User space zero copy HOWTO?

User space zero copy HOWTO?

[Camm Maguire]

Greetings!  Is there any faq/sample code somewhere showing how to get
zero copy tcp/ip with kernel 2.4, and what special hardware if any is
required?  Any information most appreciated.  Kindly cc me directly.

Take care,

-- 
Camm Maguire			     			camm@enhanced.com
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

Re: User space zero copy HOWTO?

[Camm Maguire]

Greetings, and thanks for this.  If I recall, there is some facility
for this in the tulip cards too, no?  Can one get any benefit with
100Mbps, or is the copy too fast anyway?  Is the source code for Tux
available somewhere?  This is probably the best bet.  It seems as
though the source for X15 is not available.  Any pointers
appreciated.  I'm investigating implementing something like this for
the lam MPI libs.

Take care,

"Albert D. Cahalan" <acahalan@cs.uml.edu> writes:

> > Greetings!  Is there any faq/sample code somewhere showing how to get
> > zero copy tcp/ip with kernel 2.4, and what special hardware if any is
> > required?  Any information most appreciated.  Kindly cc me directly.
> 
> The hardware must do scatter-gather and IP checksuming.
> 
> The Alteon-based gigabit cards do this well. They are fully
> programmable, and even have a developer's kit that can be used
> to implement non-IP message passing protocols.
> 
> 
> 
> 

-- 
Camm Maguire			     			camm@enhanced.com
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah