Ethernet packet missing for Gigabit camera

Hi,

I have a board similar to Freescale EVB board for 5475. I am using Linux 
LTIB from freescale. I am connecting a gigabit
camera to the Ethernet port to receive images from the camera.

The problem is when the camera sending pictures in UDP packets of 1500
bytes, The application I have for reading packets, misses many 
packets.The link is 100BASE-TX.
If I increase the time between packets (Ask Camera to send packets with
long delay) then all packets will be received. However if the delay
between packets is short, the application missing packets depends on the
delay.

I tried to increase the priority of program, priority of DMA, priority
of receive channel on Ethernet but none of those changed the rate of 
missing packets. Is there anyway to increase the speed of receiving 
packet on Ethernet
port in application. Would it be faster if part of code transferred to
kernel to speed up operation.

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.



Thanks,


Mehrdad Salami
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