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首页> 外文期刊>Journal of Parallel and Distributed Computing >ReD: A reuse detector for content selection in exclusive shared last-level caches
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ReD: A reuse detector for content selection in exclusive shared last-level caches

机译：ReD：一种复用检测器，用于排他共享的最后一级缓存中的内容选择

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摘要

The reference stream reaching a chip multiprocessor Shared Last-Level Cache (SLLC) shows poor temporal locality, making conventional cache management policies inefficient. Few proposals address this problem for exclusive caches. In this paper, we propose the Reuse Detector (ReD), a new content selection mechanism for exclusive hierarchies that leverages reuse locality at the SLLC, a property that states that blocks referenced more than once are more likely to be accessed in the near future. Being placed between each L2 private cache and the SLLC, ReD prevents the insertion of blocks without reuse into the SLLC. It is designed to overcome problems affecting similar recent mechanisms (low accuracy, reduced visibility window and detector thrashing). ReD improves performance over other state-of-the-art proposals (CHAR, Reuse Cache and EAF cache). Compared with the baseline system with no content selection, it reduces the SLLC miss rate (MPI) by 10.1% and increases harmonic IPC by 9.5%. (C) 2018 Elsevier Inc. All rights reserved.
机译：到达芯片多处理器共享最后一级缓存（SLLC）的参考流显示出较差的时间局部性，从而使常规的缓存管理策略效率低下。很少有提案针对独占缓存解决此问题。在本文中，我们提出了重用检测器（ReD），这是一种用于排他性层次结构的新内容选择机制，该机制利用SLLC处的重用局部性，该属性指出在不久的将来更有可能访问多次引用的块。 ReD放置在每个L2专用缓存和SLLC之间，可防止插入块而不会在SLLC中重复使用。它旨在克服影响类似最新机制的问题（准确性低，可见度窗口减小和检测器抖动）。与其他最先进的提议（CHAR，重用缓存和EAF缓存）相比，ReD可以提高性能。与没有内容选择的基准系统相比，它可将SLLC的未命中率（MPI）降低10.1％，并将谐波IPC降低9.5％。 （C）2018 Elsevier Inc.保留所有权利。

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