Implements PIE Active Queue Management discipline. More...

#include "pie-queue-disc.h"

Inheritance diagram for ns3::PieQueueDisc:

Collaboration diagram for ns3::PieQueueDisc:

Public Types
enum	BurstStateT { NO_BURST , IN_BURST , IN_BURST_PROTECTING }
	Burst types. More...

Public Types inherited from ns3::QueueDisc
typedef Queue< QueueDiscItem >	InternalQueue
	Internal queues store QueueDiscItem objects.

typedef std::function< void(Ptr< QueueDiscItem >)>	SendCallback
	Callback invoked to send a packet to the receiving object when Run is called.

enum	WakeMode { WAKE_ROOT = 0x00 , WAKE_CHILD = 0x01 }
	Used to determine whether the queue disc itself or its children must be activated when a netdevice wakes a transmission queue. More...

Public Member Functions
	PieQueueDisc ()
	PieQueueDisc Constructor.

	~PieQueueDisc () override
	PieQueueDisc Destructor.

int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model.

Time	GetQueueDelay ()
	Get queue delay.

Public Member Functions inherited from ns3::QueueDisc
	QueueDisc (const QueueDisc &)=delete

	QueueDisc (QueueDiscSizePolicy policy, QueueSizeUnit unit)
	Constructor.

	QueueDisc (QueueDiscSizePolicy policy=QueueDiscSizePolicy::SINGLE_INTERNAL_QUEUE)
	Constructor.

	~QueueDisc () override

void	AddInternalQueue (Ptr< InternalQueue > queue)
	Add an internal queue to the tail of the list of queues.

void	AddPacketFilter (Ptr< PacketFilter > filter)
	Add a packet filter to the tail of the list of filters used to classify packets.

void	AddQueueDiscClass (Ptr< QueueDiscClass > qdClass)
	Add a queue disc class to the tail of the list of classes.

int32_t	Classify (Ptr< QueueDiscItem > item)
	Classify a packet by calling the packet filters, one at a time, until either a filter able to classify the packet is found or all the filters have been processed.

Ptr< QueueDiscItem >	Dequeue ()
	Extract from the queue disc the packet that has been dequeued by calling Peek, if any, or call the private DoDequeue method (which must be implemented by derived classes) to dequeue a packet, otherwise.

bool	Enqueue (Ptr< QueueDiscItem > item)
	Pass a packet to store to the queue discipline.

QueueSize	GetCurrentSize () const
	Get the current size of the queue disc in bytes, if operating in bytes mode, or packets, otherwise.

Ptr< InternalQueue >	GetInternalQueue (std::size_t i) const
	Get the i-th internal queue.

QueueSize	GetMaxSize () const
	Get the maximum size of the queue disc.

uint32_t	GetNBytes () const
	Get the amount of bytes stored by the queue disc.

Ptr< NetDeviceQueueInterface >	GetNetDeviceQueueInterface () const

std::size_t	GetNInternalQueues () const
	Get the number of internal queues.

std::size_t	GetNPacketFilters () const
	Get the number of packet filters.

uint32_t	GetNPackets () const
	Get the number of packets stored by the queue disc.

std::size_t	GetNQueueDiscClasses () const
	Get the number of queue disc classes.

Ptr< PacketFilter >	GetPacketFilter (std::size_t i) const
	Get the i-th packet filter.

Ptr< QueueDiscClass >	GetQueueDiscClass (std::size_t i) const
	Get the i-th queue disc class.

virtual uint32_t	GetQuota () const
	Get the maximum number of dequeue operations following a packet enqueue.

SendCallback	GetSendCallback () const

const Stats &	GetStats ()
	Retrieve all the collected statistics.

virtual WakeMode	GetWakeMode () const
	When setting up the wake callbacks on the netdevice queues, it is necessary to determine which queue disc (the root queue disc or one of its children) should be activated when the netdevice wakes one of its transmission queues.

