The TLBCoalescer is a ClockedObject sitting on the front side (CPUSide) of each TLB. More...

#include <tlb_coalescer.hh>

Inheritance diagram for TLBCoalescer:

Classes
class	CpuSidePort

class	MemSidePort

Public Types
typedef TLBCoalescerParams	Params

typedef std::vector< PacketPtr >	coalescedReq

typedef std::unordered_map< int64_t, std::vector< coalescedReq > >	CoalescingFIFO

typedef std::unordered_map< Addr, coalescedReq >	CoalescingTable

Public Types inherited from ClockedObject
typedef ClockedObjectParams	Params
	Parameters of ClockedObject. More...

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	TLBCoalescer (const Params *p)

	~TLBCoalescer ()

bool	canCoalesce (PacketPtr pkt1, PacketPtr pkt2)

void	updatePhysAddresses (PacketPtr pkt)

void	regStats () override
	Callback to set stat parameters. More...

Tick	frequency () const

Tick	ticks (int numCycles) const

Tick	curCycle () const

Tick	tickToCycles (Tick val) const

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

void	processProbeTLBEvent ()

void	processCleanupEvent ()

Public Member Functions inherited from ClockedObject
	ClockedObject (const ClockedObjectParams *p)

const Params *	params () const

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

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

Enums::PwrState	pwrState () const

std::string	pwrStateName () const

std::vector< double >	pwrStateWeights () const
	Returns the percentage residency for each power state. More...

void	computeStats ()
	Record stats values like state residency by computing the time difference from previous update. More...

void	pwrState (Enums::PwrState)

Public Member Functions inherited from SimObject
const Params *	params () const

	SimObject (const Params *_params)

virtual	~SimObject ()

virtual const std::string	name () const

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

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

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

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

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

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

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

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

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

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

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

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

Public Member Functions inherited from EventManager
	EventManager (EventManager &em)

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

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)

void	setCurTick (Tick newVal)

Public Member Functions inherited from Serializable
	Serializable ()

virtual	~Serializable ()

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

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

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

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

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

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

Public Member Functions inherited from Stats::Group
	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

	Group (Group parent, const char name=nullptr)
	Construct a new statistics group. More...

virtual	~Group ()

virtual void	resetStats ()
	Callback to reset stats. More...

virtual void	preDumpStats ()
	Callback before stats are dumped. More...

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

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

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

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

Public Member Functions inherited from Clocked
void	updateClockPeriod ()
	Update the tick to the current tick. More...

Tick	clockEdge (Cycles cycles=Cycles(0)) const
	Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle. More...

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge. More...

Tick	nextCycle () const
	Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future. More...

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Public Attributes
int	TLBProbesPerCycle

int	coalescingWindow

bool	disableCoalescing

CoalescingFIFO	coalescerFIFO

CoalescingTable	issuedTranslationsTable

Stats::Scalar	uncoalescedAccesses

Stats::Scalar	coalescedAccesses

Stats::Scalar	queuingCycles

Stats::Scalar	localqueuingCycles

Stats::Formula	localLatency

std::vector< CpuSidePort * >	cpuSidePort

std::vector< MemSidePort * >	memSidePort

EventFunctionWrapper	probeTLBEvent
	This event issues the TLB probes. More...

EventFunctionWrapper	cleanupEvent
	The cleanupEvent is scheduled after a TLBEvent triggers in order to free memory and do the required clean-up. More...

std::queue< Addr >	cleanupQueue

Protected Attributes
int	clock

Protected Attributes inherited from ClockedObject
Enums::PwrState	_currPwrState
	To keep track of the current power state. More...

Tick	prvEvalTick

ClockedObject::ClockedObjectStats	stats

Protected Attributes inherited from SimObject
const SimObjectParams *	_params
	Cached copy of the object parameters. More...

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

Additional Inherited Members
Static Public Member Functions inherited from SimObject
static void	serializeAll (CheckpointOut &cp)
	Serialize all SimObjects in the system. More...

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

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

static void	serializeAll (const std::string &cpt_dir)

static void	unserializeGlobals (CheckpointIn &cp)

Static Public Attributes inherited from Serializable
static int	ckptCount = 0

static int	ckptMaxCount = 0

static int	ckptPrevCount = -1

Protected Member Functions inherited from Drainable
	Drainable ()

virtual	~Drainable ()

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

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

Protected Member Functions inherited from Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters. More...

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance. More...

void	resetClock () const
	Reset the object's clock using the current global tick value. More...

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed. More...

Detailed Description

The TLBCoalescer is a ClockedObject sitting on the front side (CPUSide) of each TLB.

