From: John Heffner <jheffner@psc.edu>
To: lists@limebrokerage.com
Cc: "David S. Miller" <davem@davemloft.net>,
linux-net@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels
Date: Fri, 2 Sep 2005 10:10:18 -0400 [thread overview]
Message-ID: <6064b8272aa4562242eb60eb75c7cdae@psc.edu> (raw)
In-Reply-To: <Pine.LNX.4.61.0509020948350.6083@guppy.limebrokerage.com>
On Sep 2, 2005, at 10:05 AM, lists@limebrokerage.com wrote:
> This particular Win2k sender sends _only_ real-time data, it's not
> capable of rewinding. So it's always sending small packets, from start
> to finish, yet the problem still occurs.
>
> Note that even real-time data can end up generating a stream of
> full-size packets occassionally. It's just very unlikely they would
> occur at the start of the flow, as market data is very thin in the
> pre-market open hours.
The rcv_ssthresh growth can actually take place anywhere in the flow,
not just at the beginning.
>> But, that window clamping should fix the problem, as we recalculate
>> the window to advertise.
>
> Patches for testing are very much welcome...
Have you tried increasing the size of the receive buffer yet?
-John
next prev parent reply other threads:[~2005-09-02 14:10 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-01 22:30 Possible BUG in IPv4 TCP window handling, all recent 2.4.x/2.6.x kernels Ion Badulescu
2005-09-01 22:43 ` David S. Miller
2005-09-01 22:49 ` Jesper Juhl
2005-09-01 22:53 ` David S. Miller
2005-09-01 22:53 ` Ion Badulescu
2005-09-01 23:37 ` Jesper Juhl
2005-09-02 2:51 ` John Heffner
2005-09-02 6:28 ` David S. Miller
2005-09-02 14:05 ` lists
2005-09-02 14:10 ` John Heffner [this message]
2005-09-02 14:33 ` lists
2005-09-02 14:48 ` John Heffner
2005-09-02 15:43 ` Ion Badulescu
2005-09-02 13:02 ` Guillaume Autran
2005-09-02 13:48 ` Ion Badulescu
2005-09-02 13:52 ` Alexey Kuznetsov
2005-09-02 14:11 ` John Heffner
[not found] ` <43185E81.2070300@mrv.com>
[not found] ` <20050902154424.GA15060@yakov.inr.ac.ru>
2005-09-02 16:18 ` Guillaume Autran
[not found] ` <431877EE.6010101@mrv.com>
2005-09-02 17:32 ` Alexey Kuznetsov
2005-09-02 18:56 ` Guillaume Autran
2005-09-02 21:08 ` Alexey Kuznetsov
2005-09-02 13:48 ` Alexey Kuznetsov
2005-09-02 14:16 ` John Heffner
2005-09-02 15:11 ` Alexey Kuznetsov
2005-09-02 18:36 ` Alexey Kuznetsov
2005-09-02 20:57 ` Ion Badulescu
2005-09-02 21:18 ` Alexey Kuznetsov
2005-09-02 23:09 ` Ion Badulescu
2005-09-28 16:31 ` Ion Badulescu
2005-09-29 15:17 ` Alexey Kuznetsov
2005-09-29 15:34 ` Guillaume Autran
2005-09-29 16:04 ` John Heffner
2005-09-29 18:16 ` David S. Miller
2005-09-30 0:29 ` David S. Miller
2005-09-02 4:51 ` Noritoshi Demizu
2005-09-02 5:20 ` Stephen Hemminger
2005-09-02 5:45 ` Noritoshi Demizu
2005-09-02 6:11 ` Noritoshi Demizu
2005-09-02 12:11 ` Ion Badulescu
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