DefaultCommit handles single threaded and SMT commit. More...

#include <commit.hh>

Public Types
enum	CommitStatus { Active, Inactive }
	Overall commit status. More...

enum	ThreadStatus { Running, Idle, ROBSquashing, TrapPending, FetchTrapPending, SquashAfterPending }
	Individual thread status. More...

typedef Impl::O3CPU	O3CPU

typedef Impl::DynInstPtr	DynInstPtr

typedef Impl::CPUPol	CPUPol

typedef CPUPol::RenameMap	RenameMap

typedef CPUPol::ROB	ROB

typedef CPUPol::TimeStruct	TimeStruct

typedef CPUPol::FetchStruct	FetchStruct

typedef CPUPol::IEWStruct	IEWStruct

typedef CPUPol::RenameStruct	RenameStruct

typedef CPUPol::Fetch	Fetch

typedef CPUPol::IEW	IEW

typedef O3ThreadState< Impl >	Thread

Public Member Functions
	DefaultCommit (O3CPU _cpu, DerivO3CPUParams params)
	Construct a DefaultCommit with the given parameters. More...

std::string	name () const
	Returns the name of the DefaultCommit. More...

void	regStats ()
	Registers statistics. More...

void	regProbePoints ()
	Registers probes. More...

void	setThreads (std::vector< Thread *> &threads)
	Sets the list of threads. More...

void	setTimeBuffer (TimeBuffer< TimeStruct > *tb_ptr)
	Sets the main time buffer pointer, used for backwards communication. More...

void	setFetchQueue (TimeBuffer< FetchStruct > *fq_ptr)

void	setRenameQueue (TimeBuffer< RenameStruct > *rq_ptr)
	Sets the pointer to the queue coming from rename. More...

void	setIEWQueue (TimeBuffer< IEWStruct > *iq_ptr)
	Sets the pointer to the queue coming from IEW. More...

void	setIEWStage (IEW *iew_stage)
	Sets the pointer to the IEW stage. More...

void	setActiveThreads (std::list< ThreadID > *at_ptr)
	Sets pointer to list of active threads. More...

void	setRenameMap (RenameMap rm_ptr[Impl::MaxThreads])
	Sets pointer to the commited state rename map. More...

void	setROB (ROB *rob_ptr)
	Sets pointer to the ROB. More...

void	startupStage ()
	Initializes stage by sending back the number of free entries. More...

void	clearStates (ThreadID tid)
	Clear all thread-specific states. More...

void	drain ()
	Initializes the draining of commit. More...

void	drainResume ()
	Resumes execution after draining. More...

void	drainSanityCheck () const
	Perform sanity checks after a drain. More...

bool	isDrained () const
	Has the stage drained? More...

void	takeOverFrom ()
	Takes over from another CPU's thread. More...

void	deactivateThread (ThreadID tid)
	Deschedules a thread from scheduling. More...

void	tick ()
	Ticks the commit stage, which tries to commit instructions. More...

void	commit ()
	Handles any squashes that are sent from IEW, and adds instructions to the ROB and tries to commit instructions. More...

size_t	numROBFreeEntries (ThreadID tid)
	Returns the number of free ROB entries for a specific thread. More...

void	generateTrapEvent (ThreadID tid, Fault inst_fault)
	Generates an event to schedule a squash due to a trap. More...

void	generateTCEvent (ThreadID tid)
	Records that commit needs to initiate a squash due to an external state update through the TC. More...

TheISA::PCState	pcState (ThreadID tid)
	Reads the PC of a specific thread. More...

void	pcState (const TheISA::PCState &val, ThreadID tid)
	Sets the PC of a specific thread. More...

Addr	instAddr (ThreadID tid)
	Returns the PC of a specific thread. More...

Addr	nextInstAddr (ThreadID tid)
	Returns the next PC of a specific thread. More...

Addr	microPC (ThreadID tid)
	Reads the micro PC of a specific thread. More...

Public Attributes
IEW *	iewStage
	The pointer to the IEW stage. More...

ROB *	rob
	ROB interface. More...

Private Member Functions
void	processTrapEvent (ThreadID tid)
	Mark the thread as processing a trap. More...

void	updateStatus ()
	Updates the overall status of commit with the nextStatus, and tell the CPU if commit is active/inactive. More...

bool	changedROBEntries ()
	Returns if any of the threads have the number of ROB entries changed on this cycle. More...

void	squashAll (ThreadID tid)
	Squashes all in flight instructions. More...

void	squashFromTrap (ThreadID tid)
	Handles squashing due to a trap. More...

void	squashFromTC (ThreadID tid)
	Handles squashing due to an TC write. More...

void	squashFromSquashAfter (ThreadID tid)
	Handles a squash from a squashAfter() request. More...

void	squashAfter (ThreadID tid, const DynInstPtr &head_inst)
	Handle squashing from instruction with SquashAfter set. More...

void	handleInterrupt ()
	Handles processing an interrupt. More...

void	propagateInterrupt ()
	Get fetch redirecting so we can handle an interrupt. More...

void	commitInsts ()
	Commits as many instructions as possible. More...

bool	commitHead (const DynInstPtr &head_inst, unsigned inst_num)
	Tries to commit the head ROB instruction passed in. More...

void	getInsts ()
	Gets instructions from rename and inserts them into the ROB. More...

void	markCompletedInsts ()
	Marks completed instructions using information sent from IEW. More...

ThreadID	getCommittingThread ()
	Gets the thread to commit, based on the SMT policy. More...

ThreadID	roundRobin ()
	Returns the thread ID to use based on a round robin policy. More...

ThreadID	oldestReady ()
	Returns the thread ID to use based on an oldest instruction policy. More...

void	updateComInstStats (const DynInstPtr &inst)
	Updates commit stats based on this instruction. More...

Private Attributes
CommitStatus	_status
	Overall commit status. More...

CommitStatus	_nextStatus
	Next commit status, to be set at the end of the cycle. More...

ThreadStatus	commitStatus [Impl::MaxThreads]
	Per-thread status. More...

CommitPolicy	commitPolicy
	Commit policy used in SMT mode. More...

ProbePointArg< DynInstPtr > *	ppCommit
	Probe Points. More...

ProbePointArg< DynInstPtr > *	ppCommitStall

ProbePointArg< DynInstPtr > *	ppSquash
	To probe when an instruction is squashed. More...

TimeBuffer< TimeStruct > *	timeBuffer
	Time buffer interface. More...

TimeBuffer< TimeStruct >::wire	toIEW
	Wire to write information heading to previous stages. More...

TimeBuffer< TimeStruct >::wire	robInfoFromIEW
	Wire to read information from IEW (for ROB). More...

TimeBuffer< FetchStruct > *	fetchQueue

TimeBuffer< FetchStruct >::wire	fromFetch

TimeBuffer< IEWStruct > *	iewQueue
	IEW instruction queue interface. More...

TimeBuffer< IEWStruct >::wire	fromIEW
	Wire to read information from IEW queue. More...

TimeBuffer< RenameStruct > *	renameQueue
	Rename instruction queue interface, for ROB. More...

TimeBuffer< RenameStruct >::wire	fromRename
	Wire to read information from rename queue. More...

