Drop-tail queue, to be used in network interfaces. Conforms to the IOutputQueue interface.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Used in compound modules

Name	Type	Description
DiffservQueue	compound module	This is an example queue, that can be used in interfaces of DS core and edge nodes to support the AFxy (RFC 2597) and EF (RFC 3246) PHBs.
EtherQoSQueue	compound module	Queue module that gives the PAUSE frames a higher priority, and can be parametrized with an IOutputQueue for serving the other frames.

Parameters

Name	Type	Default value	Description
frameCapacity	int	100
queueName	string	"l2queue"	name of the inner cQueue object, used in the 'q' tag of the display string

Properties

Name	Value	Description
display	i=block/queue

Gates

Name	Direction	Size	Description
in	input
out	output

Signals

Name	Type	Unit
queueLength	long
queueingTime	simtime_t	s
dequeuePk	cPacket
dropPkByQueue	cPacket
rcvdPk	cPacket
enqueuePk	cPacket

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
queueLength	queue length		max, timeavg, vector		sample-hold
queueingTime	queueing time		histogram, vector		none
dropPk	dropped packets	dropPkByQueue	count, sum(packetBytes), vector(packetBytes)		none
rcvdPk	received packets		count, sum(packetBytes), vector(packetBytes)		none

Source code

//
// Drop-tail queue, to be used in network interfaces.
// Conforms to the ~IOutputQueue interface.
//
simple DropTailQueue like IOutputQueue
{
    parameters:
        int frameCapacity = default(100);
        string queueName = default("l2queue"); // name of the inner cQueue object, used in the 'q' tag of the display string
        @display("i=block/queue");
        @signal[rcvdPk](type=cPacket);
        @signal[enqueuePk](type=cPacket);
        @signal[dequeuePk](type=cPacket);
        @signal[dropPkByQueue](type=cPacket);
        @signal[queueingTime](type=simtime_t; unit=s);
        @signal[queueLength](type=long);
        @statistic[rcvdPk](title="received packets"; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[dropPk](title="dropped packets"; source=dropPkByQueue; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[queueingTime](title="queueing time"; record=histogram,vector; interpolationmode=none);
        @statistic[queueLength](title="queue length"; record=max,timeavg,vector; interpolationmode=sample-hold);
    gates:
        input in;
        output out;
}

File: src/inet/common/queue/DropTailQueue.ned

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