Eric,
Once again, thanks for looking into this, and sorry for being slow. Here
are the results for 4.13-rc3 kernel using BBR congestion control:
kir@kd:~/wifiperf/4.13-rc3/2$ cat results
limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10);
min 7.64 max 17.30 avg 13.92 num 40
limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 6);
min 52.20 max 95.90 avg 73.25 num 40
limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 7);
min 17.20 max 94.80 avg 57.54 num 40
limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8);
min 19.00 max 80.40 avg 65.97 num 40
limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 7);
min 53.30 max 92.50 avg 69.37 num 40
limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 8);
min 38.40 max 84.20 avg 61.54 num 40
There is not much difference in throughput (unless with default values),
maybe the reason is absolute numbers are slow (my T440s wifi is about
twice as fast), so there is something else involved.
Do you need to test for cubic cc?
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https://bugs.launchpad.net/bugs/1670041
Title:
Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
1535)
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Zesty:
In Progress
Bug description:
Update (2017-05-20):
Kalle Valo suggested a hack which increased client -> AP TCP performance - so
it does not look like a firmware issue as I thought originally, rather an
ath10k driver issue:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/11
https://patchwork.kernel.org/patch/5784701/ (the hack is at the bottom)
Tested here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/17
Update: added some forensics in the paste (a long read):
http://paste.ubuntu.com/24118478/
-----
3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
Network Adapter (rev 32)
qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:1535
Original message:
------
I experience a very poor 802.11ac performance of a QCA6174 Wireless card
(Killer Wireless 1535).
This is a dev version of Zesty with a recently released 4.10 kernel:
uname -r
4.10.0-9-generic
dpkg -l linux-firmware | grep ii
ii linux-firmware 1.163 all Firmware for Linux kernel drivers
lspci -vvv:
...
3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
Network Adapter (rev 32)
Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network
Adapter
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 334
Region 0: Memory at dd200000 (64-bit, non-prefetchable) [size=2M]
Capabilities: <access denied>
Kernel driver in use: ath10k_pci
Kernel modules: ath10k_pci
-----------------------------------------
Testing wireless speed with RT-87U 802.11ac router shows that the
speed is only 27.3 megabits per second which is very low for an
802.11ac card:
iperf -c rtr
------------------------------------------------------------
Client connecting to rtr, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.10.10.78 port 48930 connected with 10.10.10.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 32.6 MBytes 27.3 Mbits/sec
------------------------------------
For comparison, on the same network (from the same distance to the
router) I have the following result with an Intel's card (on a 4.8
kernel, different laptop):
UX32LN:~$ lspci | grep 7260
02:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
UX32LN:~$ iperf -c rtr
------------------------------------------------------------
Client connecting to rtr, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.10.10.208 port 37196 connected with 10.10.10.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.1 sec 237 MBytes 198 Mbits/sec
