CSR: Small: Collaborative Research: Generalized Reliability-Aware Power Management for Real-Time Embedded Systems

几十年来，计算机系统的设计和操作主要是由高性能目标驱动的。然而，随着半导体器件的大规模集成接近其物理极限，能量效率和鲁棒性最近已被提升为一流的设计约束。小型、便携式和电池供电的计算机的出现以及不断增加的功率密度要求提高能效，即使是连接到电网的计算机也受到严格的限制。此外，最近的研究表明，积极的电源管理技术可以显着增加计算机系统的脆弱性，瞬态故障（软错误），可能会导致在运行时的不正确的操作。这些问题更加突出的实时嵌入式系统，必须正确地执行在高可靠性水平，在严格的时间和能源constraines.In最近的过去，一些开拓性的可靠性意识的电源管理计划，提出了旨在减轻流行的动态电压和频率缩放的负面影响。 该项目正在解决现有解决方案的保守性问题，并制定一个更通用的框架。具体来说，该项目正在设计新的解决方案，通过使用共享恢复任务来实现任意可靠性级别。此外，该研究正在将该框架扩展到多处理器和新兴的多核平台。 该项目有两个主要的更广泛的影响方面：第一，能源意识对环境，经济和社会产生直接影响。第二，通过将可靠性提升为首要目标，该项目将有助于防止安全关键型计算机系统出现故障，保护财产和人命。

For decades, computer system design and operation were driven largely by high performance objectives. Yet, as the large scale integration of semi-conductor devices is approaching its physical limits, energy efficiency and robustness have been recently promoted to first-class design constraints. Energy efficiency is mandated by the emergence of small foot-print, portable, and battery-powered computers as well as ever-increasing power density that puts stringent constraints even on computers connected to the power grid. Moreover, recent research has revealed that aggressive power management techniques can significantly increase vulnerabilities of computer systems to transient faults (soft errors) that can cause incorrect operations at run-time. These problems are even more pronounced for real-time embedded systems that must perform correctly at high reliability levels, under strict timing and energy constraints.In recent past, a number of pioneering reliability-aware power management schemes were proposed that aim at mitigating the negative effects of the popular dynamic voltage and frequency scaling. This project is addressing the conservatism of the existing solutions and developing a more general framework. Specifically, the project is devising novel solutions to achieve arbitrary reliability levels through the use of shared recovery tasks. In addition, the research is extending the framework to multiprocessor and emerging multicore platforms. The project has two major broader impact dimensions: First, energy-awareness has a direct impact on environment, economy, and society at large. Second, by promoting reliability to a first-order objective, the project will help to prevent malfunctions in safety-critical computer systems and protect property and human lives.