O3CPU *	cpu
	Pointer to O3CPU. More...

std::vector< Thread * >	thread
	Vector of all of the threads. More...

bool	wroteToTimeBuffer
	Records that commit has written to the time buffer this cycle. More...

bool	changedROBNumEntries [Impl::MaxThreads]
	Records if the number of ROB entries has changed this cycle. More...

bool	trapSquash [Impl::MaxThreads]
	Records if a thread has to squash this cycle due to a trap. More...

bool	tcSquash [Impl::MaxThreads]
	Records if a thread has to squash this cycle due to an XC write. More...

DynInstPtr	squashAfterInst [Impl::MaxThreads]
	Instruction passed to squashAfter(). More...

std::list< ThreadID >	priority_list
	Priority List used for Commit Policy. More...

const Cycles	iewToCommitDelay
	IEW to Commit delay. More...

const Cycles	commitToIEWDelay
	Commit to IEW delay. More...

const Cycles	renameToROBDelay
	Rename to ROB delay. More...

const Cycles	fetchToCommitDelay

const unsigned	renameWidth
	Rename width, in instructions. More...

const unsigned	commitWidth
	Commit width, in instructions. More...

unsigned	numRobs
	Number of Reorder Buffers. More...

const ThreadID	numThreads
	Number of Active Threads. More...

bool	drainPending
	Is a drain pending? Commit is looking for an instruction boundary while there are no pending interrupts. More...

bool	drainImminent
	Is a drain imminent? Commit has found an instruction boundary while no interrupts were present or in flight. More...

const Cycles	trapLatency
	The latency to handle a trap. More...

Fault	interrupt
	The interrupt fault. More...

TheISA::PCState	pc [Impl::MaxThreads]
	The commit PC state of each thread. More...

InstSeqNum	youngestSeqNum [Impl::MaxThreads]
	The sequence number of the youngest valid instruction in the ROB. More...

InstSeqNum	lastCommitedSeqNum [Impl::MaxThreads]
	The sequence number of the last commited instruction. More...

bool	trapInFlight [Impl::MaxThreads]
	Records if there is a trap currently in flight. More...

bool	committedStores [Impl::MaxThreads]
	Records if there were any stores committed this cycle. More...

bool	checkEmptyROB [Impl::MaxThreads]
	Records if commit should check if the ROB is truly empty (see commit_impl.hh). More...

std::list< ThreadID > *	activeThreads
	Pointer to the list of active threads. More...

RenameMap *	renameMap [Impl::MaxThreads]
	Rename map interface. More...

bool	canHandleInterrupts
	True if last committed microop can be followed by an interrupt. More...

bool	avoidQuiesceLiveLock
	Have we had an interrupt pending and then seen it de-asserted because of a masking change? In this case the variable is set and the next time interrupts are enabled and pending the pipeline will squash to avoid a possible livelock senario. More...

Stats::Scalar	commitSquashedInsts
	Stat for the total number of squashed instructions discarded by commit. More...

Stats::Scalar	commitNonSpecStalls
	Stat for the total number of times commit has had to stall due to a non- speculative instruction reaching the head of the ROB. More...

Stats::Scalar	branchMispredicts
	Stat for the total number of branch mispredicts that caused a squash. More...

Stats::Distribution	numCommittedDist
	Distribution of the number of committed instructions each cycle. More...

Stats::Vector	instsCommitted
	Total number of instructions committed. More...

Stats::Vector	opsCommitted
	Total number of ops (including micro ops) committed. More...

Stats::Vector	statComSwp
	Total number of software prefetches committed. More...

Stats::Vector	statComRefs
	Stat for the total number of committed memory references. More...

Stats::Vector	statComLoads
	Stat for the total number of committed loads. More...

Stats::Vector	statComAmos
	Stat for the total number of committed atomics. More...

Stats::Vector	statComMembars
	Total number of committed memory barriers. More...

Stats::Vector	statComBranches
	Total number of committed branches. More...

Stats::Vector	statComVector
	Total number of vector instructions. More...

Stats::Vector	statComFloating
	Total number of floating point instructions. More...

Stats::Vector	statComInteger
	Total number of integer instructions. More...

Stats::Vector	statComFunctionCalls
	Total number of function calls. More...

Stats::Vector2d	statCommittedInstType
	Committed instructions by instruction type (OpClass) More...

Stats::Scalar	commitEligibleSamples
	Number of cycles where the commit bandwidth limit is reached. More...

Detailed Description

template<class Impl>
class DefaultCommit< Impl >

DefaultCommit handles single threaded and SMT commit.

Its width is specified by the parameters; each cycle it tries to commit that many instructions. The SMT policy decides which thread it tries to commit instructions from. Non- speculative instructions must reach the head of the ROB before they are ready to execute; once they reach the head, commit will broadcast the instruction's sequence number to the previous stages so that they can issue/ execute the instruction. Only one non-speculative instruction is handled per cycle. Commit is responsible for handling all back-end initiated redirects. It receives the redirect, and then broadcasts it to all stages, indicating the sequence number they should squash until, and any necessary branch misprediction information as well. It priortizes redirects by instruction's age, only broadcasting a redirect if it corresponds to an instruction that should currently be in the ROB. This is done by tracking the sequence number of the youngest instruction in the ROB, which gets updated to any squashing instruction's sequence number, and only broadcasting a redirect if it corresponds to an older instruction. Commit also supports multiple cycle squashing, to model a ROB that can only remove a certain number of instructions per cycle.

Definition at line 84 of file commit.hh.

Member Typedef Documentation

◆ CPUPol

template<class Impl >

typedef Impl::CPUPol DefaultCommit< Impl >::CPUPol

Definition at line 90 of file commit.hh.

◆ DynInstPtr

template<class Impl >

typedef Impl::DynInstPtr DefaultCommit< Impl >::DynInstPtr

Definition at line 89 of file commit.hh.

◆ Fetch

template<class Impl >

typedef CPUPol::Fetch DefaultCommit< Impl >::Fetch

Definition at line 100 of file commit.hh.

◆ FetchStruct

template<class Impl >

typedef CPUPol::FetchStruct DefaultCommit< Impl >::FetchStruct

Definition at line 96 of file commit.hh.

◆ IEW

template<class Impl >

typedef CPUPol::IEW DefaultCommit< Impl >::IEW

Definition at line 101 of file commit.hh.

◆ IEWStruct

template<class Impl >

typedef CPUPol::IEWStruct DefaultCommit< Impl >::IEWStruct

Definition at line 97 of file commit.hh.

◆ O3CPU

template<class Impl >

typedef Impl::O3CPU DefaultCommit< Impl >::O3CPU

Definition at line 88 of file commit.hh.

◆ RenameMap

template<class Impl >

typedef CPUPol::RenameMap DefaultCommit< Impl >::RenameMap

Definition at line 92 of file commit.hh.

◆ RenameStruct

template<class Impl >

typedef CPUPol::RenameStruct DefaultCommit< Impl >::RenameStruct

Definition at line 98 of file commit.hh.

◆ ROB

template<class Impl >

typedef CPUPol::ROB DefaultCommit< Impl >::ROB

Definition at line 93 of file commit.hh.

