[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Borodin Nikolay]

I have this bug too.

wlp1s0IEEE 802.11
  Mode:Managed  Frequency:2.412 GHz  Access Point: 54:89:98:2C:B6:05   
  Bit Rate=1 Mb/s   Tx-Power=20 dBm   
  Retry short limit:7   RTS thr:off   Fragment thr:off
  Power Management:off
  Link Quality=49/70  Signal level=-61 dBm  
  Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
  Tx excessive retries:0  Invalid misc:19   Missed beacon:0

┌(monsterovich@dell)─(pts/0)─(~)
└─(>) wget https://speed.hetzner.de/10GB.bin
--2021-11-29 02:04:47--  https://speed.hetzner.de/10GB.bin
Распознаётся speed.hetzner.de (speed.hetzner.de)... 88.198.248.254, 
2a01:4f8:0:59ed::2
Подключение к speed.hetzner.de (speed.hetzner.de)|88.198.248.254|:443... 
соединение установлено.
HTTP-запрос отправлен. Ожидание ответа... 200 OK
Длина: 1048576 (9,8G) [application/octet-stream]
Сохранение в каталог: ««10GB.bin»».

10GB.bin  0%[]  53,12M   588KB/sост
7h 21m

The speed is incredibly low compared to external Wi-Fi adapter.

wlx000db0045477  IEEE 802.11
  Mode:Managed  Frequency:2.412 GHz  Access Point: 54:89:98:2C:B6:05   
  Bit Rate=65 Mb/s   Tx-Power=20 dBm   
  Retry short  long limit:2   RTS thr:off   Fragment thr:off
  Power Management:off
  Link Quality=70/70  Signal level=-31 dBm  
  Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
  Tx excessive retries:462  Invalid misc:23   Missed beacon:0

┌(monsterovich@dell)─(pts/0)─(~)
└─(>) wget https://speed.hetzner.de/10GB.bin
--2021-11-29 02:10:01--  https://speed.hetzner.de/10GB.bin
Распознаётся speed.hetzner.de (speed.hetzner.de)... 88.198.248.254, 
2a01:4f8:0:59ed::2
Подключение к speed.hetzner.de (speed.hetzner.de)|88.198.248.254|:443... 
соединение установлено.
HTTP-запрос отправлен. Ожидание ответа... 200 OK
Длина: 1048576 (9,8G) [application/octet-stream]
Сохранение в каталог: ««10GB.bin.2»».

10GB.bin.20%[]  23,77M  2,69MB/sост
65m 19s

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions


-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Luiz Gabriel]

I also can confirm this bug is still present in Ubuntu 20.04, speed cap
at 1 Mb/s

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Nayef]

Can confirm that this bug still exists in groovy.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Andrés Fuentes]

I also confirm this bug on Focal.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Thomas Karl Pietrowski]

Can confirm. Still present here on Ubuntu Focal, too.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Karl Schindler]

this bug is still not solved in 20.04

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Tomislav]

Is there anything a Ubuntu 18.04 user (upgraded from the preinstalled
Dell XPS Ubuntu 16.04) can do without manually replacing kernels and
possibly compromising laptop bootability?

This is what I'm currently running:

$ uname -a
Linux dell-desktop 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:09:48 UTC 
2020 x86_64 x86_64 x86_64 GNU/Linux

This is what iwconfig claims:

$ iwconfig 
lono wireless extensions.

wlp2s0IEEE 802.11  ESSID:"AndroidAPCC99"  
  Mode:Managed  Frequency:2.422 GHz  Access Point: 66:89:F1:8F:8C:99   
  Bit Rate=1 Mb/s   Tx-Power=20 dBm   
  Retry short limit:7   RTS thr:off   Fragment thr:off
  Power Management:off
  Link Quality=70/70  Signal level=-24 dBm  
  Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
  Tx excessive retries:0  Invalid misc:51   Missed beacon:0

In practice, I get up to 20 Mb/s UL/DL when communicating with an FTP
server on my phone (both my laptop and the phone support 802.11ac).
Another laptop easily reaches 50 Mb/s in the same scenario.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Brad Figg]

** Tags added: cscc

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury via ubuntu-bugs]

** Changed in: linux (Ubuntu Bionic)
   Status: In Progress => Confirmed

** Changed in: linux (Ubuntu)
   Status: In Progress => Confirmed

** Changed in: linux (Ubuntu Bionic)
 Assignee: Joseph Salisbury (jsalisbury) => (unassigned)

** Changed in: linux (Ubuntu Artful)
 Assignee: Joseph Salisbury (jsalisbury) => (unassigned)

** Changed in: linux (Ubuntu)
 Assignee: Joseph Salisbury (jsalisbury) => (unassigned)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Cherrot]

I believe this issue has been fixed in newer kernel.

I have a TP-LINK TL-WDN4800 (168c:0030)，the download speed of it looks
normal, but the upload speed has never been higher than 30Mbps on my
ArchLinux with linux kernel 4.14 LTS. Then I switched to kernel 4.17,
and iperf3 shows a 124 Mbits/sec upload bitrate.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Jeff Veit]

Joseph,

Yes, your kernel does resolve this bug. Measuring using speedtest.net,
before your kernel, using the current Bionic kernel, I get 8.64mbps on a
2.4Ghz network, with a max of around 10Mbs. Four minutes later, with
your kernel, 34.92Mbs with a max of around 50Mbs.

What is perhaps not so good, is that the performance of a 5Ghz network
has dropped dramatically from around 90 - 100 Mbs, down to 9.12 to
9.43mbps. Tested repeatedly over a few minutes to make sure it's not
just a one-off.

I'll install the stock kernel again, and check it's the patch, and not
some external factor.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Jeff Veit]

Yes, confirmed. It's the patch: 109.12Mbs on 5GHz with the stock kernel.

I guess the patch needs to take note of possible throughput too.

I've only looked at download speed in all these tests.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

I built a Bionic test kernel with commits 36148c2bbfbe and c9f1f58dc2eb.
Commit 3a9b76fd0db9 is not needed in Bionic, since it is 3.15 based.

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1670041/bionic

Can you test this kernel and see if it resolves this bug?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

** Also affects: linux (Ubuntu Bionic)
   Importance: Medium
 Assignee: Joseph Salisbury (jsalisbury)
   Status: In Progress

** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
   Status: New

** No longer affects: linux (Ubuntu Zesty)

** Changed in: linux (Ubuntu Artful)
   Status: New => In Progress

** Changed in: linux (Ubuntu Artful)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Artful)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

And original commit adding the infrastructure linked to this thread ;)

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-
next.git/commit/?id=3a9b76fd0db9f0d426533f96a68a62a58753a51e

Then the official helper was added in

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-
next.git/commit/?id=c9f1f58dc2eba550f208809d272bf0b14f41edba

Thanks everybody

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kalle Valo]

The low throughput with transmit TCP streams on ath10k should be fixed
with this mac80211 commit:

mac80211: Adjust TSQ pacing shift

https://git.kernel.org/linus/36148c2bbfbe50c50206b6f61d072203c80161e0

Apparently v4.16-rc5 was the first release to have that commit.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Richard Veale]

I encountered this issue while trying to stream from a Tobii Pro Glasses
2, i.e. ~5Mbit/sec streaming, UDP or TCP recv would freeze for 3-10
seconds once every 30 to 100 seconds. Sometimes recv would block for
over 5 seconds before returning with a packet send by the host. I used a
python script to compare received datarate between windows and all the
linux boxes. The host is streaming ~5Mbit h264 stream, and my client is
simply receiving and then discarding the packets. Windows box never
reported datarate average per second beneath 600kbyte/sec, but linux
would drop to 250kbyte/sec once every 30 to 100 seconds (and then jump
up to 2000kbyte/sec to compensate). So it seems like it sleeping or
something. Note this is UDP connection, although I also tried TCP.

I'm on a Razer Blade Stealth 2016 (Killer 1535, I.e. QCA 6174 chip). I
also tried on Razer Balde 14 inch 2017 (same chip), and razer blade
stealth 2015. To some extent, a Razer blade 14 inch 2015 (QCA 4000?
chip?) also had the same issue.

I installed the newest firmware (as of 2 Feb), which did not solve the
problem. I disabled the chip's powersaving in network manager (as
suggested in #54 above by André Brait Carneiro Fabotti (andrebrait)),
and this seems to have solved the issue for the most part.

I also updated to kernel 4.15 (I'm on ubuntu 17.10), which seems to have
further smoothed the issue. Will report further if I encounter the
problem again.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

So, going back to question in #60, the Dell link just says to get the
latest stuff from kvalo's firmware repo.

