一个由编译器控制的Cache替换策略  

A Compiler-assisted Cache Replacement Policy

作　　者：杜红燕[1] 田兴彦[2] 田新华[2] 

机构地区：[1]长沙大学计算机科学与工程系,长沙410003 [2]国防科学技术大学计算机学院,长沙410073

出　　处：《计算机工程》2006年第8期102-104,共3页Computer Engineering

基　　金：国家"863"计划基金资助项目"高性能微处理器优化编译器研究"(2002AA1Z2105)

摘　　要：由于Cache污染问题,传统的仅由硬件控制的Cache替换策略不能得到令人满意的Cache利用率。为解决该问题,EPIC引入了Cache提示以辅助控制Cache替换。文章提出了一个由编译器辅助控制的Cache替换策略:最优Cache划分(OCP)。OCP Cache替换策略简化了Cache行为和Cache失效分析方法。实验结果表明,OCP Cache替换策略能有效地降低Cache失效率。Recent research results show that conventional hardware-only cache replacement policies result in unsatisfactory cache utilization because of cache pollution. To overcome this problem, cache hints are introduced to assist cache replacement. Cache hints are used to specify the cache level at which the data is stored after accessing it. This paper presents a compiler-assisted cache replacement policy, optimum cache partition （OCP）, which can be carried out through cache hints and LRU replacement policy. The OCP replacement policy results in plain cache behaviors, and makes cache misses analyzing and optimizing easily and efficiently. OCP replacement policy has been implemented in the compiler test-bed and evaluated on a set of scientific computing benchmarks. Initial results show that the approach is effective on reducing the cache miss rate.

关 键 词：Cache提示 Cache行为分析 编译优化 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]