Markus Schulz wrote:
On Wednesday 16 November 2005 16:03, Andy Furniss wrote:
sophana wrote:
Hi
I'm using wondershaper like script. But noticed imperfect
scheduling.
By googling, I found some patches that takes the aal5 atm overhead
in the scheduling algorithms.
http://www.adsl-optimizer.dk/ADSL-optimizer/
Before trying it, has anyone tried these patches? they apply on
2.4.29 kernel and 2.6.9 TC. I use centos4 with a 2.6 kernel, so I
can't try these easily.
They should be OK as long as you are sure about your overheads.
I use something similar and use ceil 286kbit while synced at 288kbit
without problems.
If your modem is connected by eth rather than ppp then htb/whatever
will see the packet size as ip len + 14 - so you need to account for
that.
can you explain this a bit more please?
It's because htb uses skb->len for packet size and if you shape on an
eth interface this is ip length + 14, but it's just ip length if you
shape on ppp/vlan etc.
You can see this by looking at htb counters and sending fixed size packets.
I think that produces a corner case (overhead < 14) where you would
need to put in a negative number - I don't think that will work, but
haven't tried.
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.
Yep - you just need to be aware of it and I can't recall it being
mentioned in the thesis - I have only tested on 2.6 kernels.
Andy.
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