Extreme Scale Plasma Turbulence Simulations on Top Supercomputers Worldwide
SessionFluid Dynamics
Session ChairCarol Woodward
Authors
Event Type
Paper
Applications
Effective Application of HPC
Heterogeneous Systems
Intermediate
Performance
Scientific Computing
TimeWednesday, November 16th2pm - 2:30pm
Location255-EF
DescriptionThe goal of the extreme scale plasma turbulence studies described in this paper is to expedite the delivery of reliable predictions on confinement physics in large magnetic fusion systems by using world-class supercomputers to carry out simulations with unprecedented resolution and temporal duration. This has involved architecture-dependent optimizations of performance scaling and addressing code portability and energy issues, with the metrics for multi-platform comparisons being “time-to-solution” and “energy-to-solution”. Realistic results addressing how confinement losses caused by plasma turbulence scale from present-day devices to the much larger $25 billion international ITER fusion facility have been enabled by innovative advances in the GTC-P code including (i) implementation of one-sided communication from MPI 3.0 standard; (ii) optimization techniques on Xeon Phi processors; and (iii) development of a novel performance model for the key kernels of the PIC code. Results show that modeling data movement is sufficient to predict performance on modern supercomputer platforms.
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Paper provided by the IEEE Computer SocietyPaper also available from the ACM Digital Library
Authors
William Tang (presenting)
