[FS#300] ZBT-WG3526 - WIFI 2,4Ghz - throughput is very poor

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - camel (camel) 

Attached to Project - LEDE Project
Summary - ZBT-WG3526 - WIFI 2,4Ghz - throughput is very poor
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - easy to reproduce within 1-2 minute:
1.) install trunk
2.) install iperf
3.) activate wifi and use 2,4Ghz on client connection (default config, also the same with different wifi settings)
4. generate traffic with "iperf" and  you will get kernel/driver crash within 1-2 minute
(server): iperf -s -i 1 -w 6M
(client): iperf -c 192.168.1.19 -i 1 -w 6M -l 2M

on openwrt it shows for this client:
130.0 Mbit/s, 20MHz, MCS 15
117.0 Mbit/s, 20MHz, MCS 14

on openwrt interface it shows: Channel: 6 (2.437 GHz) | Bitrate: 130 Mbit/s

client to server:
------------------
C:\Users\Camel>iperf -c 192.168.1.1 -i 1 -w 6M -l 2M
------------------------------------------------------------
Client connecting to 192.168.1.1, TCP port 5001
TCP window size: 6.00 MByte
------------------------------------------------------------
[  3] local 192.168.1.196 port 15896 connected with 192.168.1.1 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec  14.0 MBytes   117 Mbits/sec
[  3]  1.0- 2.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  2.0- 3.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  3.0- 4.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  4.0- 5.0 sec  6.00 MBytes  50.3 Mbits/sec
[  3]  5.0- 6.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  6.0- 7.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  7.0- 8.0 sec  10.0 MBytes  83.9 Mbits/sec
[  3]  8.0- 9.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  9.0-10.0 sec  8.00 MBytes  67.1 Mbits/sec
[  3]  0.0-10.4 sec  86.0 MBytes  69.4 Mbits/sec

server to client:
-----------------
root at lede:~# iperf -c 192.168.1.196 -i 1 -w 6M -l 2M
------------------------------------------------------------
Client connecting to 192.168.1.196, TCP port 5001
TCP window size:  320 KByte (WARNING: requested 6.00 MByte)
------------------------------------------------------------
[  3] local 192.168.1.1 port 47592 connected with 192.168.1.196 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec  2.21 MBytes  18.6 Mbits/sec
[  3]  1.0- 2.0 sec   700 KBytes  5.73 Mbits/sec
[  3]  2.0- 3.0 sec  1.37 MBytes  11.5 Mbits/sec
[  3]  3.0- 4.0 sec   891 KBytes  7.30 Mbits/sec
[  3]  4.0- 5.0 sec  1.18 MBytes  9.90 Mbits/sec
[  3]  5.0- 6.0 sec  1.43 MBytes  12.0 Mbits/sec
[  3]  6.0- 7.0 sec   891 KBytes  7.30 Mbits/sec
[  3]  7.0- 8.0 sec  1.68 MBytes  14.1 Mbits/sec
[  3]  8.0- 9.0 sec  2.42 MBytes  20.3 Mbits/sec
[  3]  9.0-10.0 sec  2.49 MBytes  20.9 Mbits/sec
[  3]  0.0-10.1 sec  15.2 MBytes  12.6 Mbits/sec
root at lede:~#

System
Hostname	lede
Model	ZBT-WG3526
Firmware Version	LEDE Reboot r0+2292 / LuCI Master (git-16.324.51057-1c27f6b) from 22.11.2016
Kernel Version	4.4.32
lede-ramips-mt7621-zbt-wg3526-squashfs-sysupgra..> 22-Nov-2016 12:56             3932323
   

 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=300