Chenchong's work on net80211_ratectl

[Adrian Chadd]

Hi!

Great!

So what's the problem with complete? Linux just provides all the
information that the NIC supplies - how many attempts were made, how
many attempts failed, which rate suceeded, etc. It looks a lot like it
was designed around the requirements for the atheros driver (that has
the most interesting information available) and other NICs just have
to fake it somehow.



-adrian

On 5 August 2013 08:58, Chenchong Qin <qinchenchong at gmail.com> wrote:
> Hi!
>
> Here is my work done these days on porting ath_rate_sample to net80211. It
> has not been finished yet. _complete_ and _update_ are to be added.
>
> _complete_ is really a tricky thing. We have to provide rc algos with rc
> information
> during the frame completion period. Different rc algos may need different rc
> information. What makes things more thornier is that different drivers
> provide
> different rc information in different ways. So, it seems we need a unified
> way to
> provide the rc information during completion of a frame.
>
> I'm browsing mac80211 these days to see what Linux do about _complete_. And,
> looking forward to your commets!
>
> Thanks!
>
> Chenchong
>
>
> On Sat, Aug 3, 2013 at 1:30 AM, Adrian Chadd <adrian at freebsd.org> wrote:
>>
>> Well just remember you can always ask me/us questions!
>>
>> What's your latest diff against -HEAD? Maybe I can start looking at
>> including parts of it in the tree.
>>
>>
>>
>>
>> -adrian
>>
>> On 2 August 2013 09:17, Chenchong Qin <qinchenchong at gmail.com> wrote:
>> > Hi!
>> >
>> > These days, I'm taking a further look at what Linux done for the
>> > _completion_ of a
>> > frame. Some updates will be posted here later.
>> >
>> > And, with ir_rates, we can return/fill an rc array rather than just
>> > returning the rix.
>> >
>> > Thanks!
>> >
>> > Chenchong
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Aug 1, 2013 at 12:21 AM, Adrian Chadd <adrian at freebsd.org>
>> > wrote:
>> >>
>> >> Boo!
>> >>
>> >> Do you have another update?
>> >>
>> >>
>> >>
>> >> -adrian
>> >>
>> >> On 24 July 2013 06:44, Adrian Chadd <adrian at freebsd.org> wrote:
>> >> > On 24 July 2013 06:38, Chenchong Qin <qinchenchong at gmail.com> wrote:
>> >> >>
>> >> >> My pleasure!
>> >> >>
>> >> >> It's also against HEAD.
>> >> >>
>> >> >> Thanks!
>> >> >
>> >> > Ok. This is looking great!
>> >> >
>> >> > Next - we need to update the rate control API to now populate an rc
>> >> > array rather than just returning the rix.
>> >> >
>> >> > This is the tricky part - as we're going to have to modify all the
>> >> > drivers that use the rate control API to use this.
>> >> > Which is fine, as there's only a handful. It's just annoying.
>> >> >
>> >> > Then we have to provide the rate control information during frame
>> >> > _completion_, so the rate control code knows which transmission rates
>> >> > succeeded or failed. I'm still not sure what to do about it here.
>> >> > Maybe do something like Linux and attach TX rate control and
>> >> > completion information as an mbuf tag?
>> >> >
>> >> > _Then_ we can start doing interesting thing with it. :)
>> >> >
>> >> >
>> >> >
>> >> > -adrian
>> >
>> >
>
>