tulip vs. Lite On

[Robert G. Brown]

On Tue, 8 Dec 1998, Douglas Eadline wrote:

> lite-on to tulip:
> ==================
> 
>  65535    1472   60.00      363875      0      71.42
>  65535           60.00      363875             71.42
> 
>  65535  65535  65535    60.00      71.06   
> 
> tulip to lite-on:
> =================
> 
>  65535    1472   59.99      487411      0      95.68
>  65535           59.99      487411             95.68
> 
>  65535  65535  65535    60.00      94.76   
> 

So, the lite-on transmitter is somehow bollixed up.  Very interesting.

> I do not have a whole lot of time today (like when do I have time).
> Actaully, I was going to try netpipe which gives a graph of the
> performance.

:-) I certainly know about the time thing...

> > 
> Well, I'm sure it could be a driver problem.  I just tried "out of the
> box" measurements because the assumtion was the lite-on was plug and
> play.

Alas, I think Don had to patch the tulip driver pretty extensively for
the lite-on.  As in, the first linksys card I got didn't work at all
until he finished some hacking to support it.  It looks like the NIC is
"capable" of wire speed reception; I'd bet this is either a software
problem in the transmission code or something really broken in the
card's busmastering or DMA handling.

   rgb

Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb@phy.duke.edu