CNS Core: Small: Lease-based, Utilitarian Mobile System Design to Enable Energy-Efficient Apps

移动设备是一个普适计算平台，具有丰富的编程接口集，可供第三方开发人员编写软件应用程序。然而，移动应用程序编程具有挑战性。软件开发人员需要考虑用户交互、移动应用程序运行条件的变化，并仔细监控移动设备上的资源。因此，许多移动应用程序存在软件错误（bug），这些错误会浪费能量并导致电池快速放电。该项目的目标是提供一个全面的解决方案，以减少由软件错误造成的能源浪费，并使应用程序开发人员能够创建节能应用程序。具体来说，该项目通过收集运行时信息和描述能量错误行为来研究具有能量错误的实际应用程序的行为。这个项目然后探索一个实用的移动操作系统设计与一个新的抽象租约，有效地管理移动资源，即使当应用程序有能量错误。为了方便应用程序开发人员利用新的操作系统设计，该项目进一步为开发人员设计了新的接口，用于定义自定义实用程序，一个库用于在应用程序运行时对实用程序和能源效率执行在线优化，以及一个能源分析器用于优化低实用程序代码。如今，移动应用程序为我们的日常生活提供了不可或缺的服务。建筑节能应用变得越来越重要。该项目可以有效地提高我们对应用程序运行时行为的理解，显著减少潜在的能源错误的影响，并帮助应用程序开发人员更轻松地构建节能应用程序。该项目还将通过让学生接触到现实世界的挑战和建筑节能应用的设计原则，促进教学、推广和培训。项目成果包括论文出版物、技术报告、演示文稿、课程材料、数据集和软件。研究结果将在https://www.cs.jhu.edu/~huang上提供下载，并在项目完成后至少保留五年。新的移动操作系统设计的源代码也将在GitHub上发布。该奖项反映了美国国家科学基金会的法定使命，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。

Mobile devices are a pervasive computing platform with a rich set of programming interfaces for third-party developers to write software applications. However, mobile application programming is challenging. Software developers need to consider user interactions, changes in the conditions in which the mobile application is running, and carefully monitor resources on the mobile device. As a result, many mobile applications have software errors (bugs) that waste energy and cause the battery to be discharged quickly. The goal of this project is to provide a comprehensive solution to reduce energy waste caused by software bugs and enable application developers to create energy-efficient apps.Specifically, the project studies how real-world applications with energy bugs behave by collecting their runtime information and characterizing the energy misbehavior. This project then explores a utilitarian mobile operating system design with a new abstraction lease, to manage mobile resources efficiently even when applications have energy bugs. To facilitate application developers to leverage the new operating system design, this project further designs new interfaces for developers to define custom utility, a library to perform online optimization on utility and energy efficiency at application runtime, and an energy profiler to optimize low-utility code.Mobile applications today provide services integral to our daily life. Building energy-aware applications is ever more important. This project can effectively improve our understanding of application runtime behavior, significantly reduce the impact of potential energy bugs, and help application developers more easily build energy-efficient applications. This project will also promote teaching, outreach, and training by exposing students to the real-world challenges and design principles in building energy-aware applications.The project outcomes include paper publications, technical reports, presentations, course material, datasets, and software. The outcomes will be made available for download at https://www.cs.jhu.edu/~huang and be maintained for at least five years beyond the completion of the project. The source code of the new mobile operating system design will also be released and available on GitHub.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.