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Improving ocean modeling software NEMO 4.0 benchmarking and communication efficiency

التفاصيل البيبلوغرافية
العنوان: Improving ocean modeling software NEMO 4.0 benchmarking and communication efficiency
المؤلفون: G. Irrmann, S. Masson, É. Maisonnave, D. Guibert, E. Raffin
المصدر: Geoscientific Model Development, Vol 15, Pp 1567-1582 (2022)
بيانات النشر: Copernicus Publications, 2022.
سنة النشر: 2022
المجموعة: LCC:Geology
مصطلحات موضوعية: Geology, QE1-996.5
الوصف: Communications in distributed memory supercomputers are still limiting scalability of geophysical models. Considering the recent trends of the semiconductor industry, we think this problem is here to stay. We present the optimizations that have been implemented in the 4.0 version of the ocean model NEMO to improve its scalability. Thanks to the collaboration of oceanographers and HPC experts, we identified and removed the unnecessary communications in two bottleneck routines, the computation of free surface pressure gradient, and the forcing in the straight or unstructured open boundaries. Since a wrong parallel decomposition choice could undermine computing performance, we impose its automatic definition in all cases, including when subdomains containing land points only are excluded from the decomposition. For a smaller audience of developers and vendors, we propose a new benchmark configuration, which is easy to use while offering the full complexity of operational versions.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1991-959X
1991-9603
Relation: https://gmd.copernicus.org/articles/15/1567/2022/gmd-15-1567-2022.pdf; https://doaj.org/toc/1991-959X; https://doaj.org/toc/1991-9603
DOI: 10.5194/gmd-15-1567-2022
URL الوصول: https://doaj.org/article/f7beadaaf39a465abe8e222c49a05058
رقم الأكسشن: edsdoj.f7beadaaf39a465abe8e222c49a05058
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:1991959X
19919603
DOI:10.5194/gmd-15-1567-2022