It receives packets and issues coalesced requests to the TLB below it. It controls how requests are coalesced (the rules) and the permitted number of TLB probes per cycle (i.e., how many coalesced requests it feeds the TLB per cycle).

Definition at line 68 of file tlb_coalescer.hh.

Member Typedef Documentation

◆ coalescedReq

typedef std::vector<PacketPtr> TLBCoalescer::coalescedReq

Definition at line 91 of file tlb_coalescer.hh.

◆ CoalescingFIFO

typedef std::unordered_map<int64_t, std::vector<coalescedReq> > TLBCoalescer::CoalescingFIFO

Definition at line 110 of file tlb_coalescer.hh.

◆ CoalescingTable

typedef std::unordered_map<Addr, coalescedReq> TLBCoalescer::CoalescingTable

Definition at line 123 of file tlb_coalescer.hh.

◆ Params

typedef TLBCoalescerParams TLBCoalescer::Params

Definition at line 78 of file tlb_coalescer.hh.

Constructor & Destructor Documentation

◆ TLBCoalescer()

TLBCoalescer::TLBCoalescer ( const Params * p )

Definition at line 44 of file tlb_coalescer.cc.

References cleanupEvent, EventBase::CPU_Tick_Pri, cpuSidePort, csprintf(), ArmISA::i, EventBase::Maximum_Pri, memSidePort, SimObject::name(), MipsISA::p, processCleanupEvent(), and processProbeTLBEvent().

Referenced by regStats().

◆ ~TLBCoalescer()

TLBCoalescer::~TLBCoalescer ( )

inline

Definition at line 80 of file tlb_coalescer.hh.

Member Function Documentation

◆ canCoalesce()

bool TLBCoalescer::canCoalesce	(	PacketPtr	pkt1,
		PacketPtr	pkt2
	)

Definition at line 97 of file tlb_coalescer.cc.

References disableCoalescing, AlphaISA::PageBytes, Packet::req, roundDown(), safe_cast(), and Packet::senderState.

◆ curCycle()

Tick TLBCoalescer::curCycle ( ) const

inline

Definition at line 152 of file tlb_coalescer.hh.

References clock, and curTick().

◆ frequency()

Tick TLBCoalescer::frequency ( ) const

inline

Definition at line 150 of file tlb_coalescer.hh.

References clock, and SimClock::Frequency.

◆ getPort()

Port & TLBCoalescer::getPort	(	const std::string &	if_name,
		PortID	idx = `InvalidPortID`
	)

overridevirtual

Get a port with a given name and index.

This is used at binding time and returns a reference to a protocol-agnostic port.

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from SimObject.

Definition at line 71 of file tlb_coalescer.cc.

References cpuSidePort, memSidePort, and panic.

◆ processCleanupEvent()

void TLBCoalescer::processCleanupEvent ( )

Definition at line 513 of file tlb_coalescer.cc.

References cleanupQueue, DPRINTF, and issuedTranslationsTable.

Referenced by TLBCoalescer().

◆ processProbeTLBEvent()

void TLBCoalescer::processProbeTLBEvent ( )

Definition at line 407 of file tlb_coalescer.cc.

References coalescerFIFO, curTick(), DPRINTF, ArmISA::i, issuedTranslationsTable, localqueuingCycles, memSidePort, SimObject::name(), AlphaISA::PageBytes, queuingCycles, Packet::req, roundDown(), safe_cast(), Packet::senderState, and TLBProbesPerCycle.

Referenced by TLBCoalescer().

◆ regStats()

void TLBCoalescer::regStats ( )

overridevirtual

Callback to set stat parameters.

This callback is typically used for complex stats (e.g., distributions) that need parameters in addition to a name and a description. Stat names and descriptions should typically be set from the constructor usingo from the constructor using the ADD_STAT macro.

Reimplemented from Stats::Group.

Definition at line 526 of file tlb_coalescer.cc.

References coalescedAccesses, Stats::DataWrap< Derived, InfoProxyType >::desc(), localLatency, localqueuingCycles, SimObject::name(), Stats::DataWrap< Derived, InfoProxyType >::name(), queuingCycles, Stats::Group::regStats(), TLBCoalescer(), and uncoalescedAccesses.

◆ ticks()

Tick TLBCoalescer::ticks ( int numCycles ) const

inline

Definition at line 151 of file tlb_coalescer.hh.

◆ tickToCycles()

Tick TLBCoalescer::tickToCycles ( Tick val ) const

inline

Definition at line 153 of file tlb_coalescer.hh.

References clock.

◆ updatePhysAddresses()

void TLBCoalescer::updatePhysAddresses ( PacketPtr pkt )

Definition at line 142 of file tlb_coalescer.cc.

