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1、東南大學(xué)博士學(xué)位論文CICQ交換機(jī)調(diào)度算法及基于時(shí)限的優(yōu)先級(jí)保證姓名:李勇申請(qǐng)學(xué)位級(jí)別:博士專業(yè):計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師:羅軍舟20070301ABSTRACTABSTRACTWithnOinternalspeeduprequiredandparallel,distributeschedulingatinputandoutputtheClCQ(CombinedInputCrosspointQueuedorbufferedswitch)f
2、abricprovidesuniqueadvantageofdesigninghighperformanceswitchesTheopenproblemsinthisfieldale:lowlevelschedulingalgorithmsusuallyputemphasisonitspracticabilitywhichaimatachievinglittlebufferlowcomplexityandhighthroughputHi
3、gIIlevelschedulingalgorithmusuanyisconsideredtosolvesomeproblemswhichmustsatisfymorerestrictionssuchasdeadlineguaranteedetcMultideadlineschedulingproblemhasbeenprovedtObeNPcompleteifthreeormoledistinctdeadlines(classes)a
4、mpresentinthesetPriorityschedulingproblemwithdeadlineguaranteedhasalsobeenahotanddifficultproblemstudiedinthefieldofRealTimeschedulingHowevertheproposedlowlevelschedulingalgorithmsc柚onlyachieveofIeOrseveralrequirementsMe
5、anwhile,hilghlevelschedulingalgorithmsstillcannotbreaktheperformancelimitofEDFalgorithmsinthereeent30yearsThisdissertationaddressestheaboveopenproblemsInthelowlevelschedulingfieldperformanceanalysisresultsaleproposedunde
6、runiformtrafficandnouuniformtrafficThethreecriterionincludinglittlebufferlowcomplexityandhighthroughputmustbeobeyedinthedesignofschedulingalgorithmMoreoverRRarbiterisbelievedtobethebestchoiceintheoutputschedulingBasedont
7、heperformanceanalysisresults,aschedulingalgorithmisproposedwhichisliRlebuffer0(】)complexityand100%throughputinthelowlevelschedulingThenewalgorithmCallachieve100%throughputundereitheruniformOrnonuniformtraffic,maintaining
8、thesimplicityandeffectivenessofRoundRobinalgorithmandmeanwhileovercomingtheinstabilityoftheRoundRobinalgorithmundernonuniformtrafficInthehighlevelschedulingfieldanovelalgorithmnamedFlowbasedIterativePacketScheduling(FIPS
9、)isproposedTheFIPSalgorithmemployedentirelydifferentschedulingstrategywhencomparingtotheclassicEDFalgorithmThemultideadlinepriorityschedulingNPCproblemisconvertedtosolvethenetflowproblemwithupperandlowerboundthroughconst
10、ructtheflowbasedmodelbetweenthedifferentdeadlinespacketsetsFIPSalgorithmpromotesthelowerprioritypacketstotheidlepositionsinhighprioritypacketssetunderglobalconsiderationsnotrandomlyThecomparisonexperimentswithotherclassi
11、calgorithmssuchasEDFetc,indicatethatFIPShasalowerpacketdroprateandhigherschedulingSuccessratioThenewalgorithminlowlevelschedulingfieldsisindependentwiththetrafficmodelsItCanefficientlyovercometheservicelosscausedbynonuni
12、formtrafficBasedonthehardwaleindustrialbackgroundthatthelimitedbufferCallbeintegratedintocrosspoints,thenewalgorithmisabsolutelyapracticalalgorithmWhiletheCICQswitchemployedthenewalgorithm,theestimatedcostofferportwhichs
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