Issue with ATH10K driver with 802.11 a/g mode datarates

[Ben Greear]

You normally need to add 30-60 db of attenuation to get best throughput
when directly cabling with SMA cables.  Please try adding more attenuation.

What firmware are you using on the T1024RDB?  Maybe also try using a different
firmware version to see if that helps.

Thanks,
Ben


On 09/20/2016 01:04 AM, Sridhar Konabathini wrote:
> Hi,
>     Yes, we are doing the testing in an isolation chamber (no attenuators used), antennas
> are connected to RF card via SMA cable. Tx power is 5dBm. we are not suspecting Lanforge
> as it gives required throughput in different WiFi setup.
>    here Device Under test is T2014 based card.
>
> Regards,
> Sridhar
>
> On Mon, 19 Sep 2016 21:33:03 -0700, Ben Greear wrote
>> LANforge is going to be running a modified driver and firmware, though likely
>> it is no worse at performance in this case than stock code.
>>
>> What is the device under test?
>>
>> And, are you in an isolation chamber, using SMA cables, attenuation, etc?
>>
>> There are lots of things that can impact wifi throughput so you have to provide
>> lots more details in order for anyone to understand why the throughput might be
>> less than expected.
>>
>> And if it is specific to LANforge, please send email to support at candelatech.com
>>
>> Thanks,
>> Ben
>>
>> On 09/19/2016 08:46 PM, Sridhar Konabathini wrote:
>>> Hi,
>>>       I didnt try with ath9k drivers on the same setup.
>>>
>>>       we are using  WiFi capacity test tool on Lanforge to test the performance, this
> will
>>> generate the traffic. we are selecting the UDP protocol (packet - 1472 Bytes).
>>>
>>>       As per TEC spec. required data rates are given below.
>>>
>>>       Mode         Asso. rate         Throughput
>>>
>>> 802.11a            54 Mbps             28 Mbps
>>>
>>> 802.11g            54 Mbps             28 Mbps
>>>
>>>       But we are getting only 26-27Mbps, how to improve this throughput ?
>>>
>>>       [TEC(Telecommunication Engineering Centre, Govt. India) is a technical body,
>>> prepares specification of common Telecom standards.]
>>>
>>> Regards,
>>> Sridhar
>>>
>>>
>>> On Mon, 19 Sep 2016 10:22:26 -0700, Adrian Chadd wrote
>>>> .... and what's "TEC specification" ?
>>>>
>>>> -
>>>> a
>>>>
>>>> On 19 September 2016 at 09:28, Ben Greear <greearb at candelatech.com> wrote:
>>>>> Out of curiosity, does ath9k perform at the required rates in a similar
>>>>> setup?
>>>>>
>>>>> Sending tcp, udp, or some other protocol?  How are you generating the
>>>>> traffic?
>>>>>
>>>>> Thanks,
>>>>> Ben
>>>>>
>>>>>
>>>>> On 09/18/2016 09:26 PM, Sridhar Kondabathini wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>        When we are testing 802.11 a/g mode throughput measurements on
>>>>>> T1024RDB ( we used
>>>>>> kernel-3.12; ath10k drivers backported from 4.4;hostapd 2.5 for 11AC
>>>>>> support), then we
>>>>>> are getting 26-27 Mbps , which is not meeting the required TEC
>>>>>> specification (which is
>>>>>> ~28 Mbps). How can we increase the throughput in these modes.
>>>>>>
>>>>>>         Can you please help on this.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Sridhar Kondabathini,
>>>>>> Research engineer,
>>>>>> PSG lab,
>>>>>> Center for Development Of Telematics
>>>>>> 9480484821.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Disclaimer:
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>>>>>> This email and any files transmitted with it are confidential and intended
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>>>>>> are not the
>>>>>> intended recipient you are notified that disclosing, copying, distributing
>>>>>> or taking
>>>>>> any
>>>>>> action in reliance on the contents of this information is strictly
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>>>>>> sender does not a
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> ath10k mailing list
>>>>>> ath10k at lists.infradead.org
>>>>>> http://lists.infradead.org/mailman/listinfo/ath10k
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Ben Greear <greearb at candelatech.com>
>>>>> Candela Technologies Inc  http://www.candelatech.com
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> ath10k mailing list
>>>>> ath10k at lists.infradead.org
>>>>> http://lists.infradead.org/mailman/listinfo/ath10k
>>>>
>>>> _______________________________________________
>>>> ath10k mailing list
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>>>> http://lists.infradead.org/mailman/listinfo/ath10k
>>>
>>>
>>> Regards,
>>>
>>> Sridhar Kondabathini,
>>> Research engineer,
>>> PSG lab,
>>> Center for Development Of Telematics
>>> 9480484821.
>>>
>>>
>>>
>>>
>>> Disclaimer:
>>> ----------
>>> This email and any files transmitted with it are confidential and intended solely
>>> for
>>> the use of the individual or entity to whom they are addressed.  If you are not the
>>> intended recipient you are notified that disclosing, copying, distributing or taking
>>> any
>>> action in reliance on the contents of this information is strictly prohibited. The
>>> sender does not a
>>>
>>
>> --
>> Ben Greear <greearb at candelatech.com>
>> Candela Technologies Inc  http://www.candelatech.com
>>
>> _______________________________________________
>> ath10k mailing list
>> ath10k at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/ath10k
>
>
> Regards,
>
> Sridhar Kondabathini,
> Research engineer,
> PSG lab,
> Center for Development Of Telematics
> 9480484821.
>
>
>
>
> Disclaimer:
> ----------
> This email and any files transmitted with it are confidential and intended solely
> for
> the use of the individual or entity to whom they are addressed.  If you are not the
> intended recipient you are notified that disclosing, copying, distributing or taking
> any
> action in reliance on the contents of this information is strictly prohibited. The
> sender does not a
>

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com