If you are on 17.10 like myself then you already have it and it doesn't
help with the original problem:

➜  ~ apt policy linux-firmware 
linux-firmware:
  Installed: 1.169
  Candidate: 1.169
  Version table:
 *** 1.169 500
500 http://archive.ubuntu.com/ubuntu artful/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu artful/main i386 Packages
500 http://ru.archive.ubuntu.com/ubuntu artful/main amd64 Packages
500 http://ru.archive.ubuntu.com/ubuntu artful/main i386 Packages
100 /var/lib/dpkg/status


➜  ~ sha256sum /lib/firmware/ath10k/QCA6174/hw3.0/firmware-4.bin 
dc74ba148cf88f1f99a62854112ec574d8c265d88417a4d969461448b0ab60c5  
/lib/firmware/ath10k/QCA6174/hw3.0/firmware-4.bin


➜  hw3.0 sha256sum 
~/src/ath10k-firmware/QCA6174/hw3.0/firmware-4.bin_WLAN.RM.2.0-00180-QCARMSWPZ-1
 
dc74ba148cf88f1f99a62854112ec574d8c265d88417a4d969461448b0ab60c5  
/home/username/src/ath10k-firmware/QCA6174/hw3.0/firmware-4.bin_WLAN.RM.2.0-00180-QCARMSWPZ-1


[ ID] Interval   Transfer Bandwidth   Retr
[  5]   0.00-10.04  sec  29.2 MBytes  24.4 Mbits/sec0 sender
[  5]   0.00-10.04  sec  29.2 MBytes  24.4 Mbits/sec  receiver

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

There's also Intel 9260 coming up (wave 2):

https://wikidevi.com/wiki/Intel_Dual_Band_Wireless-AC_9260_(9260NGW)

Judging by this https://communities.intel.com/message/506847#506847 it's
only available for OEMs as of now so maybe those will go into
circulation soon for regular folks.

Meanwhile, I'll try the latest firmware from kvalo.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kir Kolyshkin]

FWIW, I replaced the Atheros card with Intel 8265, which I bought for
$20 on amazon (https://www.amazon.com/gp/product/B0721MLM8B) and haven't
had any problems since. iperf results are way more stable than with
Atheros. I suggest everyone to do the same thing.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kai-Heng Feng]

The disconnecting problem is not the same as this issue.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Egon Holtz]

Hello s.illes79;

I tried to install the recommendations from Dell, I think it works for
me...

uname -r
4.4.0-96-generic

 dpkg -l linux-firmware | grep ii
ii  linux-firmware 1.157.13 all  Firmware for Linux kernel drivers

lspci -vvv
02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network 
Adapter (rev 32)
Subsystem: Dell 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- SERR- 
Kernel driver in use: ath10k_pci
Kernel modules: ath10k_pci

My connection was dropping every time but now looks better...

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Jean Deruelle]

Using this guide
https://www.dell.com/support/article/ng/en/ngdhs1/sln306440/killer-n1535
-wireless-firmware-manual-update-guide-for-ubuntu-systems?lang=en and
upgrading to latest firmware for Dell XPS 15 on Ubuntu 17.10 for the
following below solved my wifi frequent connection drop while
NetworkManager was still showing the Wifi was connected.

uname -r
4.13.0-16-lowlatency

dpkg -l linux-firmware | grep ii
ii  linux-firmware 1.169all  Firmware for Linux kernel drivers

lspci -vvv
02:00.0 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- SERR- 
Kernel driver in use: ath10k_pci
Kernel modules: ath10k_pci

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kai-Heng Feng]

I tried that in comment #58. It's already in linux-firmware.git.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[s.illes79]

anyone tried this from dell.com?
https://www.dell.com/support/article/uk/en/ukbsdt1/sln306440/killer-n1535-wireless-firmware-manual-update-guide-for-ubuntu-systems?lang=en

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Alexandru PLESCO]

Using ubuntu 17.10, kernel 4.13-0.15-generic on XPS 13 9360 QCA6174 rev 32.
Connection on 5Ghz band AC Freebox router.

Had the same problem, however browser speedtest [1] worked fine, except that 
any upload on nfs or cifs were from 0 to max 1MB/s with system freeze when 
uploading big files. 
Changed in networkmanager the MTU to 1400 (trial and error) and now the upload 
speed on nfs is around 25 MB/s.

Iperf still gives bad results for uploads.  On NFS the speed increases
from 2 MB/s - 25MB/s in about 5 seconds, so it seems that the TCP
algorithm is/was the problem here.

[1] http://www.speedtest.net/my-result/6703944909
http://pic.nperf.com/r/184530901-oTbTp0X2.png

The WIFI is the bottleneck here as over Ethernet I get ~
500mbps/200mbps.

I hope this helps.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kai-Heng Feng]

The number from iperf3 does show big difference between Windows 10 and
Linux.

Use speedtest.net to measure the speed, the gap is mainly on the upload
speed.

Ubuntu w/ Linux v4.14-rc4, latest linux-firmware.git,
cubic [1]:
Ping: 5 ms
Download: 82.29 Mbps
Upload: 59.94 Mbps

bbr [2]:
Ping: 4 ms
Download: 83.51 Mbps
Upload: 54.92 Mbps

Windows 10 [3]:
Ping: 3ms
Download: 84.08 Mbps
Upload: 76.56 Mbps

[1]: http://beta.speedtest.net/result/6699920423
[2]: http://beta.speedtest.net/result/6699960328
[3]: http://beta.speedtest.net/result/6699924242

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

4.13 without modifications:

http://paste.ubuntu.com/25499163/

scp (cubic)
➜  /tmp scp testfile srv:/tmp 
testfile

   8%   89MB   2.9MB/s   05:21 ETA

scp (bbr)
➜  /tmp scp testfile srv:/tmp 
testfile

   6%   67MB   1.7MB/s   09:09 ETA

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kir Kolyshkin]

This is with cubic:

limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 6);
min 123.00 max 220.00 avg 194.81 num 80

and reno:

limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 6);
min 129.00 max 224.00 avg 192.71 num 80

I suspect that iperf/iperf3 might not be a good (representative) test
after all. For example, the difference with wget is not so dramatic.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kir Kolyshkin]

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?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[André Brait Carneiro Fabotti]

Disabling Powersave in NetworkManager did it for me. I was barely
getting 300kB/s on certain workloads on my 2.4GHz network whereas I
could get full speed on my 5GHz one. By disabling the power management
in NetworkManager, I got full speed all the time and I haven't really
noticed any decrease in power consumption.

Running Ubuntu 16.04.2, Kernel 4.10 (HWE branch). Stock installation
done just a few minutes ago.

02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
Network Adapter (rev 32)


Doing the following will disable power saving in Network Manager by
default:

$ sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/'
/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Eric,

I should have tried cubic in the previous (#46) test - quite an
interesting result: http://paste.ubuntu.com/25200234/ (6 tests cubic &
bbr)

lspci | grep QCA
3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network 
Adapter (rev 32)

With cubic cwnd grows quite quickly and reaches 608 KBytes in the best
case while with bbr it converges to 8.48 KBytes regardless of the
constants used.

I will build a 4.13rc2 kernel without any modifications and perform the
same test to compare.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Philip Soares]

2,8 cubic

iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 49522 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  6.17 MBytes  51.7 Mbits/sec6   91.9 KBytes
[  4]   1.00-2.00   sec  8.34 MBytes  70.0 Mbits/sec7   93.3 KBytes
[  4]   2.00-3.00   sec  8.39 MBytes  70.4 Mbits/sec0117 KBytes
[  4]   3.00-4.00   sec  8.31 MBytes  69.7 Mbits/sec6107 KBytes
[  4]   4.00-5.00   sec  9.83 MBytes  82.4 Mbits/sec0139 KBytes
[  4]   5.00-6.00   sec  10.9 MBytes  91.6 Mbits/sec0168 KBytes
[  4]   6.00-7.00   sec  11.0 MBytes  92.2 Mbits/sec0180 KBytes
[  4]   7.00-8.00   sec  11.1 MBytes  92.7 Mbits/sec0189 KBytes
[  4]   8.00-9.00   sec  11.1 MBytes  93.3 Mbits/sec0199 KBytes
[  4]   9.00-10.00  sec  11.2 MBytes  94.2 Mbits/sec0206 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  96.4 MBytes  80.8 Mbits/sec   19 sender
[  4]   0.00-10.00  sec  96.2 MBytes  80.7 Mbits/sec  receiver

2,8 bbr

iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 49526 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  4.76 MBytes  39.9 Mbits/sec0   14.1 KBytes
[  4]   1.00-2.00   sec  3.77 MBytes  31.6 Mbits/sec0   14.1 KBytes
[  4]   2.00-3.00   sec  3.47 MBytes  29.1 Mbits/sec0   14.1 KBytes
[  4]   3.00-4.00   sec  2.91 MBytes  24.4 Mbits/sec0   11.3 KBytes
[  4]   4.00-5.00   sec  3.31 MBytes  27.7 Mbits/sec0   14.1 KBytes
[  4]   5.00-6.00   sec  3.25 MBytes  27.3 Mbits/sec0   14.1 KBytes
[  4]   6.00-7.00   sec  3.30 MBytes  27.7 Mbits/sec0   14.1 KBytes
[  4]   7.00-8.00   sec  3.04 MBytes  25.5 Mbits/sec0   14.1 KBytes
[  4]   8.00-9.00   sec  2.97 MBytes  24.9 Mbits/sec0   11.3 KBytes
[  4]   9.00-10.00  sec  3.44 MBytes  28.8 Mbits/sec0   14.1 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  34.2 MBytes  28.7 Mbits/sec0 sender
[  4]   0.00-10.00  sec  34.0 MBytes  28.6 Mbits/sec  receiver

