计算机工程2017，Vol.43Issue(10)：17-22,30,7.DOI:10.3969/j.issn.1000-3428.2017.10.004
基于访存局部性的一致性请求广播范围预测
Prediction of Coherence Request Broadcast Range Based on Access Locality
摘要
Abstract
Snoopy protocols and directory protocols are widely used in modern server systems,but the former need large bandwidth,directory protocols have long latency,so they are not suitable for domestic server processor where bandwidth is relatively small and latency is relatively long.This paper based on a hybrid coherence protocol which uses Token protocol inter chip and directory protocol intra chip,and uses the access locality to predict the destination of the request.Experimental results show that the HP-SRW protocol has 8.9％ better performance than the two-level directory protocol,and 3.1％ less demand of bandwidth.It has 30.6％ less demand of bandwidth than Hybrid Protocol(HP).Compared with the Token protocol,the HP-SRW significantly reduces the demand of inter-chip bandwidth by 66.5％ at the cost of 4.7％ performance.关键词
片间直连/Cache一致性/Token协议/目录协议/混合协议Key words
direct connection among chips/Cache coherence/Token protocol/directory protocol/Hybrid Protocol (HP)分类
信息技术与安全科学引用本文复制引用
王云霏,李媛,王飙..基于访存局部性的一致性请求广播范围预测[J].计算机工程,2017,43(10):17-22,30,7.基金项目
“核高基”重大专项“超级计算机处理器研发”(2013ZX0102-8001-001-001). （2013ZX0102-8001-001-001）