◆ Thread

template<class Impl >

typedef O3ThreadState<Impl> DefaultCommit< Impl >::Thread

Definition at line 103 of file commit.hh.

◆ TimeStruct

template<class Impl >

typedef CPUPol::TimeStruct DefaultCommit< Impl >::TimeStruct

Definition at line 95 of file commit.hh.

Member Enumeration Documentation

◆ CommitStatus

template<class Impl >

enum DefaultCommit::CommitStatus

Overall commit status.

Used to determine if the CPU can deschedule itself due to a lack of activity.

Enumerator
Active
Inactive

Definition at line 108 of file commit.hh.

◆ ThreadStatus

template<class Impl >

enum DefaultCommit::ThreadStatus

Individual thread status.

Enumerator
Running
Idle
ROBSquashing
TrapPending
FetchTrapPending
SquashAfterPending

Definition at line 114 of file commit.hh.

Constructor & Destructor Documentation

◆ DefaultCommit()

template<class Impl >

DefaultCommit< Impl >::DefaultCommit	(	O3CPU *	_cpu,
		DerivO3CPUParams *	params
	)

Construct a DefaultCommit with the given parameters.

Definition at line 84 of file commit_impl.hh.

Member Function Documentation

◆ changedROBEntries()

template<class Impl >

bool DefaultCommit< Impl >::changedROBEntries ( )

private

Returns if any of the threads have the number of ROB entries changed on this cycle.

Used to determine if the number of free ROB entries needs to be sent back to previous stages.

Definition at line 503 of file commit_impl.hh.

References DefaultCommit< Impl >::activeThreads, and DefaultCommit< Impl >::changedROBNumEntries.

◆ clearStates()

template<class Impl >

void DefaultCommit< Impl >::clearStates ( ThreadID tid )

Clear all thread-specific states.

Definition at line 376 of file commit_impl.hh.

References DefaultCommit< Impl >::changedROBNumEntries, DefaultCommit< Impl >::checkEmptyROB, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::committedStores, DefaultCommit< Impl >::Idle, DefaultCommit< Impl >::lastCommitedSeqNum, DefaultCommit< Impl >::pc, DefaultCommit< Impl >::squashAfterInst, DefaultCommit< Impl >::tcSquash, DefaultCommit< Impl >::trapInFlight, and DefaultCommit< Impl >::trapSquash.

◆ commit()

template<class Impl >

void DefaultCommit< Impl >::commit ( )

Handles any squashes that are sent from IEW, and adds instructions to the ROB and tries to commit instructions.

Definition at line 815 of file commit_impl.hh.

Referenced by DefaultCommit< Impl >::tick().

◆ commitHead()

template<class Impl >

bool DefaultCommit< Impl >::commitHead	(	const DynInstPtr &	head_inst,
		unsigned	inst_num
	)

private

Tries to commit the head ROB instruction passed in.

Parameters

head_inst The instruction to be committed.

Definition at line 1155 of file commit_impl.hh.

Referenced by DefaultCommit< Impl >::commitInsts().

◆ commitInsts()

template<class Impl >

void DefaultCommit< Impl >::commitInsts ( )

private

Commits as many instructions as possible.

Definition at line 978 of file commit_impl.hh.

Referenced by DefaultCommit< Impl >::commit().

◆ deactivateThread()

template<class Impl >

void DefaultCommit< Impl >::deactivateThread ( ThreadID tid )

Deschedules a thread from scheduling.

Definition at line 459 of file commit_impl.hh.

References DefaultCommit< Impl >::priority_list.

◆ drain()

template<class Impl >

void DefaultCommit< Impl >::drain ( )

Initializes the draining of commit.

Definition at line 392 of file commit_impl.hh.

References DefaultCommit< Impl >::drainPending.

◆ drainResume()

template<class Impl >

void DefaultCommit< Impl >::drainResume ( )

Resumes execution after draining.

Definition at line 399 of file commit_impl.hh.

References DefaultCommit< Impl >::drainImminent, and DefaultCommit< Impl >::drainPending.

◆ drainSanityCheck()

template<class Impl >

void DefaultCommit< Impl >::drainSanityCheck ( ) const

Perform sanity checks after a drain.

Definition at line 407 of file commit_impl.hh.

References ROB< Impl >::drainSanityCheck(), DefaultCommit< Impl >::isDrained(), and DefaultCommit< Impl >::rob.

◆ generateTCEvent()

template<class Impl >

void DefaultCommit< Impl >::generateTCEvent ( ThreadID tid )

Records that commit needs to initiate a squash due to an external state update through the TC.

Definition at line 546 of file commit_impl.hh.

References DPRINTF, DefaultCommit< Impl >::tcSquash, and DefaultCommit< Impl >::trapInFlight.

◆ generateTrapEvent()

template<class Impl >

void DefaultCommit< Impl >::generateTrapEvent	(	ThreadID	tid,
		Fault	inst_fault
	)

Generates an event to schedule a squash due to a trap.

Definition at line 528 of file commit_impl.hh.

References DefaultCommit< Impl >::cpu, EventBase::CPU_Tick_Pri, DPRINTF, DefaultCommit< Impl >::processTrapEvent(), DefaultCommit< Impl >::thread, DefaultCommit< Impl >::trapInFlight, and DefaultCommit< Impl >::trapLatency.

Referenced by DefaultCommit< Impl >::commitHead(), and DefaultCommit< Impl >::handleInterrupt().

◆ getCommittingThread()

template<class Impl >

ThreadID DefaultCommit< Impl >::getCommittingThread ( )

private

Gets the thread to commit, based on the SMT policy.

Definition at line 1459 of file commit_impl.hh.

References DefaultCommit< Impl >::activeThreads, DefaultCommit< Impl >::commitPolicy, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::FetchTrapPending, DefaultCommit< Impl >::Idle, InvalidThreadID, DefaultCommit< Impl >::numThreads, DefaultCommit< Impl >::oldestReady(), DefaultCommit< Impl >::roundRobin(), and DefaultCommit< Impl >::Running.

Referenced by DefaultCommit< Impl >::commitInsts().

◆ getInsts()

template<class Impl >

void DefaultCommit< Impl >::getInsts ( )

private

Gets instructions from rename and inserts them into the ROB.

Definition at line 1341 of file commit_impl.hh.

References DefaultCommit< Impl >::changedROBNumEntries, DefaultCommit< Impl >::commitStatus, DPRINTF, DefaultCommit< Impl >::fromRename, ROB< Impl >::getMaxEntries(), ROB< Impl >::getThreadEntries(), ROB< Impl >::insertInst(), DefaultCommit< Impl >::renameWidth, DefaultCommit< Impl >::rob, DefaultCommit< Impl >::ROBSquashing, TimeBuffer< T >::size, DefaultCommit< Impl >::TrapPending, and DefaultCommit< Impl >::youngestSeqNum.

Referenced by DefaultCommit< Impl >::commit().

◆ handleInterrupt()

template<class Impl >

void DefaultCommit< Impl >::handleInterrupt ( )

private

Handles processing an interrupt.

Definition at line 736 of file commit_impl.hh.

