FWIW I am trying to test the "reverse" of the flent rtt_fair test above (i.e. flent on lan client using "servers" on wifi clients. No netem required here - this is what I get with 3 clients, two of which in somewhat wifi challenged locations.
avg median # data pts
Ping (ms) ICMP1 56//1 : 40.55 41.50 ms 350
Ping (ms) ICMP2 59 : 308.40 144.00 ms 350
Ping (ms) ICMP3 56//2 : 40.34 41.60 ms 350
Ping (ms) ICMP4 nmba : 30.32 21.70 ms 350
Ping (ms) avg : 104.90 N/A ms 350
TCP download BE1 56//1 : 39.61 38.95 Mbits/s 350
TCP download BE2 59 : 0.37 0.36 Mbits/s 350
TCP download BK1 56//2 : 36.61 35.87 Mbits/s 350
TCP download BK2 nmba : 9.65 9.21 Mbits/s 350
TCP download avg : 21.56 N/A Mbits/s 350
TCP download fairness : 0.62 N/A Mbits/s 350
TCP download sum : 86.24 N/A Mbits/s 350
TCP upload BE1 56//1 : 41.27 41.77 Mbits/s 350
TCP upload BE2 59 : 0.07 0.65 Mbits/s 350
TCP upload BK1 56//2 : 44.10 44.34 Mbits/s 350
TCP upload BK2 nmba : 9.47 9.68 Mbits/s 350
TCP upload avg : 23.73 N/A Mbits/s 350
TCP upload fairness : 0.60 N/A Mbits/s 350
TCP upload sum : 94.91 N/A Mbits/s 350
A single client netperf to server "59" from the lan client does ~80 mbps for wifi client to AP, ~100 mbps for AP to wifi client. This is an example of how "speed" kills my wifi.
nmba is the mac book air which I find problematic to use for testing. For example, running irtt as a server on nmba and connecting to it from a lan client gives different results than running irtt as a client on nmba connecting to a lan server. I'm still working through issues like this so I wouldn't pay too much attention to these results just yet. I'd avoid using the mac if I could.
FYI the above also have a patch to enable ATF on the r7500v2 enabled. I don't think this is making much difference but I'll repeat without that as soon as I can reboot the AP.