[ECOS] Rép. : Re: [ECOS] TCP/IP problem

[Marc Pignat]

Thanks for your response !

I know that, but overall traffic is less than 50 kbit/s.

It is also a "small" embedded device (ARM7 @ 32MHz)... with a smsc lan91c111 controller. 
Perhaps a driver problem.

Is the networking stack running ok on "big" hardware ? (i.e. x86 @ 2GHz) ?



>>> Gary Thomas <gthomas@ecoscentric.com> 27/09/02 14h02 >>>
On Fri, 2002-09-27 at 00:13, Marc Pignat wrote:
> 
> Have you noticed performance problem with tcp/ip ?
> 
> When connected throught a switch, there is no problem and with a hub, a small amount of network traffic reduce the performance by a 10 factor...

This is most likely a result of collisions.  On a switch,
each connections between endpoints is virtual - just like
a single, private wire.  On a hub, all connections share
the same wire.  The way that ethernet transmissions happen,
there will always be collisions on shared transmission media.

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