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Oakforest-PACSにおける大規模CFDコードの計算技術開発

Development of computing technologies for extreme scale CFD codes on Oakforest-PACS

井戸村 泰宏

Idomura, Yasuhiro

Oakforest-PACSのような省電力メニーコアプロセッサに基づくシステムで大規模CFDシミュレーションを行う上で、メニーコアプロセッサで演算を加速する技術や演算加速によって顕在化する通信処理やI/O処理を削減する技術が必要となる。上記課題の解決に向けてメニーコア最適化技術、通信隠蔽技術、省通信アルゴリズム、In-Situ可視化システムの開発をOakforest-PACSで進めてきた。講演では、これらの技術の5次元プラズマ流体コードや3次元多相熱流体コードへの適用事例を紹介する。

In performing extreme scale CFD simulations on many core platforms with low power consumption such as Oakforest-PACS, we need new computing technologies for accelerating computation on many core processors, and avoiding communications and data I/O, which become bottlenecks with accelerated computation. In order to resolve these issues, we have developed many core optimization techniques, communication latency hiding techniques, communication avoiding algorithms, and In-Situ visualization systems on Oakforest-PACS. In this talk, we present applications of these techniques to five dimensional plasma CFD codes and three dimensional multi-phase thermal hydraulic CFD codes.

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