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arXiv 0710.4703cs.AR
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一种降低专用集成处理器Cache功耗的路径记忆技术

A Way Memoization Technique for Reducing Power Consumption of Caches in Application Specific Integrated Processors

Tohru Ishihara, Farzan Fallah

摘要:

本文提出了一种技术,消除冗余的缓存标签和缓存的方式访问,以减少功耗。其基本思想是在内存地址缓冲区(MAB)中保留少量最近使用(MRU)地址,并在MAB命中时省略冗余的标记和路访问。由于该方法仅在MAB中保持标签和集合索引值,因此即使对于具有大量条目的MAB,能量和面积开销也相对较小。此外,该方法不会牺牲性能。换句话说,周期时间和执行周期的数量都不会增加。所提出的技术已被应用到富士通VLIW处理器(FR-V)和它的节能已估计使用NanoSim。对32 kB两路组相联Cache的实验表明,I-Cache和D-Cache的功耗分别降低了40%和50%。

英文摘要:

This paper presents a technique for eliminating redundant cache-tag and cache-way accesses to reduce power consumption. The basic idea is to keep a small number of Most Recently Used (MRU) addresses in a Memory Address Buffer (MAB) and to omit redundant tag and way accesses when there is a MAB-hit. Since the approach keeps only tag and set-index values in the MAB, the energy and area overheads are relatively small even for a MAB with a large number of entries. Furthermore, the approach does not sacrifice the performance. In other words, neither the cycle time nor the number of executed cycles increases. The proposed technique has been applied to Fujitsu VLIW processor (FR-V) and its power saving has been estimated using NanoSim. Experiments for 32kB 2-way set associative caches show the power consumption of I-cache and D-cache can be reduced by 40% and 50%, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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