QueueDisc &	operator= (const QueueDisc &)=delete

Ptr< const QueueDiscItem >	Peek ()
	Get a copy of the next packet the queue discipline will extract.

void	Run ()
	Modelled after the Linux function __qdisc_run (net/sched/sch_generic.c) Dequeues multiple packets, until a quota is exceeded or sending a packet to the device failed.

bool	SetMaxSize (QueueSize size)
	Set the maximum size of the queue disc.

void	SetNetDeviceQueueInterface (Ptr< NetDeviceQueueInterface > ndqi)

virtual void	SetQuota (const uint32_t quota)
	Set the maximum number of dequeue operations following a packet enqueue.

void	SetSendCallback (SendCallback func)

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor.

	~Object () override
	Destructor.

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.

void	Dispose ()
	Dispose of this Object.

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.

TypeId	GetInstanceTypeId () const override
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.

bool	IsInitialized () const
	Check if the object has been initialized.

void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.

void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::QueueDisc
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Attributes
static constexpr const char *	CE_THRESHOLD_EXCEEDED_MARK
	Early probability marks: proactive.

static constexpr const char *	FORCED_DROP
	Drops due to queue limit: reactive.

static constexpr const char *	UNFORCED_DROP
	Early probability drops: proactive.

static constexpr const char *	UNFORCED_MARK
	Early probability marks: proactive.

Static Public Attributes inherited from ns3::QueueDisc
static constexpr const char *	CHILD_QUEUE_DISC_DROP
	Packet dropped by a child queue disc.

static constexpr const char *	CHILD_QUEUE_DISC_MARK
	Packet marked by a child queue disc.

static constexpr const char *	INTERNAL_QUEUE_DROP
	Packet dropped by an internal queue.

Protected Member Functions
void	DoDispose () override
	Dispose of the object.

Protected Member Functions inherited from ns3::QueueDisc
void	DoDispose () override
	Dispose of the object.

void	DoInitialize () override
	Check whether the configuration is correct and initialize parameters.

void	DropAfterDequeue (Ptr< const QueueDiscItem > item, const char *reason)
	Perform the actions required when the queue disc is notified of a packet dropped after dequeue.

void	DropBeforeEnqueue (Ptr< const QueueDiscItem > item, const char *reason)
	Perform the actions required when the queue disc is notified of a packet dropped before enqueue.

bool	Mark (Ptr< QueueDiscItem > item, const char *reason)
	Marks the given packet and, if successful, updates the counters associated with the given reason.

Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.

Private Member Functions
void	CalculateP ()
	Periodically update the drop probability based on the delay samples: not only the current delay sample but also the trend where the delay is going, up or down.

bool	CheckConfig () override
	Check whether the current configuration is correct.

Ptr< QueueDiscItem >	DoDequeue () override
	This function actually extracts a packet from the queue disc.

bool	DoEnqueue (Ptr< QueueDiscItem > item) override
	This function actually enqueues a packet into the queue disc.

bool	DropEarly (Ptr< QueueDiscItem > item, uint32_t qSize)
	Check if a packet needs to be dropped due to probability drop.

void	InitializeParams () override
	Initialize the queue parameters.

Private Attributes
double	m_a
	Parameter to pie controller.

double	m_accuProb
	Accumulated drop probability.

bool	m_active
	Indicates whether PIE is in active state or not.

Time	m_activeThreshold
	Threshold for activating PIE (disabled by default)

double	m_avgDqRate
	Time averaged dequeue rate.

double	m_b
	Parameter to pie controller.

Time	m_burstAllowance
	Current max burst value in seconds that is allowed before random drops kick in.

uint32_t	m_burstReset
	Used to reset value of burst allowance.

BurstStateT	m_burstState
	Used to determine the current state of burst.

Time	m_ceThreshold
	Threshold above which to CE mark.

uint64_t	m_dqCount
	Number of bytes departed since current measurement cycle starts.

Time	m_dqStart
	Start timestamp of current measurement cycle.

uint32_t	m_dqThreshold
	Minimum queue size in bytes before dequeue rate is measured.

double	m_dropProb
	Variable used in calculation of drop probability.

bool	m_inMeasurement
	Indicates whether we are in a measurement cycle.

bool	m_isCapDropAdjustment
	Enable/Disable Cap Drop Adjustment feature mentioned in RFC 8033.

double	m_markEcnTh
	ECN marking threshold (default 10% as suggested in RFC 8033)

Time	m_maxBurst
	Maximum burst allowed before random early dropping kicks in.

uint32_t	m_meanPktSize
	Average packet size in bytes.

