How to do Queuing delay measurements in openwrt

Installing and Using OpenWrt
1

HI all,
As part of my research, I have to find the queuing delay during traffic. But tc-s qdisc show dev phy1-ap0 always gives 0. Please help me to understand how to do queuing delay in OpenWrt.
Thank you in advance.

2

That (phy1-ap0) is a wireless device and would not usually have a queue discipline (qdisc noqueue). That noqueue means no software queuing at all.

3

is there anyway i can add so that i can measure queuing delay in some way.