文章基本信息

标题：Mitigating Software-Instrumentation Cache Effects in Measurement-Based Timing Analysis
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作者：Enrique D{\'i}az ; Jaume Abella ; Enrico Mezzetti 等
期刊名称：OASIcs : OpenAccess Series in Informatics
电子版ISSN：2190-6807
出版年度：2016
卷号：55
页码：1-11
DOI：10.4230/OASIcs.WCET.2016.1
出版社：Schloss Dagstuhl -- Leibniz-Zentrum fuer Informatik
摘要：Measurement-based timing analysis (MBTA) is often used to determine the timing behaviour of software programs embedded in safety-aware real-time systems deployed in various industrial domains including automotive and railway. MBTA methods rely on some form of instrumentation, either at hardware or software level, of the target program or fragments thereof to collect execution-time measurement data. A known drawback of software-level instrumentation is that instrumentation itself does affect the timing and functional behaviour of a program, resulting in the so-called probe effect: leaving the instrumentation code in the final executable can negatively affect average performance and could not be even admissible under stringent industrial qualification and certification standards; removing it before operation jeopardizes the results of timing analysis as the WCET estimates on the instrumented version of the program cannot be valid any more due, for example, to the timing effects incurred by different cache alignments. In this paper, we present a novel approach to mitigate the impact of instrumentation code on cache behaviour by reducing the instrumentation overhead while at the same time preserving and consolidating the results of timing analysis.
关键词：WCET; Measurements; Instrumentation overhead