Parallel Implementation of the INM Atmospheric General Circulation Model on Distributed Memory Multiprocessors

Gloukhov, Val

doi:10.1007/3-540-46043-8_76

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…The atmosphere general circulation model uses a semi-implicit integration scheme that requires solving an auxiliary Helmholtz-type equation at each dynamical step. The current version uses a fast Fourier transform based algorithm and requires global data transposing for its parallel implementation [10].…”

Section: Inm Ras Earth System Modelmentioning

confidence: 99%

Analysis and Optimization of Output Operations in the INM RAS Earth System Model

2023

JSFI

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The modern development of complex Earth system models forces developers to take into account not only the computational efficiency, but also the performance of the data input and output. This work evaluates the data output performance of the INM RAS Earth system model and optimizes its weak points. The output operations were found to be surprisingly slow on the Cray XC40-LC supercomputer compared to the results obtained on the INM RAS cluster. To identify the bottleneck, the computational time, the distributed data gathering time, and the file system output time were measured separately. The distributed data gathering time was the cause of the slowdown on the Cray XC40-LC, so optimizations were made to the gathering routines without any additional rework of the existing output code. The optimizations resulted in a significant reduction in the overall model running time on the Cray XC40-LC, while the gathering time itself was reduced by a factor of 10 2 -10 3 . The results highlight the importance of optimizing the output performance in Earth system models.

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Section: Inm Ras Earth System Modelmentioning

confidence: 99%

Analysis and Optimization of Output Operations in the INM RAS Earth System Model

2023

JSFI

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“…We highlight some technical details of these approaches that could be interesting to application developers, not only from the area of climate studies but from other fields also. While an application of distributed memory paradigm to the full INM atmospheric general circulation model was described in [1], here we stress only on distributed memory implementation of its dynamical core responsible for integration of the governing equations. And the OpenMP paradigm was tested on the INM Ocean model that constitutes the ocean component of a coupled model [10].…”

Section: Introductionmentioning

confidence: 99%

*Parallel Computations in Problems of Climate Modeling

Gloukhov

2004

Parallel Computational Fluid Dynamics 2003

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The paper is focused on different approaches to parallel implementation of climate models on cluster multiprocessors. We present results of applying either MPI or OpenMP to the model components: atmospheric and oceanic blocks. A library of communication routines was developed for the distributed memory approach. It carries out the basic communication operations, such as boundary exchanges and transpositions of decomposed data. The library has quite general interface that makes it useful for parallelization of a wide range of scientific applications calculated on structured grids. In particular, we have examined it on INM AGCM as well as on a set of atmospheric benchmarks which integrate the equations of hydrothermodynamics of atmosphere under the hydrostatic assumption. An OpenMP implementation of the INM Ocean model has been undertaken and tested on few shared memory systems.

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Hierarchical Domain Representation in the AlgoWiki Encyclopedia: From Problems to Implementations

Antonov

Фролов

Konshin

et al. 2018

Communications in Computer and Information Science

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Parallel Implementation of the INM Atmospheric General Circulation Model on Distributed Memory Multiprocessors

Cited by 3 publications

References 2 publications

Analysis and Optimization of Output Operations in the INM RAS Earth System Model

Analysis and Optimization of Output Operations in the INM RAS Earth System Model

*Parallel Computations in Problems of Climate Modeling

Hierarchical Domain Representation in the AlgoWiki Encyclopedia: From Problems to Implementations

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