Hello,
First thanks for the tip.
You said, "NICs only trigger an interrupt after the packet has been
completely DMAed into memory, which makes cut-through impossible to
implement on today's servers". The triggers that you speak about is done
at driver level, at kernel level or is something done by hardware? Do
someone knows if this is possible to change?
I think that some switch do cut-trough, did someone knows how this is
implemented, or know some doc about this.
Best Regards,
Marco
Citando Wes Felter <w...@felter.org>:
On 8/7/12 8:21 AM, mvp...@iol.pt wrote:
Can someone tell me if is in mind an cut-through implementation for
openvSwitch? I was thinking in do something like that.
AFAIK, NICs only trigger an interrupt after the packet has been
completely DMAed into memory, which makes cut-through impossible to
implement on today's servers. There may be some possible
optimizations that would make OVS faster, but they would have to be
something other than cut-through. I would assume OVS is already
zero-copy, so reducing copies probably won't help either.
--
Wes Felter
IBM Research - Austin
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