I view this as a bug with netperf and it's UDP_RR test. Later, I may look into a patch for that, or see if I can find a workaround for it in netperf-wrapper, but it certainly clouds the results.
Simplest.qos certainly is behaving different from a ping CDF plot, and also is making more progress through the UDP pings before they drop out.
022 - simplest.qos, fq_codel, ecnSwitching to simplest.qos seems to have improved things. UDP pings are lasting longer, and the latencies are better, especially at the "slow" end of things.
023 - simplest.qos, efq_codel, ecn
efq continues to act oddly, ramping up in bandwidth over time (as the UDP flows fall off?)
ECN or no?The other question was what ECN options I have enabled, and how that might be factoring into things.
First, the previous settings, but with ECN disabled in the router on upstream (but still enabled on the client and server hosts...):
021 - simple.qos, fq_codel, no ecn on router upstream
No improvement in UDP ping longevity, no improvement in latency.
020 - simplest.qos, fq_codel, no ecn on router upstream
Better UDP longevity, but the tcp upload results look suspicious.