Re: [Bulk] Re: has anyone tried adsl-optmizer kernel patches for dsl modems?

Linux Advanced Routing and Traffic Control

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Markus Schulz wrote:
On Wednesday 23 November 2005 14:23, Sophana Kok wrote:

Markus Schulz wrote:

On Wednesday 16 November 2005 16:03, Andy Furniss wrote:

I use something similar and use ceil 286kbit while synced at
288kbit without problems.

What thing similar do you use? I don't understand why it is not in
the kernel already.


sounds like he has calculated the constant overhead for each htb-class and set the ceil value to according this. this is equivalent to the stuff from adsl-optimizer. in both ways you need to setup classes for packets with same average size or it won't work. Most important is the class for ACK-only packets cause they have the biggest overhead. correct me if i'm wrong.

Nothing to do with htb classes, though you are right about small packets being a pain - they typically use 2 x 53 byte atm cells.

The patches make htb lookup the delay of one less than the aal5 length in a table that is generated by a patched tc so the delay returned is the delay of the packet when it is atm cells.



should be easy to patch in. Overhead is only a simple variable which
will be added in htb/* module for each paket. Only sign/unsign
problem should be considered.

How?


this refers to the possible negativ overhead mentioned from Andy Furniss by use of pppoe.

It's pppoa, pppoe has > 14 overhead.

Andy.
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