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Date: Mon, 21 Jun 2010 12:59:49 +0700 (ICT)
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From: Olivier Nicole <Olivier.Nicole@cs.ait.ac.th>
To: smithi@nimnet.asn.au
In-reply-to: <20100621134020.X9227@sola.nimnet.asn.au> (message from Ian Smith
	on Mon, 21 Jun 2010 15:50:05 +1000 (EST))
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Cc: freebsd-questions@pp.dyndns.biz, freebsd-questions@freebsd.org,
	modulok@gmail.com
Subject: Re: Online gaming and file downloads - latency hell!
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Hi,

 > I've read about people trying
 > to throttle outgoing ACKs to slow down their download but that still
 > wouldn't rearrange any incoming data packets so I don't see how that
 > would help. I haven't tried it myself though but neither have I read
 > about anyone successfully accomplishing this.

TCP uses a window: the maximum number of packects that you can receive
before you send an ACK. As long as ACK come flowing, the window size
increases.

Limit the ACK, you limit/reduce the size of the window, so you
limit/reduce the incoming trafic.

I beleive there could even be some nasty rewritting that would
artifically change the window size so the TCP stream is slowed down.

Bests,

olivier