dmesg|talpha@EMC-Machine:~$ dmesg|tail
[ 3843.190718] 1563: ERROR: Unexpected realtime delay; check dmesg for details.
[ 3843.190744]
[ 3843.190747] In recent history there were
[ 3843.190761] 664740, 684581, 695534, 697443, and 738996
[ 3843.190767] elapsed clocks between calls to the motion controller.
[ 3843.190773] This time, there were 2270582 which is so anomolously
[ 3843.190778] large that it probably signifies a problem with your
[ 3843.190793] realtime configuration.  For the rest of this run of
[ 3843.190799] EMC, this message will be suppressed.
[ 3843.190802]