31 July 2016 to 5 August 2016
Gaylord Hotel and Conference Center
US/Eastern timezone

GPU Acceleration of Particle-In-Cell Methods

3 Aug 2016, 11:10
20m
Baltimore 2 (Gaylord Hotel)

Baltimore 2

Gaylord Hotel

Oral Working Group 2 WG2

Speaker

Dr. Benjamin Cowan (Tech-X Corporation)

Abstract

We describe an implementation of the particle-in-cell algorithm on graphics processing units, as part of a larger multiphysics framework. We discuss both the performance of the algorithm as well as methods used to make it sufficiently general for multiphysics applications.

Summary

Graphics processing units (GPUs) have become key components in many supercomputing systems, as they can provide more computations relative to their cost and power consumption than conventional processors. However, to take full advantage of this capability, they require a strict programming model which involves single-instruction multiple-data execution as well as significant constraints on memory accesses. To bring the full power of GPUs to bear on plasma physics problems, we must adapt the computational methods to this new programming model. We have developed a GPU implementation of the particle-in-cell (PIC) method, one of the mainstays of plasma physics simulation. This framework is highly general and enables advanced PIC features such as high order particles and absorbing boundary conditions. The main elements of the PIC loop, including field interpolation and particle deposition, are designed to optimize memory access. We describe the performance of these algorithms and discuss some of the methods used.

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Primary author

Dr. Benjamin Cowan (Tech-X Corporation)

Co-authors

John Cary (Tech-X Corporation) Scott Sides (Tech-X Corporation)

Presentation Materials

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