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Energy Efficient High Performance Processors
Recent Approaches for Designing Green High Performance Computing
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This book looks into energy efficiency techniques of high performance computing (HPC) systems by using power-management methods. Using a step-by-step approach, the book describes power-management flows, algorithms and mechanism that are used today in modern processors such as Intel Sandybaridge, Haswell, Skylake and other architectures (e.g. ARM). It includes practical examples and recent studies demonstrating how modem processors manage wide power range dynamically, which scales from few milliwatts at deepest idle power state, to tens of watts at turbo state. Moreover, the book explains how thermal and power deliveries are managed in the existence of this huge power range. The book also explains about the different metrics for energy efficiency, it presents several methods and applications of the power and energy estimation, it shows how using innovative power estimation methods and new algorithms, modern processors are able to optimize metrics such as power, energy, performance and other metrics. Different power estimation tools are presented, including tool that breaks down the power consumption of modern processors at sub-processor core/thread granularity. To reduce power consumption, the book also looks into software, firmware and hardware coordination methods, for example a compiler assisted power management method to overcome power excursions is presented. Firmware algorithm for dynamic cache resizing and DVFS for memory sub-system is also discussed.
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