[Bloat] How can I tell if fq_codel is running?

[Stephen Hemminger]

On Tue, 30 Jul 2019 15:34:21 -0700
Kenneth Porter <shiva at sewingwitch.com> wrote:

> I'm running CentOS 7 on a Dell R230 as a small office router. It's on a 
> slow ADSL link, 1.5 Mbps down and 150 kbps up. The kernel supports 
> fq_codel, as does the tg3 driver used by the interfaces.
> 
> In the past I've run the Wondershaper script and now I'm hoping the new 
> codel improves on that. I think it's installed but I don't see its name 
> in a "tc show". Should I see it there? Is there additional setup I need 
> to do?
> 
> The system seems responsive but I've been tasked with prioritizing the 
> network for certain users. Before, I set up some buckets in the 
> wondershaper for that. I'm now trying to figure out how that's supposed 
> to work with codel, which is ostensibly "knob-free".
> 
> [root at saruman ~]# tc -s class show dev em2
> class mq :1 root
>   Sent 127961591021 bytes 412946653 pkt (dropped 0, overlimits 0 
> requeues 2726)
>   backlog 0b 0p requeues 2726
> class mq :2 root
>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>   backlog 0b 0p requeues 0
> class mq :3 root
>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>   backlog 0b 0p requeues 0
> class mq :4 root
>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>   backlog 0b 0p requeues 0
> class mq :5 root
>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>   backlog 0b 0p requeues 0
> [root at saruman ~]# sysctl net.core.default_qdisc
> net.core.default_qdisc = fq_codel

Try:
root at OpenWrt:~# tc qdisc show
qdisc noqueue 0: dev lo root refcnt 2 
qdisc mq 0: dev eth1 root 
qdisc fq_codel 0: dev eth1 parent :8 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :7 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :6 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :5 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :4 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :3 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :2 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth1 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc mq 0: dev eth0 root 
qdisc fq_codel 0: dev eth0 parent :8 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :7 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :6 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :5 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :4 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :3 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :2 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev eth0 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc noqueue 0: dev br-lan root refcnt 2 
qdisc noqueue 0: dev eth0.1 root refcnt 2 
qdisc noqueue 0: dev eth1.2 root refcnt 2 
qdisc mq 0: dev wlan1 root 
qdisc fq_codel 0: dev wlan1 parent :4 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan1 parent :3 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan1 parent :2 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan1 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc mq 0: dev wlan0 root 
qdisc fq_codel 0: dev wlan0 parent :4 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan0 parent :3 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan0 parent :2 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn 
qdisc fq_codel 0: dev wlan0 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn