使用寄存器的值相似度来减轻软错误

A. Eker, O. Ergin
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引用次数: 2

摘要

由宇宙粒子或集成电路封装材料辐射引起的软误差是一个日益重要的设计问题。随着特征尺寸的不断缩小,无序超标量管道的数据路径组件越来越容易出现软错误。作为当代微处理器中主要的数据保存部件,寄存器文件已经成为处理器的重要组成部分,研究人员在其上提出了许多防止软错误的方案。我们首先观察到,寄存器文件中的许多存储值彼此之间的汉明距离非常小。在显示此分析结果之后,我们提出了一种软纠错方案,该方案利用多个寄存器值的存在,这些寄存器值彼此之间的汉明距离为零。我们使用这种已经可用的冗余以及奇偶校验保护来实现对许多存储值的纠错。我们的结果表明,通过采用利用寄存器文件中已有的值副本的方案,可以检测并纠正39.0%的错误,而额外的功耗为18.9%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Using value similarity of registers for soft error mitigation
Soft errors caused by the cosmic particles or the radiation from the packaging material of the integrated circuits are an increasingly important design problem. With the shrinking feature sizes, the datapath components of the out-of-order superscalar pipeline are becoming more prone to soft errors. Being the major data holding component in contemporary microprocessors, the register file has been an important part of the processor on which researchers offered many different schemes to protect against soft errors. We start with the observation that many of the stored values inside the register file have very small Hamming distances when compared to each other. After showing this analysis results we propose a soft error correction scheme that makes use of the presence of multiple register values that have zero Hamming distance from each other. We use this already available redundancy along with parity protection to achieve error correction for many of the stored values. Our results show that, by employing schemes that make use of the already available copies of the values inside the register file, it is possible to detect and correct 39.0% of the errors with an additional power consumption of 18.9%.
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