[LARTC] borrowing only from parent

Linux Advanced Routing and Traffic Control

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Hello,

for example I have a parent class 1:1 defined as:

tc qdisc add dev eth0 root handle 1: htb default 12

# shape at 15 kbit almost no borrowing and no bursts
tc class add dev eth0 parent 1: classid 1:1 htb rate 15kbit ceil 1kbit burst 1b cburst 1b

# and sibling classes
# shape at 5kbit and borrow up to 5 kbit no burst
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 5kbit ceil 5kbit burst 1b cburst 1b
# shape at 10kbit and borrow up to 10 kbit no burst
tc class add dev eth0 parent 1:1 classid 1:11 htb rate 10kbit ceil 10kbps burst 1b cburst 1b

I want 1:10 and 1:11 to be able to borrow only from 1:1 so that any one of them ( 1:10 or 1:10)
go as high as 15kbit ( up to the max that 1:1 allows). But from testing that is not the situation.
1:11 goes at ~ 20kbit and 1:10 at ~ 10kbit when going at full speed at the same time. it looks like 
that they borrow not from 1:1. stats show from "tc -s -d class show" that they are not borrowing
only lending. Are they cross lending or smthn?
Bottom line is I want to have a parent class with siblings that can borrow from each other but not more 
then the rate of the parent.

Am I doing somthing wrong?

Thanks,

Anton





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