Switch#show processes cpu
CPU utilization for five seconds: 10%/0%; one minute: 14%; five minutes: 13%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
219 12291030811139841997 1078 0.47% 5.51% 5.66% 0 REP LSL Hello PP
Since then I have the version 12.2 (53) SE2've installed a process called "REP LSL Hello PP has emerged.
This needs at least 5% - 16% of CPU power. Unfortunately I can not say what he does exactly. It would be nice if Cisco would be the function of this process are known.