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1、ISSN1000-9825,CODENRUXUEWE-mail:jos@iscas.ac.cnJournalofSoftware,Vol.19,No.7,July2008,pp.1856−1864http://www.jos.org.cnDOI:10.3724/SP.J.1001.2008.01856Tel/Fax:+86-10-62562563©2008byJournalofSoftware.Allrightsreserved.∗一种公平服务的动态轮询调度算法1+111,2扈红超,伊鹏,郭云飞,李玉峰1
2、(国家数字交换系统工程技术研究中心,河南郑州450002)2(防空兵指挥学院信息控制系,河南郑州450052)AFairServiceandDynamicRoundRobinSchedulingAlgorithm1+111,2HUHong-Chao,YIPeng,GUOYun-Fei,LIYu-Feng1(NationalDigitalSwitchingSystemEngineeringandTechnologicalR&DCenter,Zhengzhou450002,China)2(Department
3、ofInformationandControl,AirDefenseCommandCollege,Zhengzhou450052,China)+Correspondingauthor:E-mail:huhongchao@gmail.comHuHC,YiP,GuoYF,LiYF.Afairserviceanddynamicroundrobinschedulingalgorithm.JournalofSoftware,2008,19(7):1856−1864.http://www.jos.org.cn/100
4、0-9825/19/1856.htmAbstract:Schedulingpoliciesareplayingsignificantrolesinguaranteeingtheperformanceofcoreroutingandswitchingdevices.Thelimitationsincomplexitiesandextensibilitiesofcurrentcombinedinputandcross-pointqueueingswitchingfabric’sschedulingpolici
5、esarefirstanalyzed.Then,basedonthisanalysis,theprinciplefordesigninghighextensibleschedulingpoliciesandtheconceptofvirtualchannelareproposed.Basedontheprincipleandvirtualchannel,itcomesupwithadynamicroundrobinschedulingalgorithm-FDR(fairserviceanddynamicr
6、oundrobin),whichissimple,andofhighefficiencyandfairservice.FDRisbasedonroundrobinmechanism,whosecomplexityisonlyO(1).Itallocatestheschedulingshareforeachvirtualchannelaccordingtoitscurrentstates,thus,FDRhasgooddynamicandreal-timeperformance,anditcanadaptt
7、ounbalancedtrafficloadnetworkenvironment.SimulationresultsunderSPES(switchingperformanceevaluationsystem)showthatFDRexhibitsgooddelay,throughputandanti-burstperformance.Keywords:switchingfabric;schedulingpolicy;bufferedcrossbar;dynamicroundrobin;SPES(swit
8、chingperformanceevaluationsystem)摘要:调度策略是核心路由交换设备性能的重要保证.针对联合输入交叉节点排队(combinedinputandcross-pointqueuing,简称CICQ)交换结构现有调度策略在复杂度或性能方面存在的缺陷,深入探讨了CICQ交换结构调度策略设计的基本准则,并提出了CICQ下虚拟通道的概念.基于基本准则和虚拟通道概念,提出一种简单、高效和公平服务的动态轮询调度策
