CSR-EHS: System-Wide Dynamic Voltage Scaling and Power Management in Battery-Powered Embedded Systems

计算机系统设计者面临的关键问题之一是能源的管理和保护。这一挑战在许多方面都很明显。目标可以是延长包括处理器和多个存储器模块、I/O核和桥的计算机系统中的电池寿命。考虑到典型便携式电子系统中的功耗正在快速增加而其电池源的重量能量密度正在以慢得多的速度改进的事实，这是特别重要的。其他目标可以是限制计算机系统的冷却要求或减少操作大型计算设施的财务负担。本研究的目的是开发系统范围的功耗优化算法和技术，消除浪费或开销，并允许节能使用各种内存和I/O设备，同时满足整体性能要求。更确切地说，该项目解决了两个相关的问题：动态电压和频率缩放，目标是最大限度地减少总系统能量耗散和全局功率管理，系统中的模块可能由自己的本地功率管理策略管理，但必须密切相互作用，以产生最大的系统范围的能源效率。该项目的更广泛影响包括开发能源感知计算机系统，作为在电池供电的便携式平台上运行的大量高性能应用程序的成本效益实现的关键，以及对年轻研究人员和工程师的教育和培训，使他们能够解决在设计下一代电子产品时出现的复杂和相互交织的能源效率/性能挑战。信息技术产品和服务。

One of the key problems confronting computer system designers is the management and conservation of energy sources. This challenge is evident in a number of ways. The goal may be to extend the battery lifetime in a computer system comprising of a processor and a number of memory modules, I/O cores, and bridges. This is especially important in light of the fact that power consumption in a typical portable electronic system is increasing rapidly whereas the gravimetric energy density of its battery source is improving at a much slower pace. Other goals may be to limit the cooling requirements of a computer system or to reduce the financial burden of operating a large computing facility. The objective of this research is to develop system-wide power optimization algorithms and techniques that eliminate waste or overhead and allow energy-efficient use of the various memory and I/O devices while meeting an overall performance requirement. More precisely, this project tackles two related problems: dynamic voltage and frequency scaling targeting the minimization of the total system energy dissipation and global power management in a system comprising of modules that are potentially managed by their own local power management policies, yet must closely interact with one another in order to yield maximum system-wide energy efficiency. The broader impacts of this project include the development of energy-aware computer systems as the key for cost-effective realization of a large number of high-performance applications running on battery-powered portable platforms and the education and training of young researchers and engineers to be able to address complex and intertwined energy efficiency/performance challenges that arise in the context of designing next-generation information technology products and services.