The qos::MemCtrl is a base class for Memory objects which support QoS - it provides access to a set of QoS scheduling policies. More...

#include <mem_ctrl.hh>

Inheritance diagram for gem5::memory::qos::MemCtrl:

Classes
struct	MemCtrlStats

Public Types
enum	BusState { READ, WRITE }
	Bus Direction. More...

Public Types inherited from gem5::ClockedObject
using	Params = ClockedObjectParams
	Parameters of ClockedObject. More...

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Public Member Functions
	MemCtrl (const QoSMemCtrlParams &)
	QoS Memory base class. More...

virtual	~MemCtrl ()

BusState	getBusState () const
	Gets the current bus state. More...

BusState	getBusStateNext () const
	Gets the next bus state. More...

bool	hasRequestor (RequestorID id) const
	hasRequestor returns true if the selected requestor(ID) has been registered in the memory controller, which happens if the memory controller has received at least a packet from that requestor. More...

uint64_t	getReadQueueSize (const uint8_t prio) const
	Gets a READ queue size. More...

uint64_t	getWriteQueueSize (const uint8_t prio) const
	Gets a WRITE queue size. More...

uint64_t	getTotalReadQueueSize () const
	Gets the total combined READ queues size. More...

uint64_t	getTotalWriteQueueSize () const
	Gets the total combined WRITE queues size. More...

Tick	getServiceTick (const uint8_t prio) const
	Gets the last service tick related to a QoS Priority. More...

uint8_t	numPriorities () const
	Gets the total number of priority levels in the QoS memory controller. More...

System *	system () const
	read the system pointer More...

Public Member Functions inherited from gem5::ClockedObject
	ClockedObject (const ClockedObjectParams &p)

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

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

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

void	setCurTick (Tick newVal)

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

	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. 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 gem5::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 gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group. More...

virtual	~Group ()

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

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

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

void	addStat (statistics::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...

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

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

	Group ()=delete

	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

Public Member Functions inherited from gem5::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

Protected Member Functions
void	addRequestor (const RequestorID id)
	Initializes dynamically counters and statistics for a given Requestor. More...

void	logRequest (BusState dir, RequestorID id, uint8_t _qos, Addr addr, uint64_t entries)
	Called upon receiving a request or updates statistics and updates queues status. More...

void	logResponse (BusState dir, RequestorID id, uint8_t _qos, Addr addr, uint64_t entries, double delay)
	Called upon receiving a response, updates statistics and updates queues status. More...

template<typename Queues >
uint8_t	qosSchedule (std::initializer_list< Queues * > queues_ptr, uint64_t queue_entry_size, const PacketPtr pkt)
	Assign priority to a packet by executing the configured QoS policy. More...

uint8_t	schedule (RequestorID id, uint64_t data)

uint8_t	schedule (const PacketPtr pkt)

BusState	selectNextBusState ()
	Returns next bus direction (READ or WRITE) based on configured policy. More...

void	setCurrentBusState ()
	Set current bus direction (READ or WRITE) from next selected one. More...

void	recordTurnaroundStats ()
	Record statistics on turnarounds based on busStateNext and busState values. More...

template<typename Queues >
void	escalate (std::initializer_list< Queues * > queues, uint64_t queue_entry_size, RequestorID id, uint8_t tgt_prio)
	Escalates/demotes priority of all packets belonging to the passed requestor to given priority value. More...

template<typename Queues >
void	escalateQueues (Queues &queues, uint64_t queue_entry_size, RequestorID id, uint8_t curr_prio, uint8_t tgt_prio)
	Escalates/demotes priority of all packets belonging to the passed requestor to given priority value in a specified cluster of queues (e.g. More...

Protected Member Functions inherited from gem5::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 gem5::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...

