On Fri, Jan 20, 2006 at 05:07:15PM -0700, John Smith ([EMAIL PROTECTED]) wrote:
> Hi,
>
> I just have some questions about the packet splitting which is supported by
> some PCI-express platforms. It seems the packet data buffer part (header
> and payload) is splitted into several parts and stored into different
> buffers while PCI-X NIC use 2K data buffer for every packet.
>
> My question is: what is the purpose of this packet splitting? It seems each
> splitted part has different size, why not choose a uniform size for each
> part?
> It seems it serve the same purpose as copybreak. Can anyone please me give
> some more hints.
I doubd it depends on pcix/pci/anything.
Some clever hardware allows to split several headers from data payload,
which allows to implement receiving zero-copy support for such NICs.
> Thanks a lot,
>
> John
--
Evgeniy Polyakov
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