netdev - Re: Netperf UDP issue with connected sockets

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Date:   Thu, 17 Nov 2016 06:17:38 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     Rick Jones <rick.jones2@....com>, netdev@...r.kernel.org
Subject: Re: Netperf UDP issue with connected sockets

On Thu, 2016-11-17 at 14:42 +0100, Jesper Dangaard Brouer wrote:

> I can see that qdisc layer does not activate xmit_more in this case.
> 

Sure. Not enough pressure from the sender(s).

The bottleneck is not the NIC or qdisc in your case, meaning that BQL
limit is kept at a small value.

(BTW not all NIC have expensive doorbells)