Formal Semantics of Predictable Pipelines: a Comparative Study

M. Jan, Mihail Asavoae, Martin Schoeberl, Edward A. Lee
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引用次数: 7

Abstract

Computer architectures used in safety-critical domains are subjected to worst-case execution time analysis. The presence of performance-driven microarchitectures may trigger undesired timing phenomena, called timing anomalies, and complicate the timing analysis. This paper investigates pipelines specifically designed to simplify the worst-case execution time analysis (also called predictable pipelines). We propose formal and executable models of four research-oriented pipelines and one industrial pipeline to validate some of their claims related to their timing behavior. We indeed validate, via bounded model checking, the absence of a type of timing anomalies called amplification timing anomalies, or its potential presence by identifying prerequisite to situations where they can occur.
可预测管道的形式语义:比较研究
用于安全关键领域的计算机体系结构需要进行最坏情况执行时间分析。性能驱动的微架构的存在可能会触发不希望的时序现象,称为时序异常,并使时序分析复杂化。本文研究了专门设计用于简化最坏情况执行时间分析的管道(也称为可预测管道)。我们提出了四个面向研究的管道和一个工业管道的正式和可执行的模型,以验证他们与时间行为相关的一些主张。通过有界模型检查,我们确实验证了一种称为放大计时异常的计时异常类型的缺失,或者通过确定它们可能发生的情况的先决条件来验证其潜在存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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