PacketSchedulerBase¶

simple module PacketSchedulerBase

Base module for various packet scheduler modules. Derived modules must implement a single packet scheduler function which determines the index of the input gate for the pulled packet.

See also: IPacketScheduler

Inheritance diagram¶

Known subclasses¶

Name	Type	Description
ContentBasedScheduler	simple module	Connects one packet collector to multiple packet providers. It can be pulled for packets by the connected packet collector. When this happens, the scheduler pulls a packet from one of its packet providers based on the configured packet filters. The first matching expression determines the index of the input gate.
LabelScheduler	simple module	Schedules packets based on the attached labels in a LabelsTag.
MarkovScheduler	simple module	Implements a packet scheduler using a Markov process that has as many states as input gates the scheduler has. The input gate for the next packet is determined by the current state of the Markov process.
PacketScheduler	simple module	Connects one packet collector to multiple packet providers. When the packet collector pulls a pull packet from it, the scheduler pulls a packet from one of its packet providers based on the configured scheduler function. The packet scheduler function takes a list of packet providers and returns an integer which in turn is used for determining the input gate.
PriorityScheduler	simple module	This scheduler pulls packets from the first non-empty among its connected packet providers.
WrrScheduler	simple module	Implements weighted round-robin scheduling.

Extends¶

Name	Type	Description
PacketProcessorBase	simple module	Base module for various packet processing modules which maintains a few statistics.

Parameters¶

Name	Type	Default value	Description
displayStringTextFormat	string	“scheduled %p pk (%l)”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
reverseOrder	bool	false

Properties¶

Name	Value	Description
class	PacketSchedulerBase
display	i=block/join

Gates¶

Name	Direction	Size	Description
in [ ]	input
out	output

Signals¶

Name	Type	Unit	Description
packetPulled	inet::Packet

Statistics¶

Name	Title	Source	Record	Unit	Interpolation Mode	Description
dataRate	data rate	throughput(packetPulled)	vector	bps	linear	the statistical value is the data rate of the scheduled packets
packetLengths	packet lengths	packetLength(packetPulled)	sum,histogram,vector	b	none	the statistical value is the length of the scheduled packet
packets	packets	packetPulled	count	pk		the statistical value is the scheduled packet

Source code¶

//
// Base module for various packet scheduler modules. Derived modules
// must implement a single packet scheduler function which determines the index
// of the input gate for the pulled packet.
//
// @see ~IPacketScheduler
//
simple PacketSchedulerBase extends PacketProcessorBase
{
    parameters:
        bool reverseOrder = default(false);
        displayStringTextFormat = default("scheduled %p pk (%l)");
        @class(PacketSchedulerBase);
        @display("i=block/join");
        @signal[packetPulled](type=inet::Packet);
        // the statistical value is the scheduled packet
        @statistic[packets](title="packets"; source=packetPulled; record=count; unit=pk);
        // the statistical value is the length of the scheduled packet
        @statistic[packetLengths](title="packet lengths"; source=packetLength(packetPulled); record=sum,histogram,vector; unit=b; interpolationmode=none);
        // the statistical value is the data rate of the scheduled packets
        @statistic[dataRate](title="data rate"; source=throughput(packetPulled); record=vector; unit=bps; interpolationmode=linear);
    gates:
        input in[];
        output out;
}

File: src/inet/queueing/base/PacketSchedulerBase.ned