To start monitoring the system with OProfile, execute the following command as root:
| opcontrol --start | 
Output similar to the following is displayed:
| Using log file /var/lib/oprofile/oprofiled.log Daemon started. Profiler running. | 
The settings in /root/.oprofile/daemonrc are used.
The OProfile daemon, oprofiled, is started; it periodically writes the sample data to the /var/lib/oprofile/samples/ directory. The log file for the daemon is located at /var/lib/oprofile/oprofiled.log.
To stop the profiler, execute the following command as root:
| opcontrol --shutdown |