetohydrodynamic (MHD) simulations are often applied to study the global dynamics and configuration of the planetary magnetosphere. The computational performance of an MHD code is evaluated on a massive parallel scalar type supercomputer system with one PFlops ideal performance. We have made the performance tuning of our three-dimensional MHD code for the planetary magnetosphere on the FX10 which has 76,800 cores, distributed on 4,800 SPARC64 IXfx nodes. For the parallelization of the MHD code, we use four different methods, i.e. one-dimensional, two-dimensional, three-dimensional regular domain decomposition methods and a cache-hit type of three-dimensional domain decomposition method. We found that the cache-hit type of three-dimensional decomposition of the MHD model is suitable for the FX10 system. We also found the pack/unpack operation for the inter-node communications decreases the execution efficiency by 2 %. After asynchronous communication is introduced and the pack/unpack operation is overlapped, we achieved a computing performance of 230 TFlops and an efficiency of almost 20 % for the MHD code.

    Original languageEnglish
    Title of host publicationParallel Computing
    Subtitle of host publicationAccelerating Computational Science and Engineering (CSE)
    PublisherIOS Press BV
    Pages387-394
    Number of pages8
    ISBN (Print)9781614993803
    DOIs
    Publication statusPublished - Jan 1 2014

    Publication series

    NameAdvances in Parallel Computing
    Volume25
    ISSN (Print)0927-5452

    All Science Journal Classification (ASJC) codes

    • Computer Science(all)

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