Scott Feldman writes:
> Thank you Robert for trying it out.
>
> Well those results are counter-intuitive! We remove Tx interrupts and
> Tx descriptor DMA write-backs and get no re-tries, and performance
> drops? The only bus activities left are the DMA of buffers to device
> and the register writes to increment tail. I'm stumped. I'll need to
> get my hands on a faster system. Maybe there is a bus analyzer under
> the tree. :-)
Huh. I've got a deja-vu feeling. What will happen if we remove almost all
events (interrupts) and just have the timer waking up once-in-a-while?
--ro
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