CSR-EHS: An Enabling Substrate for Embedded and Hybrid Systems

嵌入式应用程序在性能和效率方面都有很高的要求。为了满足这些苛刻的要求，嵌入式系统正在转向并行性（为了性能）和专用硬件（为了效率）。这种趋势在嵌入式系统编程中造成了一对技术缺口。首先，很少有工具可以将嵌入式应用程序映射到并行系统。其次，为应用程序的计算要求高的部分使用专用硬件（asic）使得无法对应用程序的这些部分进行编程。该项目旨在缩小这两个技术差距。首先，该项目正在开发一个编程系统，用于将嵌入式系统映射到并行（多核）平台。这个系统需要？C？带有实时约束注释的代码，可以跨多个处理器自动划分操作，放置数据并协调通信和同步。分区将满足实时约束、平衡负载和最小化能耗。其次，该项目正在开发一个可编程的多核平台，以匹配嵌入式内核上硬连线（ASIC）逻辑的效率。该方法是优化数据和指令移动，以消除传统处理器的大部分开销和低效率。然后对处理器的设计进行优化，以缩小与asic的差距。这项研究有望使嵌入式系统设计复兴。它将使新兴多核平台的嵌入式系统能够快速发展，并将确保此类系统高效运行并满足实时限制。它还将使高效嵌入式系统的应用程序和算法的快速发展，为硬连线模块不存在。总的来说，这项研究旨在使嵌入式系统的开发成为可能，这些系统在当今的编程工具和平台上是不可行的。

Embedded applications are very demanding in terms of both performance and efficiency. To meet these demanding requirements embedded systems are turning to parallelism (for performance) and special-purpose hardware (for efficiency). This trend has created a pair of technology gaps in programming of embedded systems. First, few tools exist to map embedded applications to parallel systems. Second, using special-purpose hardware (ASICs) for the computationally demanding parts of applications makes it impossible to program these parts of the applications. This project seeks to close both of these technology gaps. First, the project is developing a programming system for mapping embedded systems to parallel (multi-core) platforms. This system takes ?C? code, annotated with real-time constraints, and automatically partitions operations across multiple processors, placing data and coordinating communication and synchronization. The partitioning will be done to meet real-time constraints, to balance load, and to minimize energy consumed. Second, the project is developing a programmable multi-core platform that matches the efficiency of hard-wired (ASIC) logic on embedded kernels. The approach is to optimize data and instruction movement to eliminate much of the overhead and inefficiency of conventional processors. The design of the processor is then optimized to close the gap with ASICs.This research is expected to enable a renaissance in embedded system design. It will enable rapid development of embedded systems for emerging multi-core platforms and will ensure that such systems operate efficiently and meet real-time constraints. It will also enable the rapid development of efficient embedded systems for applications and algorithms for which hard-wired modules do not exist. Overall, this research seeks to make possible the development of embedded systems that simply are not feasible with today's programming tools and platforms.