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Reports (Technical Report) Year : 2023

Frugal computations with NEMO latest versions on a NEC vector platform

Abstract

This note complements three other preliminary works, in which the performance of the NEMO ocean-only model was measured on NEC SX-Aurora TSUBASA (20B) and favorably compared with similar results on contemporary scalar platforms. In this document, we resume the study on similar vector engines, recently deployed on a higher number of nodes at the French CRIANN supercomputing mesocenter. The version upgrade (trunk, including RK3 time stepping) of our ocean model code, while conserving its vector properties, was easy. A direct energy consumption measurement reveals, for the most favourable but popular NEMO configuration (ORCA025), the x8 advantage of the vector platform compared to its Intel SkyLake competitor (x6 to IceLake). Beside the never ending race to electricity overconsumption and developers labour waste on esoteric hardware, this study shows that there is room for energy efficient and scientifically justified ocean simulations when performed on the suitable equipment

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Dates and versions

hal-03969033 , version 1 (02-02-2023)

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  • HAL Id : hal-03969033 , version 1

Cite

Eric Maisonnave. Frugal computations with NEMO latest versions on a NEC vector platform. WN/CMGC/23/17, CECI, UMR CERFACS/CNRS No5318. 2023. ⟨hal-03969033⟩

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