From: John Heffner <jheffner@psc.edu>
To: Rick Jones <rick.jones2@hp.com>
Cc: "Baruch Even" <baruch@ev-en.org>,
"Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi>,
"David Miller" <davem@davemloft.net>,
Netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] [TCP] Sysctl: document tcp_max_ssthresh (Limited Slow-Start)
Date: Fri, 18 May 2007 16:49:08 -0400 [thread overview]
Message-ID: <464E1144.4010806@psc.edu> (raw)
In-Reply-To: <464E00E5.5050801@hp.com>
Rick Jones wrote:
> as an asside, "tcp_max_ssthresh" sounds like the maximum value ssthresh
> can take-on. is that correct, or is this more of a "once ssthresh is
> above this, behave in this new way?" If that is the case, while the
I don't like it either, but you'll have to talk to Sally Floyd about
that one.. ;)
In general, I would like the documentation to emphasize more how to set
the parameter than describe the algorithm. The max_ssthresh parameter
should ideally be set to the bottleneck queue size, or more
realistically a conservative value that's likely to be smaller than the
bottleneck queue size. When max_ssthresh is smaller than the bottleneck
queue, (limited) slow start will not overflow it until cwnd has fully
ramped up to the appropriate size.
-John
next prev parent reply other threads:[~2007-05-18 20:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-18 16:27 [PATCH] [TCP] Sysctl: document tcp_max_ssthresh (Limited Slow-Start) Ilpo Järvinen
2007-05-18 17:42 ` Baruch Even
2007-05-18 19:39 ` Rick Jones
2007-05-18 20:49 ` John Heffner [this message]
2007-05-19 7:24 ` Ilpo Järvinen
2007-05-19 7:32 ` Ilpo Järvinen
2007-05-19 7:01 ` Ilpo Järvinen
2007-05-19 7:26 ` Ilpo Järvinen
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