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RE: Ethernet driver 10 not 100 Mbps



Hi,

The ETRAX 100LX is capable of 100 Mbps. The speed is negotiated
between the Ethernet transceiver and the hub, the kernel is not
involved in the speed selection. If the switch shows 100 MBps
then the negotiated speed is 100 MBps (unless your switch is
broken). I have no idea why you only get 10 Mbps in your tests
(we have made several performance tests that shows that the 
Ethernet performance of linux running on a developer board far
exceeds 10 Mbps).

>And we also noticed what where is not enough memory on the board to
fragment 
>big packeges with a big speed ... 
>is simple way to add na normal 8 MB compact flash ?? (an old flash from my 
>kodak digital photo) 

No, it is not simple to add compact flash to a developer card
(would require lots of soldering) and a compact flash won't
help you if you think you have too little RAM.

Regads
/Mikael



-----Original Message-----
From: owner-dev-etrax@xxxxxxx.com]On">mailto:owner-dev-etrax@xxxxxxx.com]On
Behalf Of polto
Sent: Friday, June 28, 2002 4:57 PM
To: dev-etrax
Subject: Ethernet driver 10 not 100 Mbps



Hello all! 

I patched the ethernet and others file of kernel 2.4.14 and the kernel can 
now handle large size packets without crashing. 

Now we have make somes tests with the devboard... our switch show the 
devboard as a 100 Mbps but the kernel handle only 10 mbps... it's easy to 
see with iptables on the board and iptraf on the PC ... 


The second thing is a litle (1 second) sleep of the ethernet in plain BIG 
BIG ICMP flood ... the board respond at 10 Mbps and some times the ethernet 
led stop a second and restart to send/receve packeges ... 

Is it possible to have a real 100 Mbps on the board ?? 

And we also noticed what where is not enough memory on the board to fragment

big packeges with a big speed ... 

is simple way to add na normal 8 MB compact flash ?? (an old flash from my 
kodak digital photo) 

 

Thanks !! 

PS: sorry for my english... 

Alexander Poltorak
Alsenet S.A.