CSR: Medium: Collaborative Research: Architecture and System Support for Power-Agile Computing

CSR：媒介：协作研究：功耗敏捷计算的架构和系统支持

• 批准号: 1409014
• 负责人: Baris Taskin
• 金额: $ 27.88万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1409014&HistoricalAwards=false
• 关键词: CSR; Medium; Collaborative; Research; Architecture

Short battery lifetimes are one of the top complaints of today's smartphone users and are limiting the transformative potential of these mobile devices. Hardware components continue to offer new energy-saving features, but today's mobile operating systems are ill-prepared to utilize these new capabilities. This project investigates novel hardware-software coordination mechanisms to make use of existing and next-generation hardware energy-saving features more effectively. The focus is improving "power agility", a measure of a system's ability to adaptively reallocate energy between hardware components to meet the changing needs of running applications, through the introduction of new operating system interfaces and abstractions.In contrast to previous approaches that attempt to manage energy directly, this project explores the idea of measuring and managing energy inefficiency, defined as the amount of extra energy actually used to perform a task above the minimum required for the task. Allocating inefficiency, rather than energy, addresses many of the problems with previous energy management approaches while still allowing the operating system to prioritize energy usage between tasks. By allocating inefficiency, power-agile operating systems can safely allow tasks to tune hardware components directly using userspace tuning libraries, allowing them to make cross-component tradeoffs in response to changing requirements while pursuing a wide variety of different energy management strategies. The project also integrates education with the research through a new course on power-agile computing at both of the collaborating institutions.

电池寿命短是当今智能手机用户最抱怨的问题之一，并且限制了这些移动设备的变革潜力。硬件组件不断提供新的节能功能，但当今的移动操作系统还没有准备好利用这些新功能。该项目研究新颖的硬件-软件协调机制，以更有效地利用现有和下一代硬件节能功能。重点是提高“电源敏捷性”，通过引入新的操作系统接口和抽象，衡量系统在硬件组件之间自适应地重新分配能源以满足运行应用程序不断变化的需求的能力。与之前尝试直接管理能源的方法相比，该项目探索了测量和管理能源效率低下的想法，能源效率低下定义为实际用于执行任务所需的最低能源量。分配低效率而不是能源可以解决以前能源管理方法的许多问题，同时仍然允许操作系统在任务之间确定能源使用的优先级。通过分配低效率，电源敏捷操作系统可以安全地允许任务直接使用用户空间调整库来调整硬件组件，从而允许它们根据不断变化的需求进行跨组件权衡，同时追求各种不同的能源管理策略。该项目还通过两个合作机构开设的关于功耗敏捷计算的新课程将教育与研究结合起来。