Performance Evaluation of the Time Analysable On-Demand Coherent Cache

Arthur Pyka, M. Rohde, S. Uhrig
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引用次数: 8

Abstract

The usage of caches in multi- and many-core systems for timing critical applications is a challenging issue. Time-predictability shaped up as the essential characteristic of a cache when talking about the suitability for hard real-time systems. Common cache coherence mechanisms corrupt the timing analysability of a cache memory because of unpredictable interferences between the caches. Thus, these mechanisms are unsuitable for hard real-time systems. In this work, we briefly describe the ODC2 together with an extension which increases the cache hit rate. We evaluated the performance of the extended ODC2 by comparing it to analysable uncached accesses to shared data and to the well-known but unpredictable MESI and MOESI coherence techniques.
时间可分析按需一致性缓存的性能评估
在多核和多核系统中使用缓存来计时关键应用程序是一个具有挑战性的问题。在讨论硬实时系统的适用性时,时间可预测性成为缓存的基本特征。由于缓存之间不可预测的干扰,常见的缓存一致性机制破坏了缓存存储器的时序可分析性。因此,这些机制不适用于硬实时系统。在本文中,我们将简要介绍ODC2以及一个可以提高缓存命中率的扩展。我们通过将扩展ODC2与共享数据的可分析非缓存访问以及众所周知但不可预测的MESI和MOESI相干技术进行比较,评估了扩展ODC2的性能。
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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