[Cerowrt-devel] quick survey: actual drop and mark stats from live sqm-scripts + fq_codel'd networks?

[Dave Taht <dave.taht@gmail.com>]

I am curious as to the drop and mark statistics for those actively
using their networks,
but NOT obsessively testing dslreports' speedtest as I have been :),
over the course of days.

A cron job running once an hour would work, but snmp polling with
mrtg, parsing the tc output would be better.

But a quick survey would be interesting, if you could dump your

uptime
tc -s qdisc show dev whatever
tc -s qdisc show dev your_inbound_ifb_device

here?

and also check to see if you are getting drops or marks on your core
wifi interfaces. For example a great deal of the dropping behavior for
me has moved to wifi over the last year (as we upgraded from 20mbit
down to 60 or 110mbit down), particularly on my longer distance links
but also on links that have very good same room connectivity.

example wifi interface (6 days of traffic)

qdisc fq_codel 30: parent 1:3 limit 1000p flows 1024 quantum 300
target 5.0ms interval 100.0ms ecn
 Sent 3409244008 bytes 3400248 pkt (dropped 487, overlimits 0 requeues 2703)
 backlog 0b 0p requeues 2703
  maxpacket 1514 drop_overlimit 0 new_flow_count 1637 ecn_mark 0
  new_flows_len 0 old_flows_len 0


this is the same routers external interface (60mbit downlink) (yes, I
deployed ecn on every box I could)


qdisc fq_codel 120: parent 1:12 limit 1001p flows 1024 quantum 1500
target 5.0ms interval 100.0ms ecn

 Sent 741392066 bytes 8765559 pkt (dropped 0, overlimits 0 requeues 0)

 backlog 0b 0p requeues 0

  maxpacket 1514 drop_overlimit 0 new_flow_count 2815747 ecn_mark 0

  new_flows_len 1 old_flows_len 1

qdisc fq_codel 130: parent 1:13 limit 1001p flows 1024 quantum 300
target 5.0ms interval 100.0ms ecn

 Sent 362010241205 bytes 268428951 pkt (dropped 28391, overlimits 0 requeues 0)

 backlog 0b 0p requeues 0

  maxpacket 1514 drop_overlimit 0 new_flow_count 34382791 ecn_mark 238

  new_flows_len 1 old_flows_len 3

tc -s qdisc show dev ge00 (uplink, 10mbit)

qdisc fq_codel 120: parent 1:12 limit 1001p flows 1024 quantum 300
target 5.0ms interval 100.0ms ecn

 Sent 19054721473 bytes 141364936 pkt (dropped 2251, overlimits 0 requeues 0)

 backlog 0b 0p requeues 0

  maxpacket 1514 drop_overlimit 29 new_flow_count 37418891 ecn_mark 15593

  new_flows_len 0 old_flows_len 2




-- 
Dave Täht
Open Networking needs **Open Source Hardware**

https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67