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Rép. : Re: TCP/IP problem
- From: "Marc Pignat" <marc dot pignat at hevs dot ch>
- To: <gthomas at ecoscentric dot com>
- Cc: <ecos-discuss at sources dot redhat dot com>
- Date: Fri, 27 Sep 2002 14:07:03 +0200
- Subject: [ECOS] Rép. : Re: [ECOS] TCP/IP problem
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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Gary Thomas |
eCosCentric, Ltd. |
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