Cache层次中的模式局部性研究  

Study of pattern locality in cache hierarchy

作　　者：汪莹[1] 蒋烈辉[1] 周武明[1] 刘辉[1] 

机构地区：[1]解放军信息工程大学信息工程学院,河南郑州450002

出　　处：《计算机工程与设计》2008年第17期4478-4480,共3页Computer Engineering and Design

摘　　要：对基于记录Cache victim来发现模式局部性的几种方法进行了研究。记录victim决定的一个好处是减少相关信息的复制,并保存victim行当前的位置。典型的Cache可以发现时间局部性和空间局部性。这里要考虑的是如何发现模式的局部性——指的是上一次相邻访问的行在下次仍被一起访问的特性。描述了一些记录模式局部性的新型Cache结构,以及通过几个追踪仿真得到的缺失率和通信传输性能。显示出基于victim统计的模式局部性信息对于提高预取决定的质量帮助很大。Several methods to exploit pattern locality is researched here. An advantage of recording victim decision is the reduced duplication of interrelated information, and save the position of current line. Classic caches can exploit time locality and space locality. The pattern locality--the property that lines accessed in temporal proximity tend to he re-referenced together is considered here. Some new cache structures to record pattern locality is described, along with their miss rate and traffic performance. The results show victim statistics based on pattern locality information are very useful to enhance the quality of prefetch decisions.

关 键 词：模式局部性 牺牲高速缓存 目录扩展 反馈 缺失率 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]