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Altera_Forum
Honored Contributor
Honored ContributorDelay of TCP transmission
I use uC RTOS and Nichestack and I have a strange delay in the trasmission of TCP data. I can't understand if this is normal. I establish a connection where my pc is the client and the Nios is ...
Altera_ForumHonored Contributor
Honored ContributorUpdated information.
At the moment I found a workaround to bypass the problem in my application. I slightly changed the code to avoid the double answer: upon the receipt of the command data from the client, the application now waits for data from the upper layer and transmit all data with a single send() call. As I expected, the delay disappeared, at the price of a somehow more inefficient code. I need to test if this is good for me in any condition. Infact the tcp stack is working now in a very inefficient synchronous way, for the Niche stack requires every single packet to be acknowledged, instead of sending data until the tcp window goes to zero. A wide tcp window is useless: it behaves as if the stack zeroes the tcp window whenever it sends some data!!! Cris
