From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Difficulties to get 1Gbps on be2net ethernet card
Date: Wed, 30 May 2012 08:48:56 +0200
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To: Jean-Michel Hautbois <jhautbois@gmail.com>
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On Wed, 2012-05-30 at 08:28 +0200, Jean-Michel Hautbois wrote:

> If this can help, setting tx queue length to 5000 seems to make the
> problem disappear.

Then you should have drops at Qdisc layer (before your change to 5000)

tc -s -d qdisc

> I didn't specified it : MTU is 4096, UDP packets are 4000 bytes.