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DOE OSTI · 2498423

New Results on Communication- and Memory-Aware Load Balancing Model and Algorithms

Lifflander, Jonathan Josiah [Sandia National Lab. (SNL-CA), Livermore, CA (United States)]·Pébaÿ, Philippe Pierre [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)]·Slattengren, Nicole [Sandia National Lab. (SNL-CA), Livermore, CA (United States)]·Pébaÿ, Pierre Louis [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)]·Schilly, Caleb William [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)]·Pfeiffer, Robert Anthony [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)]·Kotulski, Joseph D. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)]
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Abstract

While load balancing in distributed-memory computing has been well-studied, we present an innovative approach to this problem: a unified, reduced-order model that combines three key components to describe “work” in a distributed system: computation, communication, and memory. Our model enables an optimizer to explore complex tradeoffs in task placement, such as augmented parallelism, at the expense of data replication increasing memory usage. We propose a fully distributed, heuristic-based load balancing optimization algorithm, and demonstrate that it quickly finds close-to-optimal solutions. We formalize the complex optimization problem as a mixed-integer linear program, and compare it to our strategy. Finally, we show that when applied to an electromagnetics code, our approach obtains up to 2.3x speedups for the imbalanced execution.

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97 MATHEMATICS AND COMPUTING

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Lifflander, Jonathan Josiah [Sandia National Lab. (SNL-CA), Livermore, CA (United States)], Pébaÿ, Philippe Pierre [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)], Slattengren, Nicole [Sandia National Lab. (SNL-CA), Livermore, CA (United States)], Pébaÿ, Pierre Louis [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)], Schilly, Caleb William [Sandia National Lab. (SNL-CA), Livermore, CA (United States); NexGen Analytics, Sheridan, WY (United States)], Pfeiffer, Robert Anthony [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)], Kotulski, Joseph D. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)]. 2025-01-01. New Results on Communication- and Memory-Aware Load Balancing Model and Algorithms. https://doi.org/10.2172/2498423

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