4,7 cubic

iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 44612 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  10.7 MBytes  89.9 Mbits/sec0229 KBytes
[  4]   1.00-2.00   sec  10.3 MBytes  86.1 Mbits/sec1205 KBytes
[  4]   2.00-3.00   sec  11.2 MBytes  93.7 Mbits/sec0230 KBytes
[  4]   3.00-4.00   sec  11.1 MBytes  93.2 Mbits/sec0243 KBytes
[  4]   4.00-5.00   sec  11.3 MBytes  94.8 Mbits/sec0250 KBytes
[  4]   5.00-6.00   sec  11.4 MBytes  95.7 Mbits/sec0255 KBytes
[  4]   6.00-7.00   sec  11.2 MBytes  93.9 Mbits/sec0255 KBytes
[  4]   7.00-8.00   sec  11.5 MBytes  96.6 Mbits/sec0255 KBytes
[  4]   8.00-9.00   sec  11.2 MBytes  94.2 Mbits/sec0262 KBytes
[  4]   9.00-10.00  sec  11.2 MBytes  93.6 Mbits/sec0279 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec   111 MBytes  93.2 Mbits/sec1 sender
[  4]   0.00-10.00  sec   111 MBytes  92.9 Mbits/sec  receiver

4,7 bbr

# iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 44616 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  4.54 MBytes  38.0 Mbits/sec0   14.1 KBytes
[  4]   1.00-2.00   sec  3.70 MBytes  31.1 Mbits/sec0   14.1 KBytes
[  4]   2.00-3.00   sec  3.45 MBytes  28.9 Mbits/sec0   14.1 KBytes
[  4]   3.00-4.00   sec  3.68 MBytes  30.8 Mbits/sec0   14.1 KBytes
[  4]   4.00-5.00   sec  3.29 MBytes  27.6 Mbits/sec0   11.3 KBytes
[  4]   5.00-6.00   sec  3.00 MBytes  25.2 Mbits/sec1   14.1 KBytes
[  4]   6.00-7.00   sec  3.18 MBytes  26.6 Mbits/sec0   11.3 KBytes
[  4]   7.00-8.00   sec  2.85 MBytes  23.9 Mbits/sec0   11.3 KBytes
[  4]   8.00-9.00   sec  3.11 MBytes  26.1 Mbits/sec0   14.1 KBytes
[  4]   9.00-10.00  sec  2.99 MBytes  25.1 Mbits/sec0   11.3 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  33.8 MBytes  28.3 Mbits/sec1 sender
[  4]   0.00-10.00  sec  33.7 MBytes  28.2 Mbits/sec  receiver

4,8 cubic

 iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 56590 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  10.4 MBytes  87.2 Mbits/sec0243 KBytes
[  4]   1.00-2.00   sec  11.7 MBytes  98.0 Mbits/sec0305 KBytes
[  4]  

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Philip Soares]

4.13-rc2 + tcp_output.c

-   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10);
+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 7);

w/ cubic

% iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 47742 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  9.16 MBytes  76.8 Mbits/sec0218 KBytes
[  4]   1.00-2.00   sec  10.4 MBytes  87.5 Mbits/sec0286 KBytes
[  4]   2.00-3.00   sec  9.72 MBytes  81.5 Mbits/sec0301 KBytes
[  4]   3.00-4.00   sec  9.95 MBytes  83.5 Mbits/sec0301 KBytes
[  4]   4.00-5.00   sec  9.70 MBytes  81.3 Mbits/sec0301 KBytes
[  4]   5.00-6.00   sec  9.77 MBytes  81.9 Mbits/sec0301 KBytes
[  4]   6.00-7.00   sec  10.2 MBytes  85.6 Mbits/sec0301 KBytes
[  4]   7.00-8.00   sec  9.92 MBytes  83.2 Mbits/sec0301 KBytes
[  4]   8.00-9.00   sec  10.0 MBytes  84.0 Mbits/sec0345 KBytes
[  4]   9.00-10.00  sec  10.2 MBytes  85.6 Mbits/sec0345 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  99.1 MBytes  83.1 Mbits/sec0 sender
[  4]   0.00-10.00  sec  98.5 MBytes  82.6 Mbits/sec  receiver

w/ bbr

iperf3 -c dest
Connecting to host dest, port 5201
[  4] local src port 42308 connected to dest port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  3.16 MBytes  26.5 Mbits/sec0   11.3 KBytes
[  4]   1.00-2.00   sec  2.58 MBytes  21.7 Mbits/sec0   11.3 KBytes
[  4]   2.00-3.00   sec  2.54 MBytes  21.3 Mbits/sec0   11.3 KBytes
[  4]   3.00-4.00   sec  2.68 MBytes  22.5 Mbits/sec0   11.3 KBytes
[  4]   4.00-5.00   sec  2.55 MBytes  21.4 Mbits/sec0   11.3 KBytes
[  4]   5.00-6.00   sec  2.53 MBytes  21.2 Mbits/sec0   11.3 KBytes
[  4]   6.00-7.00   sec  2.72 MBytes  22.8 Mbits/sec0   14.1 KBytes
[  4]   7.00-8.00   sec  2.88 MBytes  24.1 Mbits/sec0   11.3 KBytes
[  4]   8.00-9.00   sec  2.55 MBytes  21.4 Mbits/sec0   11.3 KBytes
[  4]   9.00-10.00  sec  2.86 MBytes  24.0 Mbits/sec0   14.1 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  27.1 MBytes  22.7 Mbits/sec0 sender
[  4]   0.00-10.00  sec  27.0 MBytes  22.6 Mbits/sec  receiver

HTH

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

Sorry if I was not clear, but I would like to combine #42 and #44
experiments.

Ie making sure that even with BBR on linux-4.3-rc1/rc2 (without FQ
packet qdisc), we can simply tweak TCP Small queue threshold as #42
results would suggest to resolve this bug.

Thanks !

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Eric, the UDP measurement was to provide a rough estimate of what the AP
is capable of sustaining without congestion control and flow control.

I did not have a different card at hand, but right now I can provide a
similar measurement for comparison with the problematic card:

$ lspci | grep Wire
02:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)

$ uname -r
4.13.0-041300rc1-generic

$ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr

$ iperf3 -c rtr   
Connecting to host rtr, port 5201
[  4] local 10.10.10.208 port 33286 connected to rtr port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  8.82 MBytes  73.9 Mbits/sec0   62.2 KBytes   
[  4]   1.00-2.00   sec  9.88 MBytes  82.9 Mbits/sec0   56.6 KBytes   
[  4]   2.00-3.00   sec  10.2 MBytes  85.5 Mbits/sec0   56.6 KBytes   
[  4]   3.00-4.00   sec  9.63 MBytes  80.8 Mbits/sec0   56.6 KBytes   
[  4]   4.00-5.00   sec  10.3 MBytes  86.5 Mbits/sec0   62.2 KBytes   
[  4]   5.00-6.00   sec  10.1 MBytes  84.4 Mbits/sec0   62.2 KBytes   
[  4]   6.00-7.00   sec  10.0 MBytes  83.9 Mbits/sec0   62.2 KBytes   
[  4]   7.00-8.00   sec  9.26 MBytes  77.7 Mbits/sec0   62.2 KBytes   
[  4]   8.00-9.00   sec  10.3 MBytes  86.0 Mbits/sec0   84.8 KBytes   
[  4]   9.00-10.00  sec  10.2 MBytes  85.5 Mbits/sec0   70.7 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  98.6 MBytes  82.7 Mbits/sec0 sender

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Philip Soares]

