TY - GEN
T1 - Parallel Reconstruction of Three Dimensional Magnetohydrodynamic Equilibria in Plasma Confinement Devices
AU - Seal, Sudip K.
AU - Cianciosa, Mark R.
AU - Hirshman, Steven P.
AU - Wingen, Andreas
AU - Wilcox, Robert S.
AU - Unterberg, Ezekial A.
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85030640876&partnerID=8YFLogxK
U2 - 10.1109/ICPP.2017.37
DO - 10.1109/ICPP.2017.37
M3 - Conference contribution
AN - SCOPUS:85030640876
T3 - Proceedings of the International Conference on Parallel Processing
SP - 282
EP - 291
BT - Proceedings - 46th International Conference on Parallel Processing, ICPP 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 46th International Conference on Parallel Processing, ICPP 2017
Y2 - 14 August 2017 through 17 August 2017
ER -
