Very low throughput with QCA9880
Ben Greear
greearb at candelatech.com
Thu Jan 26 11:38:11 PST 2017
If UDP works noticeably better, then you probably need to use a different
TCP congestion control.
Thanks,
Ben
On 01/26/2017 11:34 AM, Martin Potts wrote:
> Hi all,
>
> I'm using a QC9880 802.11ac NIC with Ubuntu 14.04 LTS and getting
> really low upstream (STA to AP) throughput. The specific NIC is the
> Compex WLE900VX.
>
> Testing using iperf3 in TCP mode I cannot achieve much more than 15
> Mbps. Downstream throughput is roughly 145 Mbps. I get nearly the same
> performance when testing with different AP's. Using other 802.11ac
> client devices (iPads etc) can achieve 200+ Mbps upstream to the same
> test setup.
>
> At the moment I am testing open air but will move to a cabled setup
> shortly to try and rule out RF interference issues.
>
> The ath10k driver version and firmware appear to be pretty recent.
> Here is some version info from my system.
>
> modinfo ath10k_core
> filename:
> /lib/modules/4.4.0-59-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_core.ko
> license: Dual BSD/GPL
> description: Core module for QCA988X PCIe devices.
> author: Qualcomm Atheros
> srcversion: F5C0E3964FCD86D0F5FE986
> depends: mac80211,cfg80211,ath
> intree: Y
> vermagic: 4.4.0-59-generic SMP mod_unload modversions
> parm: debug_mask:Debugging mask (uint)
> parm: uart_print:Uart target debugging (bool)
> parm: skip_otp:Skip otp failure for calibration in testmode (bool)
> parm: cryptmode:Crypto mode: 0-hardware, 1-software (uint)
> parm: rawmode:Use raw 802.11 frame datapath (bool)
>
> modinfo ath10k_pci
> filename:
> /lib/modules/4.4.0-59-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko
> firmware: ath10k/QCA9377/hw1.0/board.bin
> firmware: ath10k/QCA9377/hw1.0/firmware-5.bin
> firmware: ath10k/QCA6174/hw3.0/board-2.bin
> firmware: ath10k/QCA6174/hw3.0/board.bin
> firmware: ath10k/QCA6174/hw3.0/firmware-5.bin
> firmware: ath10k/QCA6174/hw3.0/firmware-4.bin
> firmware: ath10k/QCA6174/hw2.1/board-2.bin
> firmware: ath10k/QCA6174/hw2.1/board.bin
> firmware: ath10k/QCA6174/hw2.1/firmware-5.bin
> firmware: ath10k/QCA6174/hw2.1/firmware-4.bin
> firmware: ath10k/QCA988X/hw2.0/board-2.bin
> firmware: ath10k/QCA988X/hw2.0/board.bin
> firmware: ath10k/QCA988X/hw2.0/firmware-5.bin
> firmware: ath10k/QCA988X/hw2.0/firmware-4.bin
> firmware: ath10k/QCA988X/hw2.0/firmware-3.bin
> firmware: ath10k/QCA988X/hw2.0/firmware-2.bin
> firmware: ath10k/QCA988X/hw2.0/firmware.bin
> license: Dual BSD/GPL
> description: Driver support for Atheros QCA988X PCIe devices
> author: Qualcomm Atheros
> srcversion: 8CBDAC7980FC042032AE6A6
> alias: pci:v0000168Cd00000042sv*sd*bc*sc*i*
> alias: pci:v0000168Cd00000040sv*sd*bc*sc*i*
> alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i*
> alias: pci:v0000168Cd00000041sv*sd*bc*sc*i*
> alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i*
> depends: ath10k_core
> intree: Y
> vermagic: 4.4.0-59-generic SMP mod_unload modversions
> parm: irq_mode:0: auto, 1: legacy, 2: msi (default: 0) (uint)
> parm: reset_mode:0: auto, 1: warm only (default: 0) (uint)
>
> ethtool -i wlan2
> driver: ath10k_pci
> version: 4.4.0-59-generic
> firmware-version: 10.2.4.70.9-2
> bus-info: 0000:04:00.0
> supports-statistics: yes
> supports-test: no
> supports-eeprom-access: no
> supports-register-dump: no
> supports-priv-flags: no
>
> iw list
> Wiphy phy0
> Band 1:
> Capabilities: 0x19e3
> RX LDPC
> HT20/HT40
> Static SM Power Save
> RX HT20 SGI
> RX HT40 SGI
> TX STBC
> RX STBC 1-stream
> Max AMSDU length: 7935 bytes
> DSSS/CCK HT40
> Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> Minimum RX AMPDU time spacing: 8 usec (0x06)
> HT TX/RX MCS rate indexes supported: 0-23
> Frequencies:
> * 2412 MHz [1] (27.0 dBm)
> * 2417 MHz [2] (27.0 dBm)
> * 2422 MHz [3] (27.0 dBm)
> * 2427 MHz [4] (27.0 dBm)
> * 2432 MHz [5] (27.0 dBm)
> * 2437 MHz [6] (27.0 dBm)
> * 2442 MHz [7] (27.0 dBm)
> * 2447 MHz [8] (27.0 dBm)
> * 2452 MHz [9] (27.0 dBm)
> * 2457 MHz [10] (27.0 dBm)
> * 2462 MHz [11] (27.0 dBm)
> * 2472 MHz [13] (disabled)
> * 2484 MHz [14] (disabled)