Time	m_qDelay
	Current value of queue delay.

Time	m_qDelayOld
	Old value of queue delay.

Time	m_qDelayRef
	Desired queue delay.

EventId	m_rtrsEvent
	Event used to decide the decision of interval of drop probability calculation.

Time	m_sUpdate
	Start time of the update timer.

Time	m_tUpdate
	Time period after which CalculateP () is called.

bool	m_useDerandomization
	Enable Derandomization feature mentioned in RFC 8033.

bool	m_useDqRateEstimator
	Enable/Disable usage of dequeue rate estimator for queue delay calculation.

bool	m_useEcn
	Enable ECN Marking functionality.

bool	m_useL4s
	True if L4S is used (ECT1 packets are marked at CE threshold)

Ptr< UniformRandomVariable >	m_uv
	Rng stream.

Static Private Attributes
static const uint64_t	DQCOUNT_INVALID
	Invalid dqCount value.

Friends
class	::PieQueueDiscTestCase

Additional Inherited Members
Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

Implements PIE Active Queue Management discipline.

Definition at line 43 of file pie-queue-disc.h.

Member Enumeration Documentation

◆ BurstStateT

enum ns3::PieQueueDisc::BurstStateT

Burst types.

Enumerator
NO_BURST
IN_BURST
IN_BURST_PROTECTING

Definition at line 65 of file pie-queue-disc.h.

Constructor & Destructor Documentation

◆ PieQueueDisc()

ns3::PieQueueDisc::PieQueueDisc ( )

PieQueueDisc Constructor.

Definition at line 130 of file pie-queue-disc.cc.

References CalculateP(), ns3::CreateObject(), m_rtrsEvent, m_sUpdate, m_uv, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

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◆ ~PieQueueDisc()

ns3::PieQueueDisc::~PieQueueDisc ( )

override

PieQueueDisc Destructor.

Definition at line 138 of file pie-queue-disc.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

◆ AssignStreams()

int64_t ns3::PieQueueDisc::AssignStreams ( int64_t stream )

Assign a fixed random variable stream number to the random variables used by this model.

Return the number of streams (possibly zero) that have been assigned.

Parameters

stream first stream index to use

Returns: the number of stream indices assigned by this model

Definition at line 159 of file pie-queue-disc.cc.

References m_uv, and NS_LOG_FUNCTION.

◆ CalculateP()

void ns3::PieQueueDisc::CalculateP ( )

private

Periodically update the drop probability based on the delay samples: not only the current delay sample but also the trend where the delay is going, up or down.

Definition at line 318 of file pie-queue-disc.cc.

References BURST_RESET_TIMEOUT, CalculateP(), DQCOUNT_INVALID, ns3::QueueDisc::GetInternalQueue(), ns3::Time::GetMilliSeconds(), ns3::QueueDisc::GetNBytes(), ns3::Time::GetSeconds(), IN_BURST, IN_BURST_PROTECTING, m_a, m_avgDqRate, m_b, m_burstAllowance, m_burstReset, m_burstState, m_dqCount, m_dropProb, m_isCapDropAdjustment, m_qDelay, m_qDelayOld, m_qDelayRef, m_rtrsEvent, m_tUpdate, m_useDqRateEstimator, NO_BURST, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Simulator::Schedule(), and ns3::Seconds().

Referenced by PieQueueDisc(), and CalculateP().

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◆ CheckConfig()

bool ns3::PieQueueDisc::CheckConfig ( )

overrideprivatevirtual

Check whether the current configuration is correct.

Default objects (such as internal queues) might be created by this method to ensure the configuration is correct. This method is automatically called at simulation initialization time, and it is called before the InitializeParams () method. It is appropriate to promote parameter initialization to this method if it aids in checking for correct configuration.

See also: QueueDisc::InitializeParams

Returns: true if the configuration is correct, false otherwise

Implements ns3::QueueDisc.

Definition at line 560 of file pie-queue-disc.cc.

References ns3::QueueDisc::AddInternalQueue(), ns3::CreateObjectWithAttributes(), ns3::QueueDisc::GetMaxSize(), ns3::QueueDisc::GetNInternalQueues(), ns3::QueueDisc::GetNPacketFilters(), ns3::QueueDisc::GetNQueueDiscClasses(), NS_LOG_ERROR, and NS_LOG_FUNCTION.

