Thread (21 messages) 21 messages, 5 authors, 2018-03-28

Re: ieee80211 phy0: rt2x00queue_write_tx_frame: Error - Dropping frame due to full tx queue...?

From: Stanislaw Gruszka <hidden>
Date: 2018-03-26 10:35:56

Hi Mathias 
sorry for the delayed testing. I had to create a new test setup
first, fought with buggy hardware and was busy with other stuff.
Thanks for doing it.
The two attached patches are causing a performance regression for me again:

OpenWrt head (forced HT40, 100Mbit wired interface)

wireless (iperf client) to wired (iperf server)
  Interval           Transfer     Bitrate         Retr
    0.00-60.00  sec   584 MBytes  81.6 Mbits/sec  666           sender
    0.00-60.00  sec   584 MBytes  81.6 Mbits/sec                receiver

wired (iperf client) to wireless (iperf server)
  Interval           Transfer     Bitrate         Retr
    0.00-60.00  sec   620 MBytes  86.7 Mbits/sec   33           sender
    0.00-60.00  sec   617 MBytes  86.2 Mbits/sec                receiver



OpenWrt head (forced HT40, 100Mbit wired interface)
  + rt2800_change_rx_ampdu_factor.patch
  + rt2800_change_ba_size.patch

wireless (iperf client) to wired (iperf server)
  Interval           Transfer     Bitrate         Retr
    0.00-60.00  sec   356 MBytes  49.8 Mbits/sec    6           sender
    0.00-60.00  sec   356 MBytes  49.7 Mbits/sec                receiver

wired (iperf client) to wireless (iperf server)
  Interval           Transfer     Bitrate         Retr
    0.00-60.00  sec   627 MBytes  87.7 Mbits/sec    5           sender
    0.00-60.00  sec   626 MBytes  87.5 Mbits/sec                receiver


Due to the regression I haven't tested your ampdu_density patch so
far. Let me hear if you want to see more tests done.
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 :-)

Regards
Stanislaw
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