Collaboration diagram for SDFstateSpaceBufferAnalysisNingGao::TransitionSystem:

Classes
class	State
Public Types
typedef list< State >	States
typedef States::iterator	StatesIter
Public Member Functions
	TransitionSystem (TimedSDFgraph *gr)
	~TransitionSystem ()
TDtime	execSDFgraph (const TBufSize sp, bool dep, vector< SDFtime > &startTime)
Private Member Functions
bool	storeState (State &s, StatesIter &pos)
void	clearStoredStates ()
void	dfsVisitDependencies (uint a, int color, int pi, bool *abstractDepGraph, bool dep)
void	findStorageDependencies (bool *abstractDepGraph, bool dep)
void	findCausalDependencies (SDFactor a, bool *abstractDepGraph)
void	analyzePeriodicPhase (const TBufSize sp, bool dep)
void	analyzeDeadlock (const TBufSize sp, bool dep)
TDtime	computeThroughput (const StatesIter cycleIter)
bool	releaseStorageSpaceSharedOutputBuffer (SDFchannel *c)
bool	actorReadyToFire (SDFactor *a)
void	startActorFiring (TimedSDFactor *a)
bool	actorReadyToEnd (SDFactor *a)
void	endActorFiring (SDFactor *a)
SDFtime	clockStep ()
void	initOutputActor ()
Private Attributes
TimedSDFgraph *	g
SDFactor *	outputActor
TCnt	outputActorRepCnt
State	currentState
State	previousState
States	storedStates

Member Typedef Documentation

typedef list<State> SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::States

typedef States::iterator SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::StatesIter

Constructor & Destructor Documentation

SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::TransitionSystem ( TimedSDFgraph * gr ) [inline]

References g, and initOutputActor().

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SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::~TransitionSystem ( ) [inline]

Member Function Documentation

bool SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::actorReadyToEnd ( SDFactor * a ) [private]

actorReadyToEnd () The function returns true when the actor is ready to end its firing. Else the function returns false.

References SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::actClk, currentState, and SDFcomponent::getId().

Referenced by analyzePeriodicPhase(), and execSDFgraph().

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bool SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::actorReadyToFire ( SDFactor * a ) [private]

actorReadyToFire () The function returns true when the actor is ready to fire in state s. Else it returns false.

References c, CH_SPACE, CH_TOKENS, SDFport::getChannel(), SDFcomponent::getId(), SDFport::getRate(), SDFchannel::getSrcActor(), SDFport::getType(), SDFactor::portsBegin(), and SDFactor::portsEnd().

Referenced by analyzePeriodicPhase(), and execSDFgraph().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::analyzeDeadlock	(	const TBufSize *	sp,
		bool *	dep
	)			`[private]`

analyzeDeadlock () Analyze the deadlock in the schedule.

References c, CH_SPACE, CH_TOKENS, SDFgraph::channelsBegin(), SDFgraph::channelsEnd(), findStorageDependencies(), g, SDFchannel::getDstActor(), SDFchannel::getDstPort(), SDFcomponent::getId(), SDFport::getRate(), SDFchannel::getSrcActor(), SDFchannel::getSrcPort(), and SDFgraph::nrActors().

Referenced by execSDFgraph().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::analyzePeriodicPhase	(	const TBufSize *	sp,
		bool *	dep
	)			`[private]`

analyzePeriodicPhase () Analyze the periodic phase of the schedule to find all blocked channels. This is done using the abstract dependency graph.

References a, actorReadyToEnd(), actorReadyToFire(), SDFgraph::actorsBegin(), SDFgraph::actorsEnd(), SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::ch, clockStep(), currentState, endActorFiring(), findCausalDependencies(), findStorageDependencies(), g, SDFcomponent::getId(), SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::glbClk, SDFgraph::nrActors(), SDFgraph::nrChannels(), outputActor, outputActorRepCnt, previousState, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::sp, and startActorFiring().

Referenced by execSDFgraph().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::clearStoredStates ( ) [inline, private]

References storedStates.

Referenced by execSDFgraph().

SDFtime SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::clockStep ( ) [private]

clockStep () The function progresses time till the first end of firing transition becomes enabled. The time step is returned. In case of deadlock, the time step is equal to UINT_MAX.

References a, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::actClk, currentState, g, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::glbClk, and SDFgraph::nrActors().

Referenced by analyzePeriodicPhase(), and execSDFgraph().

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TDtime SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::computeThroughput ( const StatesIter cycleIter ) [private]

computeThroughput () The function calculates the throughput of the states on the cycle. Its value is equal to the average number of firings of an actor per time unit.

References SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::glbClk, and storedStates.

Referenced by execSDFgraph().

void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::dfsVisitDependencies	(	uint	a,
		int *	color,
		int *	pi,
		bool **	abstractDepGraph,
		bool *	dep
	)			`[private]`

dfsVisitDependencies () The function performs a DFS on the abstract dependency graph from a node a to find all cycles of which a is part. Channels on a cycle are when needed marked to have a storage dependency.

