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Parallèlisme des calculs numériques appliqué aux géosciences

Abstract : Discrete model resolution by numerical calculation benefits a dizzying number of industrial and general interest applications. It isalso necessary for heterogeneous machine evolutions to be exploited by calculation software. Thus, this thesis aims to explore theimpact of parallelism in modern architecture on geoscientific calculations. Consequently, this thesis work is particularly interestedin the categories of stencil resolution kernels and spectral finite elements. Work already carried out on these kernels consists instructuring, cutting and attacking the calculation in such a way as to exploit the resources of the machines in parallel. In addition,they also provide methods, models and tools for experimental analysis. Our approach consists in combining different parallelismcapacities for a given calculation kernel. Indeed, the latest Intel x86 processor developments have multiple superscalar, vector andmulti-core parallelism capabilities. The results of our work are consistent with those in the literature. First of all, we notice that theautomated vector optimizations of compilers are inefficient. In addition, the work of this thesis succeeds in refining the analysismodels. Thus, we observe an adequacy of the refined models with the experimental observations. In addition, the performanceachieved exceeds parallel reference implementations. These discoveries confirm the need to integrate these optimizations intocalculation abstraction solutions. Indeed, these solutions would better integrate the purpose of the calculations to be optimizedand can thus better couple them to the functioning of the target architectures.
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Submitted on : Tuesday, November 3, 2020 - 11:35:11 AM
Last modification on : Thursday, October 20, 2022 - 3:52:37 AM
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  • HAL Id : tel-02986761, version 1


Gauthier Sornet. Parallèlisme des calculs numériques appliqué aux géosciences. Autre [cs.OH]. Université d'Orléans, 2019. Français. ⟨NNT : 2019ORLE2009⟩. ⟨tel-02986761⟩



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