Re: [Cake] openwrt build with latest cake and other qdiscs

[Sebastian Moeller <moeller0@gmx.de>]

HI Alan,

I believe we got side tracked while discussing cake’s atm adaptation layer, but with a bit of luck you could use tc’s stab option to add the overhead and leave the atm encapsulation to cake (which does a better job than stab). If you could try and report back that would be helpful. I am a bit in a hurry, but will have more time next week to help out if need be…


Best Regards
	Sebastian

On May 10, 2015, at 19:29 , Alan Jenkins <alan.christopher.jenkins@gmail.com> wrote:

> Hi again
> 
> I tested Dave's build of cake on wndr3800.  (Didn't try specifying cake2/cake3; I'm guessing tc cake means cake3 on there).  "atm" adjustment worked fine on my adsl.  I can't distinguish it from sqm-scripts with the same configuration.
> 
> SQM seems to win from having "overhead 40", which I can't configure in cake.
> 
> 
> up / kbit/s
> down / kbit/s
> overhead / bytes
> Median RRUL / ms
> SQM
> 16000
> 950
> 0
> 74
> Cake
> 17175
> 995
> 0
> 76
> 
> 
> 
> 
> 
> Cake
> 16000
> 950
> 0
> 74
> SQM
> 17175
> 995
> 40
> 70
> 
> 
> 
> 
> 
> DSL sync rate
> 17619
> 1020
> 
> 59
> 
> IMO it wouldn't hurt for 'tc atm', 'tc adsl', and everything else to default to 'overhead 44'.  (The highest overhead Seb reported; the original worst case overhead[1] plus a vlan header for IPTV).
> 
> Alan
> 
> [1] http://ace-host.stuart.id.au/russell/files/tc/tc-atm/#usage
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