Scratchpad memories vs locked caches in hard real-time systems: a quantitative comparison

I. Puaut, Christophe Pais
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引用次数: 146

Abstract

We propose in this paper an algorithm for off-line selection of the contents of on-chip memories. The algorithm supports two types of on-chip memories, namely locked caches and scratchpad memories. The contents of on-chip memory, although selected off-line, is changed at run-time, for the sake of scalability with respect to task size. Experimental results show that the algorithm yields to good ratios of on-chip memory accesses on the worst-case execution path, with a tolerable reload overhead, for both types of on-chip memories. Furthermore, we highlight the circumstances under which one type of on-chip memory is more appropriate than the other depending of architectural parameters (cache block size) and application characteristics (basic block size)
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硬实时系统中的刮板存储器与锁定缓存:定量比较
本文提出了一种离线选择片上存储器内容的算法。该算法支持两种类型的片上存储器,即锁定缓存和刮板存储器。片上内存的内容,虽然是离线选择的,但在运行时更改,这是为了在任务大小方面具有可伸缩性。实验结果表明,对于两种类型的片上存储器,该算法在最坏的执行路径上产生良好的片上存储器访问比率,并且具有可容忍的重新加载开销。此外,我们还强调了根据体系结构参数(缓存块大小)和应用程序特征(基本块大小),一种类型的片上存储器比另一种更合适的情况。
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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