29.3. Starting and Stopping OProfile
Using log file /var/lib/oprofile/oprofiled.log Daemon started. Profiler running.
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
nmi_watchdogregisters with the
perfsubsystem. Due to this, the
perfsubsystem grabs control of the performance counter registers at boot time, blocking OProfile from working.
nmi_watchdog=0kernel parameter set, or run the following command to disable
nmi_watchdogat run time:
echo 0 > /proc/sys/kernel/nmi_watchdog
nmi_watchdog, use the following command:
echo 1 > /proc/sys/kernel/nmi_watchdog