A Highly Efficient Dynamical Core of Atmospheric General Circulation Model based on Leap-Format

被引：2
作者：
Cao, Hang [1 ,2 ]
Yuan, Liang [1 ]
Zhang, He [3 ]
Wu, Baodong [1 ,6 ]
Li, Shigang [5 ]
Lu, Pengqi [1 ,2 ]
Zhang, Yunquan [1 ]
Xu, Yongjun [4 ]
Zhang, Minghua [3 ]
机构：
[1] Chinese Acad Sci, Inst Comp Technol, State Key Lab Comp Architecture, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Beijing, Peoples R China
[3] Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China
[4] Chinese Acad Sci, Inst Comp Technol, Beijing, Peoples R China
[5] Swiss Fed Inst Technol, Dept Comp Sci, Zurich, Switzerland
[6] Sensetime Res, Hong Kong, Peoples R China
来源：
2020 IEEE 34TH INTERNATIONAL PARALLEL AND DISTRIBUTED PROCESSING SYMPOSIUM IPDPS 2020 | 2020年
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
dynamical core; leap-format finite-difference; shifting communication scheme; polar regions; filtering module; CLIMATE;
D O I：
10.1109/IPDPS47924.2020.00020
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The finite-difference dynamical core based on the equal-interval latitude-longitude mesh has been widely used for numerical simulations of the Atmospheric General Circulation Model (AGCM). Previous work utilizes different filtering schemes to alleviate the instability problem incurred by the unequal physical spacing at different latitudes, but they all incur high communication and computation overhead and become a scaling bottleneck. This paper proposes a new leap-format finite-difference computing scheme. It generalizes the usual finite-difference format with adaptive wider intervals and is able to maintain the computational stability in the grid updating. Therefore, the costly filtering scheme is eliminated. The new scheme is parallelized with a shifting communication method and implemented with fine communication optimizations based on a 3D decomposition. With the proposed leap-format computation scheme, the communication overhead of the AGCM is significantly reduced and good load balance is exhibited. The simulation results verify the correctness of the new leap-format scheme. The new scheme achieves the speed of 16.6 simulation-year-per-day (SYPD) and up to 3.3x speedup over the latest implementation.
引用
收藏
页码：95 / 104
页数：10
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