WPP-L2:多核处理器中共享Cache低功耗路预测算法  

WPP-L2:A Way-predicting Algorithm for Shared L2 Cache of Multi-core Processors

作　　者：方娟[1] 郭媚[1] 杜文娟[1] 

机构地区：[1]北京工业大学计算机学院,北京100124

出　　处：《计算机科学》2013年第8期34-37,42,共5页Computer Science

基　　金：国家自然科学基金项目(61202076);北京市教委科技计划面上项目(KM201210005022);北京市中青年骨干人才培养项目(007000543112512)资助

摘　　要：针对片上多核处理器下的二级共享Cache的能耗问题提出了基于Cache划分的路预测Cache结构WPP-L2,该结构首先对共享Cache进行公平性划分,然后采用路预测的方法降低了预测命中和失效时各自的能耗开销。实验表明,在基本保持多核处理器性能的同时,8核处理器系统下WPP-L2Cache比基于路预测的L2Cache的能耗延迟乘积EDP(Energy Delay Product)平均下降24.7%,比传统的L2Cache的EDP平均下降66.1%,极大地降低了L2Cache功耗。This paper proposed a way-predicting L2 cache mechanism based on cache partitioning for the problem of multi-core processors power,which is WPP-L2. WPP-L2 partitions the shared cache for fairness, and then uses cache way-predicting techniques to reduce the energy consumption when the prediction hits and misses. The results turn out, WPP-L2 cache could reduce EDP（Energy Delay Product）by 24. 7 % compared with the way-predicting L2cache, and re- duce EDP by 66.1% compared with the traditional L2cache under the eight-core processors, which lowers the energy consumption of L2 Cache and maintains the performance at the same time.

关 键 词：多核处理器 低功耗 路预测 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]