tweaker-t1-training-20100928

“Tweaker–T1”TimingECOTrainingSlidesDoradoDesignAutomation2010.09TrainingAgenda†Tweakerbasicconcept/flow†GeneratePTreportforT1†Tweakerscriptsintroduction†pre-EcoSTA†Interactivetimingfixanddebug†OpendiscussionAgenda†Tweakerbasicconcept/flow†GeneratePTreportforT1†Tweakerscriptsintroduction†pre-EcoSTA†Interactivetimingfixanddebug†OpendiscussionAvailableResource$TWEAKER_INSTALL_DIR/etc/template/README$TWEAKER_INSTALL_DIR/etc/scripts/*InTweakercommandwindow:Type“help”toseeallcommandsortype“helppattern*”toseecommandsmatchthepattern.Type“mancommand”toseethedetaildescriptions.Type“printvar*”toseeallvariablesortype“printvarpattern*”toseevariablesmatchthepattern.BothTweakerbuilt-inanduser-definedvariableswillbelisted.Type“manvariable”toseethedetaildecriptions.TweakerProductLineNetlistViewPhysicalViewSchematicViewSlackViewBaselinePlatformFeatures„Aninterfaceforfront-enduserstoaccessback-enddata„Numerousinteractivetimingfixingfunctions„Editingisallowedinallviews„Timingwillbeupdatedassoonaninstanceischangedormoved„Tclcommandsenablerepeatablebatcheditinganddatabaseaccess„Powerdomainaware(CPF/UPF)Tweaker-LitebaselineplatformTweakerF1TweakerT1TweakerM1TweakerP1WholeTweakerfamilyaretightlyintegratedonthesameplatformTweakerSIWhatisECO?Today’s“ECO”ismorethandesignchangeToday’s“ECO”is…“AllTheINCREMENTALJOBs”intheECOPhaseTightlyIntegratedECOToolSuiteFunctionalECO=TweakerF1IntegratedwithEquivalenceCheckingengine,timer,placer,andECOsynthesisengine.Thepatent-pendingalgorithmguaranteeminimumamountofECOlogic.MetalECO=TweakerM1ECOSynthesisandsparecellsmanipulationforpost-siliconECO.Anadd-onofF1.TimingECO=TweakerT1TheuniqueMMMC(multi-mode,multi-corner)datastructureandthe“ECODomain”conceptenable40+scenariosofsignoffdatatobeprocessedsimultaneously.PowerECO=TweakerP1Hvt/Lvtcellswappingforfurthersaving15-25%leakagepowerafterP&R.Anadd-onofT1.SIPrevention=TweakerSIPre-routeSI-Preventionbycellswappingandbufferinsertion.Anadd-onofT1.WhatarethebenefitsofusingTweakerT1?1.MultiModeMultiCornersupportedforonelicenseonly.„EachTweakerruncanhandlenumerousscenarioscomposedofcombinationsofdifferentLibcorners,RCcorners,andmodes.„Allscenarioscanbereadinatonetimeandhenceonly1licenseisneeded.„Costisminimumandresultiswithmaximumsatisfaction.WhatarethebenefitsofusingTweakerT1?2.LightweightECOpathdomainforlessdataloading&instanttimingupdate„TweakerbuildsitsECOdomainbasedontheslackreportsoutputfromsign-offtoolslikeSynopsys’sPrimeTimeorIncentia’sTimeCraft.„Nowholechiptiminggraphisneededforlessloadingofthetool.„Theinputslewandoutputloadingattheboundaryoftheecodomainarewellmaintained.ECOdomainSlewandloadingatboundaryarewellmaintained.WhatarethebenefitsofusingTweakerT1?3.ReliableTimingpredictionbasedonaccurateRCestimation.„Whenfixingthetimingissues,newlygeneratednetsormismatchednetsinsideECOdomainwouldbere-estimatedbasedonthepre-charaterizedRCtablewhichconsistsofunitresistanceandunitcapacitance.„TheRCestimationflowisasfollowinggraph.Bydoingthiswecouldprovidereliabletimingpredictioninstantlyforusertojudgethedesignalteration.WhatarethebenefitsofusingTweakerT1?4.HoldtimeFixingwithsetup“free”guaranteebywatchingTWF.„ByusingTimingwindowfilesofeverypin’sfastandslowcornerslackinformation.„TweakerwouldavoidinsertingbuffersontightsetupmarginpinsbywatchingandupdatingTWFinstantly.„ThebasicideaofTWFisasfollowinggraph.WhatarethebenefitsofusingTweakerT1?5.FixHoldtimewithminimumnumberofbufferinsertion.„Tweakerwouldsearchthecommonpointsfordifferentviolationpathsorgroupthesinkpinsforhighfanoutdrivertosavetheinsertedbuffersasmanyaspossible.„otherstrategiessuchasadddummyloadorcellswappingarereadyforusertoextendfixingflexibility.Theseideasaredepictedasfollowinggraph.DummyLoadHook-up’sStep2VTSwappingandCellSizingStep1BufferInsertionatCommonPointsStep4SetupPathHFIwithSmartGroupingStep3HoldPathHoldPathHoldPathWhatarethebenefitsofusingTweakerT1?6.SetupviolationfreeforTransitionfixorSetupfix„TweakercouldreadTWFforfixingsetuptimeorfixingtransitiontimetoensuresetuppathswouldnotbeaffectedandkeptintact.„Forexample,†wheninsertingbufferatpinswithtransitionbeyondconstraint,TWFwouldbewatchedandcheckedtoseeifsetupmarginisbigenough.WhatarethebenefitsofusingTweakerT1?7.SupportMultivoltagespecificationunderthesamecorner„Projectsmayapplydifferentvoltagesonspecifiedmoduleswithinthesamepowerdomain.Hencetoreflectthetimingdifferencecausedbydifferentvoltage.„Tweakercouldhonormulti-voltagesettingswhenreadinglibrariesandestablishingtimingscenarios.Differentvoltagesupplyfortheredinstancesunderspecifiedmodule.WhatarethebenefitsofusingTweakerT1?8.GreatphysicalperformanceiswhatTweakercoulddelivertoyou!„Bycombingcorrectbufferplacement&accurateRCestimation,Tweakercoulddeliverreliabletimingpredictionandtrustful“setupfreeholdtimefix”resultWhatarethebenefitsofusingTweakerT1?9.SafeECOstrategyforfixingtimingissues.„TweakerT1providesaseriesofadjustablesettingstofacilitatetheSafeECO.„Aftercostfunctioncalculationruledbyuser’ssettingwewouldclassifyifthepinsarewithinsafetymarginornot.„Tweakerwouldfixviolationsonsaferpins