On Tue, Mar 27, 2018 at 09:46:36AM +0200, Mathias Kresin wrote:

quoted

Could you test just RX AMPDU patches, i.e.

rt2800_change_rx_ampdu_factor.patch
rt2800_change_rx_ampdu_density.patch

I have somewhat positive results on RX performance on some devices
with those. Perhaps you could confirm that :-)

This time I've done the test with HT20 only, to not annoy my neighbours.

The test setup is the following:

ath9k (STA) <=> (AP) o2 Box 6431 (RJ45) <=> desktop

With the patches applied the bandwidth is somewhat around 10 MBit/sec lower.
Even if I was able to reliable reproduce it, I'm not sure if it is within
the measuring tolerance.

Ok. I think when BBP/RF is correctly programmed patches will downgrade
performance. For not well optimized devices patches might
improve things , but this is not preferred solution. For 30+ client
scenario I suggest to just disable HT (11n) in OpenWRT config.

Additionally since those errors do not happen frequently perhaps there
is possibility to create watchdog and reset the device when problems
start to happen.

FWIW: I'm running wt3020 (mt7620 device) as my home router for 3 weeks now
and do not see any errors (I have 4 client devices). Performance measured
by iperf is not good though - about 40 Mbit/s .

Regards
Stanislaw