How did you test the latency ?
Did you try to test the latency the system imposes onto a user thread
with simpler tasks than Ethernet packets (e.g. an interrupt from a
dedicated timer driver) ?
If the latency is mainly imposed by the network stack, a great
improvement could be achieved by a "zero-copy-stack". I read that same
is available for Linux and is used in routers that without same could
not be done using Linux. I don't know if a zero-copy-stack is easily
available and what is necessary to port it to uCLinux-NIOS.
-Michael
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