WPP-L2:多核处理器中共享Cache低功耗路预测算法

摘要

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 reduce 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.%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-L2 Cache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L2 Cache的EDP平均下降66.1％,极大地降低了L2Cache功耗.