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Re: [PATCH] ath9k: switch to rate table based lookup

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Kalle Valo <kvalo@xxxxxxxxxxxxxx> writes:

> Jonas Jelonek <jelonek.jonas@xxxxxxxxx> writes:
>
>>> And how did you test this? Are both PCI and USB devices affected?
>>
>> I tested this on a 8devices Rambutan with QCA9558 SoC, but didn‘t
>> explicitly test this with a USB device. I am not sure whether the
>> ath9k_htc is affected. First I tested this without the patch to get a
>> reference for comparison. I connected three devices via WiFi 2.4GHz
>> and 5GHz, generated traffic multiple times with iperf3 and captured
>> the rc_stats for each station. Then I applied the patch and did the
>> same again. The throughput was overall the same like without the
>> patch, compared to the first run of each station. Rate selection
>> worked fine, the stats were nearly identical, same rates selected in
>> both runs.
>
> Thanks. Can someone review this from ath9k_htc point of view?

Pretty sure ath9k_htc devices do rate control in the firmware. Certainly
ath9k_htc sets the HAS_RATE_CONTROL flag in mac80211, and the only calls
to ath_set_rates are from within xmit.c, which is not used by ath9k_htc.
So I think we're fine as far as that is concerned...

-Toke





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