References DefaultCommit< Impl >::avoidQuiesceLiveLock, DefaultCommit< Impl >::canHandleInterrupts, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DPRINTF, DefaultCommit< Impl >::generateTrapEvent(), DefaultCommit< Impl >::interrupt, NoFault, DefaultCommit< Impl >::thread, DefaultCommit< Impl >::toIEW, and DefaultCommit< Impl >::TrapPending.

Referenced by DefaultCommit< Impl >::commitInsts().

◆ instAddr()

template<class Impl >

Addr DefaultCommit< Impl >::instAddr ( ThreadID tid )

inline

Returns the PC of a specific thread.

Definition at line 322 of file commit.hh.

References DefaultCommit< Impl >::pc.

Referenced by DefaultCommit< Impl >::commitInsts().

◆ isDrained()

template<class Impl >

bool DefaultCommit< Impl >::isDrained ( ) const

Has the stage drained?

Definition at line 415 of file commit_impl.hh.

References DefaultCommit< Impl >::interrupt, ROB< Impl >::isEmpty(), DefaultCommit< Impl >::microPC(), NoFault, DefaultCommit< Impl >::numThreads, DefaultCommit< Impl >::pc, and DefaultCommit< Impl >::rob.

Referenced by DefaultCommit< Impl >::drainSanityCheck().

◆ markCompletedInsts()

template<class Impl >

void DefaultCommit< Impl >::markCompletedInsts ( )

private

Marks completed instructions using information sent from IEW.

Definition at line 1375 of file commit_impl.hh.

References DPRINTF, DefaultCommit< Impl >::fromIEW, and TimeBuffer< T >::size.

Referenced by DefaultCommit< Impl >::tick().

◆ microPC()

template<class Impl >

Addr DefaultCommit< Impl >::microPC ( ThreadID tid )

inline

Reads the micro PC of a specific thread.

Definition at line 328 of file commit.hh.

References DefaultCommit< Impl >::pc.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::isDrained().

◆ name()

template<class Impl >

std::string DefaultCommit< Impl >::name ( ) const

Returns the name of the DefaultCommit.

Definition at line 134 of file commit_impl.hh.

References DefaultCommit< Impl >::cpu.

Referenced by DefaultCommit< Impl >::regStats().

◆ nextInstAddr()

template<class Impl >

Addr DefaultCommit< Impl >::nextInstAddr ( ThreadID tid )

inline

Returns the next PC of a specific thread.

Definition at line 325 of file commit.hh.

References DefaultCommit< Impl >::pc.

◆ numROBFreeEntries()

template<class Impl >

size_t DefaultCommit< Impl >::numROBFreeEntries ( ThreadID tid )

Returns the number of free ROB entries for a specific thread.

Definition at line 521 of file commit_impl.hh.

References ROB< Impl >::numFreeEntries(), and DefaultCommit< Impl >::rob.

◆ oldestReady()

template<class Impl >

ThreadID DefaultCommit< Impl >::oldestReady ( )

private

Returns the thread ID to use based on an oldest instruction policy.

Definition at line 1523 of file commit_impl.hh.

References DefaultCommit< Impl >::activeThreads, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::FetchTrapPending, DefaultCommit< Impl >::Idle, InvalidThreadID, ROB< Impl >::isEmpty(), ROB< Impl >::isHeadReady(), ROB< Impl >::readHeadInst(), DefaultCommit< Impl >::rob, and DefaultCommit< Impl >::Running.

Referenced by DefaultCommit< Impl >::getCommittingThread().

◆ pcState() [1/2]

template<class Impl >

TheISA::PCState DefaultCommit< Impl >::pcState ( ThreadID tid )

inline

Reads the PC of a specific thread.

Definition at line 315 of file commit.hh.

References DefaultCommit< Impl >::pc.

◆ pcState() [2/2]

template<class Impl >

void DefaultCommit< Impl >::pcState	(	const TheISA::PCState &	val,
		ThreadID	tid
	)

inline

Sets the PC of a specific thread.

Definition at line 318 of file commit.hh.

References DefaultCommit< Impl >::pc, and X86ISA::val.

◆ processTrapEvent()

template<class Impl >

void DefaultCommit< Impl >::processTrapEvent ( ThreadID tid )

private

Mark the thread as processing a trap.

Definition at line 76 of file commit_impl.hh.

Referenced by DefaultCommit< Impl >::generateTrapEvent().

◆ propagateInterrupt()

template<class Impl >

void DefaultCommit< Impl >::propagateInterrupt ( )

private

Get fetch redirecting so we can handle an interrupt.

Definition at line 790 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DefaultCommit< Impl >::drainImminent, DefaultCommit< Impl >::interrupt, NoFault, DefaultCommit< Impl >::tcSquash, DefaultCommit< Impl >::toIEW, DefaultCommit< Impl >::TrapPending, and DefaultCommit< Impl >::trapSquash.

Referenced by DefaultCommit< Impl >::commit().

◆ regProbePoints()

template<class Impl >

void DefaultCommit< Impl >::regProbePoints ( )

Registers probes.

Definition at line 141 of file commit_impl.hh.

References DefaultCommit< Impl >::cpu, DefaultCommit< Impl >::ppCommit, DefaultCommit< Impl >::ppCommitStall, and DefaultCommit< Impl >::ppSquash.

◆ regStats()

template<class Impl >

void DefaultCommit< Impl >::regStats ( )

Registers statistics.

Definition at line 150 of file commit_impl.hh.

◆ roundRobin()

template<class Impl >

ThreadID DefaultCommit< Impl >::roundRobin ( )

private

Returns the thread ID to use based on a round robin policy.

Definition at line 1495 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::FetchTrapPending, DefaultCommit< Impl >::Idle, InvalidThreadID, ROB< Impl >::isHeadReady(), DefaultCommit< Impl >::priority_list, DefaultCommit< Impl >::rob, and DefaultCommit< Impl >::Running.

Referenced by DefaultCommit< Impl >::getCommittingThread().

◆ setActiveThreads()

template<class Impl >

void DefaultCommit< Impl >::setActiveThreads ( std::list< ThreadID > * at_ptr )

Sets pointer to list of active threads.

Definition at line 333 of file commit_impl.hh.

References DefaultCommit< Impl >::activeThreads.

◆ setFetchQueue()

template<class Impl >

void DefaultCommit< Impl >::setFetchQueue ( TimeBuffer< FetchStruct > * fq_ptr )

Definition at line 296 of file commit_impl.hh.

References DefaultCommit< Impl >::fetchQueue, DefaultCommit< Impl >::fetchToCommitDelay, DefaultCommit< Impl >::fromFetch, and TimeBuffer< T >::getWire().

◆ setIEWQueue()

template<class Impl >

void DefaultCommit< Impl >::setIEWQueue ( TimeBuffer< IEWStruct > * iq_ptr )

Sets the pointer to the queue coming from IEW.

Definition at line 316 of file commit_impl.hh.

References DefaultCommit< Impl >::fromIEW, TimeBuffer< T >::getWire(), DefaultCommit< Impl >::iewQueue, and DefaultCommit< Impl >::iewToCommitDelay.

◆ setIEWStage()

template<class Impl >

void DefaultCommit< Impl >::setIEWStage ( IEW * iew_stage )

Sets the pointer to the IEW stage.

