[ECOS] Problem of eCos 82559 Ethernet Driver Performance

[Lee Doohwan]

I have a system with MIPS processor(RM7000), two i82559 ethernet controller.

I had ported eCos to the my system.

But, ethernet performance is so low.

So, I improve i82559 ethernet driver for removing memory copy.

But, the performance remain unchanged.

The performance was about 20Mbps while the system operation was bridge only.

I think,  problem is that. BSD tcp/ip stack is so slow. or, the TX routine of ethernet driver is so slow.

What is problem?