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

#include <tlb_coalescer.hh>

Inheritance diagram for TLBCoalescer:

Classes
class	CleanupEvent

class	CpuSidePort

class	IssueProbeEvent

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 MemObject
typedef MemObjectParams	Params

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 ()
	Register statistics for this object. More...

Tick	frequency () const

Tick	ticks (int numCycles) const

Tick	curCycle () const

Tick	tickToCycles (Tick val) const

BaseMasterPort &	getMasterPort (const std::string &if_name, PortID idx)
	Get a master port with a given name and index. More...

BaseSlavePort &	getSlavePort (const std::string &if_name, PortID idx)
	Get a slave port with a given name and index. More...

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

	MemObject (const Params *params)

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)

void	regStats () override
	Register statistics for this object. More...

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	resetStats ()
	Reset statistics associated with this object. 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 Clocked
void	updateClockPeriod () const
	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

Protected Attributes
int	clock

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

Tick	prvEvalTick

Stats::Scalar	numPwrStateTransitions

Stats::Distribution	pwrStateClkGateDist

Stats::Vector	pwrStateResidencyTicks

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...

Detailed Description

The TLBCoalescer is a MemObject 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

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

Definition at line 91 of file tlb_coalescer.hh.

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

Definition at line 110 of file tlb_coalescer.hh.

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

Definition at line 123 of file tlb_coalescer.hh.

typedef TLBCoalescerParams TLBCoalescer::Params

Definition at line 78 of file tlb_coalescer.hh.

Constructor & Destructor Documentation

TLBCoalescer::TLBCoalescer ( const Params * p )

Definition at line 42 of file tlb_coalescer.cc.

References cpuSidePort, csprintf(), ArmISA::i, memSidePort, and SimObject::name().

TLBCoalescer::~TLBCoalescer ( )

inline

Definition at line 80 of file tlb_coalescer.hh.

Member Function Documentation

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

Definition at line 96 of file tlb_coalescer.cc.

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

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().

Tick TLBCoalescer::curCycle ( ) const

inline

Definition at line 152 of file tlb_coalescer.hh.

References clock, and curTick().

Tick TLBCoalescer::frequency ( ) const

inline

Definition at line 150 of file tlb_coalescer.hh.

References clock, and SimClock::Frequency.

BaseMasterPort & TLBCoalescer::getMasterPort	(	const std::string &	if_name,
		PortID	idx
	)

virtual

Get a master port with a given name and index.

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

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from MemObject.

Definition at line 76 of file tlb_coalescer.cc.

References memSidePort, and panic.

BaseSlavePort & TLBCoalescer::getSlavePort	(	const std::string &	if_name,
		PortID	idx
	)

virtual

Get a slave port with a given name and index.

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

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from MemObject.

Definition at line 62 of file tlb_coalescer.cc.

References cpuSidePort, and panic.

void TLBCoalescer::regStats ( )

virtual

Register statistics for this object.

Reimplemented from SimObject.

Definition at line 547 of file tlb_coalescer.cc.

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

Tick TLBCoalescer::ticks ( int numCycles ) const

inline

Definition at line 151 of file tlb_coalescer.hh.

References clock.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().

Tick TLBCoalescer::tickToCycles ( Tick val ) const

inline

Definition at line 153 of file tlb_coalescer.hh.

References clock.

void TLBCoalescer::updatePhysAddresses ( PacketPtr pkt )

Member Data Documentation

CleanupEvent TLBCoalescer::cleanupEvent

Definition at line 245 of file tlb_coalescer.hh.

Referenced by updatePhysAddresses().

std::queue<Addr> TLBCoalescer::cleanupQueue

Definition at line 249 of file tlb_coalescer.hh.

Referenced by updatePhysAddresses().

int TLBCoalescer::clock

protected

Definition at line 75 of file tlb_coalescer.hh.

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

Stats::Scalar TLBCoalescer::coalescedAccesses

Definition at line 130 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().

CoalescingFIFO TLBCoalescer::coalescerFIFO

Definition at line 112 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().

int TLBCoalescer::coalescingWindow

Definition at line 87 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().

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

Definition at line 210 of file tlb_coalescer.hh.

Referenced by getSlavePort(), and TLBCoalescer().

bool TLBCoalescer::disableCoalescing

Definition at line 94 of file tlb_coalescer.hh.

Referenced by canCoalesce().

CoalescingTable TLBCoalescer::issuedTranslationsTable

Definition at line 125 of file tlb_coalescer.hh.

Referenced by updatePhysAddresses().

Stats::Formula TLBCoalescer::localLatency

Definition at line 142 of file tlb_coalescer.hh.

Referenced by regStats().

Stats::Scalar TLBCoalescer::localqueuingCycles

Definition at line 140 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().

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

Definition at line 212 of file tlb_coalescer.hh.

Referenced by getMasterPort(), and TLBCoalescer().

IssueProbeEvent TLBCoalescer::probeTLBEvent

Definition at line 229 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().

Stats::Scalar TLBCoalescer::queuingCycles

Definition at line 135 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().

int TLBCoalescer::TLBProbesPerCycle

Definition at line 83 of file tlb_coalescer.hh.

Stats::Scalar TLBCoalescer::uncoalescedAccesses

Definition at line 128 of file tlb_coalescer.hh.

Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().

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

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

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

IssueProbeEvent	probeTLBEvent

CleanupEvent	cleanupEvent

std::queue< Addr >	cleanupQueue

Classes

Public Types

Public Member Functions

Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation