WRRScheduler

simple module

This module implements weighted round-robin scheduling.

There is a weight associated with each input gate. Initially each input gate gets as many tokens as their weight. When a packet is requested then the first input gate is selected that has a packet and enough tokens, and one token is consumed. When there are waiting input packets, but there is no enough tokens to schedule one, then each token bucket is filled up.

This module implements the IPassiveQueue C++ interface, therefore it can be used as the queue component of a NIC, and as the input of another scheduler.

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.

Parameters

Name	Type	Default value	Description
weights	string

Properties

Name	Value	Description
display	i=block/server

Gates

Name	Direction	Size	Description
in [ ]	input
out	output

Source code

//
// This module implements weighted round-robin scheduling.
//
// There is a weight associated with each input gate.
// Initially each input gate gets as many tokens as their
// weight. When a packet is requested then the first input
// gate is selected that has a packet and enough tokens,
// and one token is consumed. When there are waiting input
// packets, but there is no enough tokens to schedule one,
// then each token bucket is filled up.
//
// This module implements the IPassiveQueue C++ interface,
// therefore it can be used as the queue component of a NIC,
// and as the input of another scheduler.
//
simple WRRScheduler
{
    parameters:
        string weights;
        @display("i=block/server");

    gates:
        input in[];
        output out;
}

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