An implementation of PRR. More...
#include "tcp-prr-recovery.h"
Public Types | |
enum | ReductionBound_t { CRB , SSRB } |
Reduction Bound variant (CRB or SSRB) More... | |
Public Member Functions | |
TcpPrrRecovery () | |
Create an unbound tcp socket. | |
TcpPrrRecovery (const TcpPrrRecovery &sock) | |
Copy constructor. | |
~TcpPrrRecovery () override | |
void | DoRecovery (Ptr< TcpSocketState > tcb, uint32_t deliveredBytes) override |
Performs recovery based on the recovery algorithm. | |
void | EnterRecovery (Ptr< TcpSocketState > tcb, uint32_t dupAckCount, uint32_t unAckDataCount, uint32_t deliveredBytes) override |
Performs variable initialization at the start of recovery. | |
void | ExitRecovery (Ptr< TcpSocketState > tcb) override |
Performs cwnd adjustments at the end of recovery. | |
Ptr< TcpRecoveryOps > | Fork () override |
Copy the recovery algorithm across socket. | |
std::string | GetName () const override |
Get the name of the recovery algorithm. | |
void | UpdateBytesSent (uint32_t bytesSent) override |
Keeps track of bytes sent during recovery phase. | |
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TcpClassicRecovery () | |
Constructor. | |
TcpClassicRecovery (const TcpClassicRecovery &recovery) | |
Copy constructor. | |
~TcpClassicRecovery () override | |
Constructor. | |
void | DoRecovery (Ptr< TcpSocketState > tcb, uint32_t deliveredBytes) override |
Performs recovery based on the recovery algorithm. | |
void | EnterRecovery (Ptr< TcpSocketState > tcb, uint32_t dupAckCount, uint32_t unAckDataCount, uint32_t deliveredBytes) override |
Performs variable initialization at the start of recovery. | |
void | ExitRecovery (Ptr< TcpSocketState > tcb) override |
Performs cwnd adjustments at the end of recovery. | |
Ptr< TcpRecoveryOps > | Fork () override |
Copy the recovery algorithm across socket. | |
std::string | GetName () const override |
Get the name of the recovery algorithm. | |
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TcpRecoveryOps () | |
Constructor. | |
TcpRecoveryOps (const TcpRecoveryOps &other) | |
Copy constructor. | |
~TcpRecoveryOps () override | |
Deconstructor. | |
virtual void | DoRecovery (Ptr< TcpSocketState > tcb, uint32_t deliveredBytes)=0 |
Performs recovery based on the recovery algorithm. | |
virtual void | EnterRecovery (Ptr< TcpSocketState > tcb, uint32_t dupAckCount, uint32_t unAckDataCount, uint32_t deliveredBytes)=0 |
Performs variable initialization at the start of recovery. | |
virtual void | ExitRecovery (Ptr< TcpSocketState > tcb)=0 |
Performs cwnd adjustments at the end of recovery. | |
virtual Ptr< TcpRecoveryOps > | Fork ()=0 |
Copy the recovery algorithm across socket. | |
virtual std::string | GetName () const =0 |
Get the name of the recovery algorithm. | |
virtual void | UpdateBytesSent (uint32_t bytesSent) |
Keeps track of bytes sent during recovery phase. | |
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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. | |
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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. | |
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virtual | ~ObjectBase () |
Virtual destructor. | |
void | GetAttribute (std::string name, AttributeValue &value) 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. | |
virtual TypeId | GetInstanceTypeId () const =0 |
Get the most derived TypeId for this Object. | |
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. | |
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static TypeId | GetTypeId () |
Get the type ID. | |
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static TypeId | GetTypeId () |
Get the type ID. | |
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static TypeId | GetTypeId () |
Register this type. | |
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static TypeId | GetTypeId () |
Get the type ID. | |
Private Attributes | |
uint32_t | m_prrDelivered {0} |
total bytes delivered during recovery phase | |
uint32_t | m_prrOut {0} |
total bytes sent during recovery phase | |
uint32_t | m_recoveryFlightSize {0} |
value of bytesInFlight at the start of recovery phase | |
ReductionBound_t | m_reductionBoundMode {SSRB} |
mode of Reduction Bound to be used | |
Additional Inherited Members | |
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Object (const Object &o) | |
Copy an Object. | |
virtual void | DoDispose () |
Destructor implementation. | |
virtual void | DoInitialize () |
Initialize() implementation. | |
virtual void | NotifyNewAggregate () |
Notify all Objects aggregated to this one of a new Object being aggregated. | |
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void | ConstructSelf (const AttributeConstructionList &attributes) |
Complete construction of ObjectBase; invoked by derived classes. | |
virtual void | NotifyConstructionCompleted () |
Notifier called once the ObjectBase is fully constructed. | |
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static TypeId | GetObjectIid () |
Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly. | |
An implementation of PRR.
