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.
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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