linux - Will EAGAIN return on send for anything other than buffer full? -

If I send () on a non-blocked TCP socket in Linux, then this is a send buffer full condition?

I need to decide if I want to send the socket to the buffer as the only buffer for my app or if I need my own user space buffer to feed the socket buffer is.

It should not be, but I do not know that your decision in one or the other way of user space buffer How does it affect Regardless of the specific reason to receive EAPAD, you will either need a buffer based on your app.

You can think of changing the TCP buffer size, after which SO_SNDBUF option is calculating something to see if it is actually a performance win or not.