On Fri, Dec 23, 2016 at 6:03 PM, Dave Taht <dave.taht@gmail.com> wrote:
The simplest way to verify if you have the airtime fairness stuff is
to look for a sysfs file named "airtime". The best way to test it is
to drive more than one wifi device over it simultaneously from a wired
link, and not through the ISP link.

/sys/kernel/debug/ieee80211/phy[N]/ath9k/airtime_flags?
 

flent -H device1 -H device2 -H device1 -H device2 rtt_fair_up # example

What is your wifi client presently?

Mid 2015 MacBook Pro, very short range (<10 feet).  My test bed is down for the evening, sadly.