Performance Evaluation of OhHelp'ed 3D Particle-in-Cell Simulation

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概要

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• We proposed an efficient and scalable load balancing method named OhHelp for Particle-in-Cell(PIC) simulations. This method simply and equally partitions the space domain, in which charged particles are distributed nonuniformly in general, so that each computation node works on each partitioned primary subdomain. Load imbalance problem caused by the nonuniformity of the particle distribution is solved by making every but one node also work on another subdomain where particles densely populate as its secondary subdomain together with a part of particles in it. We applied the OhHelp method to a production level full-3D PIC simulator for space plasma and evaluated its performance on our T2K Open Supercomputer. As a result, we confirmed our simulator is not only efficient showing 150-190 speedup with 256 CPU cores compared to the sequential execution of a reference simulator, but also scalable in terms of both the space domain size and the number of particles as the break down of execution times evidences.

• 2009-02-19

著者

• NAKASHIMA HIROSHI

  京大

• MIYAKE YOHEI

  京大

• USUI HIDEYUKI

  京大

• OMURA YOSHIHARU

  京大

関連論文

• Performance Evaluation of OhHelp'ed 3D Particle-in-Cell Simulation
• Performance Evaluation of OhHelp'ed 3D Particle-in-Cell Simulation
• OhHelp: a simple but efficient space-partitioned dynamic load balancing for particle simulations (ハイパフォーマンスコンピューティング)
• Performance evaluation of OhHelp'ed 3D particle-in-cell simulation (計算機アーキテクチャ・ハイパフォーマンスコンピューティング・「ハイパフォーマンスコンピューティングとアーキテクチャの評価」に関する北海道ワークショップ(HOKKE-2009))

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