The /dev/oprofile/ directory contains the file
system for OProfile. Use the cat command to display
the values of the virtual files in this file system. For example, the
following command displays the type of processor OProfile detected:
cat /dev/oprofile/cpu_type |
A directory exists in /dev/oprofile/ for each
counter. For example, if there are 2 counters, the directories
/dev/oprofile/0/ and
dev/oprofile/1/ exist.
Each directory for a counter contains the following files:
count — The interval between samples.
enabled — If 0, the counter is off
and no samples are collected for it; if 1, the counter is on and
samples are being collected for it.
event — The event to monitor.
kernel — If 0, samples are not
collected for this counter event when the processor is in
kernel-space; if 1, samples are collected even if the processor is
in kernel-space.
unit_mask — Defines which unit masks
are enabled for the counter.
user — If 0, samples are not
collected for the counter event when the processor is in user-space;
if 1, samples are collected even if the processor is in
user-space.
The values of these files can be retrieved with the
cat command. For example:
cat /dev/oprofile/0/count |
