Le 18/07/2016 à 15:50, Frédéric LOCHON a écrit :
Hello,
I'm facing a strange behavior on Windows 10 computers.
That's a little bit off-topic, but I give it a try.
Since I upgraded to Windows 10, I get some packet loss from Windows:
- I get an UDP packet every 10 ms or so coming from some equipment I
have on my network.
- I do see every packet in Wireshark (which means the link is OK).
- I don't see every packet in "Windows" (using winsock API), I loose
about 1 to 5 packets every second (not very regularly).
Hello,
I think I found the problem.
In fact, I found a solution some time ago and was lacking of time to
share it.
In my application, I get a UDP packet roughly every 16 ms (very
regularly) and I was doing something like this:
setsockopt(socketHandle, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeout,
sizeof(int));
if(recvfrom(socketHandle, data, maxSize, 0, (LPSOCKADDR)&sin,
&fromSize) < 0)
...
With a timeout value of 10 ms, I loose some packets (Wireshark sees
them, not my application).
With a timeout value of 100 ms, I don't loose any packets.
I don't quite understand the relationship. But it has proven to be the
solution.
To me, that sounds like a bug in Windows, unless anybody has some other
explanation.
Anyway, maybe that will be useful to someone one day...
Best regards,
Frédéric Lochon.
