Please search the email logs.
There is a detailed discussion regarding this of me and Adrian.
You will find code snippets also, if the pastebin has not expired !

In the first cut, you are *partly* right.

-
Abhinav Narain

On Tue, Dec 4, 2012 at 3:44 PM, Kamran Nishat <[email protected]>wrote:

> Dear
> I want to estimate the timestamp when an AMPDU start TX on air and when it
> got completed.
> This is my plan:
>
> ts_tstamp field of ath_tx_status have time for completion of the TX of the
> AMPDU, but which function is first called after an AMPDU transmission.
> Duration of an AMPDU can be calculated with ath9k_hw_computetxtime(). So if
> I subtract this duration from ts_tsramp it will give me TX starting time.
>
> Please comment on this am I right or not.
>
> Regards,
> Kamran Nishat
>
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