[Make-wifi-fast] [PATCH v8 0/2] Implement Airtime-based Queue Limit (AQL)

Toke Høiland-Jørgensen toke at redhat.com
Wed Nov 20 05:14:08 EST 2019

Kan Yan <kyan at google.com> writes:

>> Those were lovely, thanks!!!! Big win. Since you are on patch v10
>> now.... Any chance you could turn ecn on and off and give it a go
>> again in your next test run?
>> Also:
>> --step-size=.04 --socket-stats # the first is helpful to gain more
>> detail, the second as to the behavior of the tcp stack.
> Thanks for the feedback! I will do more tests in a few days.
>> Secondly - and AFTER this patchset stablizes, I'd like us to look into
>> returning the codel default to 10ms or less
>> from it's currently 20ms or worse setting. Tis another easy test
> Smaller CoDel "target" doesn't work well with wireless because the
> dequeue behavior in wireless driver is very bursty. It is quite often
> dequeues dozens of packets in one burst after one large aggregation is
> completed, so smaller CoDel "target" can cause unnecessary packet
> drop.

It would be interesting to get some samples of the actual sojourn time
as seen by CoDel in mac80211. Might be doable with bpftrace...


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