[ath9k-devel] ath9k bad performances

[Nenad Opsenica <nenad@panline.net>]

Matteo,

Try to turn off power savings feature on STA:

iwconfig wlan0 power off

What performance could you get after that?

Regards,

    Nenad

Matteo Croce wrote:
> Hi.
>
> i'm playing with ath9k and I get very poor performances. I noticed
> that I can send data fast to the AP but the AP is very slow to send,
> both devices are running openwrt trunk with latest ath9k from linville's tree.
> The card are Ubiquiti SR71-A MIMO 3x3 with and AR9160 chipset in it.
> The devices are close enough (not too much) and noone else is
> transmitting on the 5 GHz band
> here are some informations that could help:
>
> # client -> AP
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  0.0- 1.0 sec  7.58 MBytes  63.6 Mbits/sec  0.171 ms  490/ 5896 (8.3%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  1.0- 2.0 sec  7.78 MBytes  65.3 Mbits/sec  0.240 ms  379/ 5932 (6.4%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  2.0- 3.0 sec  7.71 MBytes  64.7 Mbits/sec  0.158 ms  436/ 5937 (7.3%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  3.0- 4.0 sec  7.48 MBytes  62.8 Mbits/sec  0.432 ms  593/ 5931 (10%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  4.0- 5.0 sec  7.39 MBytes  62.0 Mbits/sec  0.194 ms  258/ 5526 (4.7%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  5.0- 6.0 sec  7.08 MBytes  59.4 Mbits/sec  0.214 ms  605/ 5658 (11%)
>
> # AP -> client
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  0.0- 1.0 sec    574 KBytes  4.70 Mbits/sec  8.346 ms  108/  508 (21%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  1.0- 2.0 sec    546 KBytes  4.47 Mbits/sec  0.877 ms   54/  434 (12%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  2.0- 3.0 sec    894 KBytes  7.33 Mbits/sec  6.866 ms   48/  671 (7.2%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  3.0- 4.0 sec    309 KBytes  2.53 Mbits/sec  1.564 ms   61/  276 (22%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  4.0- 5.0 sec    702 KBytes  5.75 Mbits/sec  3.300 ms   27/  516 (5.2%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  5.0- 6.0 sec    314 KBytes  2.58 Mbits/sec  8.627 ms   59/  278 (21%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  6.0- 7.0 sec    296 KBytes  2.42 Mbits/sec  18.781 ms   25/  231 (11%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  7.0- 8.0 sec    993 KBytes  8.14 Mbits/sec  2.878 ms   80/  772 (10%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  8.0- 9.0 sec    706 KBytes  5.79 Mbits/sec  6.422 ms   58/  550 (11%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  9.0-10.0 sec    334 KBytes  2.74 Mbits/sec  4.557 ms   42/  275 (15%)
> [ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
> [  3]  0.0-10.9 sec  5.57 MBytes  4.30 Mbits/sec  91.782 ms  568/ 4543 (13%)
>
> # ping 10.0.0.1 # client -> AP
> PING 10.0.0.1 (10.0.0.1): 56 data bytes
> 64 bytes from 10.0.0.1: seq=0 ttl=64 time=2.762 ms
> 64 bytes from 10.0.0.1: seq=1 ttl=64 time=3.866 ms
> 64 bytes from 10.0.0.1: seq=2 ttl=64 time=2.613 ms
> 64 bytes from 10.0.0.1: seq=3 ttl=64 time=2.777 ms
> ^C
> --- 10.0.0.1 ping statistics ---
> 4 packets transmitted, 4 packets received, 0% packet loss
> round-trip min/avg/max = 2.613/3.004/3.866 ms
> # ping 10.0.0.2 # AP -> client
> PING 10.0.0.2 (10.0.0.2): 56 data bytes
