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A Survey on Cache Management Mechanisms for Real-Time Embedded Systems

机译:实时嵌入式系统的缓存管理机制概述

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Multicore processors are being extensively used by real-time systems, mainly because of their demand for increased computing power. However, multicore processors have shared resources that affect the predictability of real-time systems, which is the key to correctly estimate the worst-case execution time of tasks. One of the main factors for unpredictability in a multicore processor is the cache memory hierarchy. Recently, many research works have proposed different techniques to deal with caches in multicore processors in the context of real-time systems. Nevertheless, a review and categorization of these techniques is still an open topic and would be very useful for the real-time community. In this article, we present a survey of cache management techniques for real-time embedded systems, from the first studies of the field in 1990 up to the latest research published in 2014. We categorize the main research works and provide a detailed comparison in terms of similarities and differences. We also identify key challenges and discuss future research directions.
机译:多核处理器被实时系统广泛使用,主要是因为它们对提高计算能力的需求。但是,多核处理器具有共享资源,这些资源会影响实时系统的可预测性,这是正确估计任务的最坏情况执行时间的关键。多核处理器中不可预测性的主要因素之一是高速缓存存储器层次结构。最近,许多研究工作提出了不同的技术来处理实时系统中的多核处理器中的缓存。尽管如此,对这些技术的回顾和分类仍然是一个开放的话题,对于实时社区将是非常有用的。在本文中,我们对实时嵌入式系统的缓存管理技术进行了概述,从1990年该领域的第一项研究到2014年发表的最新研究。我们对主要研究工作进行了分类,并提供了详细的比较的异同。我们还将确定主要挑战并讨论未来的研究方向。

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