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: 1907962
• 负责人: Lin Zhong
• 金额: $ 50万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1907962&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.

运行时电源管理(PM)涉及在系统仍在为其用户服务的同时将计算机系统的空闲组件置于省电模式。电源管理对于移动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)，通常集成数十和数百个组件和数十亿个晶体管。现有系统对运行时PM的设备驱动程序进行响应设备驱动程序是控制连接到计算机的特定类型硬件设备的软件程序。这种PM方法不仅导致在广泛使用的移动系统中没有运行时PM，甚至经常完全没有运行时PM，而且通过使用高功率中央处理单元(CPU)来产生高开销。这个项目的目标是通过彻底重新思考移动SoC的运行时PM来缓解设备驱动程序和CPU的运行PM。首先，它将研究一种新颖的体系结构，在该体系结构中，单个操作系统实体在不涉及其设备驱动程序的情况下推理SoC组件是否空闲。其次，该项目将有助于操作系统支持，以便运行时PM逻辑可以完全在现代移动系统中可用的超低功耗计算核心上实现。该项目将利用基于Android/Linux的试验床和基于现场可编程门阵列(FPGA)的SoC原型硬件来构建和评估其技术创新。该项目将利用与行业领先者的合作，确保技术及时转化为行业，并对移动系统及其SoC的商业开发产生广泛影响。该项目将为移动和嵌入式系统教学提供新的模块，并提供一个吸引高中生和少数族裔学生参与的平台。由于移动系统正在为服务不足的人群提供获取信息技术的途径，并被用于专业用途，因此通过改善电池寿命和可用性，该项目将在全球产生积极的社会经济影响。研究成果将在学术会议和期刊上发表。由此产生的硬件设计、软件和数据将成为开源的，并可在可从http://download.recg.org.访问的存储库中免费获得这个储存库将在项目完成后至少五年得到维护。这一奖励反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。