Definition at line 326 of file commit_impl.hh.

References DefaultCommit< Impl >::iewStage.

◆ setRenameMap()

template<class Impl >

void DefaultCommit< Impl >::setRenameMap ( RenameMap rm_ptr[Impl::MaxThreads] )

Sets pointer to the commited state rename map.

Definition at line 340 of file commit_impl.hh.

References DefaultCommit< Impl >::numThreads, and DefaultCommit< Impl >::renameMap.

◆ setRenameQueue()

template<class Impl >

void DefaultCommit< Impl >::setRenameQueue ( TimeBuffer< RenameStruct > * rq_ptr )

Sets the pointer to the queue coming from rename.

Definition at line 306 of file commit_impl.hh.

References DefaultCommit< Impl >::fromRename, TimeBuffer< T >::getWire(), DefaultCommit< Impl >::renameQueue, and DefaultCommit< Impl >::renameToROBDelay.

◆ setROB()

template<class Impl >

void DefaultCommit< Impl >::setROB ( ROB * rob_ptr )

Sets pointer to the ROB.

Definition at line 348 of file commit_impl.hh.

References DefaultCommit< Impl >::rob.

◆ setThreads()

template<class Impl >

void DefaultCommit< Impl >::setThreads ( std::vector< Thread *> & threads )

Sets the list of threads.

Definition at line 276 of file commit_impl.hh.

References DefaultCommit< Impl >::thread.

◆ setTimeBuffer()

template<class Impl >

void DefaultCommit< Impl >::setTimeBuffer ( TimeBuffer< TimeStruct > * tb_ptr )

Sets the main time buffer pointer, used for backwards communication.

Definition at line 283 of file commit_impl.hh.

References TimeBuffer< T >::getWire(), DefaultCommit< Impl >::iewToCommitDelay, DefaultCommit< Impl >::robInfoFromIEW, DefaultCommit< Impl >::timeBuffer, and DefaultCommit< Impl >::toIEW.

◆ squashAfter()

template<class Impl >

void DefaultCommit< Impl >::squashAfter	(	ThreadID	tid,
		const DynInstPtr &	head_inst
	)

private

Handle squashing from instruction with SquashAfter set.

This differs from the other squashes as it squashes following instructions instead of the current instruction and doesn't clean up various status bits about traps/tc writes pending. Since there might have been instructions committed by the commit stage before the squashing instruction was reached and we can't commit and squash in the same cycle, we have to squash in two steps:

Immediately set the commit status of the thread of SquashAfterPending. This forces the thread to stop committing instructions in this cycle. The last instruction to be committed in this cycle will be the SquashAfter instruction.
In the next cycle, commit() checks for the SquashAfterPending state and squashes all in-flight instructions. Since the SquashAfter instruction was the last instruction to be committed in the previous cycle, this causes all subsequent instructions to be squashed.

Parameters

tid	ID of the thread to squash.
head_inst	Instruction that requested the squash.

Definition at line 645 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DPRINTF, DefaultCommit< Impl >::squashAfterInst, and DefaultCommit< Impl >::SquashAfterPending.

Referenced by DefaultCommit< Impl >::commitInsts().

◆ squashAll()

template<class Impl >

void DefaultCommit< Impl >::squashAll ( ThreadID tid )

private

Squashes all in flight instructions.

Definition at line 556 of file commit_impl.hh.

References DefaultCommit< Impl >::changedROBNumEntries, ROB< Impl >::isEmpty(), DefaultCommit< Impl >::lastCommitedSeqNum, DefaultCommit< Impl >::pc, ROB< Impl >::readHeadInst(), DefaultCommit< Impl >::rob, ROB< Impl >::squash(), DefaultCommit< Impl >::toIEW, and DefaultCommit< Impl >::youngestSeqNum.

Referenced by DefaultCommit< Impl >::squashFromSquashAfter(), DefaultCommit< Impl >::squashFromTC(), and DefaultCommit< Impl >::squashFromTrap().

◆ squashFromSquashAfter()

template<class Impl >

void DefaultCommit< Impl >::squashFromSquashAfter ( ThreadID tid )

private

Handles a squash from a squashAfter() request.

Definition at line 627 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DPRINTF, DefaultCommit< Impl >::pc, DefaultCommit< Impl >::ROBSquashing, DefaultCommit< Impl >::squashAfterInst, DefaultCommit< Impl >::squashAll(), and DefaultCommit< Impl >::toIEW.

Referenced by DefaultCommit< Impl >::commit().

◆ squashFromTC()

template<class Impl >

void DefaultCommit< Impl >::squashFromTC ( ThreadID tid )

private

Handles squashing due to an TC write.

Definition at line 610 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DPRINTF, DefaultCommit< Impl >::pc, DefaultCommit< Impl >::ROBSquashing, DefaultCommit< Impl >::squashAll(), DefaultCommit< Impl >::tcSquash, and DefaultCommit< Impl >::thread.

Referenced by DefaultCommit< Impl >::commit().

◆ squashFromTrap()

template<class Impl >

void DefaultCommit< Impl >::squashFromTrap ( ThreadID tid )

private

Handles squashing due to a trap.

Definition at line 592 of file commit_impl.hh.

References DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DPRINTF, DefaultCommit< Impl >::pc, DefaultCommit< Impl >::ROBSquashing, DefaultCommit< Impl >::squashAll(), DefaultCommit< Impl >::thread, DefaultCommit< Impl >::trapInFlight, and DefaultCommit< Impl >::trapSquash.

Referenced by DefaultCommit< Impl >::commit().

◆ startupStage()

template<class Impl >

void DefaultCommit< Impl >::startupStage ( )

Initializes stage by sending back the number of free entries.

Definition at line 355 of file commit_impl.hh.

References DefaultCommit< Impl >::activeThreads, DefaultCommit< Impl >::cpu, ROB< Impl >::numFreeEntries(), DefaultCommit< Impl >::numThreads, ROB< Impl >::resetEntries(), DefaultCommit< Impl >::rob, ROB< Impl >::setActiveThreads(), and DefaultCommit< Impl >::toIEW.

◆ takeOverFrom()

template<class Impl >

void DefaultCommit< Impl >::takeOverFrom ( )

Takes over from another CPU's thread.

Definition at line 443 of file commit_impl.hh.

References DefaultCommit< Impl >::_nextStatus, DefaultCommit< Impl >::_status, DefaultCommit< Impl >::Active, DefaultCommit< Impl >::changedROBNumEntries, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::Idle, DefaultCommit< Impl >::Inactive, DefaultCommit< Impl >::numThreads, DefaultCommit< Impl >::rob, DefaultCommit< Impl >::squashAfterInst, ROB< Impl >::takeOverFrom(), DefaultCommit< Impl >::tcSquash, and DefaultCommit< Impl >::trapSquash.

◆ tick()

template<class Impl >

void DefaultCommit< Impl >::tick ( )

Ticks the commit stage, which tries to commit instructions.

Definition at line 657 of file commit_impl.hh.

◆ updateComInstStats()

template<class Impl >

void DefaultCommit< Impl >::updateComInstStats ( const DynInstPtr & inst )

private

Updates commit stats based on this instruction.