administrator@UX32LN:~$ lsp
lspci lspcmcia lspgpot
200 Mbps is much better.
-----------------------------------
Back to the problematic card:
Booted 16.04.2 with the rolling HWE kernel 4.8:
journalctl -k | grep -i ath
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: enabling device (0000
-> 0002)
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: pci irq msi
oper_irq_mode 2 irq_mode 0 reset_mode 0
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: Direct firmware load
for ath10k/pre-cal-pci-0000:3b:00.0.bin failed with error -2
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: Direct firmware load
for ath10k/cal-pci-0000:3b:00.0.bin failed with error -2
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: Direct firmware load
for ath10k/QCA6174/hw3.0/firmware-5.bin failed with error -2
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: could not fetch
firmware file 'ath10k/QCA6174/hw3.0/firmware-5.bin': -2
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: qca6174 hw3.2 target
0x05030000 chip_id 0x00340aff sub 1a56:1535
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: kconfig debug 0
debugfs 1 tracing 1 dfs 0 testmode 0
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: firmware ver
WLAN.RM.2.0-00180-QCARMSWPZ-1 api 4 features wowlan,ignore-otp,no-4addr-pad
crc32 75dee6c5
Mar 04 18:28:31 ubuntu kernel: ath10k_pci 0000:3b:00.0: board_file api 2
bmi_id N/A crc32 6fc88fe7
Mar 04 18:28:34 ubuntu kernel: ath10k_pci 0000:3b:00.0: htt-ver 3.26 wmi-op 4
htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
Mar 04 18:28:34 ubuntu kernel: ath: EEPROM regdomain: 0x6c
Mar 04 18:28:34 ubuntu kernel: ath: EEPROM indicates we should expect a
direct regpair map
Mar 04 18:28:34 ubuntu kernel: ath: Country alpha2 being used: 00
Mar 04 18:28:34 ubuntu kernel: ath: Regpair used: 0x6c
Mar 04 18:28:34 ubuntu kernel: ath10k_pci 0000:3b:00.0 wlp59s0: renamed from
wlan0
iperf -c 10.10.10.1
------------------------------------------------------------
Client connecting to 10.10.10.1, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.10.10.78 port 43786 connected with 10.10.10.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 43.0 MBytes 36.0 Mbits/sec
--------------------------------
Booted on 4.4 General Availability kernel - the card did not work at
all:
Mar 04 18:51:54 ubuntu kernel: ath10k_pci 0000:3b:00.0: failed to enable
dynamic BW: -11
Mar 04 18:52:00 ubuntu kernel: ath10k_pci 0000:3b:00.0: could not suspend
target (-11)
--------------------------------
The card's product name is Killer Wireless-AC 1535:
http://www.killernetworking.com/products/killer-wireless-ac-1535
The card vendor refers to linux-firmware 1.163:
http://www.killernetworking.com/driver-downloads/knowledge-base?view=topic&id=2
---------------------------------
I tend to blame Atheros firmware so I've tried whatever kvalo has in
the ath10k-firmware
https://github.com/kvalo/ath10k-firmware
sudo rmmod ath10k_pci ath10k_core ath mac80211 cfg80211
# this gets rid of some of the kernel warnings about firmware but the
performance remains low
sudo cp ath10k-
firmware/QCA6174/hw3.0/firmware-4.bin_WLAN.RM.2.0-00180-QCARMSWPZ-1
/lib/firmware/ath10k/QCA6174/hw3.0/firmware-5.bin
sudo cp ath10k-firmware/QCA6174/hw3.0/board-2.bin
/lib/firmware/ath10k/QCA6174/hw3.0/board-2.bin
sudo modprobe -a ath10k_pci ath10k_core ath mac80211 cfg80211
----------------------------------
Tried both 5.0 GHz and 2.4 GHz modes - got similar results.
----------------------------------
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-9-generic 4.10.0-9.11
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dima 3458 F.... pulseaudio
/dev/snd/controlC1: dima 3458 F.... pulseaudio
CurrentDesktop: Unity:Unity7
Date: Sat Mar 4 22:03:00 2017
InstallationDate: Installed on 2017-02-27 (5 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20170227)
MachineType: Razer Blade
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-9-generic.efi.signed
root=UUID=3f515c94-cd91-48b4-80f6-84ec24cb7b8f ro rootflags=subvol=@ quiet
button.lid_init_state=open pcie_aspm=off
RelatedPackageVersions:
linux-restricted-modules-4.10.0-9-generic N/A
linux-backports-modules-4.10.0-9-generic N/A
linux-firmware 1.163
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/10/2017
dmi.bios.vendor: Razer
dmi.bios.version: 1.00
dmi.board.name: Razer
dmi.board.vendor: Razer
dmi.chassis.type: 9
dmi.chassis.vendor: Razer
dmi.modalias:
dmi:bvnRazer:bvr1.00:bd01/10/2017:svnRazer:pnBlade:pvr6.06:rvnRazer:rnRazer:rvr:cvnRazer:ct9:cvr:
dmi.product.name: Blade
dmi.product.version: 6.06
dmi.sys.vendor: Razer
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