Re: [LARTC] exact rate

[Jody Shumaker <jody.shumaker@gmail.com>]

Thing is, it did not work for me, because of that exact reason.  I had 
issues with it ignoring rates and in general not giving the lower 
latency I was going for. I really wish someone would update it.  
lartc.org is broken right now, but I believe the version up there is 3 
years old.

- Jody

Salim wrote:

> What confuses me is, how the popular HTB script 'wondershaper' works! 
> The sum of its subclasses' rates is way over the parent's rate.
>
>     ----- Original Message -----
>     *From:* Jody Shumaker <mailto:jody.shumaker@gmail.com>
>     *To:* Anton Glinkov <mailto:lartc@ssi.bg>
>     *Cc:* lartc@mailman.ds9a.nl <mailto:lartc@mailman.ds9a.nl>
>     *Sent:* Friday, December 23, 2005 4:22 AM
>     *Subject:* Re: [LARTC] exact rate
>
>     Your subclass's combined rate's should never exceed your parent
>     class's rate, and in this case your parent class is 5mbit, yet
>     your subclasses have a combined guarenteed bandwidth of 6mbit.  In
>     my setup,  the root classes rate is followed strictly.   With
>     burst, it may go over temporarily but over say a minute's time,
>     the bandwidth is pretty close to the set rate, usualy within
>     ~0.4%. I'm unsure on what the behavior is when you allocate more
>     bandwidth to subclasses than the root, but it may be the reason
>     you're not seeing accurate results.
>
>     - Jody
>
>     On 12/14/05, *Anton Glinkov* <lartc@ssi.bg <mailto:lartc@ssi.bg>>
>     wrote:
>
>         Hello
>         I am using htb (krenel 2.6.14.3 <http://2.6.14.3> + esfq patch
>         from fatooh.org <http://fatooh.org>) to limit the
>         bandwidth. But I want the absolute maximum rate to be for
>         example 5Mbit
>         and not to exceed it.
>
>         here is the script:
>
>         $tc qdisc add dev ${NETIF} root handle 1 htb r2q 4
>         $tc class add dev ${NETIF} parent 1: classid 1:21 htb rate
>         5Mbit ceil 5Mbit
>         $tc class add dev ${NETIF} parent 1:21 classid 1:101 htb rate
>         2Mbit ceil
>         5Mbit prio 1
>         $tc class add dev ${NETIF} parent 1:21 classid 1:102 htb rate
>         1Mbit ceil
>         5Mbit prio 2
>         $tc class add dev ${NETIF} parent 1:21 classid 1:103 htb rate
>         3Mbit ceil
>         5Mbit prio 3
>
>         when I don't specify burst the flow always exceeds 5Mbit
>         when I try to play with it (the burst) for example turning it
>         off completely
>         burst 0 cburst 0 for parent and children classes the rate
>         falls ot 2-3 Mbits
>
>         removing the esfq qdiscs doesn't change anything...
>
>         I want exact rate of 5Mbit for the parent class and no more?
>
>         any suggestions are welcome :)
>
>         --
>         Anton Glinkov
>         network administrator
>

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