Hi Eric,

This compares Cubic with BBR with 4.13-rc2 (which has a few new commits
to bbr.c):

wlan0:  mtu 1500 qdisc mq state UP mode
DORMANT group default qlen 1000

$ cat  /proc/sys/net/ipv4/tcp_congestion_control
cubic
$ iperf3 -c
Connecting to host , port 5201
[  4] local  port 35242 connected to  port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  2.34 MBytes  19.6 Mbits/sec0   26.9 KBytes
[  4]   1.00-2.00   sec  2.45 MBytes  20.6 Mbits/sec0   26.9 KBytes
[  4]   2.00-3.00   sec  2.36 MBytes  19.8 Mbits/sec0   26.9 KBytes
[  4]   3.00-4.00   sec  2.43 MBytes  20.4 Mbits/sec0   26.9 KBytes
[  4]   4.00-5.00   sec  2.42 MBytes  20.3 Mbits/sec0   26.9 KBytes
[  4]   5.00-6.00   sec  2.33 MBytes  19.5 Mbits/sec0   29.7 KBytes
[  4]   6.00-7.00   sec  2.48 MBytes  20.8 Mbits/sec0   29.7 KBytes
[  4]   7.00-8.00   sec  2.27 MBytes  19.1 Mbits/sec0   29.7 KBytes
[  4]   8.00-9.00   sec  2.45 MBytes  20.6 Mbits/sec0   29.7 KBytes
[  4]   9.00-10.00  sec  2.43 MBytes  20.4 Mbits/sec0   29.7 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  24.0 MBytes  20.1 Mbits/sec0 sender
[  4]   0.00-10.00  sec  23.9 MBytes  20.1 Mbits/sec  receiver
$ echo bbr > /proc/sys/net/ipv4/tcp_congestion_control
$ iperf3 -c
Connecting to host , port 5201
[  4] local  port 35246 connected to  port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  1.69 MBytes  14.2 Mbits/sec0   8.48 KBytes
[  4]   1.00-2.00   sec  1.59 MBytes  13.4 Mbits/sec0   8.48 KBytes
[  4]   2.00-3.00   sec  1.43 MBytes  12.0 Mbits/sec0   8.48 KBytes
[  4]   3.00-4.00   sec  1.63 MBytes  13.6 Mbits/sec0   8.48 KBytes
[  4]   4.00-5.00   sec  1.59 MBytes  13.4 Mbits/sec0   8.48 KBytes
[  4]   5.00-6.00   sec  1.50 MBytes  12.6 Mbits/sec0   8.48 KBytes
[  4]   6.00-7.00   sec  1.59 MBytes  13.3 Mbits/sec0   8.48 KBytes
[  4]   7.00-8.00   sec  1.59 MBytes  13.3 Mbits/sec0   8.48 KBytes
[  4]   8.00-9.00   sec  1.60 MBytes  13.4 Mbits/sec0   8.48 KBytes
[  4]   9.00-10.00  sec  1.63 MBytes  13.6 Mbits/sec0   8.48 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  15.8 MBytes  13.3 Mbits/sec0 sender
[  4]   0.00-10.00  sec  15.8 MBytes  13.2 Mbits/sec  receiver

Hope that helps.

Taking a step back, the original issue for me here is that using a
MacBook Air at the same location and with the same BSSID throughput (for
TCP is about 100Mbits/sec). Of course it's a different phy and stack but
we should be able to get much better throughput from the Atheros phy,
driver and TCP stack in this scenario without very much tuning.

Patching tcp_output.c as above did make a significant difference (though
not quite making up the full difference) but it looks like using BBR on
the client doesn't.

Are you thinking the solution lies down the path of  using BBR? Could
you tell what you would expect to see results-wise in using BBR over
others in this scenario?

Thanks! Appreciate your input to this!

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

Please do not compare UDP and TCP, this is absolutely useless.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Likewise, on a non-congested network (802.11ac), directly from the
laptop to the AP:

uname -r
4.13.0-rc1

➜  linux git:(5771a8c08880) ✗ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr

➜  linux git:(5771a8c08880) ✗ iperf3 -u -b 1000M -c rtr
Connecting to host rtr, port 5201
[  4] local 10.10.10.76 port 49939 connected to rtr port 5201
[ ID] Interval   Transfer Bandwidth   Total Datagrams
[  4]   0.00-1.00   sec  24.6 MBytes   207 Mbits/sec  3153  
[  4]   1.00-2.00   sec  27.2 MBytes   228 Mbits/sec  3484  
[  4]   2.00-3.00   sec  26.9 MBytes   226 Mbits/sec  3441  
[  4]   3.00-4.00   sec  26.8 MBytes   225 Mbits/sec  3432  
[  4]   4.00-5.00   sec  27.0 MBytes   226 Mbits/sec  3453  
[  4]   5.00-6.00   sec  27.2 MBytes   228 Mbits/sec  3479  
[  4]   6.00-7.00   sec  26.7 MBytes   224 Mbits/sec  3421  
[  4]   7.00-8.00   sec  27.3 MBytes   229 Mbits/sec  3492  
[  4]   8.00-9.00   sec  27.2 MBytes   228 Mbits/sec  3484  
[  4]   9.00-10.00  sec  27.0 MBytes   227 Mbits/sec  3457  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   JitterLost/Total 
Datagrams
[  4]   0.00-10.00  sec   268 MBytes   225 Mbits/sec  0.035 ms  8231/34295 
(24%)  
[  4] Sent 34295 datagrams

iperf Done.

➜  linux git:(5771a8c08880) ✗ iperf3 -c rtr
Connecting to host rtr, port 5201
[  4] local 10.10.10.76 port 48172 connected to rtr port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  1.70 MBytes  14.2 Mbits/sec0   11.3 KBytes   
[  4]   1.00-2.00   sec  1.59 MBytes  13.4 Mbits/sec0   8.48 KBytes   
[  4]   2.00-3.00   sec  1.49 MBytes  12.5 Mbits/sec0   11.3 KBytes   
[  4]   3.00-4.00   sec  1.54 MBytes  12.9 Mbits/sec0   11.3 KBytes   
[  4]   4.00-5.00   sec  1.55 MBytes  13.0 Mbits/sec0   8.48 KBytes   
[  4]   5.00-6.00   sec  1.50 MBytes  12.6 Mbits/sec0   8.48 KBytes   
[  4]   6.00-7.00   sec  1.50 MBytes  12.6 Mbits/sec0   8.48 KBytes   
[  4]   7.00-8.00   sec  1.47 MBytes  12.3 Mbits/sec0   8.48 KBytes   
[  4]   8.00-9.00   sec  1.32 MBytes  11.1 Mbits/sec0   8.48 KBytes   
[  4]   9.00-10.00  sec  1.43 MBytes  12.0 Mbits/sec0   8.48 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  15.1 MBytes  12.7 Mbits/sec0 sender
[  4]   0.00-10.00  sec  15.0 MBytes  12.6 Mbits/sec  receiver

iperf Done.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

I've built a 4.13-rc1 (5771a8c08880) kernel and have done some laptop
(4.13, bbr) <-> AP <-> laptop (4.4 cubic) tests. Not sure about the AP
and there is a fair amount of wireless devices on the network I was
connected to. Most of them have Cubic congestion control but I am not
sure how fair they shared bandwidth.

There are also 2 tests with one of the public iperf3 servers from this
list https://iperf.fr/iperf-servers.php which give about the same perf
results. I think the network I am now has ~60 Mbit/s cap or rate limit
per client.

Cwnd seems to mostly cap at 14.1 KBytes for the first set of tests.

I will run some more tests on a faster and less congested network in 2
days with bbr.

Until then, what I see is that I can get ~ 4 times more data through
with UDP.

uname -r
4.13.0-rc1

➜  linux git:(5771a8c08880) ✗ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr
➜  linux git:(5771a8c08880) ✗ lsmod | grep bbr 
tcp_bbr20480  45


iperf3 -c 10.155.13.90
Connecting to host 10.155.13.90, port 5201
[  4] local 10.155.9.186 port 37980 connected to 10.155.13.90 port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec   991 KBytes  8.12 Mbits/sec1   11.3 KBytes   
[  4]   1.00-2.00   sec   938 KBytes  7.68 Mbits/sec0   14.1 KBytes   
[  4]   2.00-3.00   sec   923 KBytes  7.56 Mbits/sec0   11.3 KBytes   
[  4]   3.00-4.00   sec   650 KBytes  5.33 Mbits/sec0   11.3 KBytes   
[  4]   4.00-5.00   sec  1.02 MBytes  8.56 Mbits/sec0   11.3 KBytes   
[  4]   5.00-6.00   sec   863 KBytes  7.07 Mbits/sec0   14.1 KBytes   
[  4]   6.00-7.00   sec  1.20 MBytes  10.1 Mbits/sec0   14.1 KBytes   
[  4]   7.00-8.00   sec   826 KBytes  6.77 Mbits/sec0   14.1 KBytes   
[  4]   8.00-9.00   sec  1.09 MBytes  9.12 Mbits/sec0   11.3 KBytes   
[  4]   9.00-10.00  sec   658 KBytes  5.39 Mbits/sec0   14.1 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  9.02 MBytes  7.57 Mbits/sec1 sender
[  4]   0.00-10.00  sec  8.92 MBytes  7.48 Mbits/sec  receiver

iperf Done.


