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dtaht / sch_cake

Out of tree build for the new cake qdisc
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request : able to add leaf qdisc under cake #150

Closed yutayu closed 3 years ago

yutayu commented 3 years ago

I use tbf qdisc + fq qdisc. But it takes latency. I wanted to use fq with cake.

yutayu commented 3 years ago

tc qdisc add dev eth0 root handle 1: stab linklayer atm overhead -4 tbf rate 840kbit latency 300ms burst 1696 tc qdisc add dev eth0 parent 1: fq limit 1000

like this.

chromi commented 3 years ago

On 21 May, 2021, at 2:10 pm, yutayu @.***> wrote:

tc qdisc add dev eth0 root handle 1: stab linklayer atm overhead -4 tbf rate 840kbit latency 300ms burst 1696 tc qdisc add dev eth0 parent 1: fq limit 1000

Replace both these lines with:

tc qdisc add dev eth0 root handle 1: cake bandwidth 840kbit flows atm overhead 10

You will not need the FQ qdisc, because Cake includes a good FQ implementation. You will not need TBF or STAB, because Cake's shaper does a better job of shaping than TBF and includes the overhead compensation features that you're using from STAB. Cake's "overhead" parameter is specified relative to the Layer 3 IP packet which is what actually gets encapsulated in most alternative link layers, whereas STAB specifies relative to a Layer 2 Ethernet packet.

yutayu commented 3 years ago

@chromi Shame on me. Thanks a lot : )