[Cake] Testing variants of the MTU latency scaling

Jonas Mårtensson martensson.jonas at gmail.com
Tue Apr 24 15:04:35 EDT 2018


On Tue, Apr 24, 2018 at 1:45 PM, Toke Høiland-Jørgensen <toke at toke.dk>
wrote:

> Jonas Mårtensson <martensson.jonas at gmail.com> writes:
>
> > One thing that is still not clear to me from these results: if I run
> > cake on an IFB without ingress mode (i.e. the default?), does the MTU
> > scaling have any impact on TCP download throughput?
>
> Odds are that not using ingress mode will make Cake lose control of the
> bottleneck (that is what happened when I tried running a quick test),
> and so will mess up both latency and throughput as you hit the bloated
> upstream link buffer...


So using cake through sqm-scripts in OpenWRT/LEDE for ingress shaping does
not currently work very well then? I guess the sqm-scripts should be
updated to actually use ingress mode at some point...

/Jonas
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