Energy-Efficient High Performance Computing: Measurement and Tuning

In this work, the unique power measurement capabilities of the Cray XT architecture were exploited to gain an understanding of power and energy use, and the effects of tuning both CPU and network bandwidth. Modifications were made to deterministically halt cores when idle. Additionally, capabilities were added to alter operating P—state. At the application level, an understanding of the power requirements of a range of important DOE/NNSA production scientific computing applications running ...