片上波动影响下的Mesh结构时钟系统的性能分析方法

发布时间：2019-03-30 17:23

【摘要】：考虑到片上波动对Mesh结构时钟系统的影响,提出了一种基于统计理论的时钟系统性能分析方法。该方法的核心思想是在真实的解析函数难以求解的情况下,采用统计分析方法对该函数进行拟合。从两方面着手研究:如何拟合时钟偏差的概率分布;如何拟合前驱动层时钟路径的时延对时钟偏差的影响。实验证明,时钟偏差的概率分布可用正态分布拟合,而前驱动层时钟路径的时延与时钟偏差的关系可采用多元线性回归模型进行拟合。因此,这套拟合方法使设计人员能够通过正态分布的概率分布函数评估不确定性约束是否合理;在设计后期,根据多元线性回归模型调节优化前驱动层,提高时钟系统的性能。
[Abstract]:Considering the influence of on-chip fluctuation on Mesh clock system, a performance analysis method of clock system based on statistical theory is proposed. The core idea of this method is that when the real analytic function is difficult to solve, the statistical analysis method is used to fit the function. It is studied from two aspects: how to fit the probability distribution of clock deviation and how to fit the effect of clock path delay on clock deviation in the front drive layer. The experimental results show that the probability distribution of clock deviation can be fitted by normal distribution, and the relationship between clock path delay and clock deviation in front drive layer can be fitted by multiple linear regression model. Therefore, this set of fitting methods enables designers to evaluate the rationality of uncertain constraints through the probability distribution function of normal distribution. At the later stage of design, the optimal pre-drive layer is adjusted according to the multivariate linear regression model to improve the performance of clock system.
【作者单位】：计算机体系结构国家重点实验室(中国科学院计算技术研究所);中国科学院计算技术研究所;中国科学院大学;龙芯中科技术有限公司;
【基金】：国家“核高基”科技重大专项(2009Z01028-002-003,2009Z01029-001-003,2010ZX01036-001-002,2012ZX01029-001-002,2014ZX01020201,2014ZX01030101) 国家自然科学基金(61521092,61133004,61173001,61232009,61222204,61432016) 863计划(2013AA014301)资助项目
【分类号】：TN40

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