Protected Attributes
const std::unique_ptr< Policy >	policy
	QoS Policy, assigns QoS priority to the incoming packets. More...

const std::unique_ptr< TurnaroundPolicy >	turnPolicy
	QoS Bus Turnaround Policy: selects the bus direction (READ/WRITE) More...

const std::unique_ptr< QueuePolicy >	queuePolicy
	QoS Queue Policy: selects packet among same-priority queue. More...

const uint8_t	_numPriorities
	Number of configured QoS priorities. More...

const bool	qosPriorityEscalation
	Enables QoS priority escalation. More...

const bool	qosSyncroScheduler
	Enables QoS synchronized scheduling invokes the QoS scheduler on all requestors, at every packet arrival. More...

std::unordered_map< RequestorID, const std::string >	requestors
	Hash of requestor ID - requestor name. More...

std::unordered_map< RequestorID, std::vector< uint64_t > >	packetPriorities
	Hash of requestors - number of packets queued per priority. More...

std::unordered_map< RequestorID, std::unordered_map< uint64_t, std::deque< uint64_t > > >	requestTimes
	Hash of requestors - address of request - queue of times of request. More...

std::vector< Tick >	serviceTick
	Vector of QoS priorities/last service time. More...

std::vector< uint64_t >	readQueueSizes
	Read request packets queue length in #packets, per QoS priority. More...

std::vector< uint64_t >	writeQueueSizes
	Write request packets queue length in #packets, per QoS priority. More...

uint64_t	totalReadQueueSize
	Total read request packets queue length in #packets. More...

uint64_t	totalWriteQueueSize
	Total write request packets queue length in #packets. More...

BusState	busState
	Bus state used to control the read/write switching and drive the scheduling of the next request. More...

BusState	busStateNext
	bus state for next request event triggered More...

gem5::memory::qos::MemCtrl::MemCtrlStats	stats

System *	_system
	Pointer to the System object. More...

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

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

Additional Inherited Members
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. More...

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

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

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

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

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

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Detailed Description

The qos::MemCtrl is a base class for Memory objects which support QoS - it provides access to a set of QoS scheduling policies.

Definition at line 80 of file mem_ctrl.hh.

Member Enumeration Documentation

◆ BusState

enum gem5::memory::qos::MemCtrl::BusState

Bus Direction.

Enumerator
READ
WRITE

Definition at line 84 of file mem_ctrl.hh.

Constructor & Destructor Documentation

◆ MemCtrl()

gem5::memory::qos::MemCtrl::MemCtrl ( const QoSMemCtrlParams & p )

QoS Memory base class.

Parameters

p	pointer to QoSMemCtrl parameters

Definition at line 55 of file mem_ctrl.cc.

References _numPriorities, policy, queuePolicy, readQueueSizes, serviceTick, turnPolicy, and writeQueueSizes.

◆ ~MemCtrl()

gem5::memory::qos::MemCtrl::~MemCtrl ( )

virtual

Definition at line 88 of file mem_ctrl.cc.

Member Function Documentation

◆ addRequestor()

void gem5::memory::qos::MemCtrl::addRequestor ( const RequestorID id )

protected

Initializes dynamically counters and statistics for a given Requestor.

Parameters

id	the requestor's ID

Definition at line 275 of file mem_ctrl.cc.

References _system, DPRINTF, gem5::System::getRequestorName(), hasRequestor(), gem5::ArmISA::id, numPriorities(), packetPriorities, and requestors.

Referenced by escalate(), and logRequest().

◆ escalate()

template<typename Queues >

void gem5::memory::qos::MemCtrl::escalate	(	std::initializer_list< Queues * >	queues,
		uint64_t	queue_entry_size,
		RequestorID	id,
		uint8_t	tgt_prio
	)

protected

Escalates/demotes priority of all packets belonging to the passed requestor to given priority value.

Parameters

queues	list of pointers to packet queues
queue_entry_size	size of an entry in the queue
id	requestor whose packets priority will change
tgt_prio	target priority value

Definition at line 448 of file mem_ctrl.hh.

