From: Dave Taht <dave.taht@gmail.com>
To: Tobias Diedrich <ranma+openwrt@tdiedrich.de>
Cc: codel@lists.bufferbloat.net,
OpenWrt Development List <openwrt-devel@lists.openwrt.org>
Subject: Re: [Codel] BQL support in Ethernet drivers (and Kathie Nichols and Van Jacobson's new AQM, codel)
Date: Tue, 22 May 2012 01:27:32 +0100 [thread overview]
Message-ID: <CAA93jw7y6s6_nc3g4OgwnsMO43b1jhN=fRDvk4H71YysLRbNRA@mail.gmail.com> (raw)
In-Reply-To: <20120521214935.GA28713@yumi.tdiedrich.de>
In looking over your test scripts and results, it seems possible you
have gso on.
ethtool -K the_device tso off
ethtool -K the_device gso off
ethtool -K the_device ufo off
Secondly, in the 100Mbit and below case, I have found BQL's estimates
to be persistently on the high side, and have generally found that a
byte queue limit of 3000 or 4500 produces optimal, consistent results.
Usually 1500 causes starvation. YMMV.
On Mon, May 21, 2012 at 10:49 PM, Tobias Diedrich
<ranma+openwrt@tdiedrich.de> wrote:
> Rick Jones wrote:
>> On 05/20/2012 08:48 PM, Dave Taht wrote:
>> >Thx for the numbers!
>> >
>> >Could you do a TCP_RR while under load from UDP_STREAM?
>>
>> If you want to generate pretty pictures while doing so, you can
>> probably tweak
>> http://www.netperf.org/svn/netperf2/trunk/doc/examples/bloat.sh
>
> How about this:
> http://tdiedrich.de/~ranma/bufferbloat-rt3050/
>
> --
> Tobias PGP: http://8ef7ddba.uguu.de
--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://www.bufferbloat.net
next prev parent reply other threads:[~2012-05-22 0:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAA93jw6TcZGpxpS=DhuHCTWBn3uq1RbzugtJ3oJmA5zx9oDP-w@mail.gmail.com>
[not found] ` <20120520212944.GK22418@yumi.tdiedrich.de>
[not found] ` <20120521003115.GO22418@yumi.tdiedrich.de>
2012-05-21 3:48 ` Dave Taht
2012-05-21 17:24 ` Rick Jones
2012-05-21 21:49 ` Tobias Diedrich
2012-05-21 22:17 ` Rick Jones
2012-05-21 22:20 ` Rick Jones
2012-05-21 23:09 ` Tobias Diedrich
2012-05-21 23:30 ` Rick Jones
2012-05-22 1:22 ` Rick Jones
2012-05-22 1:29 ` Dave Taht
2012-05-22 0:27 ` Dave Taht [this message]
2012-05-29 13:00 ` Tobias Diedrich
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