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 QoS::MemCtrl:

Classes
struct	MemCtrlStats

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

Public Types inherited from AbstractMemory
typedef AbstractMemoryParams	Params

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

Public Types inherited from SimObject
typedef SimObjectParams	Params

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

virtual	~MemCtrl ()

void	init () override
	Initializes this object. More...

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

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

bool	hasMaster (MasterID m_id) const
	hasMaster returns true if the selected master(ID) has been registered in the memory controller, which happens if the memory controller has received at least a packet from that master. 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...

Public Member Functions inherited from AbstractMemory
	AbstractMemory (const Params *p)

virtual	~AbstractMemory ()

bool	isNull () const
	See if this is a null memory that should never store data and always return zero. More...

void	setBackingStore (uint8_t *pmem_addr)
	Set the host memory backing store to be used by this memory controller. More...

const std::list< LockedAddr > &	getLockedAddrList () const
	Get the list of locked addresses to allow checkpointing. More...

void	addLockedAddr (LockedAddr addr)
	Add a locked address to allow for checkpointing. More...

System *	system () const
	read the system pointer Implemented for completeness with the setter More...

void	system (System *sys)
	Set the system pointer on this memory This can't be done via a python parameter because the system needs pointers to all the memories and the reverse would create a cycle in the object graph. More...

const Params *	params () const

AddrRange	getAddrRange () const
	Get the address range. More...

uint8_t *	toHostAddr (Addr addr) const
	Transform a gem5 address space address into its physical counterpart in the host address space. More...

uint64_t	size () const
	Get the memory size. More...

Addr	start () const
	Get the start address. More...

bool	isConfReported () const
	Should this memory be passed to the kernel and part of the OS physical memory layout. More...

bool	isInAddrMap () const
	Some memories are used as shadow memories or should for other reasons not be part of the global address map. More...

bool	isKvmMap () const
	When shadow memories are in use, KVM may want to make one or the other, but cannot map both into the guest address space. More...

void	access (PacketPtr pkt)
	Perform an untimed memory access and update all the state (e.g. More...

void	functionalAccess (PacketPtr pkt)
	Perform an untimed memory read or write without changing anything but the memory itself. More...

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	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 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	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 (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

Protected Member Functions
void	addMaster (const MasterID m_id)
	Initializes dynamically counters and statistics for a given Master. More...

void	logRequest (BusState dir, MasterID m_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, MasterID m_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 (MasterID m_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, MasterID m_id, uint8_t tgt_prio)
	Escalates/demotes priority of all packets belonging to the passed master to given priority value. More...

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

Protected Member Functions inherited from AbstractMemory
bool	checkLockedAddrList (PacketPtr pkt)

void	trackLoadLocked (PacketPtr pkt)

bool	writeOK (PacketPtr pkt)

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...

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 masters, at every packet arrival. More...

std::unordered_map< MasterID, const std::string >	masters
	Hash of master ID - master name. More...

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

std::unordered_map< MasterID, std::unordered_map< uint64_t, std::deque< uint64_t > > >	requestTimes
	Hash of masters - 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...

QoS::MemCtrl::MemCtrlStats	stats

Protected Attributes inherited from AbstractMemory
AddrRange	range

uint8_t *	pmemAddr

MemBackdoor	backdoor

const bool	confTableReported

const bool	inAddrMap

const bool	kvmMap

std::list< LockedAddr >	lockedAddrList

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

AbstractMemory::MemStats	stats

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

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 61 of file mem_ctrl.hh.

Member Enumeration Documentation

◆ BusState

enum QoS::MemCtrl::BusState

Bus Direction.

Enumerator
READ
WRITE

Definition at line 65 of file mem_ctrl.hh.

Constructor & Destructor Documentation

◆ MemCtrl()

QoS::MemCtrl::MemCtrl ( const QoSMemCtrlParams * p )

QoS Memory base class.

Parameters

p	pointer to QoSMemCtrl parameters

Definition at line 46 of file mem_ctrl.cc.

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

Referenced by setCurrentBusState().

◆ ~MemCtrl()

QoS::MemCtrl::~MemCtrl ( )

virtual

Definition at line 78 of file mem_ctrl.cc.

Referenced by setCurrentBusState().

Member Function Documentation

◆ addMaster()

void QoS::MemCtrl::addMaster ( const MasterID m_id )

protected

Initializes dynamically counters and statistics for a given Master.

Parameters

m_id	the master ID

Definition at line 271 of file mem_ctrl.cc.

References AbstractMemory::_system, DPRINTF, System::getMasterName(), hasMaster(), masters, numPriorities(), and packetPriorities.

Referenced by escalate(), and logRequest().

