Dr. Tim Gerrits
Room K105
Phone: +49 241 80 28087
Fax: +49 241 80 22134
Email: Gerrits@vis.rwth-aachen.de

Lead of Visualization Team


Performance Assessment of Diffusive Load Balancing for Distributed Particle Advection

Ali Can Demiralp, Dirk Norbert Helmrich, Joachim Protze, Torsten Wolfgang Kuhlen, Tim Gerrits
30. International Conference in Central Europe on Computer Graphics, Visualization, and Computer Vision 2022 (WSCG2022)

Particle advection is the approach for the extraction of integral curves from vector fields. Efficient parallelization of particle advection is a challenging task due to the problem of load imbalance, in which processes are assigned unequal workloads, causing some of them to idle as the others are performing computing. Various approaches to load balancing exist, yet they all involve trade-offs such as increased inter-process communication, or the need for central control structures. In this work, we present two local load balancing methods for particle advection based on the family of diffusive load balancing. Each process has access to the blocks of its neighboring processes, which enables dynamic sharing of the particles based on a metric defined by the workload of the neighborhood. The approaches are assessed in terms of strong and weak scaling as well as load imbalance. We show that the methods reduce the total run-time of advection and are promising with regard to scaling as they operate locally on isolated process neighborhoods.

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