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Re: Ethernet speed



Mikael Starvik wrote:
> Hi,
> 
> On a standard developer board with 2.4.19 and with 
> CONFIG_ETRAX_SERIAL_FAST_DMA_FLUSH (or similar) disabled
> you should reach approx 4 MByte/sec for receive and
> 3 MByte/sec for transmit. With custom hardware you can
> reach 5 MByte/sec for receive and 4 for transmit.

After changing from Intel NIC to 3Com 3C905, I benched about
6 MByte/s on the receive, up from 5. That's TCP - have not benched UDP.

> 
> To check your application you can do a network trace
> (with e.g. ethereal) and check that full size packets
> are used. Small packets will decrease the performace.
> 
> /Mikael
> 
> -----Original Message-----
> From: owner-dev-etrax@xxxxxxx.com]On">mailto:owner-dev-etrax@xxxxxxx.com]On
> Behalf Of Alex Raimondi
> Sent: Monday, February 10, 2003 2:16 PM
> To: dev-etrax
> Subject: Ethernet speed
> 
> 
> Hi
> 
> We are trying to send pictures out of the etrax 100lx. The ethernet physical
> chip is configured to
> send at 100Mbit. But we cannot achive this speed. We get between 10Mbit and
> 20Mbit.
> If we configure the ethernet physical to 10Mbit we get less
> 
> Has anyone done performance measuring on etrax's ethernet? What's possible
> and how can I speed up my application.
> 
> Alex


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