[openbeosnetteam] Re: Dial-Up
- From: "Bruno G. Albuquerque" <bga@xxxxxxxxxxxxx>
- To: openbeosnetteam@xxxxxxxxxxxxx
- Date: Wed, 9 Apr 2003 17:02:24 -0300 (BRT)
On Wed, 9 Apr 2003, Axel =?iso-8859-1?q?D=F6rfler ?= wrote:
> It can't achieve this alone. The networking drivers would have to be
> changed for this - the read/write functions of the driver mustn't be
> used when want to remove all copies (since we can't remove the one that
> happens when the recv() function is called).
> We could also provide a zero copying userland C++ API - that would be a
> nice advantage over using the standard BSD socket API.
Just to remind that it is ok to have zero-copy for receiving data, but
zero-copy for *SENDING* data (specially TCP packets) is overkill and will
actually decrease performance (due to retransmission).
-Bruno
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