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◆ DoDequeue()

Ptr< QueueDiscItem > ns3::PieQueueDisc::DoDequeue ( )

overrideprivatevirtual

This function actually extracts a packet from the queue disc.

Returns: 0 if the operation was not successful; the item otherwise.

Implements ns3::QueueDisc.

Definition at line 460 of file pie-queue-disc.cc.

References CE_THRESHOLD_EXCEEDED_MARK, ns3::QueueDisc::GetInternalQueue(), ns3::QueueDisc::GetNBytes(), ns3::Time::GetSeconds(), ns3::QueueItem::IP_DSFIELD, m_avgDqRate, m_ceThreshold, m_dqCount, m_dqStart, m_dqThreshold, m_inMeasurement, m_qDelay, m_useDqRateEstimator, m_useL4s, ns3::QueueDisc::Mark(), ns3::Now(), NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, NS_LOG_LOGIC, and ns3::Seconds().

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◆ DoDispose()

void ns3::PieQueueDisc::DoDispose ( )

overrideprotectedvirtual

Dispose of the object.

Reimplemented from ns3::Object.

Definition at line 144 of file pie-queue-disc.cc.

References ns3::EventId::Cancel(), ns3::QueueDisc::DoDispose(), m_rtrsEvent, m_uv, and NS_LOG_FUNCTION.

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◆ DoEnqueue()

bool ns3::PieQueueDisc::DoEnqueue ( Ptr< QueueDiscItem > item )

overrideprivatevirtual

This function actually enqueues a packet into the queue disc.

Parameters

item	item to enqueue

Returns: True if the operation was successful; false otherwise

Implements ns3::QueueDisc.

Definition at line 167 of file pie-queue-disc.cc.

References ns3::QueueDisc::DropBeforeEnqueue(), DropEarly(), FORCED_DROP, ns3::QueueDisc::GetCurrentSize(), ns3::QueueDisc::GetInternalQueue(), ns3::QueueDisc::GetMaxSize(), ns3::Time::GetMilliSeconds(), ns3::QueueDisc::GetNBytes(), ns3::QueueDisc::GetNPackets(), ns3::QueueSize::GetValue(), ns3::QueueItem::IP_DSFIELD, m_accuProb, m_active, m_activeThreshold, m_avgDqRate, m_burstAllowance, m_dqCount, m_dqStart, m_dropProb, m_inMeasurement, m_markEcnTh, m_maxBurst, m_qDelay, m_qDelayOld, m_useEcn, m_useL4s, ns3::QueueDisc::Mark(), ns3::Time::Max(), ns3::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, NS_LOG_LOGIC, ns3::Seconds(), UNFORCED_DROP, and UNFORCED_MARK.

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◆ DropEarly()

bool ns3::PieQueueDisc::DropEarly	(	Ptr< QueueDiscItem >	item,
		uint32_t	qSize )

private

Check if a packet needs to be dropped due to probability drop.

Parameters

item	queue item
qSize	queue size

Returns: 0 for no drop, 1 for drop

Definition at line 264 of file pie-queue-disc.cc.

References ns3::BYTES, ns3::QueueDisc::GetMaxSize(), ns3::Time::GetSeconds(), IN_BURST_PROTECTING, m_accuProb, m_burstAllowance, m_burstState, m_dropProb, m_maxBurst, m_meanPktSize, m_qDelayOld, m_qDelayRef, m_useDerandomization, m_uv, NO_BURST, NS_LOG_FUNCTION, ns3::PACKETS, and packetSize.

Referenced by DoEnqueue().

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◆ GetQueueDelay()

Time ns3::PieQueueDisc::GetQueueDelay ( )

Get queue delay.

Returns: The current queue delay.

Definition at line 153 of file pie-queue-disc.cc.

References m_qDelay.

◆ GetTypeId()

TypeId ns3::PieQueueDisc::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 34 of file pie-queue-disc.cc.

