期刊
GEOSCIENTIFIC MODEL DEVELOPMENT
卷 11, 期 4, 页码 1665-1681出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/gmd-11-1665-2018
关键词
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资金
- Swiss National Science Foundation [CRSII2_154486/1]
- Swiss National Supercomputing Centre
- PRACE
- Center for Climate Systems Modeling (C2SM)
- Federal Office of Meteorology and Climatology MeteoSwiss
- Swiss National Science Foundation (SNF) [CRSII2_154486] Funding Source: Swiss National Science Foundation (SNF)
The best hope for reducing long-standing global climate model biases is by increasing resolution to the kilometer scale. Here we present results from an ultrahigh-resolution non-hydrostatic climate model for a near-global setup running on the full Piz Daint supercomputer on 4888 GPUs (graphics processing units). The dynamical core of the model has been completely rewritten using a domain-specific language (DSL) for performance portability across different hardware architectures. Physical parameterizations and diagnostics have been ported using compiler directives. To our knowledge this represents the first complete atmospheric model being run entirely on accelerators on this scale. At a grid spacing of 930m (1.9 km), we achieve a simulation throughput of 0.043 (0.23) simulated years per day and an energy consumption of 596 MWh per simulated year. Furthermore, we propose a new memory usage efficiency (MUE) metric that considers how efficiently the memory bandwidth - the dominant bottleneck of climate codes - is being used.
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