MPI to Coarray Fortran: Experiences with a CFD Solver for Unstructured Meshes

Sharma, Anuj; Moulitsas, Irene

doi:10.1155/2017/3409647

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…It has been noted in the literature that different hardware platforms, coupled with different software environments and compiler vendors, can result in performance variation [29].…”

Section: Hardware and Softwarementioning

confidence: 99%

Fortran Coarray Implementation of Semi-Lagrangian Convected Air Particles within an Atmospheric Model

et al. 2021

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This work added semi-Lagrangian convected air particles to the Intermediate Complexity Atmospheric Research (ICAR) model. The ICAR model is a simplified atmospheric model using quasi-dynamical downscaling to gain performance over more traditional atmospheric models. The ICAR model uses Fortran coarrays to split the domain amongst images and handle the halo region communication of the image’s boundary regions. The newly implemented convected air particles use trilinear interpolation to compute initial properties from the Eulerian domain and calculate humidity and buoyancy forces as the model runs. This paper investigated the performance cost and scaling attributes of executing unsaturated and saturated air particles versus the original particle-less model. An in-depth analysis was done on the communication patterns and performance of the semi-Lagrangian air particles, as well as the performance cost of a variety of initial conditions such as wind speed and saturation mixing ratios. This study found that given a linear increase in the number of particles communicated, there is an initial decrease in performance, but that it then levels out, indicating that over the runtime of the model, there is an initial cost of particle communication, but that the computational benefits quickly offset it. The study provided insight into the number of processors required to amortize the additional computational cost of the air particles.

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“…It has been noted in the literature that different hardware platforms, coupled with different software environments and compiler vendors, can result in performance variation [29].…”

Section: Hardware and Softwarementioning

confidence: 99%

Fortran Coarray Implementation of Semi-Lagrangian Convected Air Particles within an Atmospheric Model

et al. 2021

Self Cite

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“…We therefore recommend the support of parallel evaluations of the process models on multiple cores (e.g. with Co-array Fortran and/or MPI [39,40,41])…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The Monte Carlo driven and machine learning enhanced process simulator

Jones

Frutiger

Ince³

et al. 2019

Computers & Chemical Engineering

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“…Although these features have seen relatively slow implementation by the compiler vendors, applications that use native parallel features are becoming more common (e.g., Garain, Balsara, and Reid 2015;Mozdzynski, Hamrud, and Wedi 2015;Shterenlikht, Margetts, and Cebamanos 2018;Curcic 2019;Diaz et al 2021). Today, Fortran remains the dominant language used on top High Performance Computing (HPC) systems, with applications to weather and climate (Powers et al 2017;Skamarock, Ong, and Klemp 2021), computational chemistry ( Čertík, Pask, and Vackář 2013;Apra et al 2020), computational fluid dynamics (Sharma and Moulitsas 2017), life science (Aguilar et al 2018;Vandenplas et al 2020), and economics (Harrison and Pearson 1996;Fehr and Kindermann 2018).…”

Section: Introductionmentioning

confidence: 99%

Toward Modern Fortran Tooling and a Thriving Developer Community

Curcic¹,

Čertı́k²,

Richardson³

et al. 2021

Preprint

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Fortran is the oldest high-level programming language that remains in use today and is one of the dominant languages used for compute-intensive scientific and engineering applications. However, Fortran has not kept up with the modern software development practices and tooling in the internet era. As a consequence, the Fortran developer experience has diminished. Specifically, lack of a rich general-purpose library ecosystem, modern tools for building and packaging Fortran libraries and applications, and online learning resources, has made it difficult for Fortran to attract and retain new users. To address this problem, an open source community has formed on GitHub in 2019 and began to work on the initial set of core tools: a standard library, a build system and package manager, and a communitycurated website for Fortran. In this paper we report on the progress to date and outline the next steps.

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MPI to Coarray Fortran: Experiences with a CFD Solver for Unstructured Meshes

Cited by 4 publications

References 16 publications

Fortran Coarray Implementation of Semi-Lagrangian Convected Air Particles within an Atmospheric Model

Fortran Coarray Implementation of Semi-Lagrangian Convected Air Particles within an Atmospheric Model

The Monte Carlo driven and machine learning enhanced process simulator

Toward Modern Fortran Tooling and a Thriving Developer Community

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