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

[Sebastian Moeller <moeller0@gmx.de>]

Hi Dave,
On May 10, 2015, at 22:38 , Dave Taht <dave.taht@gmail.com> wrote:

> I wish we had a good way to monitor cpu usage over the course of a test like this.

	I fully agree, I resort to ssh-ing into the router and run “top -d 1” on the shell to at least get some handle on the CPU use, to assess whether my poor wndr3700v2 runs out of steam? Just as an aside for lurkers on the list, the way to read the top output is looking at the idle percentage which should be > 0% (or looking at system user and sirq, as SIRQ typically is the highest, just looking at system and user will not give you the information you were looking for, if the question is can this router handle the offered load)

Best Regards
	Sebastian


> 
> On Sun, May 10, 2015 at 1:37 PM, Dave Taht <dave.taht@gmail.com> wrote:
> "cake" is the most current code. Please use that. I suspect you just ran into the hard bandwidth/QoS implementation in the older code. 
> 
> I had not got around to trying the "atm"  option in cake, which tries to compensate for cell size also. So you should enable that - and I havent added support for it to sqm either!
> 
> On Sun, May 10, 2015 at 10:29 AM, 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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> 
> 
> -- 
> Dave Täht
> Open Networking needs **Open Source Hardware**
> 
> https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67
> 
> 
> 
> -- 
> Dave Täht
> Open Networking needs **Open Source Hardware**
> 
> https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67
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