[Cake] Cake memory usage after 1TB

[Pete Heist]

I'm using Cake on an EdgeRouter-X at a site that does around 50-
100GB/day, and we're quite happy with it so far. Egress and ingress
stats are below after ~1TB download and ~100GB upload.

I use "memlimit 8M", and noticed that it's reporting 8389696 bytes used
on egress, which is at the maximum (slightly over actually). Around 6M
is used on ingress. Should I then raise these limits, or is it normal
for it to settle in around the maximum over time?

Pete


Egress:
-------

qdisc cake 8008: dev eth4 root refcnt 2 bandwidth 8Mbit diffserv4 dual-
srchost nat nowash no-ack-filter split-gso rtt 100.0ms raw overhead 0
fwmark 0xf no-sce 
 Sent 102655686381 bytes 386831397 pkt (dropped 377557, overlimits
230324326 requeues 0) 
 backlog 0b 0p requeues 0
 memory used: 8389696b of 8Mb
 capacity estimate: 8Mbit
 min/max network layer size:           42 /    1514
 min/max overhead-adjusted size:       42 /    1514
 average network hdr offset:           14

                   Bulk  Best Effort        Video        Voice
  thresh        500Kbit        8Mbit        4Mbit        2Mbit
  target         36.3ms        5.0ms        5.0ms        9.1ms
  interval      131.3ms      100.0ms      100.0ms      104.1ms
  pk_delay       17.5ms        4.1ms        1.7ms        2.0ms
  av_delay        4.5ms        232us         82us        382us
  sp_delay         14us         23us          6us          7us
  backlog            0b           0b           0b           0b
  pkts           165781    324229040     61032588      1781545
  bytes        45344666  98316181815   4518083349    291035866
  way_inds           42     18492140      7782656        34167
  way_miss         4289      6575635        77917        62650
  way_cols            0          340            0            0
  sce                 0            0            0            0
  marks               7        19542            1            0
  drops               8       377528           15            6
  ack_drop            0            0            0            0
  sp_flows            0            2            0            1
  bk_flows            0            1            0            0
  un_flows            0            0            0            0
  max_len          1514         1514         1514         1514
  quantum           300          300          300          300

Ingress:
--------

qdisc cake 1: dev ifb4eth4 root refcnt 2 bandwidth 40Mbit diffserv4
dual-dsthost nat nowash no-ack-filter split-gso rtt 100.0ms raw
overhead 0 fwmark 0xf no-sce 
 Sent 1081750548776 bytes 839670608 pkt (dropped 1616216, overlimits
657093747 requeues 0) 
 backlog 0b 0p requeues 0
 memory used: 6027328b of 8Mb
 capacity estimate: 40Mbit
 min/max network layer size:           60 /    1514
 min/max overhead-adjusted size:       60 /    1514
 average network hdr offset:           14

                   Bulk  Best Effort        Video        Voice
  thresh       2500Kbit       40Mbit       20Mbit       10Mbit
  target          7.3ms        5.0ms        5.0ms        5.0ms
  interval      102.3ms      100.0ms      100.0ms      100.0ms
  pk_delay        2.0ms        6.5ms        692us        1.1ms
  av_delay        248us        2.6ms         88us        139us
  sp_delay         12us         16us          7us          6us
  backlog            0b           0b           0b           0b
  pkts            29132    682090182    155330794      3836716
  bytes        25452377 850788764602 230875228776   2357107850
  way_inds            3     37939194     21198287        71120
  way_miss         9448      6525310        97141        51428
  way_cols            0          107            0            0
  sce                 0            0            0            0
  marks               0       206496          203           30
  drops              30      1534636        80809          741
  ack_drop            0            0            0            0
  sp_flows            0            2            0            0
  bk_flows            0            1            0            0
  un_flows            0            0            0            0
  max_len          1484         1514         1514         1514
  quantum           300         1220          610          305