Sounds like your CDC hardware isn't as fast as your CATC hardware, or
else the CDC code is doing some strange things to slow transfers down.
You're getting half the throughput you should get on 10BaseT!
I did a quick implementation of bulk queuing (just on the Rx path, since that was trivial). Makes no real difference to speed - might even be a tad slower. I'm doing this on 2.4.20-rc1 with OHCI.
I can't understand how it'd be slower. I would certainly expect latency
to be better ... that's what I've seen when I've measured, as well as lots
better throughput for small packets (ICMP etc).

- Dave










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