iperf3 -u -b 1000M -c 10.155.13.90
Connecting to host 10.155.13.90, port 5201
[  4] local 10.155.9.186 port 44086 connected to 10.155.13.90 port 5201
[ ID] Interval   Transfer Bandwidth   Total Datagrams
[  4]   0.00-1.00   sec  3.63 MBytes  30.5 Mbits/sec  465  
[  4]   1.00-2.00   sec  4.03 MBytes  33.8 Mbits/sec  516  
[  4]   2.00-3.00   sec  4.45 MBytes  37.3 Mbits/sec  569  
[  4]   3.00-4.00   sec  4.68 MBytes  39.3 Mbits/sec  599  
[  4]   4.00-5.00   sec  5.48 MBytes  45.9 Mbits/sec  701  
[  4]   5.00-6.00   sec  5.52 MBytes  46.3 Mbits/sec  707  
[  4]   6.00-7.00   sec  5.25 MBytes  44.0 Mbits/sec  672  
[  4]   7.00-8.00   sec  4.57 MBytes  38.3 Mbits/sec  585  
[  4]   8.00-9.00   sec  4.64 MBytes  38.9 Mbits/sec  594  
[  4]   9.00-10.00  sec  5.50 MBytes  46.1 Mbits/sec  704  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   JitterLost/Total 
Datagrams
[  4]   0.00-10.00  sec  47.8 MBytes  40.1 Mbits/sec  1.650 ms  26/6111 (0.43%) 
 
[  4] Sent 6111 datagrams

iperf Done.


iperf3 -c 10.155.13.90
Connecting to host 10.155.13.90, port 5201
[  4] local 10.155.9.186 port 37988 connected to 10.155.13.90 port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  1.18 MBytes  9.89 Mbits/sec0   11.3 KBytes   
[  4]   1.00-2.00   sec  1.10 MBytes  9.27 Mbits/sec0   14.1 KBytes   
[  4]   2.00-3.00   sec  1.16 MBytes  9.70 Mbits/sec0   11.3 KBytes   
[  4]   3.00-4.00   sec  1.06 MBytes  8.91 Mbits/sec0   14.1 KBytes   
[  4]   4.00-5.00   sec  1.05 MBytes  8.79 Mbits/sec0   11.3 KBytes   
[  4]   5.00-6.00   sec  1.07 MBytes  8.96 Mbits/sec0   14.1 KBytes   
[  4]   6.00-7.00   sec   922 KBytes  7.55 Mbits/sec0   14.1 KBytes   
[  4]   7.00-8.00   sec  1.09 MBytes  9.17 Mbits/sec0   14.1 KBytes   
[  4]   8.00-9.00   sec  1.12 MBytes  9.41 Mbits/sec0   14.1 KBytes   
[  4]   9.00-10.00  sec   987 KBytes  8.09 Mbits/sec0   14.1 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  10.7 MBytes  8.97 Mbits/sec0 sender
[  4]   0.00-10.00  sec  10.6 MBytes  8.91 Mbits/sec  receiver

iperf Done.


---

➜  linux git:(5771a8c08880) ✗ iperf3 -c iperf.volia.net 
Connecting to host iperf.volia.net, port 5201
[  4] local 10.155.9.186 port 40964 connected to 82.144.193.18 port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  1.32 MBytes  11.0 Mbits/sec0341 KBytes   
[  4]   1.00-2.00   sec  1.64 

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

Kirill, would it be possible to run again your experiments, but using
bbr congestion control ?

Note that you should use 4.13-rc1 so that following commit is included :
commit 218af599fa635b107cfe10acf3249c4dfe5e4123 ("tcp: internal implementation 
for pacing")
 

lpaa5:~# modprobe tcp_bbr
lpaa5:~# cat /proc/sys/net/ipv4/tcp_available_congestion_control
cubic reno bbr
lpaa5:~# cat /proc/sys/net/ipv4/tcp_congestion_control
cubic
lpaa5:~# echo bbr >/proc/sys/net/ipv4/tcp_congestion_control
lpaa5:~# cat /proc/sys/net/ipv4/tcp_congestion_control
bbr



-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

Thanks to all of you for the tests, sorry for the delay, I have been on
vacation last week.

Yes, the plan is to permanently change TCP stack, since TCP Small queue
being very aggressive is no longer needed when FQ packet scheduler or
BBR congestion module is used for TCP.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kir Kolyshkin]

Eric, thank you for looking at it! I have measured all four variants
that you have suggested, as well as the default ones, using linux-4.12.1
as a base.

The summary of measurements is below. Note that
 - min/max/avg is in Mbits/sec;
 - n is number of measurements, each of 1 second.

+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10);
min  0.00 max 39.60 avg 19.09 num 80

+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 7);
min 30.00 max 219.00 avg 174.15 num 80

+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8);
min  0.00 max 220.00 avg 114.34 num 80

+   limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 7);
min  8.47 max 95.80 avg 68.80 num 80

+   limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 8);
min 20.20 max 169.00 avg 122.09 num 60

Despite the great discrepancy in results, it can be seen that
 - changing the values helps a lot
 - numbers 2 and 7 works the best for me.

The script to produce the output above is here:

kir@kd:~/wifiperf$ cat cal 
awk '
BEGIN {min=99; max=n=sum=0;}
NR==1 { print }
$NF=="KBytes" {
val=$7;
if (val > max) max = val;
if (val < min) min = val;
sum += val;
n = n+1;
}
END {
printf("min %5.2f max %5.2f avg %5.2f num %d\n", min, max, 
sum/n, n)
}'

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

4.12 + the first change from
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/33
+ 802.11ac network => looks better.

➜  linux git:(6f7da290413b) ✗ git --no-pager diff 
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 4858e190f6ac..abcfecfb8bbe 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2102,7 +2102,7 @@ static bool tcp_small_queue_check(struct sock *sk, const 
struct sk_buff *skb,
 {
unsigned int limit;
 
-   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10);
+   limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 8);
limit = min_t(u32, limit, sysctl_tcp_limit_output_bytes);
limit <<= factor;
 


 uname -a  
Linux blade 4.12.0-custom #1 SMP Fri Jul 14 02:49:01 MSK 2017 x86_64 x86_64 
x86_64 GNU/Linux

iperf3 -c us
Connecting to host us, port 5201
[  4] local 10.10.10.76 port 50346 connected to 10.10.10.30 port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  27.2 MBytes   228 Mbits/sec0215 KBytes   
[  4]   1.00-2.00   sec  32.2 MBytes   270 Mbits/sec0298 KBytes   
[  4]   2.00-3.00   sec  31.5 MBytes   265 Mbits/sec0397 KBytes   
[  4]   3.00-4.00   sec  31.8 MBytes   267 Mbits/sec0444 KBytes   
[  4]   4.00-5.00   sec  31.5 MBytes   265 Mbits/sec0444 KBytes   
[  4]   5.00-6.00   sec  31.5 MBytes   264 Mbits/sec0444 KBytes   
[  4]   6.00-7.00   sec  31.3 MBytes   263 Mbits/sec0444 KBytes   
[  4]   7.00-8.00   sec  31.5 MBytes   264 Mbits/sec0444 KBytes   
[  4]   8.00-9.00   sec  31.3 MBytes   262 Mbits/sec0444 KBytes   
^C[  4]   9.00-9.94   sec  29.3 MBytes   263 Mbits/sec0444 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-9.94   sec   309 MBytes   261 Mbits/sec0 sender
[  4]   0.00-9.94   sec  0.00 Bytes  0.00 bits/sec  receiver
iperf3: interrupt - the client has terminated

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[OlegKrikun]

I noticed strange behavior.

iperf still get 20-30Mbps, but wget have 5-9MBps.

kernel 4.12 without any paths

$ wget http://cdimage.ubuntu.com/daily-live/current/artful-desktop-amd64.iso
--2017-07-12 19:17:23--  
http://cdimage.ubuntu.com/daily-live/current/artful-desktop-amd64.iso
Resolving cdimage.ubuntu.com (cdimage.ubuntu.com)... 91.189.88.39
Connecting to cdimage.ubuntu.com (cdimage.ubuntu.com)|91.189.88.39|:80... 
connected.
HTTP request sent, awaiting response... 200 OK
Length: 1621032960 (1.5G) [application/x-iso9660-image]
Saving to: ‘artful-desktop-amd64.iso.1’

artful-desktop-amd64.iso.1
100%[=>]
1.51G  8.08MB/sin 3m 33s

2017-07-12 19:20:57 (7.24 MB/s) - ‘artful-desktop-amd64.iso.1’ saved
[1621032960/1621032960]

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Jeffrey]

FYI, I'm using an XPS 15 9560, from this page: 
https://wiki.archlinux.org/index.php/Dell_XPS_13_(9360)#Wireless 
It says:
"The Killer 1535 Wirless Adapter is functional and the ath10k firmware is 
included in recent linux kernel versions. The connection speed reported by iw 
is limited to 1-6Mbits/s. However this is just the output being wrong. The real 
connection speed is not limited to this value.
Some users are experiencing issues, where the connection is dropped under heavy 
load but reconnects within a brief moment. This might not be noticed during 
browsing at all but becomes apparent in online games. There is no know solution 
so far."

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Philip Soares]

Eric,

Is this patch the basis for a more permanent and general fix (it seems
not specific to ath10k)?

