From: Andi Kleen <andi@firstfloor.org>
To: David Miller <davem@davemloft.net>
Cc: johnwheffner@gmail.com, rick.jones2@hp.com, netdev@vger.kernel.org
Subject: Re: Socket buffer sizes with autotuning
Date: Fri, 25 Apr 2008 00:21:08 +0200 [thread overview]
Message-ID: <87ej8uyjvv.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20080422.205945.229828014.davem@davemloft.net> (David Miller's message of "Tue, 22 Apr 2008 20:59:45 -0700 (PDT)")
David Miller <davem@davemloft.net> writes:
>> What is your interface txqueuelen and mtu? If you have a very large
>> interface queue, TCP will happily fill it up unless you are using a
>> delay-based congestion controller.
>
> Yes, that's the fundamental problem with loss based congestion
> control. If there are any queues in the path, TCP will fill them up.
That just means Linux does too much queueing by default. Perhaps that
should be fixed. On Ethernet hardware the NIC TX queue should be
usually sufficient anyways I would guess. Do we really need the long
qdisc queue too?
-Andi
next prev parent reply other threads:[~2008-04-24 22:21 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-23 0:38 Socket buffer sizes with autotuning Rick Jones
2008-04-23 2:17 ` John Heffner
2008-04-23 3:59 ` David Miller
2008-04-23 16:32 ` Rick Jones
2008-04-23 16:58 ` John Heffner
2008-04-23 17:24 ` Rick Jones
2008-04-23 17:41 ` John Heffner
2008-04-23 17:46 ` Rick Jones
2008-04-24 22:21 ` Andi Kleen [this message]
2008-04-24 22:39 ` John Heffner
2008-04-25 1:28 ` David Miller
[not found] ` <65634d660804242234w66455bedve44801a98e3de9d9@mail.gmail.com>
2008-04-25 6:36 ` David Miller
2008-04-25 7:42 ` Tom Herbert
2008-04-25 7:46 ` David Miller
2008-04-28 17:51 ` Tom Herbert
-- strict thread matches above, loose matches on Subject: below --
2008-04-23 23:29 Jerry Chu
2008-04-24 16:32 ` John Heffner
2008-04-25 0:49 ` Jerry Chu
2008-04-25 6:46 ` David Miller
2008-04-25 21:29 ` Jerry Chu
2008-04-25 21:35 ` David Miller
2008-04-28 18:30 ` Jerry Chu
2008-04-28 19:21 ` John Heffner
2008-04-28 20:44 ` Jerry Chu
[not found] ` <d1c2719f0804281338j3984cf2bga31def0c2c1192a1@mail.gmail.com>
2008-04-28 23:28 ` John Heffner
2008-04-28 23:35 ` David Miller
2008-04-29 2:20 ` Jerry Chu
2008-04-25 7:05 ` David Miller
2008-05-07 3:57 ` Jerry Chu
2008-05-07 4:27 ` David Miller
2008-05-07 18:36 ` Jerry Chu
2008-05-07 21:18 ` David Miller
2008-05-08 1:37 ` Jerry Chu
2008-05-08 1:43 ` David Miller
2008-05-08 3:33 ` Jerry Chu
2008-05-12 22:22 ` Jerry Chu
2008-05-12 22:29 ` David Miller
2008-05-12 22:31 ` David Miller
2008-05-13 3:56 ` Jerry Chu
2008-05-13 3:58 ` David Miller
2008-05-13 4:00 ` Jerry Chu
2008-05-13 4:02 ` David Miller
2008-05-17 1:13 ` Jerry Chu
2008-05-17 1:29 ` David Miller
2008-05-17 1:47 ` Jerry Chu
2008-05-12 22:58 ` Jerry Chu
2008-05-12 23:01 ` David Miller
2008-05-07 4:28 ` David Miller
2008-05-07 18:54 ` Jerry Chu
2008-05-07 21:20 ` David Miller
2008-05-08 0:16 ` Jerry Chu
[not found] <d1c2719f0804241829s1bc3f41ejf7ebbff73ed96578@mail.gmail.com>
2008-04-25 7:06 ` Andi Kleen
2008-04-25 7:28 ` David Miller
2008-04-25 7:48 ` Andi Kleen
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