Dynamic Load Balancing Techniques for Particulate Flow Simulations

Rettinger C, Rüde U (2019)

Publication Type: Journal article

Publication year: 2019


Book Volume: 7

Journal Issue: 1

URI: https://www.mdpi.com/2079-3197/7/1/9

DOI: 10.3390/computation7010009

Open Access Link: https://www.mdpi.com/2079-3197/7/1/9


Parallel multiphysics simulations often suffer from load imbalances originating from the applied coupling of algorithms with spatially and temporally varying workloads. It is, thus, desirable to minimize these imbalances to reduce the time to solution and to better utilize the available hardware resources. Taking particulate flows as an illustrating example application, we present and evaluate load balancing techniques that tackle this challenging task. This involves a load estimation step in which the currently generated workload is predicted. We describe in detail how such a workload estimator can be developed. In a second step, load distribution strategies like space-filling curves or graph partitioning are applied to dynamically distribute the load among the available processes. To compare and analyze their performance, we employ these techniques to a benchmark scenario and observe a reduction of the load imbalances by almost a factor of four. This results in a decrease of the overall runtime by 14% for space-filling curves.

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Rettinger, C., & Rüde, U. (2019). Dynamic Load Balancing Techniques for Particulate Flow Simulations. Computation, 7(1). https://doi.org/10.3390/computation7010009


Rettinger, Christoph, and Ulrich Rüde. "Dynamic Load Balancing Techniques for Particulate Flow Simulations." Computation 7.1 (2019).

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