References c, SDFgraph::channelsBegin(), SDFgraph::channelsEnd(), g, SDFchannel::getDstActor(), SDFcomponent::getId(), SDFchannel::getSrcActor(), and SDFgraph::nrActors().

Referenced by findStorageDependencies().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::endActorFiring ( SDFactor * a ) [private]

endActorFiring () Produce tokens on all output channels and remove the actor firing from the list of active firings.

References SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::actClk, c, currentState, SDFport::getChannel(), SDFcomponent::getId(), SDFport::getRate(), SDFport::getType(), SDFactor::portsBegin(), SDFactor::portsEnd(), and PRODUCE.

Referenced by analyzePeriodicPhase(), and execSDFgraph().

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TDtime SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::execSDFgraph	(	const TBufSize *	sp,
		bool *	dep,
		vector< SDFtime > &	startTime
	)

execSDFgraph() Execute the SDF graph till a deadlock is found or a recurrent state. The throughput is returned.

References a, actorReadyToEnd(), actorReadyToFire(), SDFgraph::actorsBegin(), SDFgraph::actorsEnd(), analyzeDeadlock(), analyzePeriodicPhase(), c, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::ch, CH, SDFgraph::channelsBegin(), SDFgraph::channelsEnd(), SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::clear(), clearStoredStates(), clockStep(), computeThroughput(), currentState, endActorFiring(), g, SDFcomponent::getId(), SDFchannel::getInitialTokens(), SDFchannel::getSrcActor(), SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::glbClk, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::init(), SDFgraph::nrActors(), SDFgraph::nrChannels(), outputActor, outputActorRepCnt, previousState, SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::sp, SP, startActorFiring(), and storeState().

Referenced by SDFstateSpaceBufferAnalysisNingGao::execStorageDistribution().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::findCausalDependencies	(	SDFactor *	a,
		bool **	abstractDepGraph
	)			`[private]`

findCausalDependencies () The function tracks all causal dependencies in the actor firing of actor a. Any causal dependency that is found is added to the abstract dependency graph.

References c, CH_SPACE_PREV, CH_TOKENS_PREV, SDFport::getChannel(), SDFchannel::getDstActor(), SDFcomponent::getId(), SDFport::getRate(), SDFchannel::getSrcActor(), SDFport::getType(), SDFactor::portsBegin(), and SDFactor::portsEnd().

Referenced by analyzePeriodicPhase().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::findStorageDependencies	(	bool **	abstractDepGraph,
		bool *	dep
	)			`[private]`

findStorageDependencies () The function find all cycles in the abstract dependency graph. Any channel modeling storage space which is part of a cycle is marked to have a storage dependency.

References c, color, dfsVisitDependencies(), g, SDFgraph::nrActors(), SDFgraph::nrChannels(), and pi.

Referenced by analyzeDeadlock(), and analyzePeriodicPhase().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::initOutputActor ( ) [private]

initOutputActor () The function selects an actor to be used as output actor in the state transition system.

References a, SDFgraph::actorsBegin(), SDFgraph::actorsEnd(), FSMSADF::computeRepetitionVector(), g, SDFcomponent::getId(), outputActor, and outputActorRepCnt.

Referenced by TransitionSystem().

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bool SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::releaseStorageSpaceSharedOutputBuffer ( SDFchannel * c ) [private]

releaseStorageSpaceSharedOutputBuffer () The function checks whether space must be produced on the shared output buffer. This is the case when the channel 'c' is the last channel to consume the token from the shared output buffer connected to the source of the channel. This condition is met when all outgoing channels of the source actor of the channel 'c' contain less tokens then the channel 'c'.

References a, CH, SDFport::getChannel(), SDFcomponent::getId(), SDFchannel::getSrcActor(), SDFport::getType(), SDFactor::portsBegin(), and SDFactor::portsEnd().

Referenced by startActorFiring().

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void SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::startActorFiring ( TimedSDFactor * a ) [private]

startActorFiring () Start the actor firing. Remove tokens from all input channels and add the actor firing to the list of active actor firings and advance sequence position.

References SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::State::actClk, c, CONSUME, CONSUME_SP, currentState, SDFport::getChannel(), TimedSDFactor::getExecutionTime(), SDFcomponent::getId(), SDFport::getRate(), SDFchannel::getSrcActor(), SDFport::getType(), SDFactor::portsBegin(), SDFactor::portsEnd(), PRODUCE_SP, and releaseStorageSpaceSharedOutputBuffer().

Referenced by analyzePeriodicPhase(), and execSDFgraph().

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bool SDFstateSpaceBufferAnalysisNingGao::TransitionSystem::storeState	(	State &	s,
		StatesIter &	pos
	)			`[private]`

storeState () The function stores the state s on whenever s is not already in the list of storedStates. When s is stored, the function returns true. When the state s is already in the list, the state s is not stored. The function returns false. The function always sets the pos variable to the position where the state s is in the list.

References storedStates.

Referenced by execSDFgraph().