CSR--EHS: Flow-Based Computer Systems Support for Synergistic Hardware-Software Management of Embedded Systems

CSR--EHS：基于流程的计算机系统支持嵌入式系统的软硬件协同管理

• 批准号: 0509402
• 负责人: Margaret Martonosi
• 金额: --
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0509402&HistoricalAwards=false
• 关键词: CSR; EHS; Flow; Based; Computer

Today's embedded systems have been designed in an ad hoc manner, each system re-designed from scratch to handle new system and software requirements. As requirements for embedded systems are changing rapidly, a key challenge is to develop general design methodologies that can scale to new VLSI technologies such as multiple cores on a billion-transistor embedded chip, new power-performance targets, and new-generation software systems. This research proposes a flow-based embedded system that focuses on an execution model based on flows and a corresponding embedded system platform based on the flow execution model. In a flow-based embedded system, the hardware dynamically adapts to (1) heterogeneity in an embedded system and (2) energy constraints while ensuring (3) real-time deadlines are met, and (4) the software is shielded from all the above hardware complexities through the flow execution model, and is thus (5) portable across hardware generations. Flows indicate all potential partition points in an application; thus they expose points that allow the systems software (and supporting hardware) to dynamically adapt the actual partitioning or parallelism in the face of real-time deadlines, energy and reliability constraints, and heterogeneity. The scope of the project includes investigating flow-parallelizing compiling techniques that automatically extract flows from sequential code, novel hardware mechanisms that ensure low-overhead dynamic execution adaptation, lightweight OS support for the flow model across a range of embedded applications.

今天的嵌入式系统都是以一种特别的方式设计的，每个系统都是从零开始重新设计的，以处理新的系统和软件需求。随着嵌入式系统需求的快速变化，一个关键的挑战是开发能够扩展到新的VLSI技术的通用设计方法，如十亿晶体管嵌入式芯片上的多核、新的功耗性能目标和新一代软件系统。本研究提出了一种基于流程的嵌入式系统，重点研究了基于流程的执行模型和相应的基于流程执行模型的嵌入式系统平台。在基于流的嵌入式系统中，硬件动态适应(1)嵌入式系统的异构性和(2)能量约束，同时确保(3)满足实时截止日期，(4)通过流执行模型屏蔽所有上述硬件复杂性，因此(5)跨硬件代的可移植性。流指示应用程序中所有潜在的分区点；因此，它们暴露了允许系统软件（和支持硬件）在面对实时截止日期、能量和可靠性约束以及异构性时动态适应实际分区或并行性的点。该项目的范围包括研究从顺序代码中自动提取流的流并行编译技术、确保低开销动态执行适应的新型硬件机制、跨一系列嵌入式应用程序流模型的轻量级操作系统支持。