CNS Core: Small: Rethinking Runtime Power Management for Mobile System-on-a-Chip

CNS 核心：小型：重新思考移动片上系统的运行时电源管理

• 批准号: 2016422
• 负责人: Lin Zhong
• 金额: $ 48.87万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-01-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2016422&HistoricalAwards=false
• 关键词: CNS; Core; Small; Rethinking; Runtime

Runtime power management (PM) is concerned with putting idle components of a computer system into power-saving modes while the system is still serving its user. Power management is increasingly important to the battery lifetime and thermal management of mobile systems whose computational heart, a system-on-a-chip (SoC), often integrates tens and hundreds of components and billions of transistors. Existing systems reply on device drivers for runtime PM. A device driver is a software program that controls a particular type of hardware device attached to a computer. This approach to PM not only leads to unoptimized, or often complete absence of runtime PM in widely used mobile systems, but also incurs high overhead by engaging the high-power central processing unit (CPU). The goal of this project is to relieve device drivers and the CPU of runtime PM by completely rethinking runtime PM of mobile SoCs. First, it will investigate a novel architecture in which a single operating system entity reasons whether a SoC component is idle without involving its device driver. Second, the project will contribute to operating system support such that the runtime PM logic can be entirely realized on an ultra-low-power computing core available in modern mobile systems. The project will prototype and evaluate its technical innovations with Android/Linux-based testbeds and Field-Programmable Gate Array (FPGA)-based SoC prototyping hardware.The project will leverage collaborations with industry leaders to ensure a timely transfer of technologies into industry and a broad impact on the commercial development of mobile systems and their SoCs. The project will provide new modules for teaching mobile and embedded systems and a platform to engage high-school and minority students. As mobile systems are providing access to information technologies to underserved populations and being adopted for professional uses, by improving their battery lifetime and therefore usability, the project will have a positive socio-economic impact globally. Research results will be published in academic conferences and journals. Resulting hardware design, software, and data will be made open-source and freely available at a repository accessible from http://download.recg.org. This repository will be maintained at least five years after the project is completed.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

可编程电源管理（PM）涉及在系统仍在为其用户服务时将计算机系统的空闲组件置于省电模式。 功率管理对于移动的系统的电池寿命和热管理越来越重要，移动系统的计算核心是片上系统（SoC），通常集成数十个和数百个组件以及数十亿个晶体管。现有系统在设备驱动程序上响应运行时PM。 设备驱动程序是一种软件程序，它控制连接到计算机的特定类型的硬件设备。 这种PM方法不仅导致在广泛使用的移动的系统中未优化或通常完全不存在运行时PM，而且还由于占用高功率中央处理单元（CPU）而引起高开销。本项目的目标是通过对移动的SoC的运行时PM进行彻底的反思，来减轻设备驱动程序和CPU的运行时PM。首先，它将研究一种新的架构，其中单个操作系统实体的原因是否SoC组件是空闲的，而不涉及其设备驱动程序。 其次，该项目将有助于操作系统的支持，使运行时PM逻辑可以完全实现在一个超低功耗的计算核心，在现代移动的系统。该项目将利用基于Android/Linux的测试平台和基于现场可编程门阵列（FPGA）的SoC原型硬件对其技术创新进行原型设计和评估。该项目将利用与行业领导者的合作，确保技术及时转移到行业，并对移动的系统及其SoC的商业开发产生广泛影响。该项目将为移动的和嵌入式系统的教学提供新的模块，并为高中和少数民族学生提供一个平台。由于移动的系统正在为得不到充分服务的人口提供信息技术，并通过延长电池寿命和提高可用性而被用于专业用途，该项目将在全球产生积极的社会经济影响。 研究成果将发表在学术会议和期刊上。由此产生的硬件设计、软件和数据将开源，并可从http://download.recg.org访问的存储库中免费获得。 该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

POD: A Smartphone That Flies

• DOI: 10.1145/3469259.3470490
• 发表时间: 2021-05
• 期刊: Proceedings of the 7th Workshop on Micro Aerial Vehicle Networks, Systems, and Applications
• 作者: Guojun Chen;Noah Weiner;Lin Zhong

Theseus: an experiment in operating system structure and state management

Theseus：操作系统结构和状态管理的实验

• 发表时间: 2020
• 期刊: Proc. USENIX Symposium on Operating Systems Design and Implementation (OSDI
• 作者: Boos, Kevin;Liyanage, Namitha;Ijaz, Ramla;Zhong, Lin
• 通讯作者: Zhong, Lin