Thanks!

The patch produces a marked improvement with TCP from the local QCA6174
client to AP/remote.

4.12.0 (UDP; no patch)

% iperf3 -u -b 1000M -c remote
Connecting to host remote, port 5201
[  4] local local port 42530 connected to remote port 5201
[ ID] Interval   Transfer Bandwidth   Total Datagrams
[  4]   0.00-1.00   sec  14.8 MBytes   124 Mbits/sec  10725  
[  4]   1.00-2.00   sec  17.8 MBytes   150 Mbits/sec  12924  
[  4]   2.00-3.00   sec  19.0 MBytes   160 Mbits/sec  13773  
[  4]   3.00-4.00   sec  18.1 MBytes   152 Mbits/sec  13118  
[  4]   4.00-5.00   sec  18.7 MBytes   157 Mbits/sec  13555  
[  4]   5.00-6.00   sec  18.0 MBytes   151 Mbits/sec  13064  
[  4]   6.00-7.00   sec  17.4 MBytes   146 Mbits/sec  12584  
[  4]   7.00-8.00   sec  16.8 MBytes   141 Mbits/sec  12141  
[  4]   8.00-9.00   sec  16.8 MBytes   141 Mbits/sec  12201  
[  4]   9.00-10.00  sec  17.2 MBytes   144 Mbits/sec  12442  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   JitterLost/Total 
Datagrams
[  4]   0.00-10.00  sec   175 MBytes   147 Mbits/sec  0.100 ms  0/126526 (0%)  
[  4] Sent 126526 datagrams

4.12.0 (TCP; no patch)

% iperf3 -c remote
Connecting to host remote, port 5201
[  4] local local port 50394 connected to remote port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  2.37 MBytes  19.9 Mbits/sec0   29.7 KBytes
[  4]   1.00-2.00   sec  2.53 MBytes  21.2 Mbits/sec0   29.7 KBytes
[  4]   2.00-3.00   sec  2.43 MBytes  20.4 Mbits/sec0   29.7 KBytes
[  4]   3.00-4.00   sec  2.52 MBytes  21.2 Mbits/sec0   29.7 KBytes
[  4]   4.00-5.00   sec  2.53 MBytes  21.2 Mbits/sec0   29.7 KBytes
[  4]   5.00-6.00   sec  2.55 MBytes  21.4 Mbits/sec0   29.7 KBytes
[  4]   6.00-7.00   sec  2.55 MBytes  21.4 Mbits/sec0   29.7 KBytes
[  4]   7.00-8.00   sec  2.48 MBytes  20.8 Mbits/sec0   29.7 KBytes
[  4]   8.00-9.00   sec  2.55 MBytes  21.4 Mbits/sec0   29.7 KBytes
[  4]   9.00-10.00  sec  2.47 MBytes  20.7 Mbits/sec0   29.7 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec  25.0 MBytes  21.0 Mbits/sec0 sender
[  4]   0.00-10.00  sec  25.0 MBytes  20.9 Mbits/sec  receiver

4.12.0 (TCP; _with_ patch)
+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8);

% iperf3 -c remote
Connecting to host remote, port 5201
[  4] local local port 59780 connected to remote port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  13.4 MBytes   113 Mbits/sec0181 KBytes   
[  4]   1.00-2.00   sec  16.9 MBytes   142 Mbits/sec0216 KBytes   
[  4]   2.00-3.00   sec  16.7 MBytes   140 Mbits/sec0252 KBytes   
[  4]   3.00-4.00   sec  17.2 MBytes   145 Mbits/sec0280 KBytes   
[  4]   4.00-5.00   sec  17.4 MBytes   146 Mbits/sec0317 KBytes   
[  4]   5.00-6.00   sec  16.9 MBytes   142 Mbits/sec0332 KBytes   
[  4]   6.00-7.00   sec  17.7 MBytes   149 Mbits/sec0332 KBytes   
[  4]   7.00-8.00   sec  18.2 MBytes   153 Mbits/sec0386 KBytes   
[  4]   8.00-9.00   sec  17.9 MBytes   150 Mbits/sec0386 KBytes   
[  4]   9.00-10.00  sec  17.3 MBytes   145 Mbits/sec0386 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-10.00  sec   170 MBytes   142 Mbits/sec0 sender
[  4]   0.00-10.00  sec   169 MBytes   142 Mbits/sec  receiver

4.12.0 (TCP; _with_ patch)
+   limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 7);

% iperf3 -c remote
Connecting to host remote, port 5201
[  4] local local port 55672 connected to remote port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec  12.5 MBytes   105 Mbits/sec2132 KBytes   
[  4]   1.00-2.00   sec  17.3 MBytes   145 Mbits/sec0181 KBytes   
[  4]   2.00-3.00   sec  18.1 MBytes   152 Mbits/sec0211 KBytes   
[  4]   3.00-4.00   sec  18.6 MBytes   156 Mbits/sec0225 KBytes   
[  4]   4.00-5.00   sec  17.9 MBytes   151 Mbits/sec0242 KBytes   
[  4]   5.00-6.00   sec  17.0 MBytes   142 Mbits/sec0253 KBytes   
[  4]   6.00-7.00   sec  17.5 MBytes   146 Mbits/sec0262 KBytes   
[  4]   7.00-8.00   sec  18.5 MBytes   155 Mbits/sec0269 KBytes   
[  4]   8.00-9.00   sec  17.9 MBytes   150 Mbits/sec0272 KBytes   
[  4]   9.00-10.00  sec  18.0 MBytes   151 Mbits/sec0277 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Tested with http://kernel.ubuntu.com/~jsalisbury/lp1670041/ on a 2.4 GHz
network.

iperf3: interrupt - the client has terminated
➜  ~ uname -r
4.10.0-26-generic

# UDP
➜  ~ iperf3 -u -b 1000M -c 
Connecting to host , port 5201
[  4] local 172.29.10.20 port 37973 connected to  port 5201
[ ID] Interval   Transfer Bandwidth   Total Datagrams
[  4]   0.00-1.00   sec  9.69 MBytes  81.2 Mbits/sec  1240  
[  4]   1.00-2.00   sec  11.6 MBytes  97.2 Mbits/sec  1483  
[  4]   2.00-3.00   sec  11.9 MBytes  99.8 Mbits/sec  1523  
[  4]   3.00-4.00   sec  10.7 MBytes  89.4 Mbits/sec  1364  
^C[  4]   4.00-4.87   sec  10.3 MBytes  98.6 Mbits/sec  1316  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   JitterLost/Total 
Datagrams
[  4]   0.00-4.87   sec  54.1 MBytes  93.1 Mbits/sec  0.000 ms  0/6926 (0%)  
[  4] Sent 6926 datagrams
iperf3: interrupt - the client has terminated

# TCP
➜  ~ iperf3 -c  
Connecting to host , port 5201
[  4] local 172.29.10.20 port 52878 connected to  port 5201
[ ID] Interval   Transfer Bandwidth   Retr  Cwnd
[  4]   0.00-1.00   sec   745 KBytes  6.10 Mbits/sec0   67.9 KBytes   
[  4]   1.00-2.00   sec   659 KBytes  5.40 Mbits/sec0   97.6 KBytes   
[  4]   2.00-3.00   sec   680 KBytes  5.57 Mbits/sec0129 KBytes   
[  4]   3.00-4.00   sec   659 KBytes  5.40 Mbits/sec0158 KBytes   
[  4]   4.00-5.00   sec   662 KBytes  5.42 Mbits/sec0189 KBytes   
[  4]   5.00-6.00   sec   677 KBytes  5.55 Mbits/sec0219 KBytes   
[  4]   6.00-7.00   sec   663 KBytes  5.43 Mbits/sec0250 KBytes   
^C[  4]   7.00-7.71   sec   359 KBytes  4.15 Mbits/sec0272 KBytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bandwidth   Retr
[  4]   0.00-7.71   sec  4.99 MBytes  5.42 Mbits/sec0 sender
[  4]   0.00-7.71   sec  0.00 Bytes  0.00 bits/sec  receiver

Will try other patches as well:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/33

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Eric,

I will try to test it on Monday as I have a pretty slow uplink where I
am currently.

Hopefully, I will get back to my 5 GHz network on Thursday to do a
proper comparison with the data I had before.

Thanks a lot for the feedback and suggestions - really appreciate it!

