Toke Høiland-Jørgensen wrote: > This reworks the ath9k driver to schedule transmissions to connected > stations in a way that enforces airtime fairness between them. It > accomplishes this by measuring the time spent transmitting to or > receiving from a station at TX and RX completion, and accounting this to > a per-station, per-QoS level airtime deficit. Then, an FQ-CoDel based > deficit scheduler is employed at packet dequeue time, to control which > station gets the next transmission opportunity. > > Airtime fairness can significantly improve the efficiency of the network > when station rates vary. The following throughput values are from a > simple three-station test scenario, where two stations operate at the > highest HT20 rate, and one station at the lowest, and the scheduler is > employed at the access point: > > Before / After > Fast station 1: 19.17 / 25.09 Mbps > Fast station 2: 19.83 / 25.21 Mbps > Slow station: 2.58 / 1.77 Mbps > Total: 41.58 / 52.07 Mbps > > The benefit of airtime fairness goes up the more stations are present. > In a 30-station test with one station artificially limited to 1 Mbps, > we have seen aggregate throughput go from 2.14 to 17.76 Mbps. > > Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxx> Patch applied to ath-next branch of ath.git, thanks. 63fefa050477 ath9k: Introduce airtime fairness scheduling between stations -- https://patchwork.kernel.org/patch/9449275/ Documentation about submitting wireless patches and checking status from patchwork: https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
