On Thu, May 14, 2015 at 3:22 PM, Kevin Darbyshire-Bryant <[email protected]> wrote: > Hi Chaps, > > Further to Dave's recent request for 'tc -s qdisc' stats looking at drops vs > ecn marks, please could someone take a look at these and explain to this > idiot quite what is going on? This is a particularly slow & ratty ADSL line > providing my parents internet 'service'. Before I got hold of it with > OpenWrt CC trunk + cake jammed in it, 6 seconds of bufferbloat was not > uncommon. I'm using the default sqm scripts that arrive with the > 'ceropackages' repo (used as a source of patched iproute2, cake, etc) In > essence 2 questions: 1) Why no ECN marks, only drops?
http://www.bufferbloat.net/projects/cerowrt/wiki/Enable_ECN > 2) What falls into > diffserv class 0 (alias, why has nothing used it?) depends. > > Your time, patience etc is greatly appreciated. > > Kevin > > root@Router:~# tc -s qdisc show dev pppoa-wan > qdisc cake 803a: root refcnt 2 bandwidth 256Kbit diffserv4 flows > Sent 1928303 bytes 12121 pkt (dropped 73, overlimits 6915 requeues 0) > backlog 0b 0p requeues 0 > Class 0 Class 1 Class 2 Class 3 > rate 256Kbit 240Kbit 192Kbit 64Kbit > target 70.5ms 75.2ms 94.0ms 282.0ms > interval 564.0ms 601.6ms 752.0ms 2.3s > Pk delay 0us 91.4ms 17.5ms 3.2ms > Av delay 0us 2.9ms 2.9ms 53us > Sp delay 0us 5us 136us 7us > pkts 0 11754 408 32 > way inds 0 0 0 0 > way miss 0 347 404 5 > way cols 0 0 0 0 > bytes 0 1973100 28163 6537 > drops 0 73 0 0 > marks 0 0 0 0 > qdisc ingress ffff: parent ffff:fff1 ---------------- > Sent 8221609 bytes 11969 pkt (dropped 6, overlimits 0 requeues 0) > backlog 0b 0p requeues 0 > root@Router:~# tc -s qdisc show dev ifb4pppoa-wan > qdisc cake 803b: root refcnt 2 bandwidth 1512Kbit besteffort flows > Sent 7597496 bytes 11494 pkt (dropped 482, overlimits 10487 requeues 0) > backlog 0b 0p requeues 0 > Class 0 > rate 1512Kbit > target 12.0ms > interval 112.0ms > Pk delay 3.3ms > Av delay 289us > Sp delay 5us > pkts 11976 > way inds 0 > way miss 769 > way cols 0 > bytes 8270163 > drops 482 > marks 0 > > > _______________________________________________ > Bloat mailing list > [email protected] > https://lists.bufferbloat.net/listinfo/bloat > -- Dave Täht Open Networking needs **Open Source Hardware** https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67 _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
