#include <looppoint_analysis.hh>

Inheritance diagram for gem5::LooppointAnalysisManager:

Public Member Functions
	LooppointAnalysisManager (const LooppointAnalysisManagerParams &params)

void	countBackwardBranch (const Addr pc)
	This function is called by the LooppointAnalysis probe listener when it finds a valid backward branch that can be used as a marker.

void	updateGlobalBBV (const Addr pc)
	This function is called by the LooppointAnalysis probe listener when it reaches the branch instruction for a valid basic block.

bool	ifBackwardBranch (const Addr pc) const

bool	ifValidNotControl (const Addr pc) const

bool	ifValidControl (const Addr pc) const

bool	ifEncountered (const Addr pc) const

void	updateValidNotControl (const Addr pc)

void	updateValidControl (const Addr pc)

void	updateEncountered (const Addr pc)

void	updateBBInstMap (Addr pc, uint64_t inst_ount)

std::unordered_map< Addr, uint64_t >	getBBInstMap () const

std::unordered_map< Addr, uint64_t >	getGlobalBBV () const

void	clearGlobalBBV ()

uint64_t	getGlobalInstCounter () const

void	clearGlobalInstCounter ()

void	incrementGlobalInstCounter ()

Addr	getMostRecentBackwardBranchPC () const

std::unordered_map< Addr, uint64_t >	getBackwardBranchCounter () const

uint64_t	getMostRecentBackwardBranchCount () const

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

virtual void	init ()
	init() is called after all C++ SimObjects have been created and all ports are connected.

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.

virtual void	regProbePoints ()
	Register probe points for this object.

virtual void	regProbeListeners ()
	Register probe listeners for this object.

ProbeManager *	getProbeManager ()
	Get the probe manager for this object.

virtual Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a port with a given name and index.

virtual void	startup ()
	startup() is the final initialization call before simulation.

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::EventManager
EventQueue *	eventQueue () const

void	schedule (Event &event, Tick when)

void	deschedule (Event &event)

void	reschedule (Event &event, Tick when, bool always=false)

void	schedule (Event *event, Tick when)

void	deschedule (Event *event)

void	reschedule (Event *event, Tick when, bool always=false)

void	wakeupEventQueue (Tick when=(Tick) -1)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers.

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue.

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

Public Member Functions inherited from gem5::Serializable
	Serializable ()

virtual	~Serializable ()

void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

void	unserializeSection (CheckpointIn &cp, const std::string &name)

Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.

virtual void	notifyFork ()
	Notify a child process of a fork.

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

void	addStat (statistics::Info *info)
	Register a stat with this group.

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Private Attributes
std::unordered_map< Addr, uint64_t >	backwardBranchCounter
	This counter is for the valid backward branches that we consider as candidates for marking the execution points.

std::unordered_map< Addr, uint64_t >	globalBBV
	This is the global basic block vector that contains the count of each basic block that is executed.

std::unordered_map< Addr, uint64_t >	bbInstMap
	This map stores the number of instructions in each basic block.

uint64_t	regionLength
	This variable stores the number of instructions that we used to define a region.

uint64_t	globalInstCounter
	This is a counter for the globally executed instructions.

Addr	mostRecentBackwardBranchPC
	This variable stores the Program Counter address of the most recent valid backward branch that we consider as a marker.

std::unordered_set< Addr >	validNotControlPC
	This set stores the Program Counter addresses of the valid not control instructions.

std::unordered_set< Addr >	validControlPC
	This set stores the Program Counter addresses of the valid control instructions.

std::unordered_set< Addr >	encounteredPC
	This set stores the Program Counter addresses of the encountered instructions.

Additional Inherited Members
Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain.

void	signalDrainDone () const
	Signal that an object is drained.

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Detailed Description

Definition at line 148 of file looppoint_analysis.hh.

Constructor & Destructor Documentation

◆ LooppointAnalysisManager()

gem5::LooppointAnalysisManager::LooppointAnalysisManager ( const LooppointAnalysisManagerParams & params )

Definition at line 210 of file looppoint_analysis.cc.

References DPRINTF, and regionLength.

Member Function Documentation

◆ clearGlobalBBV()

void gem5::LooppointAnalysisManager::clearGlobalBBV ( )

inline

Definition at line 294 of file looppoint_analysis.hh.

References DPRINTF, and globalBBV.

◆ clearGlobalInstCounter()

void gem5::LooppointAnalysisManager::clearGlobalInstCounter ( )

inline

Definition at line 307 of file looppoint_analysis.hh.

References DPRINTF, and globalInstCounter.

