Fwd: Throughput is very low

[Mamun Abu-Tair]

Sorry forget to CC the ath10k mailing list
Begin forwarded message:

> From: Mamun Abu-Tair <ma86 at st-andrews.ac.uk>
> Subject: Re: Throughput is very low
> Date: 17 July 2014 12:21:27 BST
> To: Bart.Jooris at intec.ugent.be
> 
> Dear Bart, 
> Many thanks for your reply. 
> 
> On 16 Jul 2014, at 17:01, Bart Jooris <Bart.Jooris at intec.ugent.be> wrote:
> 
>> Dear Mamum,
>> 
>> On 07/09/2014 04:22 PM, Mamun Abu-Tair wrote:
>>> Dear all,
>>> I am trying to do throughput test with copmex AC cards Model (WLE900VX 7AA) .,using hostapd running on the server and  one client.
>> I have some cards with the same label. Hostapd on the server, on the station we use wpa_supplicant.
> 
> which version of hostapd you are using ?
> 
> 
>>> 
>>> I used Kalle sitting for the hostapd. However, the maximum throughput i can get is around 70Mbit/s which is far away from the throughput achieved by many users (UDP traffic).
>> In a setup with those cards we can observe a UDP throughput of approx. 640Mbps.
>> 
>>> 
>>> I have notice that Bit Rate keeps fixed 6 Mb/s . and it dose not responding to any commands to change it.
>> While running iperf client on the station I can also retrieve the Tx bitrate of 6Mbps with both iwconfig and 'iw wlanX station dump'. Version of iw has some impact on the output too, I have version 3.15.  I don't know a tool which shows the right info on the transmitting node...
>> But a third node which is configured as a sniffer shows Tx bitrate of 1299.99Mbps :-)
>> 
>>> 
>>> The machines used:
>>> Ubuntu 12.04, Kerenl 3.16 , updated regulatory to cover 80Mhz channels , and the latest  firmware
>> Our nodes are also running 12.04 but still with the default kernel 3.11.0-15-generic.
>> dmesg | grep qca98 shows
>> [    4.594975] ath10k: qca988x hw2.0 (0x4100016c) fw 10.1.467.2-1 api 2 htt 2.1
> mine show as follow 
> 
> [   13.846597] ath10k: firmware 10.1.467.2-1 booted
> [   13.856533] ath10k: htt target version 2.1
> 
> Dose this make any difference ?!!! 
> 
> kind regards 
> Mamun
> 
> 
>> Further, as Kalle suggested, we in=stalled the ath10k driver from backports-3.15.1-1.
>> 
>> Best regards,
>> 
>> Bart
>> 
>> -- 
>> Bart Jooris
>> Department of Information Technology
>> Internet Based Communication Networks and Services (IBCN)
>> Ghent University - iMinds
>> Gaston Crommenlaan 8 (Bus 201), B-9050 Gent, Belgium
>> E-mail: bart.jooris at intec.UGent.be
>> M: +32 474 59 53 42
>> Tel. +32 9 33 14900
>> Fax +32 9 33 14899
>> 
>