NIOS II NicheStack:TCP data is not being sent at the required time interval!

You didn't specify if time update and data messages share the same tcp connection, but I guess they do.

Then, everything is routed to the same tcp stream and, from my experience, there's no reason for the dealy.

The data throughput is also very low, so sw/hw performance is not an issue.

I don't know your code, but I think you have a couple of send() calls in the functions related to data transfer and time update; then, probably you have sort of conflict between them, such as a shared data buffer which gets corrupted.

Are you using a blocking or non-blocking socket?