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SCHEDULE: NOV 12-18, 2011

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World-highest Resolution Global Atmospheric Model and Its Performance on the Earth Simulator

SESSION: State of the Practice - Applications

EVENT TYPE: State of the Practice

TIME: 11:30AM - 12:00PM

SESSION CHAIR: Julia Mullen

AUTHOR(S):Keiko Takahashi, Koji Goto, Yoshinori Tsuda, Yuki Tochihara, Ken’ichi Itakura, Satoru Okura, Kunihiko Watanabe, Hiromitsu Fuchigami, Akira Azami, Kenryo Kataumi, Jun-ichi Yamamoto, Hiroshi Takahara, Toshifumi Takei, Yoshiyuki Kubo, Yoko Isobe

ROOM:TCC 202

ABSTRACT:
Mechanisms of interactions among different scale phenomena play important roles for forecasting of weather and climate. Multi-scale Simulator for the Geoenvironment (MSSG), which deals with multi-scale multi-physics phenomena, is a coupled non-hydrostatic atmosphere-ocean model designed to be run efficiently on the Earth Simulator. We present its simulation results with the world-highest 1.9km horizontal resolution for the entire globe. To gain high performance by exploiting the system capabilities, we propose novel performance evaluation metrics that incorporate the effects of the data caching mechanism between CPU and memory. A potentially attainable computational performance is also introduced by evaluating both computational and memory intensities. With the useful code optimization guideline based on such metrics, we demonstrate that MSSG can achieve an excellent peak performance ratio of 32.2% on the Earth Simulator with the single-core performance found to be a key to reduced time-to-solution.

Chair/Author Details:

Julia Mullen (Chair) - MIT Lincoln Laboratory

Keiko Takahashi - Japan Agency for Marine-Earth Science and Technology

Koji Goto - NEC Corporation

Yoshinori Tsuda - NEC Corporation

Yuki Tochihara - NEC Soft, Ltd.

Ken’ichi Itakura - Japan Agency for Marine-Earth Science and Technology

Satoru Okura - Japan Agency for Marine-Earth Science and Technology

Kunihiko Watanabe - Japan Agency for Marine-Earth Science and Technology

Hiromitsu Fuchigami - NEC Informatec Systems, Ltd.

Akira Azami - NEC Informatec Systems, Ltd.

Kenryo Kataumi - NEC Soft, Ltd.

Jun-ichi Yamamoto - NEC Corporation

Hiroshi Takahara - NEC Corporation

Toshifumi Takei - NEC Corporation

Yoshiyuki Kubo - NEC Corporation

Yoko Isobe - NEC Computertechno, Ltd.

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The full paper can be found in the ACM Digital Library

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