> Bitrates (non-HT):
> * 1.0 Mbps
> * 2.0 Mbps (short preamble supported)
> * 5.5 Mbps (short preamble supported)
> * 11.0 Mbps (short preamble supported)
> * 6.0 Mbps
> * 9.0 Mbps
> * 12.0 Mbps
> * 18.0 Mbps
> * 24.0 Mbps
> * 36.0 Mbps
> * 48.0 Mbps
> * 54.0 Mbps
> Band 2:
> Capabilities: 0x19e3
> RX LDPC
> HT20/HT40
> Static SM Power Save
> RX HT20 SGI
> RX HT40 SGI
> TX STBC
> RX STBC 1-stream
> Max AMSDU length: 7935 bytes
> DSSS/CCK HT40
> Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> Minimum RX AMPDU time spacing: 8 usec (0x06)
> HT TX/RX MCS rate indexes supported: 0-23
> Frequencies:
> * 5180 MHz [36] (17.0 dBm)
> * 5200 MHz [40] (17.0 dBm)
> * 5220 MHz [44] (17.0 dBm)
> * 5240 MHz [48] (17.0 dBm)
> * 5260 MHz [52] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5280 MHz [56] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5300 MHz [60] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5320 MHz [64] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5500 MHz [100] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5520 MHz [104] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5540 MHz [108] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5560 MHz [112] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5580 MHz [116] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5600 MHz [120] (disabled)
> * 5620 MHz [124] (disabled)
> * 5640 MHz [128] (disabled)
> * 5660 MHz [132] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5680 MHz [136] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5700 MHz [140] (20.0 dBm) (passive scanning,
> no IBSS, radar detection)
> * 5745 MHz [149] (30.0 dBm)
> * 5765 MHz [153] (30.0 dBm)
> * 5785 MHz [157] (30.0 dBm)
> * 5805 MHz [161] (30.0 dBm)
> * 5825 MHz [165] (30.0 dBm)
> Bitrates (non-HT):
> * 6.0 Mbps
> * 9.0 Mbps
> * 12.0 Mbps
> * 18.0 Mbps
> * 24.0 Mbps
> * 36.0 Mbps
> * 48.0 Mbps
> * 54.0 Mbps
> max # scan SSIDs: 16
> max scan IEs length: 195 bytes
> Coverage class: 0 (up to 0m)
> Supported Ciphers:
> * WEP40 (00-0f-ac:1)
> * WEP104 (00-0f-ac:5)
> * TKIP (00-0f-ac:2)
> * CCMP (00-0f-ac:4)
> * CMAC (00-0f-ac:6)
> Available Antennas: TX 0x7 RX 0x7
> Configured Antennas: TX 0x7 RX 0x7
> Supported interface modes:
> * managed
> * AP
> * AP/VLAN
> * monitor
> * mesh point
> software interface modes (can always be added):
> * AP/VLAN
> * monitor
> valid interface combinations:
> * #{ AP, mesh point } <= 8,
> total <= 8, #channels <= 1, STA/AP BI must match
> Supported commands:
> * new_interface
> * set_interface
> * new_key
> * new_beacon
> * new_station
> * new_mpath
> * set_mesh_params
> * set_bss
> * authenticate
> * associate
> * deauthenticate
> * disassociate
> * join_ibss
> * join_mesh
> * remain_on_channel
> * set_tx_bitrate_mask
> * action
> * frame_wait_cancel
> * set_wiphy_netns
> * set_channel
> * set_wds_peer
> * Unknown command (84)
> * Unknown command (87)
> * Unknown command (85)
> * Unknown command (89)
> * Unknown command (92)
> * connect
> * disconnect
> Supported TX frame types:
> * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * Unknown mode (10): 0x00 0x10 0x20 0x30 0x40 0x50
> 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> Supported RX frame types:
> * IBSS: 0x40 0xb0 0xc0 0xd0
> * managed: 0x40 0xd0
> * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> * mesh point: 0xb0 0xc0 0xd0
> * P2P-client: 0x40 0xd0
> * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> * Unknown mode (10): 0x40 0xd0
> Device supports RSN-IBSS.
> Device supports AP-side u-APSD.
> HT Capability overrides:
> * MCS: ff ff ff ff ff ff ff ff ff ff
> * maximum A-MSDU length
> * supported channel width
> * short GI for 40 MHz
> * max A-MPDU length exponent
> * min MPDU start spacing
> Device supports TX status socket option.
> Device supports HT-IBSS.
>
> Any thoughts on why my throughput numbers are so low or suggestions
> would be greatly appreciated.
>
> Regards,
> Martin
>
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--
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc http://www.candelatech.com
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