References ns3::QueueDisc::GetMaxSize(), m_a, m_activeThreshold, m_b, m_ceThreshold, m_dqThreshold, m_isCapDropAdjustment, m_markEcnTh, m_maxBurst, m_meanPktSize, m_qDelayRef, m_sUpdate, m_tUpdate, m_useDerandomization, m_useDqRateEstimator, m_useEcn, m_useL4s, ns3::MakeBooleanAccessor(), ns3::MakeBooleanChecker(), ns3::MakeDoubleAccessor(), ns3::MakeDoubleChecker(), ns3::MakeQueueSizeAccessor(), ns3::MakeQueueSizeChecker(), ns3::MakeTimeAccessor(), ns3::MakeTimeChecker(), ns3::MakeUintegerAccessor(), ns3::MakeUintegerChecker(), ns3::Time::Max(), ns3::MilliSeconds(), ns3::Seconds(), ns3::QueueDisc::SetMaxSize(), and ns3::TypeId::SetParent().

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◆ InitializeParams()

void ns3::PieQueueDisc::InitializeParams ( )

overrideprivatevirtual

Initialize the queue parameters.

Implements ns3::QueueDisc.

Definition at line 249 of file pie-queue-disc.cc.

References DQCOUNT_INVALID, m_accuProb, m_active, m_avgDqRate, m_burstState, m_dqCount, m_dqStart, m_dropProb, m_inMeasurement, m_qDelayOld, NO_BURST, and ns3::Seconds().

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Friends And Related Symbol Documentation

◆ ::PieQueueDiscTestCase

friend class ::PieQueueDiscTestCase

friend

Definition at line 105 of file pie-queue-disc.h.

Member Data Documentation

◆ CE_THRESHOLD_EXCEEDED_MARK

const char* ns3::PieQueueDisc::CE_THRESHOLD_EXCEEDED_MARK

staticconstexpr

Initial value:

=

"CE threshold exceeded mark"

Early probability marks: proactive.

Definition at line 95 of file pie-queue-disc.h.

Referenced by DoDequeue(), and FqPieQueueDiscL4sMode::DoRun().

◆ DQCOUNT_INVALID

const uint64_t ns3::PieQueueDisc::DQCOUNT_INVALID

staticprivate

Initial value:

=

std::numeric_limits<uint64_t>::max()

Invalid dqCount value.

Definition at line 130 of file pie-queue-disc.h.

Referenced by CalculateP(), and InitializeParams().

◆ FORCED_DROP

const char* ns3::PieQueueDisc::FORCED_DROP

staticconstexpr

Initial value:

=

"Forced drop"

Drops due to queue limit: reactive.

Definition at line 91 of file pie-queue-disc.h.

Referenced by DoEnqueue(), and PieQueueDiscTestCase::RunPieTest().

◆ m_a

double ns3::PieQueueDisc::m_a

private

Parameter to pie controller.

Definition at line 139 of file pie-queue-disc.h.

Referenced by CalculateP(), and GetTypeId().

◆ m_accuProb

double ns3::PieQueueDisc::m_accuProb

private

Accumulated drop probability.

Definition at line 168 of file pie-queue-disc.h.

Referenced by DoEnqueue(), DropEarly(), and InitializeParams().

◆ m_active

bool ns3::PieQueueDisc::m_active

private

Indicates whether PIE is in active state or not.

Definition at line 169 of file pie-queue-disc.h.

Referenced by DoEnqueue(), and InitializeParams().

◆ m_activeThreshold

Time ns3::PieQueueDisc::m_activeThreshold

private

Threshold for activating PIE (disabled by default)

Definition at line 149 of file pie-queue-disc.h.

Referenced by DoEnqueue(), and GetTypeId().

◆ m_avgDqRate

double ns3::PieQueueDisc::m_avgDqRate

private

Time averaged dequeue rate.

Definition at line 162 of file pie-queue-disc.h.

Referenced by CalculateP(), DoDequeue(), DoEnqueue(), and InitializeParams().

◆ m_b

double ns3::PieQueueDisc::m_b

private

Parameter to pie controller.

Definition at line 140 of file pie-queue-disc.h.

Referenced by CalculateP(), and GetTypeId().

◆ m_burstAllowance

Time ns3::PieQueueDisc::m_burstAllowance

private

Current max burst value in seconds that is allowed before random drops kick in.

Definition at line 157 of file pie-queue-disc.h.

Referenced by CalculateP(), DoEnqueue(), and DropEarly().