References cleanupEvent, cleanupQueue, curTick(), DPRINTF, ArmISA::i, Packet::isRequest(), issuedTranslationsTable, Packet::makeTimingResponse(), MipsISA::p, AlphaISA::PageBytes, Packet::req, roundDown(), safe_cast(), EventManager::schedule(), Event::scheduled(), Packet::senderState, SlavePort::sendTimingResp(), and Request::UNCACHEABLE.

Member Data Documentation

◆ cleanupEvent

EventFunctionWrapper TLBCoalescer::cleanupEvent

The cleanupEvent is scheduled after a TLBEvent triggers in order to free memory and do the required clean-up.

Definition at line 224 of file tlb_coalescer.hh.

Referenced by TLBCoalescer(), and updatePhysAddresses().

◆ cleanupQueue

std::queue<Addr> TLBCoalescer::cleanupQueue

Definition at line 228 of file tlb_coalescer.hh.

Referenced by processCleanupEvent(), and updatePhysAddresses().

◆ clock

int TLBCoalescer::clock

protected

Definition at line 75 of file tlb_coalescer.hh.

Referenced by curCycle(), frequency(), and tickToCycles().

◆ coalescedAccesses

Stats::Scalar TLBCoalescer::coalescedAccesses

Definition at line 130 of file tlb_coalescer.hh.

Referenced by regStats().

◆ coalescerFIFO

CoalescingFIFO TLBCoalescer::coalescerFIFO

Definition at line 112 of file tlb_coalescer.hh.

Referenced by processProbeTLBEvent().

◆ coalescingWindow

int TLBCoalescer::coalescingWindow

Definition at line 87 of file tlb_coalescer.hh.

◆ cpuSidePort

std::vector<CpuSidePort*> TLBCoalescer::cpuSidePort

Definition at line 210 of file tlb_coalescer.hh.

Referenced by getPort(), and TLBCoalescer().

◆ disableCoalescing

bool TLBCoalescer::disableCoalescing

Definition at line 94 of file tlb_coalescer.hh.

Referenced by canCoalesce().

◆ issuedTranslationsTable

CoalescingTable TLBCoalescer::issuedTranslationsTable

Definition at line 125 of file tlb_coalescer.hh.

Referenced by processCleanupEvent(), processProbeTLBEvent(), and updatePhysAddresses().

◆ localLatency

Stats::Formula TLBCoalescer::localLatency

Definition at line 142 of file tlb_coalescer.hh.

Referenced by regStats().

◆ localqueuingCycles

Stats::Scalar TLBCoalescer::localqueuingCycles

Definition at line 140 of file tlb_coalescer.hh.

Referenced by processProbeTLBEvent(), and regStats().

◆ memSidePort

std::vector<MemSidePort*> TLBCoalescer::memSidePort

Definition at line 212 of file tlb_coalescer.hh.

Referenced by getPort(), processProbeTLBEvent(), and TLBCoalescer().

◆ probeTLBEvent

EventFunctionWrapper TLBCoalescer::probeTLBEvent

This event issues the TLB probes.

Definition at line 219 of file tlb_coalescer.hh.

◆ queuingCycles

Stats::Scalar TLBCoalescer::queuingCycles

Definition at line 135 of file tlb_coalescer.hh.

Referenced by processProbeTLBEvent(), and regStats().

◆ TLBProbesPerCycle

int TLBCoalescer::TLBProbesPerCycle

Definition at line 83 of file tlb_coalescer.hh.

Referenced by processProbeTLBEvent().

◆ uncoalescedAccesses

Stats::Scalar TLBCoalescer::uncoalescedAccesses

Definition at line 128 of file tlb_coalescer.hh.

Referenced by regStats().

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

gpu-compute/tlb_coalescer.hh
gpu-compute/tlb_coalescer.cc

Classes

Public Types

Public Member Functions

Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ coalescedReq

◆ CoalescingFIFO

◆ CoalescingTable

◆ Params

Constructor & Destructor Documentation

◆ TLBCoalescer()

◆ ~TLBCoalescer()

Member Function Documentation

◆ canCoalesce()

◆ curCycle()

◆ frequency()

◆ getPort()

◆ processCleanupEvent()

◆ processProbeTLBEvent()

◆ regStats()

◆ ticks()

◆ tickToCycles()

◆ updatePhysAddresses()

Member Data Documentation

◆ cleanupEvent

◆ cleanupQueue

◆ clock

◆ coalescedAccesses

◆ coalescerFIFO

◆ coalescingWindow

◆ cpuSidePort

◆ disableCoalescing

◆ issuedTranslationsTable

◆ localLatency

◆ localqueuingCycles

◆ memSidePort

◆ probeTLBEvent

◆ queuingCycles

◆ TLBProbesPerCycle

◆ uncoalescedAccesses