netdev - TSN - tc usage for a tbs setup

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Date:   Thu, 25 Jul 2019 08:50:08 +0200
From:   Stéphane Ancelot <sancelot@...alliance.com>
To:     netdev@...r.kernel.org
Subject: TSN - tc usage for a tbs setup

Hi,

I am trying to setup my network queue for offline time based configuration.

initial setup is :

tc qdisc show dev eth1:

qdisc mq 0: root

qdisc pfifo_fast 0: parent :1 bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 
1 1 1


I won't need pfifo , I have to send one frame at a precise xmit time 
(high prio), and then maybe some other frames (with low priority)


I want to setup offload time based  xmit.

/sbin/tc qdisc add dev eth1 root handle 100:1 etf delta 100000 clockid 
CLOCK_REALTIME offload

replies with

RTNETLINK answers: Invalid argument


What is wrong ?

Regards,

S.Ancelot