On 8/8/12 4:06 AM, mvp...@iol.pt wrote:
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?
It's a hardware limitation of the NIC. I think designing an efficient cut-through NIC would be pretty challenging given commodity I/O architecture.
I think that some switch do cut-trough, did someone knows how this is implemented, or know some doc about this.
Dally and Towles wrote a book about how switch chips work: http://store.elsevier.com/product.jsp?isbn=9780122007514
-- Wes Felter IBM Research - Austin _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