◆ countBackwardBranch()

void gem5::LooppointAnalysisManager::countBackwardBranch ( const Addr pc )

This function is called by the LooppointAnalysis probe listener when it finds a valid backward branch that can be used as a marker.

Specifically, it increments the backwardBranchCounter for the input PC.

Definition at line 221 of file looppoint_analysis.cc.

References backwardBranchCounter, DPRINTF, gem5::exitSimLoopNow(), globalInstCounter, mostRecentBackwardBranchPC, gem5::MipsISA::pc, and regionLength.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ getBackwardBranchCounter()

std::unordered_map< Addr, uint64_t > gem5::LooppointAnalysisManager::getBackwardBranchCounter ( ) const

inline

Definition at line 327 of file looppoint_analysis.hh.

References backwardBranchCounter.

◆ getBBInstMap()

std::unordered_map< Addr, uint64_t > gem5::LooppointAnalysisManager::getBBInstMap ( ) const

inline

Definition at line 282 of file looppoint_analysis.hh.

References bbInstMap.

◆ getGlobalBBV()

std::unordered_map< Addr, uint64_t > gem5::LooppointAnalysisManager::getGlobalBBV ( ) const

inline

Definition at line 288 of file looppoint_analysis.hh.

References globalBBV.

◆ getGlobalInstCounter()

uint64_t gem5::LooppointAnalysisManager::getGlobalInstCounter ( ) const

inline

Definition at line 301 of file looppoint_analysis.hh.

References globalInstCounter.

◆ getMostRecentBackwardBranchCount()

uint64_t gem5::LooppointAnalysisManager::getMostRecentBackwardBranchCount ( ) const

inline

Definition at line 333 of file looppoint_analysis.hh.

References backwardBranchCounter, and mostRecentBackwardBranchPC.

◆ getMostRecentBackwardBranchPC()

Addr gem5::LooppointAnalysisManager::getMostRecentBackwardBranchPC ( ) const

inline

Definition at line 321 of file looppoint_analysis.hh.

References mostRecentBackwardBranchPC.

◆ ifBackwardBranch()

bool gem5::LooppointAnalysisManager::ifBackwardBranch ( const Addr pc ) const

inline

Definition at line 232 of file looppoint_analysis.hh.

References backwardBranchCounter, and gem5::MipsISA::pc.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ ifEncountered()

bool gem5::LooppointAnalysisManager::ifEncountered ( const Addr pc ) const

inline

Definition at line 250 of file looppoint_analysis.hh.

References encounteredPC, and gem5::MipsISA::pc.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ ifValidControl()

bool gem5::LooppointAnalysisManager::ifValidControl ( const Addr pc ) const

inline

Definition at line 244 of file looppoint_analysis.hh.

References gem5::MipsISA::pc, and validControlPC.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ ifValidNotControl()

bool gem5::LooppointAnalysisManager::ifValidNotControl ( const Addr pc ) const

inline

Definition at line 238 of file looppoint_analysis.hh.

References gem5::MipsISA::pc, and validNotControlPC.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ incrementGlobalInstCounter()

void gem5::LooppointAnalysisManager::incrementGlobalInstCounter ( )

inline

Definition at line 315 of file looppoint_analysis.hh.

References globalInstCounter.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ updateBBInstMap()

void gem5::LooppointAnalysisManager::updateBBInstMap	(	Addr	pc,
		uint64_t	inst_ount
	)

inline

Definition at line 274 of file looppoint_analysis.hh.

References bbInstMap, and gem5::MipsISA::pc.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ updateEncountered()

void gem5::LooppointAnalysisManager::updateEncountered ( const Addr pc )

inline

Definition at line 268 of file looppoint_analysis.hh.

References encounteredPC, and gem5::MipsISA::pc.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ updateGlobalBBV()

void gem5::LooppointAnalysisManager::updateGlobalBBV ( const Addr pc )

This function is called by the LooppointAnalysis probe listener when it reaches the branch instruction for a valid basic block.

Specifically, it increments the globalBBV for the input PC.

Definition at line 246 of file looppoint_analysis.cc.

References globalBBV, and gem5::MipsISA::pc.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ updateValidControl()

void gem5::LooppointAnalysisManager::updateValidControl ( const Addr pc )

inline

Definition at line 262 of file looppoint_analysis.hh.

References gem5::MipsISA::pc, and validControlPC.

Referenced by gem5::LooppointAnalysis::checkPc().

◆ updateValidNotControl()

void gem5::LooppointAnalysisManager::updateValidNotControl ( const Addr pc )

inline

Definition at line 256 of file looppoint_analysis.hh.

References gem5::MipsISA::pc, and validNotControlPC.

Referenced by gem5::LooppointAnalysis::checkPc().

