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From: Justin McCann <jneilm@gmail.com>
To: Jim Gettys <jg@freedesktop.org>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Traffic patterns for AQM testing.... Bursty behaviour of video players.
Date: Thu, 26 Jan 2012 15:14:14 -0500	[thread overview]
Message-ID: <CAFkTFa9eS84YtnmDh1MeM-cLLL=dcZajS7Uk=494SQ_KJVaD1g@mail.gmail.com> (raw)
In-Reply-To: <4F21B1E8.9010504@freedesktop.org>

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?  Anyone know?  I'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

  reply	other threads:[~2012-01-26 20:14 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-26 20:04 Jim Gettys
2012-01-26 20:14 ` Justin McCann [this message]
2012-01-26 20:48 ` Paul Gleichauf
2012-01-27 17:10   ` Jim Gettys
2012-01-27 18:11     ` Eggert, Lars
2012-01-27 21:42     ` Rick Jones

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