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Hi list,
I am getting some very wierd results trying to use CBQ under linux with
2.4.4. I have created a bounded class with 64Kbit bandwidth using u32 classifier
and source + dest address for filtering. UDP is strictly limited to 64Kbit as
expected (trying with 92K flow).
When I try to run TCP across the same link the stream runs at 64Kbit
for a while than suddenly hits 200-300Kbit for a 0.02 secs (followed
by ethereal), than returns to 64Kbit. The overall bandwidth averaged over 5 mins
comes to be around 100Kbit. If I run the TCP stream(s) concurrently with some
UDP traffic the maximum height of the peaks is lower but the overall pattern
remains the same. In other words CBQ does not rate limit for TCP for some
reason.
The test systems are directly connected via a switch. They are
uniprocessor PIII with 815e chipsets, 128M RAM, NatSemi 10/100 cards, From
the relevant kernel options, ECN is turned off and all CBQ related ones are
compiled as modules. Kernel is 2.4.4.
Any ideas?
Pls, cc me on replies as I am not subscribed to the list.
Brgds,
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Anton R. Ivanov
ARI2-RIPE
Today's deliverables will have to be delayed because:
It's stuck in the Web.
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