Definition at line 1396 of file commit_impl.hh.

References DefaultCommit< Impl >::cpu, DefaultCommit< Impl >::instsCommitted, DefaultCommit< Impl >::opsCommitted, DefaultCommit< Impl >::statComAmos, DefaultCommit< Impl >::statComBranches, DefaultCommit< Impl >::statComFloating, DefaultCommit< Impl >::statComFunctionCalls, DefaultCommit< Impl >::statComInteger, DefaultCommit< Impl >::statComLoads, DefaultCommit< Impl >::statComMembars, DefaultCommit< Impl >::statComRefs, and DefaultCommit< Impl >::statComVector.

Referenced by DefaultCommit< Impl >::commitHead().

◆ updateStatus()

template<class Impl >

void DefaultCommit< Impl >::updateStatus ( )

private

Updates the overall status of commit with the nextStatus, and tell the CPU if commit is active/inactive.

Definition at line 472 of file commit_impl.hh.

References DefaultCommit< Impl >::_nextStatus, DefaultCommit< Impl >::_status, DefaultCommit< Impl >::Active, DefaultCommit< Impl >::activeThreads, DefaultCommit< Impl >::changedROBNumEntries, DefaultCommit< Impl >::commitStatus, DefaultCommit< Impl >::cpu, DPRINTF, DefaultCommit< Impl >::FetchTrapPending, DefaultCommit< Impl >::Inactive, and DefaultCommit< Impl >::TrapPending.

Referenced by DefaultCommit< Impl >::tick().

Member Data Documentation

◆ _nextStatus

template<class Impl >

CommitStatus DefaultCommit< Impl >::_nextStatus

private

Next commit status, to be set at the end of the cycle.

Definition at line 127 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::takeOverFrom(), DefaultCommit< Impl >::tick(), and DefaultCommit< Impl >::updateStatus().

◆ _status

template<class Impl >

CommitStatus DefaultCommit< Impl >::_status

private

Overall commit status.

Definition at line 125 of file commit.hh.

Referenced by DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::takeOverFrom(), and DefaultCommit< Impl >::updateStatus().

◆ activeThreads

template<class Impl >

std::list<ThreadID>* DefaultCommit< Impl >::activeThreads

private

Pointer to the list of active threads.

Definition at line 462 of file commit.hh.

Referenced by DefaultCommit< Impl >::changedROBEntries(), DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::getCommittingThread(), DefaultCommit< Impl >::oldestReady(), DefaultCommit< Impl >::setActiveThreads(), DefaultCommit< Impl >::startupStage(), DefaultCommit< Impl >::tick(), and DefaultCommit< Impl >::updateStatus().

◆ avoidQuiesceLiveLock

template<class Impl >

bool DefaultCommit< Impl >::avoidQuiesceLiveLock

private

Have we had an interrupt pending and then seen it de-asserted because of a masking change? In this case the variable is set and the next time interrupts are enabled and pending the pipeline will squash to avoid a possible livelock senario.

Definition at line 474 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::handleInterrupt().

◆ branchMispredicts

template<class Impl >

Stats::Scalar DefaultCommit< Impl >::branchMispredicts

private

Stat for the total number of branch mispredicts that caused a squash.

Definition at line 487 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), and DefaultCommit< Impl >::regStats().

◆ canHandleInterrupts

template<class Impl >

bool DefaultCommit< Impl >::canHandleInterrupts

private

True if last committed microop can be followed by an interrupt.

Definition at line 468 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::handleInterrupt().

◆ changedROBNumEntries

template<class Impl >

bool DefaultCommit< Impl >::changedROBNumEntries[Impl::MaxThreads]

private

Records if the number of ROB entries has changed this cycle.

If it has, then the number of free entries must be re-broadcast.

Definition at line 375 of file commit.hh.

Referenced by DefaultCommit< Impl >::changedROBEntries(), DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::getInsts(), DefaultCommit< Impl >::squashAll(), DefaultCommit< Impl >::takeOverFrom(), and DefaultCommit< Impl >::updateStatus().

◆ checkEmptyROB

template<class Impl >

bool DefaultCommit< Impl >::checkEmptyROB[Impl::MaxThreads]

private

Records if commit should check if the ROB is truly empty (see commit_impl.hh).

Definition at line 459 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commit(), and DefaultCommit< Impl >::DefaultCommit().

◆ commitEligibleSamples

template<class Impl >

Stats::Scalar DefaultCommit< Impl >::commitEligibleSamples

private

Number of cycles where the commit bandwidth limit is reached.

Definition at line 519 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regStats().

◆ commitNonSpecStalls

template<class Impl >

Stats::Scalar DefaultCommit< Impl >::commitNonSpecStalls

private

Stat for the total number of times commit has had to stall due to a non- speculative instruction reaching the head of the ROB.

Definition at line 485 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitHead(), and DefaultCommit< Impl >::regStats().

◆ commitPolicy

template<class Impl >

CommitPolicy DefaultCommit< Impl >::commitPolicy

private

Commit policy used in SMT mode.

Definition at line 131 of file commit.hh.

Referenced by DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::getCommittingThread().

◆ commitSquashedInsts

template<class Impl >

Stats::Scalar DefaultCommit< Impl >::commitSquashedInsts

private

Stat for the total number of squashed instructions discarded by commit.

Definition at line 481 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regStats().

◆ commitStatus

template<class Impl >

ThreadStatus DefaultCommit< Impl >::commitStatus[Impl::MaxThreads]

private

Per-thread status.

Definition at line 129 of file commit.hh.

◆ committedStores

template<class Impl >

bool DefaultCommit< Impl >::committedStores[Impl::MaxThreads]

private

Records if there were any stores committed this cycle.

Definition at line 455 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::commitHead(), DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::tick().

◆ commitToIEWDelay

template<class Impl >

const Cycles DefaultCommit< Impl >::commitToIEWDelay

private

Commit to IEW delay.

Definition at line 399 of file commit.hh.

◆ commitWidth

template<class Impl >

const unsigned DefaultCommit< Impl >::commitWidth

private

Commit width, in instructions.

Definition at line 412 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::regStats().

◆ cpu

template<class Impl >

O3CPU* DefaultCommit< Impl >::cpu

private

Pointer to O3CPU.

Definition at line 362 of file commit.hh.

◆ drainImminent

template<class Impl >

bool DefaultCommit< Impl >::drainImminent

private

Is a drain imminent? Commit has found an instruction boundary while no interrupts were present or in flight.

This was the last architecturally committed instruction. Interrupts disabled and pipeline flushed. Waiting for structures to finish draining.

Definition at line 430 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::drainResume(), and DefaultCommit< Impl >::propagateInterrupt().

◆ drainPending

template<class Impl >

bool DefaultCommit< Impl >::drainPending

private

Is a drain pending? Commit is looking for an instruction boundary while there are no pending interrupts.

Definition at line 423 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::drain(), and DefaultCommit< Impl >::drainResume().

◆ fetchQueue

template<class Impl >

TimeBuffer<FetchStruct>* DefaultCommit< Impl >::fetchQueue

private

Definition at line 340 of file commit.hh.

Referenced by DefaultCommit< Impl >::setFetchQueue().

