On Tue, May 19, 2009 at 05:04:16PM +0300, Vladimir Ivashchenko wrote:

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Please disregard my comment about HFSC. It still overspills heavily.

On a 400 mbps limit, I'm getting 520 mbps actual throughput.

I guess you should send some logs. Your previous report seem to show

Can you give some hints on which logs you would like to see?

Similarly to Antonio's: ifconfigs and tc -s for qdiscs and classes at
the beginning and at the end of testing.

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the sum of sc rates of of children could be too high. You seem to
expect the parent's sc and ul should limit this, but actually children
rates decide and parent's rates are mainly for lending/borrowing (at

The children's ceil rate is 70% of the parent 1:2 class rate.

How about children's main rates?

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least in HTB). So, it would be nice to try with one leaf class first,
(similarly to Antonio) how high rates are respected.

Unfortunately its difficult for me to play with classes as its real traffic. 
I'll try to get a traffic generator.

Let it be the real traffic, but please re-check these rates sums.

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High drop should be OK if the flow is much faster than scheduling/
hardware send rate. It could be a bit higher than in older kernels
because of limited requeuing, but this could be corrected with
longer queue lenghts (sfq has a very short queue: max 127).

I don't think its sfq, since I have the same sfq qdiscs with HSFC.

Also I'm comparing this to my production HTB box has 2.6.21.5 with esfq 
and no bond (just eth), esfq also has 127p limit.

I tried to get rid of bond on the outbound traffic, I balanced traffic
via eth0 and eth2 manually by splitting routes going through them.

I still had the same issue with HTB not reaching the full speed.

I'm going to try testing exactly the same configuration on 2.6.29 as I have
on 2.6.21.5 tonight. The only difference would be that I use sfq(dst) instead of
esfq(dst) which is not available on 2.6.29.

I'm a bit lost about your configs/results and not reaching vs.
overspilled, so please send some new data to compare (gzipped?).

Jarek P.