I am also having the problem that in my application, sending/receiving at 20Hz over a localhost/loopback connection, sometimes stalls for exactly 5000ms. This happens mostly on slower (e.g. Athlon X2 4400+) than on faster (e.g. i7-930) machines. Torben Wiggerich wrote
Have you put an analyzer (e.g. WireShark) on it and watched the TCP packets from right before and when the pause occurs? This might help isolate the problem.
Ok I will try this...
Did this help finding the source of the problem? As explained here (http://wiki.wireshark.org/CaptureSetup/Loopback), Wireshark/WinPcap will not be able to capture traffic over the loopback device. As suggested, I used RawCap (http://www.netresec.com/?page=RawCap) instead. I filter the data using "tcp.port == 1234" to not get sidetracked by other traffic. I uploaded a screenshot here: http://i.imgur.com/36U62.jpg I uploaded the whole dumpfile here: http://www8.zippyshare.com/v/50356468/file.html The interesting part is probably this:
85030 16.690429 127.0.0.1 127.0.0.1 TCP 1500 [TCP segment of a reassembled PDU] 85041 21.689453 127.0.0.1 127.0.0.1 TCP 808 [TCP Previous segment lost] [TCP segment of a reassembled PDU]
You can clearly see the ~5000ms pause between those two events. Does anyone have further insight in the reason why it is exactly 5000ms, and how to maybe fix or work around it? -- View this message in context: http://boost.2283326.n4.nabble.com/asio-Randomly-having-problems-reading-fro... Sent from the Boost - Dev mailing list archive at Nabble.com.