Throughput drop with ath10k latest driver and firmware-5.bin_10.2.4.70.66

[Ben Greear]

On 10/27/2017 01:25 AM, KAVITA MATHUR wrote:
> On Thu, 26 Oct 2017 07:48:18 -0700, Ben Greear wrote
>> On 10/26/2017 04:20 AM, KAVITA MATHUR wrote:
>>> Hi,
>>>
>>> In my AP , there are two radios, one ath9k based module WLE200NX and second ath10k based
>>> WLE600VX.
>>>
>>> I configured both the radios as AP in IEEE 802.11a 40 MHz HT mode and performed
>>> throughput test.
>>>
>>> Measured throughput with ath9k is 164Mbps while with ath10k it is 137Mbps. I could not
>>> understand the reason of this drop(27 Mbps)?
>>>
>>> My test setup was inside RF-Shield. There was no interference and system was associated
>>> at 300Mbps in both cases.
>>>
>>> ath10k driver was taken from ath10k git and firmware version is
>>> firmware-5.bin_10.2.4.70.66.
>>> ath9k drives was taken from stable backport release backport-4.4.2-1.
>>>
>>> kernel version : 3.12
>>> openwrt version : Chaos Calmer 15.05.0
>>>
>>> Please suggest me how can I increase the throughput of my AP.
>>
>> Does it work any better with different firmware/software, or is ath10k just
>> always slower for you?
>
> Yes. Measured throughput in the same configuration was 193 Mbps when used ath10k driver
> from backport stable release backport-4.4.2-1 and firmware version
> firmware-5.bin_10.2.4.70.63-2. But this version is not stable for ac mode and it does
> not support MESH. Please suggest appropriate ath10k driver version and firmware.

I would try just changing the firmware and see if it is the firmware or the
driver change that causes decreased performance.

>
>>
>> How much attenuation are you using?
> Received Signal strength is -38 dBm and tx power is 5dBm in all these testcases.

That would seem to be a good RSSI, so attenuation is probably not the issue.

Thanks,
Ben


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