◆ escalate()

template<typename Queues >

void QoS::MemCtrl::escalate	(	std::initializer_list< Queues *>	queues,
		uint64_t	queue_entry_size,
		MasterID	m_id,
		uint8_t	tgt_prio
	)

protected

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

Parameters

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

Definition at line 427 of file mem_ctrl.hh.

References addMaster(), DPRINTF, escalateQueues(), masters, numPriorities(), packetPriorities, ArmISA::q, readQueueSizes, and writeQueueSizes.

Referenced by qosSchedule(), and setCurrentBusState().

◆ escalateQueues()

template<typename Queues >

void QoS::MemCtrl::escalateQueues	(	Queues &	queues,
		uint64_t	queue_entry_size,
		MasterID	m_id,
		uint8_t	curr_prio,
		uint8_t	tgt_prio
	)

protected

Escalates/demotes priority of all packets belonging to the passed master 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
m_id	master whose packets priority will change
curr_prio	source queue priority value
tgt_prio	target queue priority value

Definition at line 355 of file mem_ctrl.hh.

References divCeil(), DPRINTF, masters, packetPriorities, panic_if, readQueueSizes, and writeQueueSizes.

Referenced by escalate(), and setCurrentBusState().

◆ getBusState()

BusState QoS::MemCtrl::getBusState ( ) const

inline

Gets the current bus state.

Returns: current bus state

Definition at line 280 of file mem_ctrl.hh.

References busState.

Referenced by QoS::TurnaroundPolicyIdeal::selectBusState(), and selectNextBusState().

◆ getBusStateNext()

BusState QoS::MemCtrl::getBusStateNext ( ) const

inline

Gets the next bus state.

Returns: next bus state

Definition at line 287 of file mem_ctrl.hh.

References busStateNext.

◆ getReadQueueSize()

uint64_t 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 310 of file mem_ctrl.hh.

Referenced by QoS::TurnaroundPolicyIdeal::selectBusState().

◆ getServiceTick()

Tick 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 342 of file mem_ctrl.hh.

◆ getTotalReadQueueSize()

uint64_t QoS::MemCtrl::getTotalReadQueueSize ( ) const

inline

Gets the total combined READ queues size.

Returns: total queues size in packets

Definition at line 327 of file mem_ctrl.hh.

References totalReadQueueSize.

Referenced by selectNextBusState().

◆ getTotalWriteQueueSize()

uint64_t QoS::MemCtrl::getTotalWriteQueueSize ( ) const

inline

Gets the total combined WRITE queues size.

Returns: total queues size in packets

Definition at line 334 of file mem_ctrl.hh.

References totalWriteQueueSize.

Referenced by selectNextBusState().

◆ getWriteQueueSize()

uint64_t 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 319 of file mem_ctrl.hh.

Referenced by QoS::TurnaroundPolicyIdeal::selectBusState().

◆ hasMaster()

bool QoS::MemCtrl::hasMaster ( MasterID m_id ) const

inline

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

Parameters

m_id	master id to lookup

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

Definition at line 299 of file mem_ctrl.hh.

Referenced by addMaster(), QoS::LrgQueuePolicy::enqueuePacket(), logResponse(), and QoS::LrgQueuePolicy::selectPacket().

◆ init()

void QoS::MemCtrl::init ( )

overridevirtual

Initializes this object.

Reimplemented from AbstractMemory.

Reimplemented in QoS::MemSinkCtrl.

Definition at line 82 of file mem_ctrl.cc.

References AbstractMemory::init().

Referenced by QoS::MemSinkCtrl::init(), and setCurrentBusState().

◆ logRequest()

void QoS::MemCtrl::logRequest	(	BusState	dir,
		MasterID	m_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
m_id	master id
qos	packet qos value
addr	packet address
entries	number of entries to record

Definition at line 88 of file mem_ctrl.cc.

References addMaster(), addr, QoS::MemCtrl::MemCtrlStats::avgPriority, QoS::MemCtrl::MemCtrlStats::avgPriorityDistance, curTick(), DPRINTF, ArmISA::i, ArmISA::j, masters, packetPriorities, READ, readQueueSizes, requestTimes, stats, totalReadQueueSize, totalWriteQueueSize, WRITE, and writeQueueSizes.

Referenced by DRAMCtrl::addToReadQueue(), DRAMCtrl::addToWriteQueue(), and QoS::MemSinkCtrl::recvTimingReq().

◆ logResponse()

void QoS::MemCtrl::logResponse	(	BusState	dir,
		MasterID	m_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
m_id	master id
qos	packet qos value
addr	packet address
entries	number of entries to record
delay	response delay

Definition at line 145 of file mem_ctrl.cc.

