{"title":"Simulated Performance Evaluation of a 6D Mesh/iBT Interconnect","authors":"Rui Feng, Peng Zhang, Yuefan Deng","doi":"10.1109/SNPD.2012.19","DOIUrl":null,"url":null,"abstract":"A new 6D mesh/torus (Tofu) interconnect is implemented in the K Computer for achieving a performance of more than 10 petaflops. As expected, among its many interesting properties, such interconnect has large variations of latencies for communications within a node-group (intra-node-group) or between them (inter-node-group). Inspired by their works while recognizing the superior features of the recently published interlaced bypass torus (iBT) network that can help reduce such variations, we propose a new 6D mesh/iBT interconnect by replacing the 3D torus of Tofu by a 3D iBT. Our new interconnect suppresses the latencies for inter-node-group communications to dramatically improve the overall performance for the entire network. Adapting an industrial standard network simulator NS-3, we study different communication patterns of the added iBT networks under different bypass schemes. We find that the simulated average latencies of our network are 40% less than those of the Tofu interconnect for all tested patterns.","PeriodicalId":387936,"journal":{"name":"2012 13th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2012-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 13th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SNPD.2012.19","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
A new 6D mesh/torus (Tofu) interconnect is implemented in the K Computer for achieving a performance of more than 10 petaflops. As expected, among its many interesting properties, such interconnect has large variations of latencies for communications within a node-group (intra-node-group) or between them (inter-node-group). Inspired by their works while recognizing the superior features of the recently published interlaced bypass torus (iBT) network that can help reduce such variations, we propose a new 6D mesh/iBT interconnect by replacing the 3D torus of Tofu by a 3D iBT. Our new interconnect suppresses the latencies for inter-node-group communications to dramatically improve the overall performance for the entire network. Adapting an industrial standard network simulator NS-3, we study different communication patterns of the added iBT networks under different bypass schemes. We find that the simulated average latencies of our network are 40% less than those of the Tofu interconnect for all tested patterns.