TY - GEN
T1 - World-highest resolution global atmospheric model and its performance on the earth simulator
AU - Takahashi, Keiko
AU - Azami, Akira
AU - Tochihara, Yuki
AU - Kubo, Yoshiyuki
AU - Itakura, Ken'ichi
AU - Goto, Koji
AU - Kataumi, Kenryo
AU - Takahara, Hiroshi
AU - Isobe, Yoko
AU - Okura, Satoru
AU - Fuchigami, Hiromitsu
AU - Yamamoto, Jun Ichi
AU - Takei, Toshifumi
AU - Tsuda, Yoshinori
AU - Watanabe, Kunihiko
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Computational earth sciences
KW - Coupled atmosphere ocean model
KW - Earth simulator
KW - Memory efficiency
KW - Performance analysis
UR - http://www.scopus.com/inward/record.url?scp=83055180123&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=83055180123&partnerID=8YFLogxK
U2 - 10.1145/2063348.2063376
DO - 10.1145/2063348.2063376
M3 - Conference contribution
AN - SCOPUS:83055180123
SN - 9781450311397
T3 - State of the Practice Reports, SC'11
BT - State of the Practice Reports, SC'11
T2 - State of the Practice Reports, SC'11
Y2 - 12 November 2011 through 18 November 2011
ER -