VHT160 connection, reported bitrate seems wrong

Please provide this info. See this link for more info on how to gather debug info: http://www.candelatech.com/ath10k-bugs.php

Description of the problem (how to configure, how to reproduce, how often it happens).

"iw dev wlan0 station dump" reports a wrong rx/tx bitrate if using a VHT160 connection on the router:

signal: -60 [-65, -66, -63, -70] dBm
signal avg: -59 [-64, -65, -62, -70] dBm
tx bitrate: 360.0 MBit/s VHT-MCS 9 40MHz VHT-NSS 2
tx duration: 2944201 us
rx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2

iw dev wlan0 info

type AP
wiphy 0
channel 36 (5180 MHz), width: 160 MHz, center1: 5250 MHz
txpower 23.00 dBm

there's also no change in these bitrates, even when there's a longer distance between client and router.

On the client i usually get this bitrates reported:

iw dev wlp3s0 link:

signal: -38 dBm
rx bitrate: 1560.0 MBit/s VHT-MCS 9 160MHz VHT-NSS 2
tx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
bss flags: short-slot-time
dtim period: 2
beacon int: 100

I've run a few iperf3 tests and i get 800 - 900 mbit/s for rx and around 500 mbit/s for tx (from the client). So i believe, there is actually a VHT160 connection active.

I've tried the regular ath10k driver and firmware. The result is different:

iw dev wlan0 station dump:

signal: -60 [-65, -69, -64, -70] dBm
signal avg: -60 [-64, -69, -64, -68] dBm
tx bitrate: 866.7 MBit/s VHT-MCS 9 160MHz short GI VHT-NSS 1
tx duration: 14605106 us
rx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
rx duration: 16294488 us
last ack signal:-45 dBm
avg ack signal: -45 dBm

It's a little bit strange, there is a VHT160 connection reported, but only single stream.... At least the reported bitrates are consistent to the Client.

Software (OS, Firmware version, kernel, driver, etc)

Wireless router: OpenWRT/Kernel 5.4.59, ath10k_ct + ct firmware

Client: Linux/Kernel 5.8.3, iwlwifi driver

Hardware (NIC chipset, platform, etc)

Netgear XR500 (similar to R7800, qca9984)

Intel ax200 as client (VHT160 capable)

Logs (dmesg, maybe supplicant and/or hostap)

dmesg|grep ath:

[ 18.013904] ath10k_pci 0000:01:00.0: assign IRQ: got 39
[ 18.013927] ath10k 5.4 driver, optimized for CT firmware, probing pci device: 0x46.
[ 18.014004] ath10k_mac_create, priv_size: 876 hw: dc8f1487 hw->priv: dac38b53
[ 18.021809] ath10k_pci 0000:01:00.0: enabling device (0140 -> 0142)
[ 18.027820] ath10k_pci 0000:01:00.0: enabling bus mastering
[ 18.028361] ath10k_pci 0000:01:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[ 18.739146] ath10k_pci 0000:01:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
[ 18.739181] ath10k_pci 0000:01:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 18.749987] ath10k_pci 0000:01:00.0: firmware ver 10.4b-ct-9984-fW-13-795874169 api 5 features mfp,peer-flow-ctrl,txstatus-noack,wmi-10.x-CT,ratemask-CT,regdump-CT,txrate-CT,flush-all-CT,pingpong-CT,ch-regs-CT,nop-CT,set-special-CT,tx-rc-CT,cust-stats-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT,wmi-bcn-rc-CT crc32 f3d4b769
[ 21.071902] ath10k_pci 0000:01:00.0: board_file api 2 bmi_id 0:1 crc32 85498734
[ 26.898568] ath10k_pci 0000:01:00.0: unsupported HTC service id: 1536
[ 26.899562] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 26.904141] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
[ 26.987386] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 26.988261] ath10k_pci 0000:01:00.0: wmi print 'free: 84920 iram: 13316 sram: 11224'
[ 27.215773] ath10k_pci 0000:01:00.0: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[ 27.365356] ath: EEPROM regdomain sanitized
[ 27.365366] ath: EEPROM regdomain: 0x64
[ 27.365373] ath: EEPROM indicates we should expect a direct regpair map
[ 27.365389] ath: Country alpha2 being used: 00
[ 27.365395] ath: Regpair used: 0x64
[ 27.379996] ath10k_pci 0001:01:00.0: assign IRQ: got 41
[ 27.380021] ath10k 5.4 driver, optimized for CT firmware, probing pci device: 0x46.
[ 27.382580] ath10k_mac_create, priv_size: 876 hw: ea86607e hw->priv: decfb32e
[ 27.390588] ath10k_pci 0001:01:00.0: enabling device (0140 -> 0142)
[ 27.397295] ath10k_pci 0001:01:00.0: enabling bus mastering
[ 27.397820] ath10k_pci 0001:01:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[ 28.021647] ath10k_pci 0001:01:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
[ 28.021694] ath10k_pci 0001:01:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 28.034557] ath10k_pci 0001:01:00.0: firmware ver 10.4b-ct-9984-fW-13-795874169 api 5 features mfp,peer-flow-ctrl,txstatus-noack,wmi-10.x-CT,ratemask-CT,regdump-CT,txrate-CT,flush-all-CT,pingpong-CT,ch-regs-CT,nop-CT,set-special-CT,tx-rc-CT,cust-stats-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT,wmi-bcn-rc-CT crc32 f3d4b769
[ 30.359987] ath10k_pci 0001:01:00.0: board_file api 2 bmi_id 0:2 crc32 85498734
[ 36.200770] ath10k_pci 0001:01:00.0: unsupported HTC service id: 1536
[ 36.202058] ath10k_pci 0001:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 36.206190] ath10k_pci 0001:01:00.0: msdu-desc: 2500 skid: 32
[ 36.289683] ath10k_pci 0001:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 36.290546] ath10k_pci 0001:01:00.0: wmi print 'free: 84920 iram: 13316 sram: 11224'
[ 36.597013] ath10k_pci 0001:01:00.0: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[ 36.690120] ath: EEPROM regdomain sanitized
[ 36.690139] ath: EEPROM regdomain: 0x64
[ 36.690150] ath: EEPROM indicates we should expect a direct regpair map
[ 36.690175] ath: Country alpha2 being used: 00
[ 36.690184] ath: Regpair used: 0x64
[ 45.505070] ath: EEPROM regdomain: 0x8114
[ 45.505089] ath: EEPROM indicates we should expect a country code
[ 45.508090] ath: doing EEPROM country->regdmn map search
[ 45.514228] ath: country maps to regdmn code: 0x37
[ 45.519628] ath: Country alpha2 being used: DE
[ 45.524128] ath: Regpair used: 0x37
[ 45.528538] ath: regdomain 0x8114 dynamically updated by user
[ 45.532047] ath: EEPROM regdomain: 0x8114
[ 45.537851] ath: EEPROM indicates we should expect a country code
[ 45.541920] ath: doing EEPROM country->regdmn map search
[ 45.547929] ath: country maps to regdmn code: 0x37
[ 45.553353] ath: Country alpha2 being used: DE
[ 45.557916] ath: Regpair used: 0x37
[ 45.562422] ath: regdomain 0x8114 dynamically updated by user
[ 53.139027] ath10k_pci 0001:01:00.0: unsupported HTC service id: 1536
[ 53.139320] ath10k_pci 0001:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 53.144444] ath10k_pci 0001:01:00.0: msdu-desc: 2500 skid: 32
[ 53.228026] ath10k_pci 0001:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 53.228856] ath10k_pci 0001:01:00.0: wmi print 'free: 84920 iram: 13316 sram: 11224'
[ 53.707268] ath10k_pci 0001:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
[ 53.918217] ath10k_pci 0001:01:00.0: NOTE: Firmware DBGLOG output disabled in debug_mask: 0x10000000
[ 59.785253] ath10k_pci 0000:01:00.0: unsupported HTC service id: 1536
[ 59.785291] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 59.790772] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
[ 59.873966] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 59.874792] ath10k_pci 0000:01:00.0: wmi print 'free: 84920 iram: 13316 sram: 11224'
[ 60.259387] ath10k_pci 0000:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
[ 146.410001] ath10k_pci 0000:01:00.0: mac flush null vif, drop 0 queues 0xffff
[ 168.968233] ath10k_pci 0000:01:00.0: NIC rx-max-rate: 0 calculated-max: 0 rxnss_override: 0x80000000 nss160: 1 spatial-stre

logread|grep hostapd:

Mon Aug 24 16:11:48 2020 daemon.notice hostapd: Configuration file: /var/run/hostapd-phy0.conf (phy wlan0) --> new PHY
Mon Aug 24 16:11:55 2020 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
Mon Aug 24 16:11:55 2020 daemon.notice hostapd: ACS: Automatic channel selection started, this may take a bit
Mon Aug 24 16:11:55 2020 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->ACS
Mon Aug 24 16:11:55 2020 daemon.notice hostapd: wlan0: ACS-STARTED
Mon Aug 24 16:12:15 2020 daemon.notice hostapd: wlan0: ACS-COMPLETED freq=5180 channel=36
Mon Aug 24 16:12:15 2020 daemon.notice hostapd: wlan0: interface state ACS->HT_SCAN
Mon Aug 24 16:12:16 2020 daemon.notice hostapd: wlan0: interface state HT_SCAN->DFS
Mon Aug 24 16:12:16 2020 daemon.notice hostapd: wlan0: DFS-CAC-START freq=5180 chan=36 sec_chan=1, width=2, seg0=50, seg1=0, cac_time=60s
Tue Aug 25 22:21:25 2020 daemon.notice hostapd: wlan0: DFS-CAC-COMPLETED success=1 freq=5180 ht_enabled=0 chan_offset=0 chan_width=5 cf1=5250 cf2=0
Tue Aug 25 22:21:25 2020 daemon.warn hostapd: Can't set DFS state for freq 5180 MHz
Tue Aug 25 22:21:25 2020 daemon.warn hostapd: Can't set DFS state for freq 5200 MHz
Tue Aug 25 22:21:25 2020 daemon.warn hostapd: Can't set DFS state for freq 5220 MHz
Tue Aug 25 22:21:25 2020 daemon.warn hostapd: Can't set DFS state for freq 5240 MHz
Tue Aug 25 22:21:26 2020 daemon.notice hostapd: wlan0: interface state DFS->ENABLED
Tue Aug 25 22:21:26 2020 daemon.notice hostapd: wlan0: AP-ENABLED

greearb / ath10k-ct

VHT160 connection, reported bitrate seems wrong #150