Single Domain Multiple Decompositions for Particle-in-Cell simulations

As a multi-purpose Particle-In-Cell (PIC) code, SMILEI gathers many different features in a single software. Combining some of them is challenging. In particular, spectral solvers and patch based load balancing have a priori non compatible requirements. This paper introduces the Single Domain Multip...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1596; no. 1; pp. 12052 - 12059
Main Authors Derouillat, J., Beck, A.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.07.2020
Subjects
Algorithms
Domain decomposition methods
Load balancing
Particle in cell technique
Physics
Solvers
Synchronism
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Summary:As a multi-purpose Particle-In-Cell (PIC) code, SMILEI gathers many different features in a single software. Combining some of them is challenging. In particular, spectral solvers and patch based load balancing have a priori non compatible requirements. This paper introduces the Single Domain Multiple Decompositions (SDMD) method in order to address this issue. To do so, different domain decompositions are used for fields and particles operations. This approach allows to keep small domains for particles, necessary for a good load balancing, while having large domains for the fields. It proves beneficial in mitigating synchronization costs and gives the opportunity to introduce more paralellism in the PIC algorithm on top of providing structures compatible with spectral solvers.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1596/1/012052