多级缓存模式下的数据块替换优化算法
兰丽
【期刊名称】《计算机工程》 【年(卷),期】2013(039)004
【摘要】Most processor adopts the inclusive cache hierarchy,which requires that the contents of the upper level cache are resident in last level cache.In-depth tests show that the Last-level Cache(LLC) block replacement algorithm has great performance impact on memory system performance.This paper proposes a new LLC cache replacement algorithm,called PLI,to select the best Least Recently Used(LRU) replacement block.Simulation results show that PLI has average 7% performance speedup over traditional approach.%多数处理器中采用多级包含的cache存储层次,现有的末级cache块替换算法带来的性能开销较大.针对该问题,提出一种优化的末级cache块替换算法PLI,在选择丢弃块时考虑其在上级cache的访问频率,以较小的代价选出最优的LLC替换块.在时钟精确模拟器上的评测结果表明,该算法较原算法性能平均提升7%. 【总页数】4页(78-81)
【关键词】cache替换算法;LRU算法;PLI算法;多级cache;末级cache;包容cache 【作者】兰丽
【作者单位】兰州交通大学电子与信息工程学院,兰州730070 【正文语种】中文