Actual maximum data rate of Nios w/ 10/100/1000 TSE MAC on Stratix IV

Hi all! Thanks for the reply

I found what the problem was. Thanks to Daixiwen for pointing the suspicious part :). The problem was caused by unappropriate buffer & packet size configuration. From several trials, I found that if the defined buffer & packet size were bigger than the required buffer by NicheStack, the NicheStack would be not created / failed (the FPGA couldn't be contacted via TCP/IP connection). Now my FPGA datarate is 72 Mbps.

Even though the datarate becomes higher, it is still lower than what I expected. So now I'm trying to replace the network checksum function with the accelerator hardware using C2H compiler. However when I built the application file, I got this following error :

getValue Error : unknown parameter c2hacceleratorgroup

Anybody know what caused the error & how to solve it?

Is it possible to make offload TCP design? If it is possible, what things that I have to consider?

Thanks