From: Hagen Paul Pfeifer <hagen@jauu.net>
To: dccp@vger.kernel.org
Subject: Re: [PATCH] tcp: Increase the initial congestion window to 10.
Date: Thu, 03 Feb 2011 14:00:28 +0000 [thread overview]
Message-ID: <47859e9273bb0c1b2c32fc1adfa450ee@localhost> (raw)
In-Reply-To: <20110202.170750.229739784.davem@davemloft.net>
On Wed, 02 Feb 2011 17:07:50 -0800 (PST), David Miller wrote:
> +/* TCP initial congestion window */
> +#define TCP_INIT_CWND 10
> +
Davem, there is _no_ research how this huge IW will behave in environments
with a small BDP. Belief it or not, but there are networks out there with a
BDP similar to ~1980. Why for heaven's sake should this work in these
environments? There are only _two_ extensive analysis one from Cherry and
and one from Ilpo. Both analysis focus on current mainstream BDP. I started
to setup a ns-2 environment but due to lack of time I am a little bit
behind schedule. Anyway, why not make this a tunable per route knob so that
it is easier to fix things, e.g. set IW back to 3.
HGN
WARNING: multiple messages have this Message-ID (diff)
From: Hagen Paul Pfeifer <hagen@jauu.net>
To: David Miller <davem@davemloft.net>
Cc: <netdev@vger.kernel.org>, <dccp@vger.kernel.org>, <therbert@google.com>
Subject: Re: [PATCH] tcp: Increase the initial congestion window to 10.
Date: Thu, 03 Feb 2011 15:00:28 +0100 [thread overview]
Message-ID: <47859e9273bb0c1b2c32fc1adfa450ee@localhost> (raw)
In-Reply-To: <20110202.170750.229739784.davem@davemloft.net>
On Wed, 02 Feb 2011 17:07:50 -0800 (PST), David Miller wrote:
> +/* TCP initial congestion window */
> +#define TCP_INIT_CWND 10
> +
Davem, there is _no_ research how this huge IW will behave in environments
with a small BDP. Belief it or not, but there are networks out there with a
BDP similar to ~1980. Why for heaven's sake should this work in these
environments? There are only _two_ extensive analysis one from Cherry and
and one from Ilpo. Both analysis focus on current mainstream BDP. I started
to setup a ns-2 environment but due to lack of time I am a little bit
behind schedule. Anyway, why not make this a tunable per route knob so that
it is easier to fix things, e.g. set IW back to 3.
HGN
next prev parent reply other threads:[~2011-02-03 14:00 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-03 1:07 [PATCH] tcp: Increase the initial congestion window to 10 David Miller
2011-02-03 1:07 ` David Miller
2011-02-03 1:53 ` Eric Dumazet
2011-02-03 1:53 ` Eric Dumazet
2011-02-03 2:25 ` Nandita Dukkipati
2011-02-03 2:25 ` Nandita Dukkipati
2011-02-03 3:34 ` David Miller
2011-02-03 3:34 ` David Miller
2011-02-03 14:00 ` Hagen Paul Pfeifer [this message]
2011-02-03 14:00 ` Hagen Paul Pfeifer
2011-02-03 14:17 ` John Heffner
2011-02-03 14:17 ` John Heffner
2011-02-03 14:26 ` Hagen Paul Pfeifer
2011-02-03 14:26 ` Hagen Paul Pfeifer
2011-02-03 14:43 ` Hagen Paul Pfeifer
2011-02-03 14:43 ` Hagen Paul Pfeifer
2011-02-03 20:28 ` Yuchung Cheng
2011-02-03 21:17 ` H.K. Jerry Chu
2011-02-03 21:17 ` H.K. Jerry Chu
2011-02-03 22:00 ` Leandro Melo de Sales
2011-02-03 22:00 ` Leandro Melo de Sales
2011-02-03 22:43 ` Ilpo Järvinen
2011-02-03 23:54 ` Yuchung Cheng
2011-02-04 19:50 ` Ilpo Järvinen
2011-02-04 2:01 ` H.K. Jerry Chu
2011-02-04 19:43 ` Ilpo Järvinen
2011-02-05 3:39 ` Jerry Chu
2011-02-03 22:55 ` Hagen Paul Pfeifer
2011-02-03 22:55 ` Hagen Paul Pfeifer
2011-02-04 8:38 ` Alexander Zimmermann
2011-02-04 8:38 ` Alexander Zimmermann
2011-02-05 13:57 ` Gerrit Renker
2011-02-05 13:57 ` Gerrit Renker
2011-02-05 13:58 ` Gerrit Renker
2011-02-05 13:58 ` Gerrit Renker
2011-02-06 2:14 ` David Miller
2011-02-06 2:14 ` David Miller
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