Traffic control with tc qdisc taprio

Gpapa

1/10/24, 12:19 PM

Currently, I am working on a TSN project and I am trying to implement a TSN scenario in a Ubuntu 20.04 VM.

I leverage on tc qdisc command:

tc qdisc replace dev gateway-eth0 parent root handle 100 taprio \ 
num_tc 8 \
map 0 1 2 3 4 5 6 7 1 1 1 1 1 1 1 1 \ 
queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 \ 
base-time 1000 \

clockid CLOCK_TAI \ 

sched-entry S 10 300000 \ 
sched-entry S 32 500000 \
sched-entry S 128 200000 \

And also mangle the iptables to classify the packets based on the dscp field. ip6tables

From what I have read, with this qdisc command I define:

i) 8 traffic classes ii) map priority 0 to TC0, 1 to TC1 2 to TC2 etc. iii) TC0 is mapped to one TX queue TX-0, TC1 to TX-1, TC2 to TX2 etc.

In the sched-entry part of the command, my goal is to open TC2 and TC5, and TC7 queues for different periods.

To test this I sent ping packets using ping -Q 0x40 <IP> in order to send packets to traffic class 5.

Are the sched-entries right?

Thank you.

0 + 0

traffic-shaping

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Traffic control with tc qdisc taprio

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