I did some more testing. Same setup as before, I varied the amount of delay:
server -- delay -- mbox -- client
netserver Xms/Xms 45/900mbit
Cake config:
qdisc cake 801b: dev mbox.l root refcnt 2 bandwidth 45Mbit diffserv3 triple-isolate ack-filter-aggressive rtt 100.0ms noatm overhead 38 via-ethernet mpu 84
qdisc cake 801c: dev mbox.r root refcnt 2 bandwidth 900Mbit diffserv3 triple-isolate rtt 100.0ms noatm overhead 38 via-ethernet mpu 84
Results:
I will repeat these with ack-filter instead of ack-filter-aggressive.
George