CPA-CPL-T: Collaborative Research: REEact: A Robust Execution Environment for Fragile Multicore Systems

CPA-CPL-T：协作研究：REEact：适用于脆弱多核系统的稳健执行环境

• 批准号: 0811687
• 负责人: Mary Irwin
• 金额: $ 52.5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0811687&HistoricalAwards=false
• 关键词: CPA; CPL; Collaborative; Research; REEact

With the emergence of the multicore architecture comes the promise of integrating enormous computing power in a single chip, thereby enabling parallel computing in all types of platforms including handheld computers and desktop machines. Providing proper software support for applications is critical to harness the true power of this architecture. An inherent characteristic of multicores that presents a significant obstacle is runtime variation: reliability, energy/thermal behavior and process variation will vary across identically designed components of a multicore, producing a negative impact on application power consumption and performance. Runtime variation has been identified as one of the key problems that could block further scaling of circuits if not properly addressed. This research project is developing an advanced execution system, called a Robust Execution Environment (REEact), that dynamically mediates, controls and adapts an application's execution to the runtime resource landscape originating from runtime variations. It employs a combination of techniques in adapting both the hardware resources and the application software code to overcome the impact of runtime variations. At the hardware level, it adapts the resources, such as setting the speed/voltage of a node on the multicore. At the software level, REEact dynamically optimizes code, taking into account performance and power consumption due to runtime variations. It elicits the help of the OS in determining what resources to use in running the application. REEact informs the OS about information it dynamically discovers about latency, power, and application behavior. REEact is built as multi-layer hierarchical runtime system that interacts with the parallel application, the OS, and the underlying multicore architecture to ensure that maximum performance is achieved.

随着多核心体系结构的出现，有望将巨大的计算能力集成到单个芯片中，从而在包括手持计算机和台式机（包括手持计算机和台式机）在内的所有类型的平台中实现并行计算。为应用程序提供适当的软件支持对于利用该体系结构的真正力量至关重要。呈现重要障碍的多头器的固有特征是运行时变化：可靠性，能量/热行为和过程变化在多核的相同设计的组件中会有所不同，从而对应用程序功耗和性能产生负面影响。运行时变化已被确定为关键问题之一，如果无法正确解决，可以阻止电路的进一步缩放。该研究项目正在开发一个高级执行系统，称为强大的执行环境（REEACCT），该系统动态介导，控制和调整了应用程序的执行，以从运行时变化起源于运行时资源景观。它在调整硬件资源和应用程序软件代码的适应中采用了技术的组合来克服运行时变化的影响。在硬件级别上，它可以调整资源，例如设置多核心节点的速度/电压。在软件级别上，考虑到由于运行时变化而导致的性能和功耗，重新反复进行了动态优化代码。它在确定运行应用程序中使用的资源时会引起操作系统的帮助。 REEACCT将其动态发现有关延迟，功率和应用程序行为的信息通知操作系统。 REEACCT是作为多层层次运行时系统构建的，该系统与并行应用程序，OS和基础多层体系结构进行交互，以确保实现最大的性能。