Mikael Abrahamsson <[email protected]> writes: > Hi, > > I've been running openwrt 18.06.2 for a long time on my WRT1200AC, with > CAKE, and everything has been great. I always got A+ in dslreports for > bufferbloat. I have a 250/100 ETTH connection (IP over ethernet native, no > PPPoE, no PON). > > I noticed some intermittent network stuttering issues I wanted to diagnose > last week, so I started looking into this. When doing the test I get > +100ms spikes in the downstream direction when I run CAKE. If I instead > switch to FQ_CODEL I do not see these spikes. As a matter of fact, if I > set my downstream to 300 when running cake and let my ISP handle the > buffering then I get an average of 5-10ms worth of buffering with no > spikes. My ISP isn't bloated in that direction.
Hmm, this seems like it's an issue with the timers CAKE uses for shaping. Not really sure why that would happen... > # tc qdisc show dev eth1.2 > qdisc cake 801f: root refcnt 2 bandwidth 100Mbit diffserv3 triple-isolate > nonat nowash no-ack-filter split-gso rtt 100.0ms noatm overhead 22 > qdisc ingress ffff: parent ffff:fff1 ---------------- > > tc qdisc show dev ifb4eth1.2 > qdisc cake 8020: root refcnt 2 bandwidth 240Mbit diffserv3 triple-isolate > nonat nowash no-ack-filter split-gso rtt 100.0ms noatm overhead 22 This looks like you're running sqm-scripts on a VLAN interface? Does it make any difference if you run it on the physical eth1? -Toke _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
