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From: Georgios Amanakis <gamanakis@gmail.com>
Date: Fri, 1 Jun 2018 15:03:31 -0400
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Cc: Jonathan Morton <chromatix99@gmail.com>,
 Cake List <cake@lists.bufferbloat.net>
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Subject: Re: [Cake] Lockup at high speeds
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I cannot reproduce this using veth.
I am on latest net-next with upstream-4.18 and running Dave's veth with:
server --- delay --- isp --- mbox --- client

server, delay, isp boxes have noqueue qdiscs.
mbox has cake set at "datacentre" in unlimited mode.
This setup achieves ~12gbit/s in both directions (~24gbit/s total) on
my machine.

Could you share your kernel configuration?

George