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

For those who want to test it, I built a test kernel with the patch
posted in comment #31.  It can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1670041/

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[OlegKrikun]

Yesterday something went wrong o_O

I recheck "limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8);" to.


limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8); (4.10.0-26)

[  3]  0.0-10.0 sec  83.6 MBytes  70.1 Mbits/sec


limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 8); (4.10.0-26)

[  3]  0.0-10.0 sec  89.6 MBytes  75.0 Mbits/sec


limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 7); (4.10.0-26)

[  3]  0.0-10.0 sec  73.8 MBytes  61.8 Mbits/sec


limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 7); (4.10.0-26)

[  3]  0.0-10.0 sec   114 MBytes  95.2 Mbits/sec


4.12.0-041200-generic

[  3]  0.0-10.0 sec  38.1 MBytes  32.0 Mbits/sec


4.10.0-26-generic

[  3]  0.0-10.0 sec  21.9 MBytes  18.3 Mbits/sec

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

Thanks, can you now try :

 limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 8);

Then :

 limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 7);

Then :

 limit = max(4 * skb->truesize, sk->sk_pacing_rate >> 7);

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[OlegKrikun]

edumazet, i try out your path.

4.10.0-26 with path:

Client connecting to 192.168.1.1, TCP port 5001
TCP window size: 85.0 KByte (default)

