svn commit: r300779 - in head: sbin/ipfw sys/modules/dummynet sys/netinet sys/netpfil/ipfw

[Don Lewis]

On 26 May, To: src-committers at freebsd.org wrote:
> Author: truckman
> Date: Thu May 26 21:40:13 2016
> New Revision: 300779
> URL: https://svnweb.freebsd.org/changeset/base/300779
> 
> Log:
>   Import Dummynet AQM version 0.2.1 (CoDel, FQ-CoDel, PIE and FQ-PIE).
>   
>   Centre for Advanced Internet Architectures
>   
>   Implementing AQM in FreeBSD
>   
>   * Overview <http://caia.swin.edu.au/freebsd/aqm/index.html>
>   
>   * Articles, Papers and Presentations
>     <http://caia.swin.edu.au/freebsd/aqm/papers.html>
>   
>   * Patches and Tools <http://caia.swin.edu.au/freebsd/aqm/downloads.html>
>   
>   Overview
>   
>   Recent years have seen a resurgence of interest in better managing
>   the depth of bottleneck queues in routers, switches and other places
>   that get congested. Solutions include transport protocol enhancements
>   at the end-hosts (such as delay-based or hybrid congestion control
>   schemes) and active queue management (AQM) schemes applied within
>   bottleneck queues.
>   
>   The notion of AQM has been around since at least the late 1990s
>   (e.g. RFC 2309). In recent years the proliferation of oversized
>   buffers in all sorts of network devices (aka bufferbloat) has
>   stimulated keen community interest in four new AQM schemes -- CoDel,
>   FQ-CoDel, PIE and FQ-PIE.
>   
>   The IETF AQM working group is looking to document these schemes,
>   and independent implementations are a corner-stone of the IETF's
>   process for confirming the clarity of publicly available protocol
>   descriptions. While significant development work on all three schemes
>   has occured in the Linux kernel, there is very little in FreeBSD.
>   
>   Project Goals
>   
>   This project began in late 2015, and aims to design and implement
>   functionally-correct versions of CoDel, FQ-CoDel, PIE and FQ_PIE
>   in FreeBSD (with code BSD-licensed as much as practical). We have
>   chosen to do this as extensions to FreeBSD's ipfw/dummynet firewall
>   and traffic shaper. Implementation of these AQM schemes in FreeBSD
>   will:
>   * Demonstrate whether the publicly available documentation is
>     sufficient to enable independent, functionally equivalent implementations
>   
>   * Provide a broader suite of AQM options for sections the networking
>     community that rely on FreeBSD platforms
>   
>   Program Members:
>   
>   * Rasool Al Saadi (developer)
>   
>   * Grenville Armitage (project lead)
>   
>   Acknowledgements:
>   
>   This project has been made possible in part by a gift from the
>   Comcast Innovation Fund.
>   
>   Submitted by:	Rasool Al-Saadi <ralsaadi at swin.edu.au>
>   X-No objection:	core
>   MFC after:	2 weeks
>   Differential Revision:	https://reviews.freebsd.org/D6388

Sigh ... should also be:

Relnotes:	yes