Problem with iw set bitrate in ath10k

[Michal Kazior]

On 22 June 2015 at 19:08, Ilias Syrigos <ilias013 at gmail.com> wrote:
> 2015-06-22 8:19 GMT+03:00 Michal Kazior <michal.kazior at tieto.com>:
>> On 20 June 2015 at 00:01, Ilias Syrigos <ilias013 at gmail.com> wrote:
>>> Hello,
>>>
>>> I'm trying to fix the bitrate with the iw set bitrates command.
>>>
>>> More specifically, I want to use single stream rates (nss=1) and let
>>> the driver choose the mcs. So, I use:
>>>
>>> iw wlan0 set bitrates legacy-5 ht-mcs-5 vht-mcs-5 1:0-9
>>>
>>> With this setting I observe successful transmissions with nss=2 and
>>> rate_index=9, through monitor mode at the receiving node, and iperf
>>> throughput of 300 Mbps.
>>>
>>> Why is nss not fixed to 1?
>>
>> That's interesting. Are you associated in VHT or HT mode? Can you get
>> some logs, please? [1] (traces preferred)
>>
>> [1]: https://wireless.wiki.kernel.org/en/users/drivers/ath10k/debug
>>
>> Generally firmware rate-control is really picky when it comes to
>> configuration. I recall I had observed some quirkiness when I was
>> working on extending the set_bitrate_mask callback.
>>
> Hi Michal,
>
> I'm associated in VHT mode.
> I also attach the trace.dat file from the trace-cmd.

The trace file is empty - it has 0 log entries.. Did you follow
instructions from the wiki?


Michał