References addRequestor(), DPRINTF, escalateQueues(), numPriorities(), packetPriorities, gem5::ArmISA::q, readQueueSizes, requestors, and writeQueueSizes.

Referenced by qosSchedule().

◆ escalateQueues()

template<typename Queues >

void gem5::memory::qos::MemCtrl::escalateQueues	(	Queues &	queues,
		uint64_t	queue_entry_size,
		RequestorID	id,
		uint8_t	curr_prio,
		uint8_t	tgt_prio
	)

protected

Escalates/demotes priority of all packets belonging to the passed requestor to given priority value in a specified cluster of queues (e.g.

read queues or write queues) which is passed as an argument to the function. The curr_prio/tgt_prio parameters are queue selectors in the queue cluster.

Parameters

queues	reference to packet queues
queue_entry_size	size of an entry in the queue
id	requestor whose packets priority will change
curr_prio	source queue priority value
tgt_prio	target queue priority value

Definition at line 376 of file mem_ctrl.hh.

References gem5::divCeil(), DPRINTF, gem5::ArmISA::id, packetPriorities, panic_if, readQueueSizes, requestors, and writeQueueSizes.

Referenced by escalate().

◆ getBusState()

BusState gem5::memory::qos::MemCtrl::getBusState ( ) const

inline

Gets the current bus state.

Returns: current bus state

Definition at line 297 of file mem_ctrl.hh.

References busState.

Referenced by gem5::memory::qos::TurnaroundPolicyIdeal::selectBusState(), and selectNextBusState().

◆ getBusStateNext()

BusState gem5::memory::qos::MemCtrl::getBusStateNext ( ) const

inline

Gets the next bus state.

Returns: next bus state

Definition at line 304 of file mem_ctrl.hh.

References busStateNext.

◆ getReadQueueSize()

uint64_t gem5::memory::qos::MemCtrl::getReadQueueSize ( const uint8_t prio ) const

inline

Gets a READ queue size.

Parameters

prio	QoS Priority of the queue

Returns: queue size in packets

Definition at line 327 of file mem_ctrl.hh.

References readQueueSizes.

Referenced by gem5::memory::qos::TurnaroundPolicyIdeal::selectBusState().

◆ getServiceTick()

Tick gem5::memory::qos::MemCtrl::getServiceTick ( const uint8_t prio ) const

inline

Gets the last service tick related to a QoS Priority.

Parameters

prio	QoS Priority

Returns: tick

Definition at line 359 of file mem_ctrl.hh.

References serviceTick.

◆ getTotalReadQueueSize()

uint64_t gem5::memory::qos::MemCtrl::getTotalReadQueueSize ( ) const

inline

Gets the total combined READ queues size.

Returns: total queues size in packets

Definition at line 344 of file mem_ctrl.hh.

References totalReadQueueSize.

Referenced by selectNextBusState().

◆ getTotalWriteQueueSize()

uint64_t gem5::memory::qos::MemCtrl::getTotalWriteQueueSize ( ) const

inline

Gets the total combined WRITE queues size.

Returns: total queues size in packets

Definition at line 351 of file mem_ctrl.hh.

References totalWriteQueueSize.

Referenced by selectNextBusState().

◆ getWriteQueueSize()

uint64_t gem5::memory::qos::MemCtrl::getWriteQueueSize ( const uint8_t prio ) const

inline

Gets a WRITE queue size.

Parameters

prio	QoS Priority of the queue

Returns: queue size in packets

Definition at line 336 of file mem_ctrl.hh.

References writeQueueSizes.

Referenced by gem5::memory::qos::TurnaroundPolicyIdeal::selectBusState().

◆ hasRequestor()

bool gem5::memory::qos::MemCtrl::hasRequestor ( RequestorID id ) const

inline

hasRequestor returns true if the selected requestor(ID) has been registered in the memory controller, which happens if the memory controller has received at least a packet from that requestor.

