[FS#111] [ath9k] Commit 207338c causes WiFi performance regression(160MBit -> 45MBit)

LEDE Bugs lede-bugs at lists.infradead.org
Mon Aug 22 19:41:13 PDT 2016


The following task has a new comment added:

FS#111 - [ath9k] Commit 207338c causes WiFi performance regression(160MBit -> 45MBit)
User who did this - Zhong Jianxin (azuwis)

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Test setup:

1. Compile LEDE using this .config

    $ ./scripts/diffconfig.sh 
    CONFIG_TARGET_ar71xx=y
    CONFIG_TARGET_ar71xx_generic=y
    CONFIG_TARGET_ar71xx_generic_DEVICE_mw4530r-v1=y

2. Sysupgrade

   # sysupgrade -n lede-ar71xx-generic-mw4530r-v1-squashfs-sysupgrade.bin

3. Enable wireless, /etc/config/wireless

    config wifi-device 'radio1'
      option type 'mac80211'
      option hwmode '11a'
      option path 'pci0000:00/0000:00:00.0'
      option channel '161'
      option htmode 'HT40-'
      option noscan '1'

    config wifi-iface
      option device 'radio1'
      option network 'lan'
      option mode 'ap'
      option ssid 'Wireless'
      option encryption 'psk2'
      option key 'foobar'

4. Connect desktop PC to lan(wired, 1000Mb/s), run `iperf3 -s`; connect laptop to Wireless AP,
run `iperf3 -c desktop_ip -t 30 -R`

With the above setup, git revision 7bdc21d or 98e4b50 result in 160MBit/s, all the revisions
tagged bad above result in 45MBit/s.

Reverting 207338c also gives me 160MBit/s.

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=111#comment280



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