Dave Täht

I note that I do this sort of tuning for a living, and am between contracts at the moment. Anyway, thank you all for getting into the methods and claims...

The "jitter" you observe on the rrul test is the conflation of two things: sampling error and actual bandwidth usage during the sample interval defined. It is *normal* for it...

I would like a packet capture. And a glass of scotch.

@borkmann I am not sure if we are talking past each other or not? In the 100mbit FIFO case sch->limit (and/or sch_fq) should be knocked way down, not up. 100...

@tohojo the results so far are from the rrul test which on a packet limit floods the queue with short acks and starves the data path somewhat while taking 1/15th...

Any progress here? 15ms is really miserable. It should be not much more than 250us at 100mbit. See also: https://blog.tohojo.dk/2023/12/the-big-fifo-in-the-cloud.html

I would be tickled if you tried cake instead, and enabled ecn sender side. tc qdisc add the_interface bandwidth 100Mbit rtt 5ms with host routing you can add ecn support...

In the hope this might spawn a little out of the box thinking on this bug: https://www.youtube.com/watch?v=rWnb543Sdk8&t=2603s

I am trying to start writing more stuff again. However my first goal was to somehow upgrade to a current hugo....

I would like us to better observe actual DSCP mark usage in the wild, and whether or not they help.