[etherlab-users] Intermittent Large number of datagrams UNMATCHED

Henry Bausley hbausley at deltatau.com
Fri Jul 1 19:55:41 CEST 2016

We have a etherlab 1.5.2 kernel mode application running in xenomai
2.4.6 on Ubuntu 14.04.1 Desktop that will get on rare  occasions a large
number of datagrams UNMATCHED.  It occurs at random times and relatively
rarely but when it occurs it can result in disaster as we are running a
large number of servos in torque mode.

For example we can run continuously for 5 days 24hours continuously then
get a message like something below.

[591785.735172] EtherCAT WARNING 0: 616 datagrams UNMATCHED!
I am struggling as to where to look.  Is this something in our app or a
known bug in the stack?

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