◆ m_burstReset

uint32_t ns3::PieQueueDisc::m_burstReset

private

Used to reset value of burst allowance.

Definition at line 159 of file pie-queue-disc.h.

Referenced by CalculateP().

◆ m_burstState

BurstStateT ns3::PieQueueDisc::m_burstState

private

Used to determine the current state of burst.

Definition at line 160 of file pie-queue-disc.h.

Referenced by CalculateP(), DropEarly(), and InitializeParams().

◆ m_ceThreshold

Time ns3::PieQueueDisc::m_ceThreshold

private

Threshold above which to CE mark.

Definition at line 150 of file pie-queue-disc.h.

Referenced by DoDequeue(), and GetTypeId().

◆ m_dqCount

uint64_t ns3::PieQueueDisc::m_dqCount

private

Number of bytes departed since current measurement cycle starts.

Definition at line 164 of file pie-queue-disc.h.

Referenced by CalculateP(), DoDequeue(), DoEnqueue(), and InitializeParams().

◆ m_dqStart

Time ns3::PieQueueDisc::m_dqStart

private

Start timestamp of current measurement cycle.

Definition at line 163 of file pie-queue-disc.h.

Referenced by DoDequeue(), DoEnqueue(), and InitializeParams().

◆ m_dqThreshold

uint32_t ns3::PieQueueDisc::m_dqThreshold

private

Minimum queue size in bytes before dequeue rate is measured.

Definition at line 141 of file pie-queue-disc.h.

Referenced by DoDequeue(), and GetTypeId().

◆ m_dropProb

double ns3::PieQueueDisc::m_dropProb

private

Variable used in calculation of drop probability.

Definition at line 154 of file pie-queue-disc.h.

Referenced by CalculateP(), DoEnqueue(), DropEarly(), and InitializeParams().

◆ m_inMeasurement

bool ns3::PieQueueDisc::m_inMeasurement

private

Indicates whether we are in a measurement cycle.

Definition at line 161 of file pie-queue-disc.h.

Referenced by DoDequeue(), DoEnqueue(), and InitializeParams().

◆ m_isCapDropAdjustment

bool ns3::PieQueueDisc::m_isCapDropAdjustment

private

Enable/Disable Cap Drop Adjustment feature mentioned in RFC 8033.

Definition at line 145 of file pie-queue-disc.h.

Referenced by CalculateP(), and GetTypeId().

◆ m_markEcnTh

double ns3::PieQueueDisc::m_markEcnTh

private

ECN marking threshold (default 10% as suggested in RFC 8033)

Definition at line 148 of file pie-queue-disc.h.

Referenced by DoEnqueue(), and GetTypeId().

◆ m_maxBurst

Time ns3::PieQueueDisc::m_maxBurst

private

Maximum burst allowed before random early dropping kicks in.

Definition at line 138 of file pie-queue-disc.h.

Referenced by DoEnqueue(), DropEarly(), and GetTypeId().

◆ m_meanPktSize

uint32_t ns3::PieQueueDisc::m_meanPktSize

private

Average packet size in bytes.

Definition at line 137 of file pie-queue-disc.h.

Referenced by DropEarly(), and GetTypeId().

◆ m_qDelay

Time ns3::PieQueueDisc::m_qDelay

private

Current value of queue delay.

Definition at line 156 of file pie-queue-disc.h.

Referenced by CalculateP(), DoDequeue(), DoEnqueue(), and GetQueueDelay().

◆ m_qDelayOld

Time ns3::PieQueueDisc::m_qDelayOld

private

Old value of queue delay.

Definition at line 155 of file pie-queue-disc.h.

Referenced by CalculateP(), DoEnqueue(), DropEarly(), and InitializeParams().

◆ m_qDelayRef

Time ns3::PieQueueDisc::m_qDelayRef

private

Desired queue delay.

Definition at line 136 of file pie-queue-disc.h.

Referenced by CalculateP(), DropEarly(), and GetTypeId().

◆ m_rtrsEvent

EventId ns3::PieQueueDisc::m_rtrsEvent

private

Event used to decide the decision of interval of drop probability calculation.

Definition at line 165 of file pie-queue-disc.h.

Referenced by PieQueueDisc(), CalculateP(), and DoDispose().

◆ m_sUpdate

Time ns3::PieQueueDisc::m_sUpdate

private

Start time of the update timer.