References curTick(), DPRINTF, hasMaster(), ArmISA::j, masters, packetPriorities, panic_if, QoS::MemCtrl::MemCtrlStats::priorityMaxLatency, QoS::MemCtrl::MemCtrlStats::priorityMinLatency, READ, readQueueSizes, requestTimes, SimClock::Float::s, stats, totalReadQueueSize, totalWriteQueueSize, Stats::VectorBase< Derived, Stor >::value(), WRITE, and writeQueueSizes.

Referenced by QoS::MemSinkCtrl::processNextReqEvent(), and DRAMCtrl::processNextReqEvent().

◆ numPriorities()

uint8_t 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 350 of file mem_ctrl.hh.

References _numPriorities.

Referenced by addMaster(), DRAMCtrl::doDRAMAccess(), escalate(), QoS::PropFairPolicy::initMaster(), QoS::MemSinkCtrl::MemSinkCtrl(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), qosSchedule(), QoS::MemCtrl::MemCtrlStats::regStats(), and QoS::TurnaroundPolicyIdeal::selectBusState().

◆ qosSchedule()

template<typename Queues >

uint8_t 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 475 of file mem_ctrl.hh.

References AbstractMemory::_system, curTick(), DPRINTF, escalate(), System::getMasterName(), ArmISA::m, Packet::masterId(), masters, numPriorities(), qosPriorityEscalation, qosSyncroScheduler, Packet::qosValue(), schedule(), and serviceTick.

Referenced by QoS::MemSinkCtrl::recvTimingReq(), and DRAMCtrl::recvTimingReq().

◆ recordTurnaroundStats()

void QoS::MemCtrl::recordTurnaroundStats ( )

protected

Record statistics on turnarounds based on busStateNext and busState values.

Definition at line 355 of file mem_ctrl.cc.

References busState, busStateNext, READ, Stats::Group::stats, and WRITE.

Referenced by QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), and setCurrentBusState().

◆ schedule() [1/2]

uint8_t QoS::MemCtrl::schedule	(	MasterID	m_id,
		uint64_t	data
	)

protected

Definition at line 214 of file mem_ctrl.cc.

References DPRINTF, and policy.

Referenced by DRAMCtrl::activateBank(), DRAMCtrl::addToReadQueue(), DRAMCtrl::addToWriteQueue(), DRAMCtrl::drain(), DRAMCtrl::prechargeBank(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), DRAMCtrl::processRespondEvent(), qosSchedule(), QoS::MemSinkCtrl::recvTimingReq(), and schedule().

◆ schedule() [2/2]

uint8_t QoS::MemCtrl::schedule ( const PacketPtr pkt )

protected

Definition at line 228 of file mem_ctrl.cc.

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

◆ selectNextBusState()

MemCtrl::BusState QoS::MemCtrl::selectNextBusState ( )

protected

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

Definition at line 243 of file mem_ctrl.cc.

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

Referenced by QoS::MemSinkCtrl::processNextReqEvent(), and DRAMCtrl::processNextReqEvent().

◆ setCurrentBusState()

void QoS::MemCtrl::setCurrentBusState ( )

inlineprotected

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

Definition at line 218 of file mem_ctrl.hh.

References busStateNext, escalate(), escalateQueues(), init(), MemCtrl(), recordTurnaroundStats(), and ~MemCtrl().

Referenced by QoS::MemSinkCtrl::processNextReqEvent().

Member Data Documentation

◆ _numPriorities

const uint8_t QoS::MemCtrl::_numPriorities

protected

Number of configured QoS priorities.

Definition at line 78 of file mem_ctrl.hh.

Referenced by MemCtrl(), and numPriorities().

◆ busState

BusState QoS::MemCtrl::busState

protected

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

Definition at line 121 of file mem_ctrl.hh.

Referenced by getBusState(), DRAMCtrl::minBankPrep(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), and recordTurnaroundStats().

◆ busStateNext

BusState QoS::MemCtrl::busStateNext

protected

bus state for next request event triggered

Definition at line 124 of file mem_ctrl.hh.

Referenced by DRAMCtrl::Rank::forceSelfRefreshExit(), getBusStateNext(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), recordTurnaroundStats(), and setCurrentBusState().

◆ masters

std::unordered_map<MasterID, const std::string> QoS::MemCtrl::masters

protected

Hash of master ID - master name.

Definition at line 90 of file mem_ctrl.hh.

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

◆ packetPriorities

std::unordered_map<MasterID, std::vector<uint64_t> > QoS::MemCtrl::packetPriorities

protected

Hash of masters - number of packets queued per priority.

Definition at line 93 of file mem_ctrl.hh.

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

◆ policy

const std::unique_ptr<Policy> QoS::MemCtrl::policy

protected

QoS Policy, assigns QoS priority to the incoming packets.

Definition at line 69 of file mem_ctrl.hh.