Parameters

id	requestor id to lookup

Returns: true if the memory controller has received a packet from the requestor, false otherwise.

Definition at line 316 of file mem_ctrl.hh.

References requestors.

Referenced by addRequestor(), gem5::memory::qos::LrgQueuePolicy::enqueuePacket(), logResponse(), and gem5::memory::qos::LrgQueuePolicy::selectPacket().

◆ logRequest()

void gem5::memory::qos::MemCtrl::logRequest	(	BusState	dir,
		RequestorID	id,
		uint8_t	_qos,
		Addr	addr,
		uint64_t	entries
	)

protected

Called upon receiving a request or updates statistics and updates queues status.

Parameters

dir	request direction
id	requestor id
_qos	packet QoS value
addr	packet address
entries	number of entries to record

Definition at line 92 of file mem_ctrl.cc.

References gem5::X86ISA::addr, addRequestor(), gem5::memory::qos::MemCtrl::MemCtrlStats::avgPriority, gem5::memory::qos::MemCtrl::MemCtrlStats::avgPriorityDistance, gem5::curTick(), DPRINTF, gem5::ArmISA::i, gem5::ArmISA::id, gem5::ArmISA::j, packetPriorities, READ, readQueueSizes, requestors, requestTimes, stats, totalReadQueueSize, totalWriteQueueSize, WRITE, and writeQueueSizes.

Referenced by gem5::memory::MemCtrl::addToReadQueue(), gem5::memory::MemCtrl::addToWriteQueue(), and gem5::memory::qos::MemSinkCtrl::recvTimingReq().

◆ logResponse()

void gem5::memory::qos::MemCtrl::logResponse	(	BusState	dir,
		RequestorID	id,
		uint8_t	_qos,
		Addr	addr,
		uint64_t	entries,
		double	delay
	)

protected

Called upon receiving a response, updates statistics and updates queues status.

Parameters

dir	response direction
id	requestor id
_qos	packet QoS value
addr	packet address
entries	number of entries to record
delay	response delay

Definition at line 149 of file mem_ctrl.cc.

References gem5::X86ISA::addr, gem5::curTick(), DPRINTF, hasRequestor(), gem5::ArmISA::id, gem5::ArmISA::j, packetPriorities, panic_if, gem5::memory::qos::MemCtrl::MemCtrlStats::priorityMaxLatency, gem5::memory::qos::MemCtrl::MemCtrlStats::priorityMinLatency, READ, readQueueSizes, requestors, requestTimes, gem5::sim_clock::as_float::s, stats, totalReadQueueSize, totalWriteQueueSize, gem5::statistics::VectorBase< Derived, Stor >::value(), WRITE, and writeQueueSizes.

Referenced by gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), and gem5::memory::MemCtrl::processNextReqEvent().

◆ numPriorities()

uint8_t gem5::memory::qos::MemCtrl::numPriorities ( ) const

inline

Gets the total number of priority levels in the QoS memory controller.

Returns: total number of priority levels

Definition at line 367 of file mem_ctrl.hh.

References _numPriorities.

Referenced by addRequestor(), gem5::memory::DRAMInterface::doBurstAccess(), escalate(), gem5::memory::qos::PropFairPolicy::initRequestor(), gem5::memory::qos::MemSinkCtrl::MemSinkCtrl(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), qosSchedule(), and gem5::memory::qos::TurnaroundPolicyIdeal::selectBusState().

◆ qosSchedule()

template<typename Queues >

uint8_t gem5::memory::qos::MemCtrl::qosSchedule	(	std::initializer_list< Queues * >	queues_ptr,
		uint64_t	queue_entry_size,
		const PacketPtr	pkt
	)

protected

Assign priority to a packet by executing the configured QoS policy.

Parameters

queues_ptr	list of pointers to packet queues
queue_entry_size	size in bytes per each packet in the queue
pkt	pointer to the Packet

Returns: a QoS priority value

Definition at line 496 of file mem_ctrl.hh.

