随着多核处理器的发展，片上Cache的容量随之增大，其功耗占整个芯片功耗的比率也越来越大。如何减少Cache的功耗，已成为当今Cache设计的一个热点。本文研究了面向低功耗的多核处理器共享Cache的划分技术（LPCP）。文中提出了Cache划分框架，通过在处理器中加入失效率监控器来动态地收集程序的失效率，然后使用面向低功耗的共享Cache划分算法，计算性能损耗阈值范围内的共享Cache划分策略。我们在一个共享L2 Cache的双核处理器系统中，使用多道程序测试集测试了面向低功耗的Cache划分：在性能损耗阈值为1%和3%的情况中，系统的Cache关闭率分别达到了20.8%和36.9%。

As the development of CMPs,the size of a onchip cache increases and it consumes more and more power of the whole system. How to reduce the power of cache has become a focus of many designers of modern caches. This paper investigates a lowpoweroriented runtime mechanism for shared cache partitioning. A shared cache partitioning framework is proposed,and it uses the Miss Rate Monitors to collect the miss rate information of the current applications at runtime. Then the miss rates are inputted to a lowpoweroriented cache partitioning model to get the partitioning solution within the performance degradation threshold (PDT). Our evaluation,on top of a two core CMP processor with a shared L2 cache,with 21 multiprogram workloads,shows that when PDT is 1% and 3%,the rates of L2 cache shutdown will be up to nearly 20.8% and 36.9% respectively.