Referenced by MemCtrl(), and schedule().

◆ qosPriorityEscalation

const bool QoS::MemCtrl::qosPriorityEscalation

protected

Enables QoS priority escalation.

Definition at line 81 of file mem_ctrl.hh.

Referenced by qosSchedule().

◆ qosSyncroScheduler

const bool QoS::MemCtrl::qosSyncroScheduler

protected

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

Definition at line 87 of file mem_ctrl.hh.

Referenced by qosSchedule().

◆ queuePolicy

const std::unique_ptr<QueuePolicy> QoS::MemCtrl::queuePolicy

protected

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

Definition at line 75 of file mem_ctrl.hh.

Referenced by MemCtrl(), QoS::MemSinkCtrl::processNextReqEvent(), and QoS::MemSinkCtrl::recvTimingReq().

◆ readQueueSizes

std::vector<uint64_t> QoS::MemCtrl::readQueueSizes

protected

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

Definition at line 106 of file mem_ctrl.hh.

Referenced by escalate(), escalateQueues(), logRequest(), logResponse(), MemCtrl(), and QoS::MemSinkCtrl::processNextReqEvent().

◆ requestTimes

std::unordered_map<MasterID, std::unordered_map<uint64_t, std::deque<uint64_t> > > QoS::MemCtrl::requestTimes

protected

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

Definition at line 97 of file mem_ctrl.hh.

Referenced by logRequest(), and logResponse().

◆ serviceTick

std::vector<Tick> QoS::MemCtrl::serviceTick

protected

Vector of QoS priorities/last service time.

Refreshed at every qosSchedule call.

Definition at line 103 of file mem_ctrl.hh.

Referenced by MemCtrl(), and qosSchedule().

◆ stats

QoS::MemCtrl::MemCtrlStats QoS::MemCtrl::stats

protected

Referenced by logRequest(), and logResponse().

◆ totalReadQueueSize

uint64_t QoS::MemCtrl::totalReadQueueSize

protected

Total read request packets queue length in #packets.

Definition at line 112 of file mem_ctrl.hh.

Referenced by DRAMCtrl::addToReadQueue(), QoS::MemSinkCtrl::drain(), DRAMCtrl::drain(), getTotalReadQueueSize(), logRequest(), logResponse(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), DRAMCtrl::processRespondEvent(), QoS::MemSinkCtrl::readQueueFull(), and DRAMCtrl::readQueueFull().

◆ totalWriteQueueSize

uint64_t QoS::MemCtrl::totalWriteQueueSize

protected

Total write request packets queue length in #packets.

Definition at line 115 of file mem_ctrl.hh.

Referenced by DRAMCtrl::addToWriteQueue(), QoS::MemSinkCtrl::drain(), DRAMCtrl::drain(), getTotalWriteQueueSize(), logRequest(), logResponse(), QoS::MemSinkCtrl::processNextReqEvent(), DRAMCtrl::processNextReqEvent(), DRAMCtrl::processRespondEvent(), QoS::MemSinkCtrl::writeQueueFull(), and DRAMCtrl::writeQueueFull().

◆ turnPolicy

const std::unique_ptr<TurnaroundPolicy> QoS::MemCtrl::turnPolicy

protected

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

Definition at line 72 of file mem_ctrl.hh.

Referenced by MemCtrl(), DRAMCtrl::processNextReqEvent(), and selectNextBusState().

◆ writeQueueSizes

std::vector<uint64_t> QoS::MemCtrl::writeQueueSizes

protected

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

Definition at line 109 of file mem_ctrl.hh.

Referenced by escalate(), escalateQueues(), logRequest(), logResponse(), MemCtrl(), and 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

◆ addMaster()

◆ escalate()

◆ escalateQueues()

◆ getBusState()

◆ getBusStateNext()

◆ getReadQueueSize()

◆ getServiceTick()

◆ getTotalReadQueueSize()

◆ getTotalWriteQueueSize()

◆ getWriteQueueSize()

◆ hasMaster()

◆ init()

◆ logRequest()

◆ logResponse()

◆ numPriorities()

◆ qosSchedule()

◆ recordTurnaroundStats()

◆ schedule() [1/2]

◆ schedule() [2/2]

◆ selectNextBusState()

◆ setCurrentBusState()

Member Data Documentation

◆ _numPriorities

◆ busState

◆ busStateNext

◆ masters

◆ packetPriorities

◆ policy

◆ qosPriorityEscalation

◆ qosSyncroScheduler

◆ queuePolicy

◆ readQueueSizes

◆ requestTimes

◆ serviceTick

◆ stats

◆ totalReadQueueSize

◆ totalWriteQueueSize

◆ turnPolicy

◆ writeQueueSizes