一种步长自适应二级cache预取机制  

Stride adaptive prefetching scheme on secondary cache

作　　者：靳强[1] 郭阳[1] 鲁建壮[1] 

机构地区：[1]国防科学技术大学计算机学院,长沙410073

出　　处：《计算机工程与应用》2011年第29期56-59,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.61070036)

摘　　要：随着集成电路制造工艺的快速发展,片上实现大容量的cache成为可能,这从很大程度上降低了cache的失效率,与此同时,大容量的cache发生失效时的开销也更加显著。通过分析cache失效行为,设计了一种新的二级cache步长自适应预取机制,该机制充分利用了二级cache对指令地址不可见的特点,使用失效地址作为索引检查预取表。通过分析测试结果,选择了合适的结构参数,有效提高了cache性能。With the rapid development of VLSI technology,it is possible to implement large cache on chip,which can effeelively reduce the rate of cache miss.However,the large cache also makes the penalty larger than before when cache miss occurs.By analyzing the feature of cache miss, a new stride adaptive prefetching scheme on secondary cache is proposed.And the scheme uses the miss address as index to check prefetching table,because the instruction address is invisible to second- ary cache.By analyzing the testing result, the appropriate structure parameters are selected, which greatly improves the cache performance.

关 键 词：预取 步长自适应 二级CACHE 信心系统机制 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]