Thanks Ben, Michal for your help.
It turns out that the "reno" thing fixed the issue.
We still do not know why it didn't work the first time but after some
debbuging, but no config changes, it just started working.
We are now on 200 Mbps TCP on 80 MHz which makes sense.
Thanks again. Bests,
Iñaki
On 22/04/16 18:57, Ben Greear wrote:
On 04/22/2016 09:44 AM, Iñaki Pascual wrote:
Thanks for your help Ben.
I think we will go for kernel 4.4 and the latest firmware relase.
Regarding the firmware, should we try the CT-10.2 or it is not stable
enough?
My 10.2 has not had much testing, and in recent testing, it does not
perform as well as my 10.1
firmware. But, you could give it a try to see how well it works....
4.4 seems to be working this morning, but was broken yesterday: It is
in fairly heavy development, so possibly you will
hit regressions there. Let me know if you do. It also has a bunch of
upstream testing ath10k patches, and I saw other reports
that TCP throughput is less with them applied, though possibly this is
only true if you are using codel tx queueing.
Thanks,
Ben
Bests,
Iñaki
On 22/04/16 18:16, Ben Greear wrote:
On 04/22/2016 09:11 AM, Iñaki Pascual wrote:
We are using kernel 4.2 with CandelaTech firmware
10.1.467-ct-com-full-014-96d543
Maybe try rls 15 or beta-16 CT 10.1 firmware?
And, we found too much instability in 4.2 kernel. We suggest 4.0 or
4.4,
though I am not aware of any throughput related bugs aside from the
CUBIC
congestion control issue.
You might also try our 3.17 kernel since CUBIC worked in that kernel...
Thanks,
Ben
monet@sc227:~$ ethtool -i wlan2
driver: ath10k_pci
version: 4.2.0+
firmware-version: 10.1.467-ct-com-full-014-96d543
bus-info: 0000:0b:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
Thanks,
Iñaki
On 22/04/16 18:06, Ben Greear wrote:
On 04/22/2016 09:02 AM, Iñaki Pascual wrote:
Thanks for the tip Ben. We have moved to 'reno' and tried several
window sizes but we are still on max. 35 Mbps which is too low.
What firmware and kernel are you using?
Thanks,
Ben
Bests,
Iñaki
On 22/04/16 17:40, Ben Greear wrote:
Use 'reno' instead of cubic TCP congestion control, cubic is
broken with ath10k.
Thanks,
Ben
On 04/22/2016 08:32 AM, Iñaki Pascual wrote:
Hi everyone,
we have configured two boxes with 802.11ac NICs to work in
channel 48 (5240 MHz), ad-hoc mode, 80MHz channel width.
For UDP traffic we get 300 Mbps bandwith but for TCP we are
around 30 Mbps.
We have tried other channels with similar results.
Throughput for 20 and 40 MHz channel width are ok (20MHz: TCP
21Mbps, UDP 27Mbps, 40MHz: TCP 82Mbps, UDP 144Mbps).
Testing with iperf we have also tried different congestion
windows with no or low improvements.
Below are config details and the sequence of commands we are
using to configure the interface.
Any ideas on what we may be doing wrong?
Bests,
Iñaki
iw outputs:
root@sc227:/home/monet# iw wlan2 info
Interface wlan2
ifindex 6
wdev 0x200000001
addr 04:f0:21:18:26:a2
ssid SC226SC227
type IBSS
wiphy 2
channel 48 (5240 MHz), width: 80 MHz, center1: 5210 MHz
root@sc227:/home/monet# iw wlan2 station dump
Station 04:f0:21:18:26:a8 (on wlan2)
inactive time: 86 ms
rx bytes: 467732521
rx packets: 364249
tx bytes: 1394558
tx packets: 16200
tx retries: 0
tx failed: 0
signal: -51 dBm
signal avg: -51 dBm
tx bitrate: 351.0 MBit/s VHT-MCS 4 80MHz VHT-NSS 2
rx bitrate: 526.5 MBit/s VHT-MCS 4 80MHz VHT-NSS 3
authorized: yes
authenticated: yes
preamble: long
WMM/WME: yes
MFP: no
TDLS peer: no
connected time: 3169 seconds
config commands:
ifconfig wlan2 down
iw wlan2 set type ibss
ifconfig wlan2 up
ifconfig wlan2 10.2.1.7 netmask 255.255.255.0
iw wlan2 ibss join SC226SC227 5240 80MHz
iperf:
root@sc227:/home/monet# iperf -c 10.2.1.6
------------------------------------------------------------
Client connecting to 10.2.1.6, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.2.1.7 port 48548 connected with 10.2.1.6 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 33.1 MBytes 27.7 Mbits/sec
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