Re: [Cake] fq_codel on 3g network in Mauritius

[Loganaden Velvindron <loganaden@gmail.com>]

After going through:

https://tools.ietf.org/html/draft-ietf-aqm-fq-codel-06

I think that I should remove the itarget and etarget, and set the
Interval rather to 500ms.



   The _interval_ parameter has the same semantics as CoDel and is used
   to ensure that the minimum sojourn time of packets in a queue used as
   an estimator by the CoDel control algorithm is a relatively up-to-
   date value.  That is, CoDel only reacts to delay experienced in the
   last epoch of length interval.  It SHOULD be set to be on the order
   of the worst-case RTT through the bottleneck to give end-points
   sufficient time to react.

   The default interval value is 100 ms.

The default interval value is not suited for my 3g connection where
the worse-case RTT is much higher.



On Sat, Jul 23, 2016 at 10:36 PM, Loganaden Velvindron
<loganaden@gmail.com> wrote:
>>         It seems the initial burst like behavior from the earlier test was a false positive; these test are still not beautiful, but at least they do not indicate that HTB+fq_codel as configured on your system do not suffer from uncontrolled bursty-ness. Unfortunately, I have no real insight or advice to offer how to improve your situation (short f setting the shaper rates considerably lower).
>>         BTW, “tc -d qdisc” and “tc -s disc” give a bit more information, and “tc class show dev eth1” and “tc class show dev ifb4eth1” will also offer more detail about your setup.
>>
>>
>> Best Regards
>>         Sebastian
>>
>>
>>
>
> tc -d qdisc:
>
> qdisc fq_codel 0: dev eth0 root refcnt 2 limit 1024p flows 1024
> quantum 300 target 5.0ms interval 100.0ms ecn
> qdisc htb 1: dev eth1 root refcnt 2 r2q 10 default 12
> direct_packets_stat 5 ver 3.17 direct_qlen 1000
> qdisc fq_codel 110: dev eth1 parent 1:11 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
> qdisc fq_codel 120: dev eth1 parent 1:12 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
> qdisc fq_codel 130: dev eth1 parent 1:13 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
> qdisc ingress ffff: dev eth1 parent ffff:fff1 ----------------
> qdisc mq 0: dev wlan0 root
> qdisc htb 1: dev ifb4eth1 root refcnt 2 r2q 10 default 10
> direct_packets_stat 0 ver 3.17 direct_qlen 32
> qdisc fq_codel 110: dev ifb4eth1 parent 1:10 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms ecn
>
> tc -s qdisc:
>
> qdisc fq_codel 0: dev eth0 root refcnt 2 limit 1024p flows 1024
> quantum 300 target 5.0ms interval 100.0ms ecn
>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
>   maxpacket 256 drop_overlimit 0 new_flow_count 0 ecn_mark 0
>   new_flows_len 0 old_flows_len 0
> qdisc htb 1: dev eth1 root refcnt 2 r2q 10 default 12
> direct_packets_stat 5 direct_qlen 1000
>  Sent 23456195 bytes 109776 pkt (dropped 0, overlimits 86210 requeues 0)
>  backlog 0b 4p requeues 0
> qdisc fq_codel 110: dev eth1 parent 1:11 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
>  Sent 14760 bytes 164 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
>   maxpacket 256 drop_overlimit 0 new_flow_count 163 ecn_mark 0
>   new_flows_len 1 old_flows_len 0
> qdisc fq_codel 120: dev eth1 parent 1:12 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
>  Sent 23440300 bytes 109600 pkt (dropped 115, overlimits 0 requeues 0)
>  backlog 5816b 4p requeues 0
>   maxpacket 1454 drop_overlimit 0 new_flow_count 15749 ecn_mark 0
>   new_flows_len 0 old_flows_len 1
> qdisc fq_codel 130: dev eth1 parent 1:13 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms
>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
>   maxpacket 256 drop_overlimit 0 new_flow_count 0 ecn_mark 0
>   new_flows_len 0 old_flows_len 0
> qdisc ingress ffff: dev eth1 parent ffff:fff1 ----------------
>  Sent 190858989 bytes 149884 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
> qdisc mq 0: dev wlan0 root
>  Sent 194287835 bytes 153002 pkt (dropped 0, overlimits 0 requeues 7)
>  backlog 0b 0p requeues 7
> qdisc htb 1: dev ifb4eth1 root refcnt 2 r2q 10 default 10
> direct_packets_stat 0 direct_qlen 32
>  Sent 192953486 bytes 149877 pkt (dropped 0, overlimits 41505 requeues 0)
>  backlog 0b 0p requeues 0
> qdisc fq_codel 110: dev ifb4eth1 parent 1:10 limit 1001p flows 1024
> quantum 300 target 500.0ms interval 100.0ms ecn
>  Sent 192953486 bytes 149877 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
>   maxpacket 1454 drop_overlimit 0 new_flow_count 16778 ecn_mark 0
>   new_flows_len 1 old_flows_len 2
>
>
> tc class show dev eth1
> class htb 1:11 parent 1:1 leaf 110: prio 1 rate 128Kbit ceil 100Kbit
> burst 1600b cburst 1600b
> class htb 1:1 root rate 300Kbit ceil 300Kbit burst 1599b cburst 1599b
> class htb 1:10 parent 1:1 prio 0 rate 300Kbit ceil 300Kbit burst 1599b
> cburst 1599b
> class htb 1:13 parent 1:1 leaf 130: prio 3 rate 50Kbit ceil 284Kbit
> burst 1600b cburst 1599b
> class htb 1:12 parent 1:1 leaf 120: prio 2 rate 50Kbit ceil 284Kbit
> burst 1600b cburst 1599b
> class fq_codel 110:188 parent 110:
> class fq_codel 120:3d6 parent 120:
>
>
> tc class show dev ifb4eth1:
> class htb 1:10 parent 1:1 leaf 110: prio 0 rate 19600Kbit ceil
> 19600Kbit burst 1597b cburst 1597b
> class htb 1:1 root rate 19600Kbit ceil 19600Kbit burst 1597b cburst 1597b
> class fq_codel 110:2f1 parent 110:
> class fq_codel 110:330 parent 110:
>
> I changed the target from 350ms to 500ms for both ingress and egree,
> and the throughput seem to be better:
>
> http://www.dslreports.com/speedtest/4515961