Articles | Volume 15, issue 24
Development and technical paper
21 Dec 2022
Development and technical paper |  | 21 Dec 2022

Improving scalability of Earth system models through coarse-grained component concurrency – a case study with the ICON v2.6.5 modelling system

Leonidas Linardakis, Irene Stemmler, Moritz Hanke, Lennart Ramme, Fatemeh Chegini, Tatiana Ilyina, and Peter Korn


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Short summary
In Earth system modelling, we are facing the challenge of making efficient use of very large machines, with millions of cores. To meet this challenge we will need to employ multi-level and multi-dimensional parallelism. Component concurrency, being a function parallel technique, offers an additional dimension to the traditional data-parallel approaches. In this paper we examine the behaviour of component concurrency and identify the conditions for its optimal application.