摘要
分布式共享存储（ＤＳＭ）使得在分布式存储机器上，对显式消息传递编程的需要得到减轻．为降低存储访问延迟，ＤＳＭ系统将数据复制多个拷贝．文中考查了几种用于控制因伪共享问题造成的存储抖动的方法，提出了一种新的存储一致性协议：写者拥有协议，它在运行时检测并消除伪共享．迭代运算中，由于数据在每次迭代中被相似地存取，写者拥有协议只要消除一次伪共享，所以额外开销非常小．实验数据表明，写者拥有协议通常情况下优于已有的协议．
Distributed shared memory (DSM) alleviates the need to program message passing explicitly on a distributed memory machine. In order to reduce memory latency, DSM replicates copies of data. Here examined are some current approaches to controlling thrashing caused by false sharing in a DSM. A novel memory consistency protocol (writer owned protocol) is introduced, which detects and eliminates false sharing at run time. In iterative computations where the data is accessed similarly at every iteration, the writer owned protocol can have tremendous benefits because the overhead of eliminating false sharing is incurred only once. Performance results show that the writer owned protocol is often better than the existing approaches.
出处
《计算机研究与发展》
EI
CSCD
北大核心
1999年第3期291-296,共6页
Journal of Computer Research and Development
基金
国家自然科学基金
"八六三"高技术计划
关键词
分布式共享存储
伪共享
DSM系统
存储系统
distributed shared memory(DSM), memory consistency protocol, false sharing
