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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
VERSION:1.0
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DTSTART:20111115T213000Z
DTEND:20111115T220000Z
LOCATION:TCC 202
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:ABSTRACT: A gyrokinetic toroidal five dimensional Eulerian code GT5D [Y.Idomura et. al., Comput. Phys. Commun 179, 391 (2008)] is ported on five advanced massively parallel platforms and comprehensive benchmark tests are performed. Sustained performances of the GT5D kernel and their dependency on the memory bandwidth are discussed. By using a novel multi-layer hybrid parallelization model, the size of MPI communicators can be suppressed below ~100 up to ~10^7 cores, and the scalability is improved on multi-core platforms. In strong scaling tests, a good scalability is confirmed up to several thousands cores on every platforms, and the maximum sustained performance of ~19.4 Tflops (the peak ratio of ~10.1%) is achieved using 16384 cores of BX900.
SUMMARY:Performance Evaluations of Gyrokinetic Eulerian Code GT5D on Massively Parallel Multi-Core Platforms
PRIORITY:3
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