Red Hat ENTERPRISE LINUX 4 System Administration Manual page 383

Graphical Interface
On the right side of the tab, select the Profile kernel option to count events in kernel mode for the
Section 40.2.3, "Separating Kernel and User-space Profiles".
currently selected event, as discussed in
If this option is unselected, no samples are collected for the kernel.
Select the Profile user binaries option to count events in user mode for the currently selected
Section 40.2.3, "Separating Kernel and User-space Profiles". If this option is
event, as discussed in
unselected, no samples are collected for user applications.
Use the Count text field to set the sampling rate for the currently selected event as discussed in
Section 40.2.2.1, "Sampling Rate".
Section 40.2.2.2,
If any unit masks are available for the currently selected event, as discussed in
Masks", they are displayed in the Unit Masks area on the right side of the Setup tab. Select the
"Unit
checkbox beside the unit mask to enable it for the event.
On the Configuration tab, to profile the kernel, enter the name and location of the vmlinux file
for the kernel to monitor in the Kernel image file text field. To configure OProfile not to monitor the
kernel, select No kernel image.
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