drcl.inet.core.queue
Class RED

java.lang.Object
  drcl.DrclObj
      drcl.comp.queue.QLogic
          drcl.inet.core.queue.RED

All Implemented Interfaces:

java.lang.Cloneable, ObjectCloneable, ObjectDuplicable, java.io.Serializable

Direct Known Subclasses:

FRED

public class RED

extends QLogic

The Random Early Detection (RED) queue logic.

See Also:

Serialized Form

Field Summary

static java.lang.String	EVENT_AVG_QSIZE Name of the average queue size change event.
static boolean	RED_EWMA
static boolean	RED_HOLT_WINTERS

Fields inherited from class drcl.comp.queue.QLogic

capacity, EVENT_QSIZE, qlen, qsize

Constructor Summary

RED()

RED(Component host_, java.lang.String avgpid_)

RED(Component host_, java.lang.String avgpid_, java.lang.String qpid_)

Method Summary

java.lang.String	adviceOn(java.lang.Object obj_, int psize_) Returns advice (in String) on whether or not to drop the packet.
void	dequeueHandler(java.lang.Object obj_, int psize_) Handles the event of dequeuing the object of the given size.
void	duplicate(java.lang.Object source_) Duplicates the content of the source object to this object.
void	enqueueHandler(java.lang.Object obj_, int psize_) Handles the event of enqueuing the object of the given size.
double	getBandwidth()
double	getInvProb()
double	getMaxThresh()
int	getMeanPacketSize()
double	getMinThresh()
long	getSeed()
double	getWeight()
java.lang.String	info(java.lang.String prefix_) Prints the content (states) of this queue management instance.
boolean	isMarkEnabled()
boolean	isWait()
void	reset() Resets this object to the initial state.
void	setAvgQSizePort(java.lang.String avgqspid_)
void	setBandwidth(double bw_)
void	setInvProb(double value)
void	setMarkEnabled(boolean enabled_) If enabled, RED marks the congestion bit of, instead of advising to drop, packets.
void	setMaxThresh(double max)
void	setMeanPacketSize(int size_)
void	setMinThresh(double min)
void	setRandomNumberGenerator(RandomNumberGenerator ug_)
void	setRandomNumberGenerator(RandomNumberGenerator ug_, long seed_)
void	setREDParam(int psize_, double bw_, double th_max_, double th_min_, double inv_max_p_, double qw_) Sets up all RED parameters.
void	setSeed(long seed_)
void	setWait(boolean enabled_)
void	setWeight(double weight)

Methods inherited from class drcl.comp.queue.QLogic

dropHandler, getCapacity, getCurrentQLength, getCurrentQSize, getHost, info, isEmpty, isFull, set, setCapacity, setHost, setQSizePort

Methods inherited from class drcl.DrclObj

clone, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

RED_EWMA

public static boolean RED_EWMA

RED_HOLT_WINTERS

public static boolean RED_HOLT_WINTERS

EVENT_AVG_QSIZE

public static final java.lang.String EVENT_AVG_QSIZE

Name of the average queue size change event.

See Also:

Constant Field Values

Constructor Detail

RED

public RED()

RED

public RED(Component host_,
           java.lang.String avgpid_)

Parameters:

avgpid_ - ID of the average queue size change event port that will be created at the host component.

RED

public RED(Component host_,
           java.lang.String avgpid_,
           java.lang.String qpid_)

Parameters:

avgpid_ - ID of the average queue size change event port that will be created at the host component.

qpid_ - ID of the instant queue size change event port that will be created at the host component.

Method Detail

reset

public void reset()

Description copied from class: QLogic

Resets this object to the initial state. Subclasses must call super.reset() when overriding this method.

Overrides:

reset in class QLogic

duplicate

public void duplicate(java.lang.Object source_)

Description copied from class: QLogic

Duplicates the content of the source object to this object. If the host component is already set, this method also creates the queue size change event port of the same ID as that in source_. Subclasses must call super.duplicate() when overriding this method.

Specified by:

duplicate in interface ObjectDuplicable

Overrides:

duplicate in class QLogic

info

public java.lang.String info(java.lang.String prefix_)

Description copied from class: QLogic

Prints the content (states) of this queue management instance.

Overrides:

info in class QLogic

Parameters:

prefix_ - prefix of each line in the printout.

adviceOn

public java.lang.String adviceOn(java.lang.Object obj_,
                                 int psize_)

Returns advice (in String) on whether or not to drop the packet. Returns false if not to drop the packet.

Overrides:

adviceOn in class QLogic

Returns:

the advice; null if advicing not to drop the object.

enqueueHandler

public void enqueueHandler(java.lang.Object obj_,
                           int psize_)

Description copied from class: QLogic

Handles the event of enqueuing the object of the given size.

Overrides:

enqueueHandler in class QLogic

dequeueHandler

public void dequeueHandler(java.lang.Object obj_,
                           int psize_)

Description copied from class: QLogic

Handles the event of dequeuing the object of the given size.

Overrides:

dequeueHandler in class QLogic

setWait

public void setWait(boolean enabled_)

isWait

public boolean isWait()

setMarkEnabled

public void setMarkEnabled(boolean enabled_)

If enabled, RED marks the congestion bit of, instead of advising to drop, packets.

isMarkEnabled

public boolean isMarkEnabled()

setMeanPacketSize

public void setMeanPacketSize(int size_)

getMeanPacketSize

public int getMeanPacketSize()

setMaxThresh

public void setMaxThresh(double max)

getMaxThresh

public double getMaxThresh()

setMinThresh

public void setMinThresh(double min)

getMinThresh

public double getMinThresh()

setInvProb

public void setInvProb(double value)

getInvProb

public double getInvProb()

setWeight

public void setWeight(double weight)

getWeight

public double getWeight()

getBandwidth

public double getBandwidth()

setBandwidth

public void setBandwidth(double bw_)

setREDParam

public void setREDParam(int psize_,
                        double bw_,
                        double th_max_,
                        double th_min_,
                        double inv_max_p_,
                        double qw_)

Sets up all RED parameters. For each parameter, the default value is used if zero is given.

setSeed

public void setSeed(long seed_)

getSeed

public long getSeed()

setRandomNumberGenerator

public void setRandomNumberGenerator(RandomNumberGenerator ug_)

setRandomNumberGenerator

public void setRandomNumberGenerator(RandomNumberGenerator ug_,
                                     long seed_)

setAvgQSizePort

public void setAvgQSizePort(java.lang.String avgqspid_)