集成电路与嵌入式系统2025，Vol.25Issue(8)：81-90,10.DOI:10.20193/j.ices2097-4191.2025.0044
使用多播自适应路由加速缓存一致性片上网络的监听及监听响应过程
Accelerating the snooping & snooping response process of cache-coherent network-on-chip with multicast adaptive routing
胡东伟 1巴晓辉 2刘耿亭 3王力男 1雷岳俊4
作者信息
- 1. 中国电子科技集团公司第五十四研究所,石家庄 050080
- 2. 北京交通大学电子信息工程学院,北京 100044
- 3. 曼彻斯特大学计算机系,曼彻斯特M13 9PL
- 4. 中央民族大学信息工程学院,北京 100081
- 折叠
摘要
Abstract
In Cache-Coherent Network-on-Chip(NoC)of many-core CPU,the snooping and snooping response Process(SNP Process)incurs long latency.To address this,two techniques:multicast routing and adaptive routing are proposed in this paper.According to the requirements of these two techniques,the NoC packet formats for Snooping Request Channel(SNP REQ Ch)and Snooping Response Channel(SNP RESP Ch)are proposed,and furthermore,the NoC routers of SNP REQ Ch and SNP RESP Ch are VLSI implemented.The implementation results show that the routers for both SNP REQ Ch and SNP RESP Ch are of 85 940.3 μm2 or 103 518.5 μm2,while an 8×8 network occupies 5.57 mm2,which is feasible for large-scale chips.Simulations are employed to compare the latencies of 4 configurations:unicast determined routing,unicast adaptive routing,multicast determined routing,and multicast adaptive routing.The simulation results show that the latency of SNP Process with multicast adaptive routing could be cut by 45％for a single snooping request comparing to that with unicast determined routing,resulting in a much shorter latency than DDR/HBM access,and by 73％for 32 consecutive snooping requests with outstanding technique employed at the Point of Coherency(PoC),which validate the effectiveness of the proposed techniques.关键词
片上网络/缓存一致性/自适应路由/多播路由Key words
network-on-chip/cache coherency/adaptive routing/multicast routing分类
信息技术与安全科学引用本文复制引用
胡东伟,巴晓辉,刘耿亭,王力男,雷岳俊..使用多播自适应路由加速缓存一致性片上网络的监听及监听响应过程[J].集成电路与嵌入式系统,2025,25(8):81-90,10.
