From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: HTB accuracy on 10GbE
Date: Wed, 04 Nov 2009 06:27:42 +0100
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Cc: Stephen Hemminger <shemminger@vyatta.com>,
	Patrick McHardy <kaber@trash.net>,
	Linux Netdev List <netdev@vger.kernel.org>,
	takano-ryousei@aist.go.jp
To: Ryousei Takano <ryousei@gmail.com>
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Eric Dumazet a =E9crit :
>=20
> Hmm, do you know part of the error comes from the user tool itself ?
>=20
> If you check iperf results at sender and receiver you'll see differen=
t
> values, sender lies a bit.
>=20
> Tried here on a Gbit link (I dont have 10Gbe yet)
>=20
> $ ./iperf.bench.sh
> .100 104
> .200 206
> .300 307
> .400 413
> .500 515
> .600 610
> .700 715
> .800 822
> .900 913
> 1.000 945
>=20
(that was with standard 1500 MTU)

Now, with 9000 MTU and 50 seconds samples (instead of 5 s) I get :

$ ./iperf.bench.sh
=2E100 101
=2E200 200
=2E300 301
=2E400 401
=2E500 500
=2E600 601
=2E700 700
=2E800 803
=2E900 903
1.000 991

Not too bad :)