Member Data Documentation

◆ backwardBranchCounter

std::unordered_map<Addr, uint64_t> gem5::LooppointAnalysisManager::backwardBranchCounter

private

This counter is for the valid backward branches that we consider as candidates for marking the execution points.

The key is the Program Counter address of the backward branch, and the value is the number of times the backward branch is executed.

Definition at line 174 of file looppoint_analysis.hh.

Referenced by countBackwardBranch(), getBackwardBranchCounter(), getMostRecentBackwardBranchCount(), and ifBackwardBranch().

◆ bbInstMap

std::unordered_map<Addr, uint64_t> gem5::LooppointAnalysisManager::bbInstMap

private

This map stores the number of instructions in each basic block.

The key is the Program Counter address of the basic block's branch instruction, and the value is the number of instructions in the basic block.

Definition at line 191 of file looppoint_analysis.hh.

Referenced by getBBInstMap(), and updateBBInstMap().

◆ encounteredPC

std::unordered_set<Addr> gem5::LooppointAnalysisManager::encounteredPC

private

This set stores the Program Counter addresses of the encountered instructions.

Definition at line 228 of file looppoint_analysis.hh.

Referenced by ifEncountered(), and updateEncountered().

◆ globalBBV

std::unordered_map<Addr, uint64_t> gem5::LooppointAnalysisManager::globalBBV

private

This is the global basic block vector that contains the count of each basic block that is executed.

The key is the Program Counter address of the basic block's branch instruction, and the value is the number of times the basic block is executed.

Definition at line 183 of file looppoint_analysis.hh.

Referenced by clearGlobalBBV(), getGlobalBBV(), and updateGlobalBBV().

◆ globalInstCounter

uint64_t gem5::LooppointAnalysisManager::globalInstCounter

private

This is a counter for the globally executed instructions.

We use this to compare with the regionLength to determine if we reach the end of a region.

Definition at line 206 of file looppoint_analysis.hh.

Referenced by clearGlobalInstCounter(), countBackwardBranch(), getGlobalInstCounter(), and incrementGlobalInstCounter().

◆ mostRecentBackwardBranchPC

Addr gem5::LooppointAnalysisManager::mostRecentBackwardBranchPC

private

This variable stores the Program Counter address of the most recent valid backward branch that we consider as a marker.

Definition at line 212 of file looppoint_analysis.hh.

Referenced by countBackwardBranch(), getMostRecentBackwardBranchCount(), and getMostRecentBackwardBranchPC().

◆ regionLength

uint64_t gem5::LooppointAnalysisManager::regionLength

private

This variable stores the number of instructions that we used to define a region.

For example, if the regionLength is 100, then every time when there are 100 valid instructions executed globally through all the cores, we will consider that as a region.

Definition at line 199 of file looppoint_analysis.hh.

Referenced by countBackwardBranch(), and LooppointAnalysisManager().

◆ validControlPC

std::unordered_set<Addr> gem5::LooppointAnalysisManager::validControlPC

private

This set stores the Program Counter addresses of the valid control instructions.

Definition at line 223 of file looppoint_analysis.hh.

Referenced by ifValidControl(), and updateValidControl().

◆ validNotControlPC

std::unordered_set<Addr> gem5::LooppointAnalysisManager::validNotControlPC

private

This set stores the Program Counter addresses of the valid not control instructions.

Definition at line 218 of file looppoint_analysis.hh.

Referenced by ifValidNotControl(), and updateValidNotControl().

The documentation for this class was generated from the following files:

cpu/simple/probes/looppoint_analysis.hh
cpu/simple/probes/looppoint_analysis.cc

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ LooppointAnalysisManager()

Member Function Documentation

◆ clearGlobalBBV()

◆ clearGlobalInstCounter()

◆ countBackwardBranch()

◆ getBackwardBranchCounter()

◆ getBBInstMap()

◆ getGlobalBBV()

◆ getGlobalInstCounter()

◆ getMostRecentBackwardBranchCount()

◆ getMostRecentBackwardBranchPC()

◆ ifBackwardBranch()

◆ ifEncountered()

◆ ifValidControl()

◆ ifValidNotControl()

◆ incrementGlobalInstCounter()

◆ updateBBInstMap()

◆ updateEncountered()

◆ updateGlobalBBV()

◆ updateValidControl()

◆ updateValidNotControl()

Member Data Documentation

◆ backwardBranchCounter

◆ bbInstMap

◆ encounteredPC

◆ globalBBV

◆ globalInstCounter

◆ mostRecentBackwardBranchPC

◆ regionLength

◆ validControlPC

◆ validNotControlPC