Making WiFi fast

Posted Nov 9, 2016 18:04 UTC (Wed) by zlynx (guest, #2285)
In reply to: Making WiFi fast by sourcejedi
Parent article: Making WiFi fast

I think you'd want to test quite a bit before trying for airtime fairness. I think the interaction of codel with the two frame limit will result in fairness even with round-robin. Because the slow devices will be getting a much more limited packet queue in software, because they take longer to transmit, the faster devices will have more packets in queue.

I am *guessing* that devices will get airtime fairness "for free."

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Making WiFi fast

Posted Nov 10, 2016 2:46 UTC (Thu) by mtaht (guest, #11087) [Link] (1 responses)

while we are working on various modifications to fq_codel to make it more robust across a wide range of rates and numbers of stations, the airtime fairness patches we have currently do indeed behave better than what we call the fq-mac version without an explicit modification to codel.

I certainly welcome more testers (see the links to patches I posted earlier), ideas, and data. In addition to the data on the slides there, we have a large paper on the airtime fairness stuff pending academic review, which I can provide privately if you would like to see it.

Making WiFi fast

Posted Sep 6, 2019 21:58 UTC (Fri) by mtaht (guest, #11087) [Link]

That paper was ultimately published as "Ending the anomaly" - the capstone to solving a 16+ year old problem in wifi that nobody, until us - had figured out how to solve.

https://www.usenix.org/system/files/conference/atc17/atc1...