[Cake] ack-filtering effectiveness

[Dave Taht]

So I finally deployed the final cake on one of my campus links, now overnight...

I figure my workload is at least 90% acks. Wow. 10% of all packets get
dropped...

qdisc cake 800a: root refcnt 9 bandwidth 9Mbit diffserv3
triple-isolate nat nowash ack-filter split-gso rtt 100.0ms noatm
overhead 18 mpu 64

 Sent 240106060 bytes 2349457 pkt (dropped 227433, overlimits 3029336
requeues 4)

 backlog 0b 0p requeues 4

 memory used: 186624b of 4Mb

 capacity estimate: 9Mbit

 min/max network layer size:           28 /    1500

 min/max overhead-adjusted size:       64 /    1518

 average network hdr offset:           14


                   Bulk  Best Effort        Voice

  thresh      562496bit        9Mbit     2250Kbit

  target         32.3ms        5.0ms        8.1ms

  interval      127.3ms      100.0ms      103.1ms

  pk_delay          0us        1.2ms        542us

  av_delay          0us         65us         22us

  sp_delay          0us          4us          4us

  backlog            0b           0b           0b

  pkts                0      2565574        11316

  bytes               0    253689714      1560599

  way_inds            0       162791          938

  way_miss            0       146889          618

  way_cols            0            0            0

  drops               0          115            0

  marks               0            0            0

  ack_drop            0       227318            0

  sp_flows            0           15            1

  bk_flows            0            1            0

  un_flows            0            0            0

  max_len             0        14940          590

  quantum           300          300          300



-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619