<span class="var-sub_title">Energy Efficiency Modeling of Parallel Applications</span> SC18 Proceedings

The International Conference for High Performance Computing, Networking, Storage, and Analysis

Energy Efficiency Modeling of Parallel Applications

Authors: Mark Endrei (University of Queensland), Chao Jin (University of Queensland), Minh Ngoc Dinh (University of Queensland), David Abramson (University of Queensland), Heidi Poxon (Cray Inc), Luiz DeRose (Cray Inc), Bronis R. de Supinski (Lawrence Livermore National Laboratory)

Abstract: Energy efficiency has become increasingly important in high performance computing (HPC), as power constraints and costs escalate. Workload and system characteristics form a complex optimization search space in which optimal settings for energy efficiency and performance often diverge. Thus, we must identify trade-off options to find the desired balance. We present an innovative statistical model that accurately predicts the Pareto optimal trade-off options using only user-controllable parameters. Our approach can also tolerate both measurement and model errors. We study model training and validation using several HPC kernels, then with more complex workloads, including AMG and LAMMPS. We can calibrate an accurate model from as few as 12 runs, with prediction error of less than 10%. Our results identify trade-off options allowing up to 40% energy efficiency improvement at the cost of under 20% performance loss. For AMG, we reduce the required sample measurement time from 13 hours to 74 minutes.

Presentation: file

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