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From: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>
To: Adrian Chadd <adrian@freebsd.org>
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Date: Tue, 07 Jun 2016 10:58:04 +0200
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 (Adrian Chadd's message of "Mon, 6 Jun 2016 17:01:08 -0700")
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Subject: Re: [Make-wifi-fast] [RFC/RFT 5/5] ath9k: Count RX airtime in
	airtime deficit
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Adrian Chadd <adrian@freebsd.org> writes:

> [snip]
>
> I also found one of my notes in my version of this - how can we
> estimate the duration of an A-MPDU, when we only get hardware
> de-encapsulated frames?

Well in my case I'm sidestepping this by getting the TX duration from a
register in the hardware. There seems to be registers containing the
duration spent on each step in the retry chain; I simply sum these.

-Toke