Definition at line 134 of file pie-queue-disc.h.

Referenced by PieQueueDisc(), and GetTypeId().

◆ m_tUpdate

Time ns3::PieQueueDisc::m_tUpdate

private

Time period after which CalculateP () is called.

Definition at line 135 of file pie-queue-disc.h.

Referenced by CalculateP(), and GetTypeId().

◆ m_useDerandomization

bool ns3::PieQueueDisc::m_useDerandomization

private

Enable Derandomization feature mentioned in RFC 8033.

Definition at line 147 of file pie-queue-disc.h.

Referenced by DropEarly(), and GetTypeId().

◆ m_useDqRateEstimator

bool ns3::PieQueueDisc::m_useDqRateEstimator

private

Enable/Disable usage of dequeue rate estimator for queue delay calculation.

Definition at line 142 of file pie-queue-disc.h.

Referenced by CalculateP(), DoDequeue(), and GetTypeId().

◆ m_useEcn

bool ns3::PieQueueDisc::m_useEcn

private

Enable ECN Marking functionality.

Definition at line 146 of file pie-queue-disc.h.

Referenced by DoEnqueue(), and GetTypeId().

◆ m_useL4s

bool ns3::PieQueueDisc::m_useL4s

private

True if L4S is used (ECT1 packets are marked at CE threshold)

Definition at line 151 of file pie-queue-disc.h.

Referenced by DoDequeue(), DoEnqueue(), and GetTypeId().

◆ m_uv

Ptr<UniformRandomVariable> ns3::PieQueueDisc::m_uv

private

Rng stream.

Definition at line 167 of file pie-queue-disc.h.

Referenced by PieQueueDisc(), AssignStreams(), DoDispose(), and DropEarly().

◆ UNFORCED_DROP

const char* ns3::PieQueueDisc::UNFORCED_DROP

staticconstexpr

Initial value:

=

"Unforced drop"

Early probability drops: proactive.

Definition at line 89 of file pie-queue-disc.h.

Referenced by DoEnqueue(), FqPieQueueDiscL4sMode::DoRun(), and PieQueueDiscTestCase::RunPieTest().

◆ UNFORCED_MARK

const char* ns3::PieQueueDisc::UNFORCED_MARK

staticconstexpr

Initial value:

=

"Unforced mark"

Early probability marks: proactive.

Definition at line 93 of file pie-queue-disc.h.

Referenced by DoEnqueue(), FqPieQueueDiscL4sMode::DoRun(), and PieQueueDiscTestCase::RunPieTest().

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

src/traffic-control/model/pie-queue-disc.h
src/traffic-control/model/pie-queue-disc.cc

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ BurstStateT

Constructor & Destructor Documentation

◆ PieQueueDisc()

◆ ~PieQueueDisc()

Member Function Documentation

◆ AssignStreams()

◆ CalculateP()

◆ CheckConfig()

◆ DoDequeue()

◆ DoDispose()

◆ DoEnqueue()

◆ DropEarly()

◆ GetQueueDelay()

◆ GetTypeId()

◆ InitializeParams()

Friends And Related Symbol Documentation

◆ ::PieQueueDiscTestCase

Member Data Documentation

◆ CE_THRESHOLD_EXCEEDED_MARK

◆ DQCOUNT_INVALID

◆ FORCED_DROP

◆ m_a

◆ m_accuProb

◆ m_active

◆ m_activeThreshold

◆ m_avgDqRate

◆ m_b

◆ m_burstAllowance

◆ m_burstReset

◆ m_burstState

◆ m_ceThreshold

◆ m_dqCount

◆ m_dqStart

◆ m_dqThreshold

◆ m_dropProb

◆ m_inMeasurement

◆ m_isCapDropAdjustment

◆ m_markEcnTh

◆ m_maxBurst

◆ m_meanPktSize

◆ m_qDelay

◆ m_qDelayOld

◆ m_qDelayRef

◆ m_rtrsEvent

◆ m_sUpdate

◆ m_tUpdate

◆ m_useDerandomization

◆ m_useDqRateEstimator

◆ m_useEcn

◆ m_useL4s

◆ m_uv

◆ UNFORCED_DROP

◆ UNFORCED_MARK