Date: Tue, 8 Mar 2016 08:14:09 -0500
From: Bob Copeland <me@bobcopeland.com>
To: Michal Kazior <michal.kazior@tieto.com>
Cc: Dave Taht <dave.taht@gmail.com>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Johannes Berg <johannes@sipsolutions.net>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
	Felix Fietkau <nbd@openwrt.org>,
	Tim Shepard <shep@alum.mit.edu>
Subject: Re: [RFC/RFT] mac80211: implement fq_codel for software queuing
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On Tue, Mar 08, 2016 at 08:12:21AM +0100, Michal Kazior wrote:
> However other drivers (e.g. ath10k) have offloaded rate control on
> device. There's currently no way of doing this calculation. I was
> thinking of drivers exporting tx_rate to mac80211 in some way - either
> via a simple sta->tx_rate scalar that the driver is responsible for
> updating, or a EWMA that driver updates (hopefully) periodically and
> often enough. This should in theory at least allow an estimate how
> much data on average you can fit into given time frame (e.g. txop, or
> hardcoded 1ms).

What about implementing ops->get_expected_throughput?  This would be
useful for mesh (both 11s and batman) as well since they need to
estimate link quality to pick a path.

-- 
Bob Copeland %% http://bobcopeland.com/