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I've run netperf on the CDC ethernet driver, and performance sucks. The CATC 
USB dongle and my 8039 PCI card get around 7 x 10e6 bits/sec, and my CDC 
hardware gets about 3.6. This is over a 10Mbps hub. The hardware on the other 
end is pretty crappy too, but its at least constantly crappy.

I'm guessing that this throughput difference is at least partly due to not 
using magic called "bulk queuing". I didn't pay enough attention when the 
implementation was being discussed, and google isn't showing me any summary 
explanations.

Can someone provide a quick "once over" on the topic, including any "gotchas"?

Brad
- -- 
http://linux.conf.au. 22-25Jan2003. Perth, Aust. I'm registered. Are you?
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