References _system, gem5::curTick(), DPRINTF, escalate(), gem5::System::getRequestorName(), numPriorities(), qosPriorityEscalation, qosSyncroScheduler, gem5::Packet::qosValue(), gem5::Packet::requestorId(), requestors, schedule(), and serviceTick.

Referenced by gem5::memory::qos::MemSinkCtrl::recvTimingReq(), and gem5::memory::MemCtrl::recvTimingReq().

◆ recordTurnaroundStats()

void gem5::memory::qos::MemCtrl::recordTurnaroundStats ( )

protected

Record statistics on turnarounds based on busStateNext and busState values.

Definition at line 359 of file mem_ctrl.cc.

References busState, busStateNext, gem5::memory::qos::MemCtrl::MemCtrlStats::numReadWriteTurnArounds, gem5::memory::qos::MemCtrl::MemCtrlStats::numStayReadState, gem5::memory::qos::MemCtrl::MemCtrlStats::numStayWriteState, gem5::memory::qos::MemCtrl::MemCtrlStats::numWriteReadTurnArounds, READ, stats, and WRITE.

Referenced by gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), and gem5::memory::MemCtrl::processNextReqEvent().

◆ schedule() [1/2]

uint8_t gem5::memory::qos::MemCtrl::schedule ( const PacketPtr pkt )

protected

Definition at line 232 of file mem_ctrl.cc.

References DPRINTF, gem5::Packet::getSize(), policy, gem5::Packet::qosValue(), gem5::Packet::req, and schedule().

◆ schedule() [2/2]

uint8_t gem5::memory::qos::MemCtrl::schedule	(	RequestorID	id,
		uint64_t	data
	)

protected

Definition at line 218 of file mem_ctrl.cc.

References data, DPRINTF, and policy.

Referenced by gem5::memory::MemCtrl::addToReadQueue(), gem5::memory::MemCtrl::addToWriteQueue(), gem5::memory::MemCtrl::drain(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processRespondEvent(), qosSchedule(), gem5::memory::qos::MemSinkCtrl::recvTimingReq(), gem5::memory::MemCtrl::restartScheduler(), and schedule().

◆ selectNextBusState()

MemCtrl::BusState gem5::memory::qos::MemCtrl::selectNextBusState ( )

protected

Returns next bus direction (READ or WRITE) based on configured policy.

Definition at line 247 of file mem_ctrl.cc.

References DPRINTF, getBusState(), getTotalReadQueueSize(), getTotalWriteQueueSize(), READ, turnPolicy, and WRITE.

Referenced by gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), and gem5::memory::MemCtrl::processNextReqEvent().

◆ setCurrentBusState()

void gem5::memory::qos::MemCtrl::setCurrentBusState ( )

inlineprotected

Set current bus direction (READ or WRITE) from next selected one.

Definition at line 240 of file mem_ctrl.hh.

References busState, and busStateNext.

Referenced by gem5::memory::qos::MemSinkCtrl::processNextReqEvent().

◆ system()

System* gem5::memory::qos::MemCtrl::system ( ) const

inline

read the system pointer

Returns: pointer to the system object

Definition at line 371 of file mem_ctrl.hh.

References _system.

Referenced by gem5::memory::MemCtrl::drainResume(), gem5::memory::qos::PropFairPolicy::initRequestor(), gem5::memory::qos::Policy::pair(), gem5::memory::qos::MemCtrl::MemCtrlStats::regStats(), gem5::memory::qos::FixedPriorityPolicy::schedule(), and gem5::memory::MemCtrl::startup().

Member Data Documentation

◆ _numPriorities

const uint8_t gem5::memory::qos::MemCtrl::_numPriorities

protected

Number of configured QoS priorities.

Definition at line 97 of file mem_ctrl.hh.

Referenced by MemCtrl(), and numPriorities().

