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zero_copy in RTEMS
- Date: Fri, 19 Dec 2008 17:17:38 -0500
- From: gds at chartertn.net (Gene Smith)
- Subject: zero_copy in RTEMS
??? wrote, On 12/19/2008 07:14 AM:
> Hi all:
> Does anyone know how to implement zero copy in RTEMS ?
> Thanks in advance.
I assume you are referring to the tcp/ip stack? I think some DMA
controllers can put their inputs and accept outputs directly from BSD
mbufs (like EMAC on ppc405gpr controller). But I am not sure how many
other places (or even if) the packets are memcpy'd in the stack.