Document Type

Conference Proceeding



Format of Original

12 p.

Publication Date



Institute of Electrical and Electronics Engineers (IEEE)

Source Publication

2011 IEEE International Parallel & Distributed Processing Symposium (IPDPS)

Source ISSN


Original Item ID

doi: 10.1109/IPDPS.2011.22


Future large scale high performance supercomputer systems require high energy efficiency to achieve exaflops computational power and beyond. Despite the need to understand energy efficiency in high-performance systems, there are few techniques to evaluate energy efficiency at scale. In this paper, we propose a system-level iso-energy-efficiency model to analyze, evaluate and predict energy-performance of data intensive parallel applications with various execution patterns running on large scale power-aware clusters. Our analytical model can help users explore the effects of machine and application dependent characteristics on system energy efficiency and isolate efficient ways to scale system parameters (e.g. processor count, CPU power/frequency, workload size and network bandwidth) to balance energy use and performance. We derive our iso-energy-efficiency model and apply it to the NAS Parallel Benchmarks on two power-aware clusters. Our results indicate that the model accurately predicts total system energy consumption within 5% error on average for parallel applications with various execution and communication patterns. We demonstrate effective use of the model for various application contexts and in scalability decision-making


Accepted version. Published as part of the proceedings of the conference, Iso-energy-efficiency: An Approach to Power-Constrained Parallel Computation, 2011. DOI. © 2011 Institute of Electrical and Electronics Engineers (IEEE). Used with permission.