Re: Ethernet packet missing for Gigabit camera

Hi,

Mehrdad Salami schrieb:
> Just to have idea of the data and time , the camera sending 211 packet
> of 1500 bytes in 50ms and I am only reading 64 packets.  The transfer 
> data rate is 211*1500*8*20=50Mbit/s . Is this too close to 100Mbit/s 
> maximum speed of Ethernet for coldfire to handle. I think the 1500 
> packet size is only data and it must have more overhead inside packet.

I am working on a similiar board featuring an MCF5484 cpu. I measured 
the bandwidth of Ethernet with the netperf/netserver tool[1] and I 
reached between 40 (TCP STREAM) to 50 Mbit/s (UDP STREAM). I don't know 
why the bandwidth is just half of the nominal 100 Mbit/s. It might be a 
performance problem of the driver.
Maybe you should use the netperf tool in a first step and measure your 
ethernet bandwidth independently from your camera specific stuff.

Hope this helps,

Markus

[1] http://www.netperf.org/netperf/
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