◆ _system

System* gem5::memory::qos::MemCtrl::_system

protected

Pointer to the System object.

Definition at line 176 of file mem_ctrl.hh.

Referenced by addRequestor(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), qosSchedule(), gem5::memory::qos::MemSinkCtrl::recvTimingReq(), and system().

◆ busState

BusState gem5::memory::qos::MemCtrl::busState

protected

Bus state used to control the read/write switching and drive the scheduling of the next request.

Definition at line 140 of file mem_ctrl.hh.

Referenced by getBusState(), gem5::memory::MemCtrl::inReadBusState(), gem5::memory::MemCtrl::inWriteBusState(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), recordTurnaroundStats(), and setCurrentBusState().

◆ busStateNext

BusState gem5::memory::qos::MemCtrl::busStateNext

protected

bus state for next request event triggered

Definition at line 143 of file mem_ctrl.hh.

Referenced by getBusStateNext(), gem5::memory::MemCtrl::inReadBusState(), gem5::memory::MemCtrl::inWriteBusState(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), recordTurnaroundStats(), and setCurrentBusState().

◆ packetPriorities

std::unordered_map<RequestorID, std::vector<uint64_t> > gem5::memory::qos::MemCtrl::packetPriorities

protected

Hash of requestors - number of packets queued per priority.

Definition at line 112 of file mem_ctrl.hh.

Referenced by addRequestor(), escalate(), escalateQueues(), logRequest(), and logResponse().

◆ policy

const std::unique_ptr<Policy> gem5::memory::qos::MemCtrl::policy

protected

QoS Policy, assigns QoS priority to the incoming packets.

Definition at line 88 of file mem_ctrl.hh.

Referenced by MemCtrl(), and schedule().

◆ qosPriorityEscalation

const bool gem5::memory::qos::MemCtrl::qosPriorityEscalation

protected

Enables QoS priority escalation.

Definition at line 100 of file mem_ctrl.hh.

Referenced by qosSchedule().

◆ qosSyncroScheduler

const bool gem5::memory::qos::MemCtrl::qosSyncroScheduler

protected

Enables QoS synchronized scheduling invokes the QoS scheduler on all requestors, at every packet arrival.

Definition at line 106 of file mem_ctrl.hh.

Referenced by qosSchedule().

◆ queuePolicy

const std::unique_ptr<QueuePolicy> gem5::memory::qos::MemCtrl::queuePolicy

protected

QoS Queue Policy: selects packet among same-priority queue.

Definition at line 94 of file mem_ctrl.hh.

Referenced by MemCtrl(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), and gem5::memory::qos::MemSinkCtrl::recvTimingReq().

◆ readQueueSizes

std::vector<uint64_t> gem5::memory::qos::MemCtrl::readQueueSizes

protected

Read request packets queue length in #packets, per QoS priority.

Definition at line 125 of file mem_ctrl.hh.

Referenced by escalate(), escalateQueues(), getReadQueueSize(), logRequest(), logResponse(), MemCtrl(), and gem5::memory::qos::MemSinkCtrl::processNextReqEvent().

◆ requestors

std::unordered_map<RequestorID, const std::string> gem5::memory::qos::MemCtrl::requestors

protected

Hash of requestor ID - requestor name.

Definition at line 109 of file mem_ctrl.hh.

Referenced by addRequestor(), escalate(), escalateQueues(), hasRequestor(), logRequest(), logResponse(), and qosSchedule().

◆ requestTimes

std::unordered_map<RequestorID, std::unordered_map<uint64_t, std::deque<uint64_t> > > gem5::memory::qos::MemCtrl::requestTimes

protected

Hash of requestors - address of request - queue of times of request.

Definition at line 116 of file mem_ctrl.hh.

Referenced by logRequest(), and logResponse().

◆ serviceTick

std::vector<Tick> gem5::memory::qos::MemCtrl::serviceTick

protected

Vector of QoS priorities/last service time.

