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Altera_Forum
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13 years ago

Ethernet roundtrip time with NicheStack & Nios-II

Hi, We are using TSE IP with NichStack, MicroC OS-II on Nios-II. FPGA is running a simple UDP host which echoes all packets it gets from client. The client is a PC running real-time OS and con...
Altera_Forum's avatar
Altera_Forum
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13 years ago

If you are using the TSE driver with ucOS and the Interniche TCP/IP stack (the default with the Nios IDS) then it is using interrupts.

Are you measuring the delay for several UDP packets or just the first one? The round-trip time for the first UDP packet may be longer because you also need an ARP request and reply. You could also use a sniffer such as Wireshark to see what is happening on the Ethernet level, but I think profiling should give you also a lot of information.