Introspection did not find any typical Config paths.
PRR is an algorithm that determines TCP's sending rate in fast recovery. PRR avoids excessive window reductions and aims for the actual congestion window size at the end of recovery to be as close as possible to the window determined by the congestion control algorithm. PRR also improves accuracy of the amount of data sent during loss recovery.
CRB|SSRB
No TraceSources are defined for this type.
Size of this type is 48 bytes (on a 64-bit architecture).
Definition at line 42 of file tcp-prr-recovery.h.
Reduction Bound variant (CRB or SSRB)
Enumerator | |
---|---|
CRB | Conservative Reduction Bound. |
SSRB | Slow Start Reduction Bound. |
Definition at line 67 of file tcp-prr-recovery.h.
ns3::TcpPrrRecovery::TcpPrrRecovery | ( | ) |
Create an unbound tcp socket.
Definition at line 50 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
ns3::TcpPrrRecovery::TcpPrrRecovery | ( | const TcpPrrRecovery & | sock | ) |
Copy constructor.
sock | the object to copy |
Definition at line 56 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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override |
Definition at line 66 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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overridevirtual |
Performs recovery based on the recovery algorithm.
The function is called on arrival of every ack when TcpSocketState is set to CA_RECOVERY. It performs the necessary cwnd changes as per the recovery algorithm.
tcb | internal congestion state |
deliveredBytes | bytes (S)ACKed in the last (S)ACK |
Implements ns3::TcpRecoveryOps.
Definition at line 87 of file tcp-prr-recovery.cc.
References CRB, m_prrDelivered, m_prrOut, m_recoveryFlightSize, m_reductionBoundMode, NS_LOG_FUNCTION, and SSRB.
Referenced by EnterRecovery().
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overridevirtual |
Performs variable initialization at the start of recovery.
The function is called when the TcpSocketState is changed to CA_RECOVERY.
tcb | internal congestion state |
dupAckCount | duplicate acknowldgement count |
unAckDataCount | total bytes of data unacknowledged |
deliveredBytes | bytes (S)ACKed in the last (S)ACK |
Implements ns3::TcpRecoveryOps.
Definition at line 72 of file tcp-prr-recovery.cc.
References DoRecovery(), m_prrDelivered, m_prrOut, m_recoveryFlightSize, and NS_LOG_FUNCTION.
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overridevirtual |
Performs cwnd adjustments at the end of recovery.
The function is called when the TcpSocketState is changed from CA_RECOVERY.
tcb | internal congestion state |
Implements ns3::TcpRecoveryOps.
Definition at line 126 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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overridevirtual |
Copy the recovery algorithm across socket.
Implements ns3::TcpRecoveryOps.
Definition at line 140 of file tcp-prr-recovery.cc.
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overridevirtual |
Get the name of the recovery algorithm.
Implements ns3::TcpRecoveryOps.
Definition at line 146 of file tcp-prr-recovery.cc.
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static |
Get the type ID.
Definition at line 36 of file tcp-prr-recovery.cc.
References CRB, m_reductionBoundMode, ns3::MakeEnumAccessor(), ns3::MakeEnumChecker(), ns3::TypeId::SetParent(), and SSRB.
Referenced by ns3::TcpL4Protocol::GetTypeId().
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overridevirtual |
Keeps track of bytes sent during recovery phase.
The function is called whenever a data packet is sent during recovery phase (optional).
bytesSent | bytes sent |
Reimplemented from ns3::TcpRecoveryOps.
Definition at line 133 of file tcp-prr-recovery.cc.
References m_prrOut, and NS_LOG_FUNCTION.
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private |
total bytes delivered during recovery phase
Definition at line 89 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), and EnterRecovery().
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private |
total bytes sent during recovery phase
Definition at line 90 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), EnterRecovery(), and UpdateBytesSent().
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private |
value of bytesInFlight at the start of recovery phase
Definition at line 91 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), and EnterRecovery().
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private |
mode of Reduction Bound to be used
Definition at line 92 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), and GetTypeId().