Re: [Make-wifi-fast] net-next is next

[Dave Taht <dave.taht@gmail.com>]

OK, so the only thing I don't have a full grip on is what the
napi-for-ath10k change did.

On Sat, Oct 1, 2016 at 11:09 AM, Toke Høiland-Jørgensen <toke@toke.dk> wrote:
> Dave Taht <dave.taht@gmail.com> writes:
>
>> I'm a little vague on the pieces missing as yet. I think?, still out
>> of tree are:
>
> Don't see anything missing from the list that I have been working on. Of
> the things I have:
>
>> * Hooking up the ath9k to the intermediate queues code
>
> I expect Kalle to add this sometime during the upcoming merge window
> (which opens tomorrow, according to the PHB crystal ball:
> http://phb-crystal-ball.org/).
>
>> * airtime fairness for the ath9k
>
> Haven't submitted a new version of this since the other things went in.

Patches somewhere?

> While the basic scheduler works well, there are still some things to
> work out before making a serious attempt at upstreaming it (most notably
> the interaction with the hardware QoS queues).

I was more or less planning to ignore that. Nobody else bothers to
test flooding the hardware queues, why should we? :/ And the behavior
is better now, regardless. Can't we ignore it? :-P

>Also, moving parts of the
> code into mac80211 would make it easier to re-use in other drivers. Not
> sure which parts, though.

same here. Pursuing another chipset (like the mt76 or "c.h.i.p") might
lend insight. Sigh.

>> * Codel "hack" for low rates
>
> This still needs to be solved, but the hack I posted previously was just
> that: A hack. I think a different approach is needed.

I outlined a couple approaches in my previous (overlong, meandering)
blog entry ( http://blog.cerowrt.org/post/a_bit_about_bbr/ ) -
notably, "giving up" - and turning off codel at a decent sized
aggregate for the station, rather than at the global limit of one
packet.

And there were a few much easier things from layering on top of the
airtime fairness stuff that might make the impact of multiple stations
on codel less difficult - reducing the txop and reducing the
advertised txop - when highly contended.

Assembling enough pieces to tackle and test those approaches at slow,
middle, and fast rates... would be good, and hopefully I've got a grip
on which pieces, now, thx.

>
>> As for what's in lede.... ?
>
> LEDE has the previous version of the mac80211 fix and the ath9k patch to
> enable the TXQ.

That's lede, not lede-staging?

>
> -Toke



-- 
Dave Täht
Let's go make home routers and wifi faster! With better software!
http://blog.cerowrt.org