◆ fetchToCommitDelay

template<class Impl >

const Cycles DefaultCommit< Impl >::fetchToCommitDelay

private

Definition at line 404 of file commit.hh.

Referenced by DefaultCommit< Impl >::setFetchQueue().

◆ fromFetch

template<class Impl >

TimeBuffer<FetchStruct>::wire DefaultCommit< Impl >::fromFetch

private

Definition at line 342 of file commit.hh.

Referenced by DefaultCommit< Impl >::setFetchQueue().

◆ fromIEW

template<class Impl >

TimeBuffer<IEWStruct>::wire DefaultCommit< Impl >::fromIEW

private

Wire to read information from IEW queue.

Definition at line 348 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::markCompletedInsts(), and DefaultCommit< Impl >::setIEWQueue().

◆ fromRename

template<class Impl >

TimeBuffer<RenameStruct>::wire DefaultCommit< Impl >::fromRename

private

Wire to read information from rename queue.

Definition at line 354 of file commit.hh.

Referenced by DefaultCommit< Impl >::getInsts(), and DefaultCommit< Impl >::setRenameQueue().

◆ iewQueue

template<class Impl >

TimeBuffer<IEWStruct>* DefaultCommit< Impl >::iewQueue

private

IEW instruction queue interface.

Definition at line 345 of file commit.hh.

Referenced by DefaultCommit< Impl >::setIEWQueue().

◆ iewStage

template<class Impl >

IEW* DefaultCommit< Impl >::iewStage

The pointer to the IEW stage.

Used solely to ensure that various events (traps, interrupts, syscalls) do not occur until all stores have written back.

Definition at line 176 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::commitHead(), and DefaultCommit< Impl >::setIEWStage().

◆ iewToCommitDelay

template<class Impl >

const Cycles DefaultCommit< Impl >::iewToCommitDelay

private

IEW to Commit delay.

Definition at line 396 of file commit.hh.

Referenced by DefaultCommit< Impl >::setIEWQueue(), and DefaultCommit< Impl >::setTimeBuffer().

◆ instsCommitted

template<class Impl >

Stats::Vector DefaultCommit< Impl >::instsCommitted

private

Total number of instructions committed.

Definition at line 492 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ interrupt

template<class Impl >

Fault DefaultCommit< Impl >::interrupt

private

The interrupt fault.

Definition at line 438 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::handleInterrupt(), DefaultCommit< Impl >::isDrained(), and DefaultCommit< Impl >::propagateInterrupt().

◆ lastCommitedSeqNum

template<class Impl >

InstSeqNum DefaultCommit< Impl >::lastCommitedSeqNum[Impl::MaxThreads]

private

The sequence number of the last commited instruction.

Definition at line 449 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::squashAll().

◆ numCommittedDist

template<class Impl >

Stats::Distribution DefaultCommit< Impl >::numCommittedDist

private

Distribution of the number of committed instructions each cycle.

Definition at line 489 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regStats().

◆ numRobs

template<class Impl >

unsigned DefaultCommit< Impl >::numRobs

private

Number of Reorder Buffers.

Definition at line 415 of file commit.hh.

◆ numThreads

template<class Impl >

const ThreadID DefaultCommit< Impl >::numThreads

private

Number of Active Threads.

Definition at line 418 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::getCommittingThread(), DefaultCommit< Impl >::isDrained(), DefaultCommit< Impl >::regStats(), DefaultCommit< Impl >::setRenameMap(), DefaultCommit< Impl >::startupStage(), and DefaultCommit< Impl >::takeOverFrom().

◆ opsCommitted

template<class Impl >

Stats::Vector DefaultCommit< Impl >::opsCommitted

private

Total number of ops (including micro ops) committed.

Definition at line 494 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ pc

template<class Impl >

TheISA::PCState DefaultCommit< Impl >::pc[Impl::MaxThreads]

private

The commit PC state of each thread.

Refers to the instruction that is currently being processed/committed.

Definition at line 443 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::instAddr(), DefaultCommit< Impl >::isDrained(), DefaultCommit< Impl >::microPC(), DefaultCommit< Impl >::nextInstAddr(), DefaultCommit< Impl >::pcState(), DefaultCommit< Impl >::squashAll(), DefaultCommit< Impl >::squashFromSquashAfter(), DefaultCommit< Impl >::squashFromTC(), and DefaultCommit< Impl >::squashFromTrap().

◆ ppCommit

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultCommit< Impl >::ppCommit

private

Probe Points.

Definition at line 134 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regProbePoints().

◆ ppCommitStall

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultCommit< Impl >::ppCommitStall

private

Definition at line 135 of file commit.hh.

Referenced by DefaultCommit< Impl >::regProbePoints(), and DefaultCommit< Impl >::tick().

◆ ppSquash

template<class Impl >

ProbePointArg<DynInstPtr>* DefaultCommit< Impl >::ppSquash

private

To probe when an instruction is squashed.

Definition at line 137 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regProbePoints().

◆ priority_list

template<class Impl >

std::list<ThreadID> DefaultCommit< Impl >::priority_list

private

Priority List used for Commit Policy.

Definition at line 393 of file commit.hh.

Referenced by DefaultCommit< Impl >::deactivateThread(), DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::roundRobin().

◆ renameMap

template<class Impl >

RenameMap* DefaultCommit< Impl >::renameMap[Impl::MaxThreads]

private

Rename map interface.

Definition at line 465 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitHead(), DefaultCommit< Impl >::DefaultCommit(), and DefaultCommit< Impl >::setRenameMap().

◆ renameQueue

template<class Impl >

TimeBuffer<RenameStruct>* DefaultCommit< Impl >::renameQueue

private

Rename instruction queue interface, for ROB.

Definition at line 351 of file commit.hh.

Referenced by DefaultCommit< Impl >::setRenameQueue().

◆ renameToROBDelay

template<class Impl >

const Cycles DefaultCommit< Impl >::renameToROBDelay

private

Rename to ROB delay.

Definition at line 402 of file commit.hh.

Referenced by DefaultCommit< Impl >::setRenameQueue().

◆ renameWidth

template<class Impl >

const unsigned DefaultCommit< Impl >::renameWidth

private

Rename width, in instructions.

Used so ROB knows how many instructions to get from the rename instruction queue.

Definition at line 409 of file commit.hh.

Referenced by DefaultCommit< Impl >::getInsts().

◆ rob

template<class Impl >

ROB* DefaultCommit< Impl >::rob

ROB interface.

Definition at line 358 of file commit.hh.

◆ robInfoFromIEW

template<class Impl >

TimeBuffer<TimeStruct>::wire DefaultCommit< Impl >::robInfoFromIEW

private

Wire to read information from IEW (for ROB).

Definition at line 338 of file commit.hh.

Referenced by DefaultCommit< Impl >::setTimeBuffer().

◆ squashAfterInst

template<class Impl >

DynInstPtr DefaultCommit< Impl >::squashAfterInst[Impl::MaxThreads]

private

Instruction passed to squashAfter().

The squash after implementation needs to buffer the instruction that caused a squash since this needs to be passed to the fetch stage once squashing starts.

Definition at line 390 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::squashAfter(), DefaultCommit< Impl >::squashFromSquashAfter(), and DefaultCommit< Impl >::takeOverFrom().

