Why I can't get all UDP packets?
- by Jack
My program use UdpClient to try to receive 27 responses from 27 hosts. The size of the response is 10KB. My broadband incoming bandwidth is 150KB/s.
The 27 responses are sent from the hosts almost at the same time and for every 10 secs.
However, I can only receive 8 - 17 responses each time. The number of responses that I can receive is quite dynamic but within the range.
Can anyone tell me why? why can't I receive all?
I understand UDP is not reliable. but I tried receiving 5 - 10 responses at the same time, it worked. I guess the network links are not so bad.
The code is very simple. ON the 27 hosts, I just use UdpClient to send 10KB to my machine.
On my machine, I have one UdpClient receive datagrams. Each time I get a data, I create a thread to handle it (basically handling it means just print out "I received 10KB", but it runs in a thread).
listener = new UDPListener(Port);
listener.Start();
while (true) {
try {
UDPContext context = listener.Accept();
ThreadPool.QueueUserWorkItem(new WaitCallback(HandleMessage), context);
} catch (Exception) { }
}
If I reduce the size of the response down to 3KB, the case gets much better that roughly 25 responses can be received.
Any more idea? UDP buffer problems???
