[Cake] Help with the AQM layer

Kevin Darbyshire-Bryant kevin at darbyshire-bryant.me.uk
Mon Oct 12 04:12:38 EDT 2015

Hi Logan,

On 08/10/15  I pushed an 'exposeinterval' feature branch to both mine &
dave's sch_cake & tc-adv repos (so module & user side changes) which
exposed the interval (rtt) parameter.  By the following morning it even
worked!  On Morning of 11th Dave sent an email "adding 'rtt' support
correctly" to which I rather assumed my 'exposeinterval' branch was
superfluous, incorrect and unneeded so I removed them from Dave's repos
in the expectation of great things.

You'll still find my original versions of that branch
https://github.com/kdarbyshirebryant/sch_cake/tree/exposeinterval &

A glance over Dave's patch suggests the only difference to the
'rtt/interval' side of things between his & mine is using nanoseconds in
the pass from user-space to kernel space rather than my use of milliseconds.

If you provide tc with a 'rtt 300ms' parameter it should work a treat.


On 12/10/15 08:47, Loganaden Velvindron wrote:
> Hi folks,
> I'm reading about this on the website:
> "
> The AQM layer has no configuration options. However, it is planned to
> add simple tuning options for different prevailing RTTs that may be
> significantly different from the Internet-scale 100ms currently
> assumed. Satellite links tend to impose longer RTTs, and enclosed LANs
> tend to have much shorter RTTs.
> "
> In Mauritius, and other african countries, we have RTT of around
> 300-400 ms. Could someone please point me to where I should look for
> adding a tunable for this in the source files ?
> Kind regards,
> //Logan
> C-x-C-c
> _______________________________________________
> Cake mailing list
> Cake at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cake

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