◆ statComAmos

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComAmos

private

Stat for the total number of committed atomics.

Definition at line 502 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComBranches

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComBranches

private

Total number of committed branches.

Definition at line 506 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComFloating

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComFloating

private

Total number of floating point instructions.

Definition at line 510 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComFunctionCalls

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComFunctionCalls

private

Total number of function calls.

Definition at line 514 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComInteger

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComInteger

private

Total number of integer instructions.

Definition at line 512 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComLoads

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComLoads

private

Stat for the total number of committed loads.

Definition at line 500 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComMembars

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComMembars

private

Total number of committed memory barriers.

Definition at line 504 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statCommittedInstType

template<class Impl >

Stats::Vector2d DefaultCommit< Impl >::statCommittedInstType

private

Committed instructions by instruction type (OpClass)

Definition at line 516 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitInsts(), and DefaultCommit< Impl >::regStats().

◆ statComRefs

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComRefs

private

Stat for the total number of committed memory references.

Definition at line 498 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ statComSwp

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComSwp

private

Total number of software prefetches committed.

Definition at line 496 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats().

◆ statComVector

template<class Impl >

Stats::Vector DefaultCommit< Impl >::statComVector

private

Total number of vector instructions.

Definition at line 508 of file commit.hh.

Referenced by DefaultCommit< Impl >::regStats(), and DefaultCommit< Impl >::updateComInstStats().

◆ tcSquash

template<class Impl >

bool DefaultCommit< Impl >::tcSquash[Impl::MaxThreads]

private

Records if a thread has to squash this cycle due to an XC write.

Definition at line 381 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::generateTCEvent(), DefaultCommit< Impl >::propagateInterrupt(), DefaultCommit< Impl >::squashFromTC(), and DefaultCommit< Impl >::takeOverFrom().

◆ thread

template<class Impl >

std::vector<Thread *> DefaultCommit< Impl >::thread

private

Vector of all of the threads.

Definition at line 365 of file commit.hh.

Referenced by DefaultCommit< Impl >::commitHead(), DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::generateTrapEvent(), DefaultCommit< Impl >::handleInterrupt(), DefaultCommit< Impl >::setThreads(), DefaultCommit< Impl >::squashFromTC(), and DefaultCommit< Impl >::squashFromTrap().

◆ timeBuffer

template<class Impl >

TimeBuffer<TimeStruct>* DefaultCommit< Impl >::timeBuffer

private

Time buffer interface.

Definition at line 332 of file commit.hh.

Referenced by DefaultCommit< Impl >::setTimeBuffer().

◆ toIEW

template<class Impl >

TimeBuffer<TimeStruct>::wire DefaultCommit< Impl >::toIEW

private

Wire to write information heading to previous stages.

Definition at line 335 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::commitHead(), DefaultCommit< Impl >::commitInsts(), DefaultCommit< Impl >::handleInterrupt(), DefaultCommit< Impl >::propagateInterrupt(), DefaultCommit< Impl >::setTimeBuffer(), DefaultCommit< Impl >::squashAll(), DefaultCommit< Impl >::squashFromSquashAfter(), DefaultCommit< Impl >::startupStage(), and DefaultCommit< Impl >::tick().

◆ trapInFlight

template<class Impl >

bool DefaultCommit< Impl >::trapInFlight[Impl::MaxThreads]

private

Records if there is a trap currently in flight.

Definition at line 452 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::generateTCEvent(), DefaultCommit< Impl >::generateTrapEvent(), and DefaultCommit< Impl >::squashFromTrap().

◆ trapLatency

template<class Impl >

const Cycles DefaultCommit< Impl >::trapLatency

private

The latency to handle a trap.

Used when scheduling trap squash event.

Definition at line 435 of file commit.hh.

Referenced by DefaultCommit< Impl >::generateTrapEvent().

◆ trapSquash

template<class Impl >

bool DefaultCommit< Impl >::trapSquash[Impl::MaxThreads]

private

Records if a thread has to squash this cycle due to a trap.

Definition at line 378 of file commit.hh.

Referenced by DefaultCommit< Impl >::clearStates(), DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::propagateInterrupt(), DefaultCommit< Impl >::squashFromTrap(), and DefaultCommit< Impl >::takeOverFrom().

◆ wroteToTimeBuffer

template<class Impl >

bool DefaultCommit< Impl >::wroteToTimeBuffer

private

Records that commit has written to the time buffer this cycle.

Used for the CPU to determine if it can deschedule itself if there is no activity.

Definition at line 370 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), and DefaultCommit< Impl >::tick().

◆ youngestSeqNum

template<class Impl >

InstSeqNum DefaultCommit< Impl >::youngestSeqNum[Impl::MaxThreads]

private

The sequence number of the youngest valid instruction in the ROB.

Definition at line 446 of file commit.hh.

Referenced by DefaultCommit< Impl >::commit(), DefaultCommit< Impl >::DefaultCommit(), DefaultCommit< Impl >::getInsts(), and DefaultCommit< Impl >::squashAll().

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

cpu/o3/commit.hh
cpu/o3/commit_impl.hh

Public Types

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

template<class Impl> class DefaultCommit< Impl >

Member Typedef Documentation

◆ CPUPol

◆ DynInstPtr

◆ Fetch

◆ FetchStruct

◆ IEW

◆ IEWStruct

◆ O3CPU

◆ RenameMap

◆ RenameStruct

◆ ROB

◆ Thread

◆ TimeStruct

Member Enumeration Documentation

◆ CommitStatus

◆ ThreadStatus

Constructor & Destructor Documentation

◆ DefaultCommit()

Member Function Documentation

◆ changedROBEntries()

◆ clearStates()

◆ commit()

◆ commitHead()

◆ commitInsts()

◆ deactivateThread()

◆ drain()

◆ drainResume()

◆ drainSanityCheck()

◆ generateTCEvent()

◆ generateTrapEvent()

◆ getCommittingThread()

◆ getInsts()

◆ handleInterrupt()

◆ instAddr()

◆ isDrained()

◆ markCompletedInsts()

◆ microPC()

◆ name()

◆ nextInstAddr()

◆ numROBFreeEntries()

◆ oldestReady()

◆ pcState() [1/2]

◆ pcState() [2/2]

◆ processTrapEvent()

◆ propagateInterrupt()

◆ regProbePoints()

◆ regStats()

◆ roundRobin()

◆ setActiveThreads()

◆ setFetchQueue()

◆ setIEWQueue()

◆ setIEWStage()

◆ setRenameMap()

◆ setRenameQueue()

◆ setROB()

◆ setThreads()

◆ setTimeBuffer()

◆ squashAfter()

◆ squashAll()

◆ squashFromSquashAfter()

◆ squashFromTC()

◆ squashFromTrap()

◆ startupStage()

◆ takeOverFrom()

◆ tick()

◆ updateComInstStats()

◆ updateStatus()

Member Data Documentation

◆ _nextStatus

◆ _status

◆ activeThreads

◆ avoidQuiesceLiveLock

◆ branchMispredicts

template<class Impl>
class DefaultCommit< Impl >