CSR: Small: Extending Smartphone Battery Life via Prescriptive Energy Profiling

CSR：小：通过规范的能量分析延长智能手机电池寿命

• 批准号: 1718854
• 负责人: Charlie Hu
• 金额: $ 47.5万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1718854&HistoricalAwards=false
• 关键词: CSR; Small; Extending; Smartphone; Battery

With over 2 billion users worldwide and over 2 million applications (apps) each in Google and Apple's digital marketplaces, smartphones have advanced human society into the mobile era. Despite the far-reaching societal impact of smartphones, the user experience has been severely limited by smartphone battery life. The obvious idea of extending smartphone battery life is to improve the battery technology, which, however, has stagnated in the past 15 years, and battery capacity is generally viewed as nearing the limits of physics. Instead, this project pursues a course of research to significantly extend smartphone battery life by reducing the energy drain of various software running on the smartphone.This project aims to tackle a major smartphone battery drain contributor, app energy drain when running in the foreground, with the goal of reducing it by 2x. The proposed research includes major thrusts that will develop the first set of prescriptive energy profiling techniques that will transform energy profiling from a "passive" app development step into a "proactive" process: (a) It will develop the first capability to automatically uncover the causal relationship between parameter configurations and framework/library method invocations, a unique and hard program analysis problem in framework-based mobile programming; (b) It will develop the first capability to automatically identify an energy-efficient implementation of similar tasks, a generally intractable problem but attainable for mobile apps by comparing similar apps that are widely available in the huge mobile app marketplace.The importance of this project is heightened by smartphones being an important enabler of Internet access for disadvantaged people in both developed and developing countries, and hence being an important tool in overcoming the "digital divide". Technically, this work will have a far-reaching impact outside of the area of developing energy efficient mobile apps by increasing compiler capabilities for general event-driven computer programs. A project repository will be maintained to provide access to code, raw experimental data showcasing the effectiveness of the developed techniques, and processed results and technical publications. The repository will be maintained during the three-year project period and the two years afterwards, to foster research activities by others in this important area.

智能手机在Google和Apple的数字市场中各自拥有超过20亿用户，并在Google和Apple的数字市场中分别拥有超过200万个应用程序（应用程序），将人类社会推向了移动时代。 尽管智能手机的社会影响深远，但用户体验受到智能手机电池寿命的严重限制。延长智能手机电池寿命的明显想法是改善电池技术，但是在过去的15年中一直停滞不前，并且通常将电池容量视为接近物理的限制。取而代之的是，该项目通过减少智能手机上运行的各种软件的能量消耗来大大延长智能手机电池寿命。该项目旨在应对主要的智能手机电池电池耗竭，在前景运行时App Energy Drain，目的是将其减少2倍。拟议的研究包括将开发第一组规定的能量分析技术的重大推力，这些技术将从“被动”应用程序开发步骤转变为“主动”过程：（a）它将开发出第一个能力，以自动揭示参数配置和框架/框架方法调查（独特和基于框架的移动程序中的参数配置）之间的因果关系； （b）它将开发出第一个能力，可以自动确定类似任务的能源有效实施，这是一个普通的问题，但可以通过比较在巨大的移动应用程序市场中广泛使用的类似应用程序来实现的移动应用程序，该项目的重要性是通过智能手机访问互联网和发展中的国家和跨国公司的互联网访问的重要性来提高的。 从技术上讲，这项工作将通过提高通用事件驱动的计算机程序来开发节能移动应用程序的领域外影响深远的影响。将维护项目存储库，以提供对代码的访问，原始的实验数据，展示了开发技术的有效性以及处理的结果和技术出版物。存储库将在三年的项目期间和两年内维护，以促进该重要领域的其他人的研究活动。

项目成果

Differential Energy Profiling: Energy Optimization via Diffing Similar Apps

差分能量分析：通过比较类似应用程序进行能量优化

• 发表时间: 2018
• 期刊: 13th USENIX Symposium on Operating Systems Design and Implementation
• 作者: Jindal, Abhilash;Hu, Y. Charlie
• 通讯作者: Hu, Y. Charlie