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Date: Thu, 26 Jan 2012 15:14:14 -0500
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From: Justin McCann <jneilm@gmail.com>
To: Jim Gettys <jg@freedesktop.org>
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Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Traffic patterns for AQM testing.... Bursty behaviour
 of video players.
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On Thu, Jan 26, 2012 at 3:04 PM, Jim Gettys <jg@freedesktop.org> wrote:
>...
> The interesting question is what do current operating systems/standards
> do to the TCP window when idle? =A0Anyone know? =A0I'm making a (possibly
> poor) presumption that they are using single TCP connections; I should
> probably take some traces....

You're looking for "congestion window validation" or "congestion
window decay" from RFC2861.

I believe the function you're looking for in Linux is tcp_cwnd_validate()
  http://lxr.linux.no/linux+v3.2.2/net/ipv4/tcp_output.c#L1287

    Justin