[Make-wifi-fast] [PATCH RFC/RFT 4/4] mac80211: Apply Airtime-based Queue Limit (AQL) on packet dequeue
toke at redhat.com
Tue Oct 1 02:57:53 EDT 2019
Kan Yan <kyan at google.com> writes:
>> I guess the risk is lower when with a 24ms per-iface limit; but with
>> enough stations I guess it could still happen, no? So we should probably
>> handle this case...
> Each txq (per sta, per tid) is allowed to release at least the lower
> AQL limit amount of packet (default 4ms), which is not affected by
> other station's PS behavior and 4ms should be sufficient for most use
Ah, I thought you'd meant each station can queue MIN(4ms, 24ms-<other
stations>). I see that is not the case; it's up to 10ms as long as the
total is less than 20ms, and up to 4ms otherwise.
> The 24ms per-interface limit is an optimization to get good benchmark
> score in peak performance test, which usually only involve 1-2
Gotta get those benchmark numbers in ;)
> The higher limit probably won't matter anymore when there are many
> stations. I haven't noticed side effects due to PS behavior in the
> ChromiumOS version. Still, it is better to be able to take frames in
> PS queue in to account,
As long as one station always gets its 4ms, I'm not too worried about
PS; but that was not the case in my patch :)
>> Cool. Are you going to submit a ported version of your implementation?
>> Then we can work from the two submissions and see if we can't converge
>> on something...
> Working on porting, should have something ready before the end of this
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