Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices

Sudip K. Seal; Mark R. Cianciosa; Steven P. Hirshman; Andreas Wingen; Robert S. Wilcox; Ezekial A. Unterberg

doi:10.1109/ICPP.2017.37

Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices

Sudip K. Seal, Mark R. Cianciosa, Steven P. Hirshman, Andreas Wingen, Robert S. Wilcox, Ezekial A. Unterberg

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Scopus citations

Abstract

Fast, accurate three dimensional reconstructions of plasma equilibria, crucial for physics interpretation of fusion data generated within confinement devices like stellarators/ tokamaks, are computationally very expensive and routinely require days, even weeks, to complete using serial approaches. Here, we present a parallel implementation of the three dimensional plasma reconstruction code, V3FIT. A formal analysis to identify the performance bottlenecks and scalability limits of this new parallel implementation, which combines both task and data parallelism, is presented. The theoretical findings are supported by empirical performance results on several thousands of processor cores of a Cray XC30 supercomputer. Parallel V3FIT is shown to deliver over 40X speedup, enabling fusion scientists to carry out three dimensional plasma equilibrium reconstructions at unprecedented scales in only a few hours (instead of in days/weeks) for the first time.

Original language	English
Title of host publication	Proceedings - 46th International Conference on Parallel Processing, ICPP 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	282-291
Number of pages	10
ISBN (Electronic)	9781538610428
DOIs	https://doi.org/10.1109/ICPP.2017.37
State	Published - Sep 1 2017
Event	46th International Conference on Parallel Processing, ICPP 2017 - Bristol, United Kingdom Duration: Aug 14 2017 → Aug 17 2017

Publication series

Name	Proceedings of the International Conference on Parallel Processing
ISSN (Print)	0190-3918

Conference

Conference	46th International Conference on Parallel Processing, ICPP 2017
Country/Territory	United Kingdom
City	Bristol
Period	08/14/17 → 08/17/17

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This material is based upon work supported by the U.S. Department of Energy, Office of Fusion Energy Sciences under contract number DE-AC05-00OR22725. This research used resources at the Oak Ridge Leadership Computing Facility, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

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10.1109/ICPP.2017.37

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Seal, S. K., Cianciosa, M. R., Hirshman, S. P., Wingen, A., Wilcox, R. S., & Unterberg, E. A. (2017). Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices. In Proceedings - 46th International Conference on Parallel Processing, ICPP 2017 (pp. 282-291). Article 8025302 (Proceedings of the International Conference on Parallel Processing). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPP.2017.37

Seal, Sudip K. ; Cianciosa, Mark R. ; Hirshman, Steven P. et al. / Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices. Proceedings - 46th International Conference on Parallel Processing, ICPP 2017. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 282-291 (Proceedings of the International Conference on Parallel Processing).

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abstract = "Fast, accurate three dimensional reconstructions of plasma equilibria, crucial for physics interpretation of fusion data generated within confinement devices like stellarators/ tokamaks, are computationally very expensive and routinely require days, even weeks, to complete using serial approaches. Here, we present a parallel implementation of the three dimensional plasma reconstruction code, V3FIT. A formal analysis to identify the performance bottlenecks and scalability limits of this new parallel implementation, which combines both task and data parallelism, is presented. The theoretical findings are supported by empirical performance results on several thousands of processor cores of a Cray XC30 supercomputer. Parallel V3FIT is shown to deliver over 40X speedup, enabling fusion scientists to carry out three dimensional plasma equilibrium reconstructions at unprecedented scales in only a few hours (instead of in days/weeks) for the first time.",

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Seal, SK , Cianciosa, MR, Hirshman, SP, Wingen, A , Wilcox, RS & Unterberg, EA 2017, Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices. in Proceedings - 46th International Conference on Parallel Processing, ICPP 2017., 8025302, Proceedings of the International Conference on Parallel Processing, Institute of Electrical and Electronics Engineers Inc., pp. 282-291, 46th International Conference on Parallel Processing, ICPP 2017, Bristol, United Kingdom, 08/14/17. https://doi.org/10.1109/ICPP.2017.37

Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices. / Seal, Sudip K.; Cianciosa, Mark R.; Hirshman, Steven P. et al.
Proceedings - 46th International Conference on Parallel Processing, ICPP 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 282-291 8025302 (Proceedings of the International Conference on Parallel Processing).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Wingen, Andreas

AU - Wilcox, Robert S.

AU - Unterberg, Ezekial A.

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AB - Fast, accurate three dimensional reconstructions of plasma equilibria, crucial for physics interpretation of fusion data generated within confinement devices like stellarators/ tokamaks, are computationally very expensive and routinely require days, even weeks, to complete using serial approaches. Here, we present a parallel implementation of the three dimensional plasma reconstruction code, V3FIT. A formal analysis to identify the performance bottlenecks and scalability limits of this new parallel implementation, which combines both task and data parallelism, is presented. The theoretical findings are supported by empirical performance results on several thousands of processor cores of a Cray XC30 supercomputer. Parallel V3FIT is shown to deliver over 40X speedup, enabling fusion scientists to carry out three dimensional plasma equilibrium reconstructions at unprecedented scales in only a few hours (instead of in days/weeks) for the first time.

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Seal SK , Cianciosa MR, Hirshman SP, Wingen A , Wilcox RS , Unterberg EA. Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices. In Proceedings - 46th International Conference on Parallel Processing, ICPP 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 282-291. 8025302. (Proceedings of the International Conference on Parallel Processing). doi: 10.1109/ICPP.2017.37

Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices

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