Porting the Meso-NH atmospheric model on different GPU architectures for the next generation of supercomputers (version MESONH-v55-OpenACC)

Escobar, Juan; Wautelet, Philippe; Pianezze, Joris; Pantillon, Florian; Dauhut, Thibaut; Barthe, Christelle; Chaboureau, Jean-Pierre

doi:https://doi.org/10.5194/gmd-18-2679-2025

Articles | Volume 18, issue 9

https://doi.org/10.5194/gmd-18-2679-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-18-2679-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 9

Model description paper

|

14 May 2025

Model description paper |

| 14 May 2025

Porting the Meso-NH atmospheric model on different GPU architectures for the next generation of supercomputers (version MESONH-v55-OpenACC)

Juan Escobar, Philippe Wautelet, Joris Pianezze, Florian Pantillon, Thibaut Dauhut, Christelle Barthe, and Jean-Pierre Chaboureau

Data sets

Code and data for Porting the Meso-NH atmospheric model on different GPU architectures for the next generation of supercomputers (version MESONH-v55-OpenACC) Juan Escobar et al. https://doi.org/10.5281/zenodo.14872313

Model code and software

Meso-NH version MESONH-v55-OpenACC The Meso-NH developers https://src.koda.cnrs.fr/mesonh/mesonh-code/-/tree/6945dbddd4641e1d26d59343b1d44cc089238fb1

Short summary

The Meso-NH weather research code is adapted for GPUs using OpenACC, leading to significant performance and energy efficiency improvements. Called MESONH-v55-OpenACC, it includes enhanced memory management, communication optimizations and a new solver. On the AMD MI250X Adastra platform, it achieved up to 6× speedup and 2.3× energy efficiency gain compared to CPUs. Storm simulations at 100 m resolution show positive results, positioning the code for future use on exascale supercomputers.