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On Topology Reconfiguration for Defect-Tolerant NoC-Based Homogeneous Manycore Systems

机译:基于容错NoC的均质Manycore系统的拓扑重新配置

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Homogeneous manycore systems are emerging for tera-scale computation and typically utilize Network-on-Chip (NoC) as the communication scheme between embedded cores. Effective defect tolerance techniques are essential to improve the yield of such complex integrated circuits. We propose to achieve fault tolerance by employing redundancy at the core-level instead of at the microarchitecture level. When faulty cores exist on-chip in this architecture, however, the physical topologies of various manufactured chips can be significantly different. How to reconfigure the system with the most effective NoC topology is a relevant research problem. In this paper, we first show that this problem is an instance of a well known NP-complete problem. We then present novel solutions for the above problem, which not only maximize the performance of the on-chip communication scheme, but also provide a unified topology to Operating System and application software running on the processor. Experimental results show the effectiveness of the proposed techniques.
机译:同类的多核系统正在涌现,用于万亿次计算,并且通常利用片上网络(NoC)作为嵌入式核之间的通信方案。有效的缺陷容忍技术对于提高此类复杂集成电路的成品率至关重要。我们建议通过在核心级别而不是在微体系结构级别采用冗余来实现容错。但是,当此架构中的芯片上存在有故障的内核时,各种制造的芯片的物理拓扑可能会明显不同。如何用最有效的NoC拓扑重新配置系统是一个相关的研究问题。在本文中,我们首先显示此问题是一个众所周知的NP完全问题的实例。然后,我们针对上述问题提出了新颖的解决方案,该解决方案不仅使片上通信方案的性能最大化,而且还为操作系统和处理器上运行的应用软件提供了统一的拓扑。实验结果表明了所提出技术的有效性。

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