We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Near-global climate simulation at 1km resolution: establishing a performance baseline on 4888 GPUs with COSMO 5.0.
- Authors
Fuhrer, Oliver; Chadha, Tarun; Hoefler, Torsten; Kwasniewski, Grzegorz; Lapillonne, Xavier; Leutwyler, David; Lüthi, Daniel; Osuna, Carlos; Schär, Christoph; Schulthess, Thomas C.; Vogt, Hannes
- Abstract
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 ultrahighresolution 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 domainspecific 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 596MWh 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.
- Subjects
CLIMATE change; ATMOSPHERIC models; CLIMATOLOGY; GLOBAL temperature changes; EARTH system science
- Publication
Geoscientific Model Development, 2018, Vol 11, Issue 4, p1665
- ISSN
1991-959X
- Publication type
Article
- DOI
10.5194/gmd-11-1665-2018