[Battlemesh] bufferbloat

[ZioPRoTo (Saverio Proto)]

Forwarded with permission of the author. It is a reply to the
announcement that was direct to me.


---------- Forwarded message ----------
From: Dave Täht <d+dontspamme at taht.net>
Date: 2011/1/17
Subject: Re: Announcing the Wireless Battle Mesh v4 (16-20 March 2011,
Sant Bartomeu del Grau, Spain)
To: "ZioPRoTo (Saverio Proto)" <zioproto at gmail.com>


"ZioPRoTo (Saverio Proto)" <zioproto at gmail.com> writes:

>> I hope you guys take a hard look at bufferbloat. It proved to
>> be an issue on my babel based + ath9k wireless mesh in Nicaragua.
>
> I don't know what you are talking about,
> maybe you want to start this discussion on the battlemesh mailing list ?
>
> Saverio

http://en.wikipedia.org/wiki/Bufferbloat

Lots of discussion on Getty's blog.

http://gettys.wordpress.com/2010/12/03/introducing-the-criminal-mastermind-bufferbloat/

He (and I) witnessed OLPC and other mesh networks in congestion collapse
without understanding why until recently. Multiple other people have
confirmed the issue on various other wireless networks.

Bufferbloat mostly affects newer wireless devices that have excessive
buffering in their tx dma queues, but also huge txqueuelens are doing us
in!

Simple experiments you can perform:

http://gettys.wordpress.com/2010/12/02/home-router-puzzle-piece-two-fun-with-wireless/

I'll join the list but I'm a little busy right now. If you would poke
the list with links like this it might provoke some discussion....

--
Dave Taht
http://nex-6.taht.net