[  3] local 192.168.1.169 port 39356 connected with 192.168.1.1 port 5001
[ ID] Interval   Transfer Bandwidth
[  3]  0.0-10.0 sec  30.9 MBytes  25.8 Mbits/sec
```

4.10.0-26 from ubuntu repo:

Client connecting to 192.168.1.1, TCP port 5001
TCP window size: 85.0 KByte (default)

[  3] local 192.168.1.169 port 34440 connected with 192.168.1.1 port 5001
[ ID] Interval   Transfer Bandwidth
[  3]  0.0-10.0 sec  24.8 MBytes  20.7 Mbits/sec

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Eric Dumazet]

skb_orphan() is not the way to go.

Can someone try the following patch ?

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 
4e985dea1dd24fdecfbf9b47d51cff698e97cd2f..5f394f2f524f6ac8d8d9bef50a1bfc99397d6724
 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2158,7 +2158,7 @@ static bool tcp_pacing_check(const struct sock *sk)
 }
 
 /* TCP Small Queues :
- * Control number of packets in qdisc/devices to two packets / or ~1 ms.
+ * Control number of packets in qdisc/devices to two packets / or ~4 ms.
  * (These limits are doubled for retransmits)
  * This allows for :
  *  - better RTT estimation and ACK scheduling
@@ -2173,7 +2173,7 @@ static bool tcp_small_queue_check(struct sock *sk, const 
struct sk_buff *skb,
 {
unsigned int limit;
 
-   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 10);
+   limit = max(2 * skb->truesize, sk->sk_pacing_rate >> 8);
limit = min_t(u32, limit, sysctl_tcp_limit_output_bytes);
limit <<= factor;

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

acelankao,

In 1692836 the same hack mentioned by Kalle was applied.

I am not sure it is a proper fix though as it has not landed upstream:

http://elixir.free-
electrons.com/linux/latest/source/drivers/net/wireless/ath/ath10k/mac.c#L4181

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[AceLan Kao]

Should be the same as bug 1692836 , and there should be a fix in kernel
4.4.0-83.106

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[OlegKrikun]

Also confirmed this bug on Dell XPS 15 (9560) with gnome ubuntu 17.04
and 4.10/4.12 kernels.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Re: [Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[dh]

Dell XPS owner, I would also suggest you hassle Dell.. selling a laptop
with Ubuntu installed, where one of the devices doesn't even work properly
is a bit of a d1ck move. I've reported the issue with them which they
promised would be relayed to their hw team. More reports can't hurt!
Not that it helps but the card swap I mentioned earlier was effective
(better range, throughput and speed reporting now correct (I failed to
gather useful data for comparison before the card swap though).

On 29 Jun 2017 23:45, "Kir Kolyshkin"  wrote:

> I also suffer from the same bug on dell xps 13 9360, tcp wi-fi is 5-10x
> slower than on other devices.
>
> @kalle we understand the patch you refer to is just a workaround, not a
> solution. Is anyone working on a real fix?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1670041
>
> Title:
>   Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
>   1535)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
> 1670041/+subscriptions
>

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kir Kolyshkin]

I also suffer from the same bug on dell xps 13 9360, tcp wi-fi is 5-10x
slower than on other devices.

@kalle we understand the patch you refer to is just a workaround, not a
solution. Is anyone working on a real fix?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

@kalle valeo, your patch appears to resolve this bug, but it still
exists in mainline.  Do you have plans to submit this patch upstream?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Federico Cupellini]

I have the same problemi with dell XPS 13 9360.
Here the wifi info 
(https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info) 
results, hope they are useful: http://paste.ubuntu.com/24848753/

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Koen Roggemans]

I see the same behavior as mikewiz38: via a webtest 104 Mbps download and in 
the graphical interface it lists as 6Mbps.
So speed is not bad - it just looks bad (on 16.04.1 with hwe kernel 4.8.0-53)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Juan Font]

Same here, #21. I have the same poor performance on 4.12-rc4.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Joseph,

No luck on 4.12.0-041200rc4-generic, unfortunately:
https://paste.ubuntu.com/24826561/

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Cemal Dalar]

I'm having the same problem. Using Dell XPS13 9360. I'm a developer but
doesn't know about kernel or modules. But any kind of test, I can try to
help if I have some instruction how to do it.

I really like to have this problem solved.




cd@cd-XPS-13-9360:~$ uname -a
Linux cd-XPS-13-9360 4.4.0-78-generic #99-Ubuntu SMP Thu Apr 27 15:29:09 UTC 
2017 x86_64 x86_64 x86_64 GNU/Linux

cd@cd-XPS-13-9360:~$ sudo lspci -vvv

3a: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- SERR- https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

It doesn't look like the specific patch posted in #11 ever made it into
mainline.  Can you test the v4.12-rc4 kernel to see if the bug was fixed
in a different way?  It can be downloaded from:

 http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc4

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

** Description changed:

+ 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/
  
- TL;DR with a bit of intuition:
- We need a new firmware-5.bin from Qualcomm Atheros for this rev 32 card in 
order to make it work well - if anybody has contacts there it would be nice to 
ask them to upload this to the upstream linux-firmware tree.
+ -
  
  3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless 
Network Adapter (rev 32)
  qca6174 hw3.2 target 0x0503 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 1.163all  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- 
SERR- 
  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 :3b:00.0: enabling device ( 
-> 0002)
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :3b:00.0: Direct firmware load 
for ath10k/pre-cal-pci-:3b:00.0.bin failed with error -2
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :3b:00.0: Direct firmware load 
for ath10k/cal-pci-:3b:00.0.bin failed with error -2
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :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 :3b:00.0: qca6174 hw3.2 target 
0x0503 chip_id 0x00340aff sub 1a56:1535
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :3b:00.0: kconfig debug 0 
debugfs 1 tracing 1 dfs 0 testmode 0
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :3b:00.0: board_file api 2 
bmi_id N/A crc32 6fc88fe7
  Mar 04 18:28:34 ubuntu kernel: ath10k_pci :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 

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Michael Wisniewski]

Just adding that I have the same problem on a Dell XPS13 9630 with the
same wifi card.  Interesting though that iperf will show poor
performance (10Mbit/s) but web based speedtest pages show 150Mbps.
Windows will also show about 100Mbit/s with iperf running while Ubuntu
will show just 10Mbit/s.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Tested the patched kernel - the results are consistent now across laptop
-> server, server -> laptop tests for both TCP and UDP.

➜  ~ uname -a
Linux blade 4.10.0-20-generic #22~lp1670041 SMP Fri May 5 18:23:15 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux

4 tests:
1) laptop -> server via AP (TCP);
2) laptop -> server via AP (UDP);
3) server -> laptop via AP (TCP);
4) server -> laptop via AP (UDP).

https://paste.ubuntu.com/24610258/

So with the patched kernel TCP performance seems to be fine.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Hi, just a quick update: I have not forgotten about trying out the new
kernel. I am currently geographically far away from the access point
that I used for testing and it is hard to find 802.11ac Wi-Fi in the
wild.

I will provide the test results once I get to the right environment.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Thanks Joseph! I will try it out.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

I built a Zesty test kernel with the patch posted in comment 11.  The
test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1670041/

Note, with this test kernel you need to install both the linux-image and
linux-image-extra .deb packages.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: linux (Ubuntu Zesty)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu)
   Status: Confirmed => In Progress

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Kalle,

The chip firmware was a guess based upon somebody else's feedback:
http://lists.infradead.org/pipermail/ath10k/2016-January/006714.html

It might not be true at all and I have done some investigation after
creating this bug report a month ago.

My notes from back then:

- iperf tcp vs udp performance measurements vary with QCA6174;
- iperf (2.0.5 2010) does report 200 Mbit/s on an Intel card (tcp workload);
- 200 Mbit/s is achievable on QCA6174 when generating UDP workloads via iperf;
- Upload performance (laptop -> router -> server) via rsync over ssh caps at 4 
MB/s ~~ 32 Mbit/s at first. May even reach 6 MB/s ~ 48 Mbit/s or 8.5 MB at some 
point. But it never reaches the peak UDP rates of 200Mbit/s. This might seem ok 
but the fact is that stats are different for the Intel card.
- Download (server -> router -> laptop) performance with rsync caps at 62.69 
MB/s (megabytes per second).
- This is not a server HDD bottleneck - the destination storage was an SSD.
- A TCP workload (iperf -c ) initiated from the server side 578 Mbits/sec 
to iperf -s on the QCA6174 WNIC side caps at 578 Mbit/s ~ 72 MB/s

This maps well to what you are saying about the longstanding problem
with ath10k & TCP stack.

I will try out the hack to confirm.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[dh]

My observations are mostly just significantly lower signal strength than
another laptop I have with intel wireless during side by side test.  I'm
receiving an intel AC 8265 (Model 8265NGW) in the coming days to do a
comparison in the same chassis for a fair test (in case of antenna
performance issues).

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Kalle Valo]

I'm having a hard time understanding this bug report, so I have some
extra questions:

Is the 27.3 Mbit/s throughput transmit (laptop -> AP) or receive (AP ->
laptop) speed? That's an important detail to know.

Also I see claims that this is a firmware problem, how was that
conclusion made?

If receive throughput is good but transmit throughput is low when it's
most like the longstanding problem ath10k has with Linux TCP stack. To
confirm that there's a hack patch which workarounds the issue:

https://patchwork.kernel.org/patch/5784701/

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[JonAbrah]

Thank AceLan, I gave it a try, but it seems that those files are the
same or older than the ones available on github.com/kvalo/ath10k-
firmware/tree/master/QCA6174 and the poor performance remains.


I also found a bug from 2015 
https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1520343 , which 
seems related to this and affects a lot of other people - that bug was 
originally due to the card not being supported [which has now been fixed], but 
has developed lately with more comments into the random poor performance of the 
card under linux.  Although, the original poster to this bug has provided more 
detailed logs for a potential solution.

I think it's apparent that there's a real problem with the linux-
firmware of QCA6174 and I've personally reached a point where I'm not
sure if it's worth riding it out or to jump OS-ship.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[JonAbrah]

KalleValo, I added you in the hopes for some insight.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[AceLan Kao]

Try to get the firmware from the linux-firmware git tree
   git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
copy the firmwares in ath10k/QCA6174/hw3.0/ to /lib/firmware/
It should help.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[JonAbrah]

I'm also experience abysmal Wi-Fi performance with QCA6174 on a new
Lenovo Yoga 910 - dropping connection every few minutes, reporting very
low network strength coverage.

Out of the box, the card didn't work at all with neither Ubuntu Xenial
LTS nor elementaryOS 0.4 Loki, but I got it running rudimentarily with
the latest hwe-edge kernel 4.10.0.20 and linux-firmware (1.164).  I've
tried upgrading to the latest firmware packages from github.com /kvalo
/ath10k-firmware/tree/master/QCA6174 to fix the poor connection
performance of the network card, but it sadly doesn't seem to have had
any noticeable effect.

I've also disabled the network card power-savings, disabled IPv6, tried
all sorts of tinkering with the router, nothing seems to fix the poor
performance.  A weird quirk I noticed is that if the notebook is
completely still, network connection drops less frequently, but if the
computer is moved by just a bit, then the network connection drops
noticeably.

One problem is that the network indicator doesn't even report that the
connection has been lost/dropped, the only way it's noticed is the long
buffering time it takes suddenly to load websites:  sudo service
network-manager stop/start fixes this temporarily, but this is far from
a solution and very annoying.

What can I do to fix this (apart from using Windows :( )?  Any
recommendations?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

dima@blade:~$ uname -r
4.11.0-041100rc1-generic

dima@blade:~$ dpkg -l linux-firmware
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name  Version 
ArchitectureDescription
+++-=-===-===-===
ii  linux-firmware1.163   
all Firmware for Linux kernel drivers


dima@blade:~$ journalctl -k | grep ath10k
мар 06 20:29:43 blade kernel: ath10k_pci :3b:00.0: enabling device ( -> 
0002)
мар 06 20:29:43 blade kernel: ath10k_pci :3b:00.0: pci irq msi 
oper_irq_mode 2 irq_mode 0 reset_mode 0
мар 06 20:29:44 blade kernel: ath10k_pci :3b:00.0: qca6174 hw3.2 target 
0x0503 chip_id 0x00340aff sub 1a56:1535
мар 06 20:29:44 blade kernel: ath10k_pci :3b:00.0: kconfig debug 0 debugfs 
1 tracing 1 dfs 0 testmode 0
мар 06 20:29:44 blade kernel: ath10k_pci :3b:00.0: firmware ver 
WLAN.RM.2.0-00180-QCARMSWPZ-1 api 4 features wowlan,ignore-otp,no-4addr-pad 
crc32 75dee6c5
мар 06 20:29:44 blade kernel: ath10k_pci :3b:00.0: board_file api 2 bmi_id 
N/A crc32 6fc88fe7
мар 06 20:29:46 blade kernel: ath10k_pci :3b:00.0: htt-ver 3.26 wmi-op 4 
htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
мар 06 20:29:46 blade kernel: ath10k_pci :3b:00.0 wlp59s0: renamed from 
wlan0


-

dima@blade:~⟫ iperf -c rtr

Client connecting to rtr, TCP port 5001
TCP window size: 85.0 KByte (default)

[  3] local 10.10.10.78 port 57506 connected with 10.10.10.1 port 5001
[ ID] Interval   Transfer Bandwidth
[  3]  0.0-10.0 sec  14.5 MBytes  12.1 Mbits/sec


Server-side:

RT-AC87U-F280:/tmp/home/root# iperf -s

Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)

[  4] local 10.10.10.1 port 5001 connected with 10.10.10.78 port 57506
[ ID] Interval   Transfer Bandwidth
[  4]  0.0-10.0 sec  14.5 MBytes  12.1 Mbits/sec


Just to confirm that ath10k changes (if any for 4.11) do not affect this: the 
chip firmware files are still old.

** Attachment added: "dmesg-4.11.0-041100rc1-generic.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+attachment/4832453/+files/dmesg-4.11.0-041100rc1-generic.log

** Tags added: kernel-bug-exists-upstream

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Joseph Salisbury]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc1/


** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Confirmed *NFA364xp.bin and qca61x4_2_2.bin usage by Windows. linux-
firmware's version is definitely not up-to-date for this card as it
refers to NFA324i (see the paste link).

** Attachment added: ".inf file parsed by Windows"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+attachment/4831855/+files/killer-wireless-firmware.png

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

** Description changed:

- I experience a very poor 802.11ac performance of a QCA6174 Wireless card
- (Killer Wireless 1535).
+ Update: added some forensics in the paste (a long read):
+ http://paste.ubuntu.com/24118478/
+ 
+ TL;DR with a bit of intuition:
+ We need a new firmware-5.bin from Qualcomm Atheros for this rev 32 card in 
order to make it work well - if anybody has contacts there it would be nice to 
ask them to upload this to the upstream linux-firmware tree.
+ 
+ 3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless 
Network Adapter (rev 32)
+ qca6174 hw3.2 target 0x0503 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 
+ uname -r
  4.10.0-9-generic
  
  dpkg -l linux-firmware | grep ii
  ii  linux-firmware 1.163all  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- 
SERR- 
- Kernel driver in use: ath10k_pci
- Kernel modules: ath10k_pci
- 
+ 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- 
SERR- 
+ 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 :3b:00.0: enabling device ( 
-> 0002)
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :3b:00.0: Direct firmware load 
for ath10k/pre-cal-pci-:3b:00.0.bin failed with error -2
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :3b:00.0: Direct firmware load 
for ath10k/cal-pci-:3b:00.0.bin failed with error -2
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :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 :3b:00.0: qca6174 hw3.2 target 
0x0503 chip_id 0x00340aff sub 1a56:1535
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :3b:00.0: kconfig debug 0 
debugfs 1 tracing 1 dfs 0 testmode 0
  Mar 04 18:28:31 ubuntu kernel: ath10k_pci :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 :3b:00.0: board_file api 2 
bmi_id N/A crc32 6fc88fe7
  Mar 04 18:28:34 ubuntu kernel: ath10k_pci :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 

[Bug 1670041] Re: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535)

[Dmitrii Shcherbakov]

Just to rule out the case of bad compatibility between the STA on the
router (Quantenna QSR1000 chipset, QT3840BC SoC in case of my RT-87U)
and the client WNIC I also checked with a different STA.

So the second router's 802.11ac hardware is Compex_WLE900VX Qualcomm
Atheros QCA9880 (V2) which uses ath10k driver as well. Therefore, I've
tested laptop's ath10k on 4.10 with router's ath10k on 4.4 kernel:

root@turris:~# uname -r
4.4.39-80079e1c1e5f9ca7ad734044462a761a-4 

root@turris:~# lspci -vvv

02:00.0 Network controller: Qualcomm Atheros QCA986x/988x 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- SERR- https://bugs.launchpad.net/bugs/1670041

Title:
  Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
  1535)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs