Re: zero-copy TCP

From: Richard Gooch (
Date: Sun Sep 03 2000 - 10:13:52 EST

Andrew Morton writes:
> Jes Sorensen wrote:
> >
> > I only know of a few 100baseT cards that can do it such as the
> > Adaptec Starfire and the 3C905B
> > (though I am not sure what it provides is sufficient).
> The 3c905, 3c905B, 3c905C and all 3Com Cardbus NICs will do
> scatter and gather of up to 63 fragments per packet with
> byte-granular fragment alignment and length.
> All of them except the 3c905 provide hardware Rx and Tx
> checksumming of IP, TCP and UDP headers. No 64 bit
> addressing support.

And does the driver support it? Has anyone benchmarked the performance
difference (if any)?


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