[Codel] what am i doing wrong? why isn't codel working?

[Dave Taht]

Well, if your provided rate is different from line rate on the up or
down, you need to apply a rate shaper to the interface first, not just
fq_codel alone. You have to make your device be the bottleneck in
order to have control of the queue.

openwrt has the qos-scripts and luci-app-qos packages

OR

cerowrt has the sqm-scripts and luci-app-sqm packages (and these
install on top of regular openwrt)

http://www.bufferbloat.net/projects/cerowrt/wiki/Setting_up_SQM_for_CeroWrt_310

A simple example of how htb is used in the above

http://wiki.gentoo.org/wiki/Traffic_shaping

On Tue, Jun 24, 2014 at 6:22 AM, Brian J. Murrell <brian at interlinx.bc.ca> wrote:
> Hi all,
>
> I've upgraded my router to OpenWRT Breaker Barrier r41163 which has
> kernel 3.10.36 in it.  I was pleased to see that codel appears (to my
> very newbie eyes) to be default on what should be the
> "fast->slow" (where bufferbloat happens) interfaces:
>
> qdisc fq_codel 0: dev eth0 root refcnt 2 limit 1024p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn
> qdisc mq 0: dev wlan1 root
> qdisc mq 0: dev wlan0 root
> qdisc fq_codel 0: dev pppoe-wan1 root refcnt 2 limit 1024p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn
> qdisc fq_codel 0: dev tun0 root refcnt 2 limit 1024p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn
>
> So first thing to notice is that this router has two WAN interfaces but
> only one of them (pppoe-wan1) has had codel applied.  The other WAN
> interface (eth0.2) is not even listed.
>
> So off I go to experiment with the WAN interface that does have codel
> applied...
>
> So I do the saturate-and-ping test through pppoe-wan1 and ping times go
> from ~12ms to ~1200ms, while saturating the upstream so clearly codel is
> not working there.
>
> What am I doing wrong?
>
> Cheers,
> b.
>
>
>
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>



-- 
Dave Täht

NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article