eCos TCP/IP footprint.

Hi there,

    Anybody have experience in implementing an eCos TCP/IP stack on an ARM?
Is a footprint of 200k program memory and 120k data memory reasonable?
Seems a little high to me.  Without too much eCos experience, I might have
expected about half the program memory and 1/4 the data memory.

--
Alf Katz
alfkatz@remove.the.obvious.ieee.org

On Mon, 27 Sep 2004 18:52:11 +1000, "Unbeliever"
<alfkatz@remove.the.bleedin.obvious.ieee.org> wrote:

>    Anybody have experience in implementing an eCos TCP/IP stack on an ARM?
>Is a footprint of 200k program memory and 120k data memory reasonable?
>Seems a little high to me.  Without too much eCos experience, I might have
>expected about half the program memory and 1/4 the data memory.

I can't say about eCos, but our PowerNet system
  www.mpeltd.demon.co.uk/powernet.htm
with multithreaded Telnet and web server fits into most ARMs in
about 110k code. RAM usage is all about buffer space and other
trade-offs, and whether the stack is general purpose or
specialised. We're currently porting PowerNet to LPC2106 with
128k Flash and 64k RAM - I'll report performance/code/RAM
figures when the port is complete.

Stephen
--
Stephen Pelc, stephenXXX@INVALID.mpeltd.demon.co.uk
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeltd.demon.co.uk - free VFX Forth downloads

On 2004-09-27, Unbeliever <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote:

> Anybody have experience in implementing an eCos TCP/IP stack
> on an ARM?

Yes.

> Is a footprint of 200k program memory and 120k data memory
> reasonable?

Yes.

> Seems a little high to me.

You could probably lower the data memory a little bit if you
know you aren't going to have more than 1-2 sockets open at a
time.

> Without too much eCos experience, I might have expected about
> half the program memory and 1/4 the data memory.

Why?

You'd probably be better off asking stuff like this on the
eCos mailing list [Or just searching the eCos mailing list].

-- 
Grant Edwards                   grante             Yow!  I know things about
                                  at               TROY DONAHUE that can't
                               visi.com            even be PRINTED!!

I believe there is a port of lwIP to eCos.  It should provide for a
smaller footprint than the standard stack.

Regards
-Bill Knight
R O SoftWare
the ARM Patch


On Mon, 27 Sep 2004 18:52:11 +1000, "Unbeliever"
<alfkatz@remove.the.bleedin.obvious.ieee.org> wrote:

>Hi there,
>
>    Anybody have experience in implementing an eCos TCP/IP stack on an ARM?
>Is a footprint of 200k program memory and 120k data memory reasonable?
>Seems a little high to me.  Without too much eCos experience, I might have
>expected about half the program memory and 1/4 the data memory.