On Thu, Sep 6, 2018 at 4:13 AM Toke Høiland-Jørgensen <toke@xxxxxxx> wrote: > > Louie Lu <git@xxxxxxxx> writes: > > > Toke Høiland-Jørgensen <toke@xxxxxxx> 於 2018年9月6日 週四 下午5:27寫道： > > > >> Louie Lu <git@xxxxxxxx> writes: > >> > >> > Let user can reset station airtime status by debugfs, it will > >> > reset all airtime deficit to ATH_AIRTIME_QUANTUM and reset rx/tx > >> > airtime accumulate to 0. > >> > >> No objections to the patch, but I'm curious which issues you were > >> debugging that led you to needing it? :) > >> > > I'm testing to get the packet queue time + airtime in > > ath_tx_process_buffer, > > Right; I've been thinking that it would be useful to make the CoDel > enqueue time available to drivers. And minstrel, for that matter > (lowering the number of retries for packets that has queued for a long > time, for instance). Good to hear that others are looking into something > similar :) Yea! Seeing retransmits scale down would be a goodness. Last I looked ath9k was at, like 10?, when it should be, like, 2, at mcs0 and 10 at mcs15. I can't seem to publish a link to this directly, but it's open access if you search via https://scholar.google.com/: "Resolving Bufferbloat in TCP Communication over IEEE 802.11 n WLAN by Reducing MAC Retransmission Limit at Low Data Rate" even their simple bifurcated model worked well. > > > it would be useful if I can reset the station airtime accumulated > > value, so I can observe in each test round (e.g. 5 ping) airtime > > accumulated > > > > Also to reset the deficit to make sure it run like fresh one. > > Yup, makes sense. > > -Toke -- Dave Täht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619
