Re: [PATCH v2] ath10k: fix different tx duration output

["Toke Høiland-Jørgensen" <toke@redhat.com>]

leiwa@codeaurora.org writes:

> On 2019-04-17 17:26, Toke Høiland-Jørgensen wrote:
>> Lei Wang <leiwa@codeaurora.org> writes:
>> 
>>> TX duration output of tx_stats in debugfs and station dump had big
>>> difference because they got tx duration value from different statistic
>>> data. We should use the same statistic data.
>> 
>> So are you sure you picked the most accurate one of the two? :)
>> 
>> -Toke
>
> Hi Toke,
>
> Yes.
> Now for ath10k, there are two ways to get tx duration output.
> One is got from tx_stats in debugfs reported by firmware. It is a total 
> value including all the frames which created by host and firmware sent 
> to the peer.
> And the second is calculated from 
> ath10k_htt_rx_tx_compl_ind()-->ieee80211_sta_register_airtime(), here 
> the tx duration just includes the data frames sent from host to the 
> peer.

So the difference is that the former includes control frames as well? Is
that the only difference? And what exactly is a "big difference" (from
the commit message)?

> So the first value is preferable for station dump.

Hmm, I'm not sure if I agree with this. I specifically added the
tx_duration to the station dump to be able to get the values used by the
airtime scheduler. This breaks with this patch.

-Toke