Refreshed at every qosSchedule call.

Definition at line 122 of file mem_ctrl.hh.

Referenced by getServiceTick(), MemCtrl(), and qosSchedule().

◆ stats

gem5::memory::qos::MemCtrl::MemCtrlStats gem5::memory::qos::MemCtrl::stats

protected

Referenced by logRequest(), logResponse(), and recordTurnaroundStats().

◆ totalReadQueueSize

uint64_t gem5::memory::qos::MemCtrl::totalReadQueueSize

protected

Total read request packets queue length in #packets.

Definition at line 131 of file mem_ctrl.hh.

Referenced by gem5::memory::MemCtrl::addToReadQueue(), gem5::memory::qos::MemSinkCtrl::drain(), gem5::memory::MemCtrl::drain(), getTotalReadQueueSize(), logRequest(), logResponse(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processRespondEvent(), gem5::memory::qos::MemSinkCtrl::readQueueFull(), and gem5::memory::MemCtrl::readQueueFull().

◆ totalWriteQueueSize

uint64_t gem5::memory::qos::MemCtrl::totalWriteQueueSize

protected

Total write request packets queue length in #packets.

Definition at line 134 of file mem_ctrl.hh.

Referenced by gem5::memory::MemCtrl::addToWriteQueue(), gem5::memory::qos::MemSinkCtrl::drain(), gem5::memory::MemCtrl::drain(), getTotalWriteQueueSize(), logRequest(), logResponse(), gem5::memory::qos::MemSinkCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processNextReqEvent(), gem5::memory::MemCtrl::processRespondEvent(), gem5::memory::qos::MemSinkCtrl::writeQueueFull(), and gem5::memory::MemCtrl::writeQueueFull().

◆ turnPolicy

const std::unique_ptr<TurnaroundPolicy> gem5::memory::qos::MemCtrl::turnPolicy

protected

QoS Bus Turnaround Policy: selects the bus direction (READ/WRITE)

Definition at line 91 of file mem_ctrl.hh.

Referenced by MemCtrl(), gem5::memory::MemCtrl::processNextReqEvent(), and selectNextBusState().

◆ writeQueueSizes

std::vector<uint64_t> gem5::memory::qos::MemCtrl::writeQueueSizes

protected

Write request packets queue length in #packets, per QoS priority.

Definition at line 128 of file mem_ctrl.hh.

Referenced by escalate(), escalateQueues(), getWriteQueueSize(), logRequest(), logResponse(), MemCtrl(), and gem5::memory::qos::MemSinkCtrl::processNextReqEvent().

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

mem/qos/mem_ctrl.hh
mem/qos/mem_ctrl.cc

Classes

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ BusState

Constructor & Destructor Documentation

◆ MemCtrl()

◆ ~MemCtrl()

Member Function Documentation

◆ addRequestor()

◆ escalate()

◆ escalateQueues()

◆ getBusState()

◆ getBusStateNext()

◆ getReadQueueSize()

◆ getServiceTick()

◆ getTotalReadQueueSize()

◆ getTotalWriteQueueSize()

◆ getWriteQueueSize()

◆ hasRequestor()

◆ logRequest()

◆ logResponse()

◆ numPriorities()

◆ qosSchedule()

◆ recordTurnaroundStats()

◆ schedule() [1/2]

◆ schedule() [2/2]

◆ selectNextBusState()

◆ setCurrentBusState()

◆ system()

Member Data Documentation

◆ _numPriorities

◆ _system

◆ busState

◆ busStateNext

◆ packetPriorities

◆ policy

◆ qosPriorityEscalation

◆ qosSyncroScheduler

◆ queuePolicy

◆ readQueueSizes

◆ requestors

◆ requestTimes

◆ serviceTick

◆ stats

◆ totalReadQueueSize

◆ totalWriteQueueSize

◆ turnPolicy

◆ writeQueueSizes