> 64 bytes from 10.0.0.2: seq=0 ttl=64 time=146.080 ms
> 64 bytes from 10.0.0.2: seq=1 ttl=64 time=55.668 ms
> 64 bytes from 10.0.0.2: seq=2 ttl=64 time=78.811 ms
> 64 bytes from 10.0.0.2: seq=3 ttl=64 time=102.908 ms
> 64 bytes from 10.0.0.2: seq=4 ttl=64 time=25.216 ms
> ^C
> --- 10.0.0.2 ping statistics ---
> 5 packets transmitted, 5 packets received, 0% packet loss
> round-trip min/avg/max = 25.216/81.736/146.080 ms
>
> # while sleep 1 ; do iw dev wlan0 link; done
> Connected to 00:15:6d:84:13:06 (on wlan0)
> 	SSID: OpenWrt
> 	freq: 5180
> 	RX: 279472 bytes (1931 packets)
> 	TX: 822486078 bytes (536976 packets)
> 	signal: -18 dBm
> 	tx bitrate: 324.0 MBit/s MCS 28 40Mhz
> Connected to 00:15:6d:84:13:06 (on wlan0)
> 	SSID: OpenWrt
> 	freq: 5180
> 	RX: 211507 bytes (1450 packets)
> 	TX: 423926440 bytes (276793 packets)
> 	signal: -18 dBm
> 	tx bitrate:  MCS 36 40Mhz
> Connected to 00:15:6d:84:13:06 (on wlan0)
> 	SSID: OpenWrt
> 	freq: 5180
> 	RX: 275354 bytes (1902 packets)
> 	TX: 797028834 bytes (520359 packets)
> 	signal: -18 dBm
> 	tx bitrate: 324.0 MBit/s MCS 28 40Mhz
> Connected to 00:15:6d:84:13:06 (on wlan0)
> 	SSID: OpenWrt
> 	freq: 5180
> 	RX: 276632 bytes (1911 packets)
> 	TX: 806084486 bytes (526270 packets)
> 	signal: -18 dBm
> 	tx bitrate: 324.0 MBit/s MCS 28 40Mhz
>
>
> # cat /etc/hostapd.conf
> driver=nl80211
> interface=wlan0
> hw_mode=a
>
>
> ssid=OpenWrt
> wpa=0
>
> country_code=US
> channel=36
> ieee80211n=1
> ht_capab=[SHORT-GI-40][HT40+]
>
>
>
> wme_enabled=1
> wme_ac_bk_cwmin=4
> wme_ac_bk_cwmax=10
> wme_ac_bk_aifs=7
> wme_ac_bk_txop_limit=0
> wme_ac_bk_acm=0
> wme_ac_be_aifs=3
> wme_ac_be_cwmin=4
> wme_ac_be_cwmax=10
> wme_ac_be_txop_limit=0
> wme_ac_be_acm=0
> wme_ac_vi_aifs=2
> wme_ac_vi_cwmin=3
> wme_ac_vi_cwmax=4
> wme_ac_vi_txop_limit=94
> wme_ac_vi_acm=0
> wme_ac_vo_aifs=2
> wme_ac_vo_cwmin=2
> wme_ac_vo_cwmax=3
> wme_ac_vo_txop_limit=47
> wme_ac_vo_acm=0
> tx_queue_data3_aifs=7
> tx_queue_data3_cwmin=15
> tx_queue_data3_cwmax=1023
> tx_queue_data3_burst=0
> tx_queue_data2_aifs=3
> tx_queue_data2_cwmin=15
> tx_queue_data2_cwmax=63
> tx_queue_data2_burst=0
> tx_queue_data1_aifs=1
> tx_queue_data1_cwmin=7
> tx_queue_data1_cwmax=15
> tx_queue_data1_burst=3.0
> tx_queue_data0_aifs=1
> tx_queue_data0_cwmin=3
> tx_queue_data0_cwmax=7
> tx_queue_data0_burst=1.5
>
> # dmesg
> cfg80211: Calling CRDA to update world regulatory domain
> cfg80211: World regulatory domain updated:
> 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
> 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> 	(2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> 	(2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> 	(5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> PCI: Enabling device 0000:00:11.0 (0000 -> 0002)
> phy0: Selected rate control algorithm 'ath9k_rate_control'
> Registered led device: ath9k-phy0::radio
> Registered led device: ath9k-phy0::assoc
> Registered led device: ath9k-phy0::tx
> Registered led device: ath9k-phy0::rx
> phy0: Atheros AR9160 MAC/BB Rev:0 AR5133 RF Rev:b0 mem=0xb0000000, irq=48
> # hostapd -v
> hostapd v0.6.9
> User space daemon for IEEE 802.11 AP management,
> IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
> Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> and contributors
>
>
>
> Cheers,
> Matteo Croce
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