ch10 DEADLOCKS.ppt
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ch10 DEADLOCKS.ppt

ch10DEADLOCKS.ppt

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CHAPTER8:DEADLOCKSSYSTEMMODELSystemModel:BridgecrossingexampleSystemModel:ThegeneralmodelDEADLOCKCHARACTERIZATIONDeadlockCharacterization:Resource-allocationgraphDeadlockCharacterization:Resource-allocationgraphDeadlockCharacterization:ExampleofaresourceallocationgraphDeadlockCharacterization:ResourceallocationgraphwithadeadlockDeadlockCharacterization:ResourceallocationgraphwithacyclebutnodeadlockDeadlockCharacterization:BasicfactsMETHODSFORHANDLINGDEADLOCKSDeadlockPreventionDeadlockPreventionDEADLOCKAVOIDANCEDeadlockAvoidanceDeadlockAvoidance:SafestateDeadlockAvoidance:BasicfactsDeadlockAvoidance:Safe,unsafe,deadlockstateDeadlockAvoidance:Resource-allocationgraphalgorithmDeadlockAvoidance:Resource-allocationgraphfordeadlockavoidanceDeadlockAvoidance:Unsafestateinresource-allocationgraphDeadlockAvoidance:Banker’salgorithmDeadlockAvoidance:Datastructuresforthebanker’salgorithmDeadlockAvoidance:SafetyalgorithmDeadlockAvoidance:Resource-requestalgorithmforprocessPiDeadlockAvoidance:Exampleofbanker’salgorithmDeadlockAvoidance:Example(Cont.)DeadlockAvoidance:ExampleP1Request(1,0,2)(Cont.)DEADLOCKDETECTIONDeadlockDetection:SingleInstanceofEachResourceTypeDeadlockDetection:Resource-AllocationGraphandWait-forGraphDeadlockDetection:SeveralInstancesofaResourceTypeDeadlockDetection:DetectionAlgorithmDetectionAlgorithm:AmexampleDetectionAlgorithm:Amexample(Cont.)Detection-Algorithm:UsageDEADLOCKRECOVERYDeadlockRecovery:ProcessTerminationDeadlockRecovery:ResourcePreemptionCombinedApproachtoDeadlockHandlingHomework