fedora-docs-l10n/fedora-system-administrat/f39/pages/monitoring-and-automation/OProfile

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	The general syntax for [command]#opannotate# is as follows:
	~]# opannotate --search-dirs src-dir --source executable
	These command-line options are mandatory. Replace _src-dir_ with a path to the directory containing the source code and specify the executable to be analyzed. See the `opannotate(1)` manual page for a list of additional command line options.
	[[s1-oprofile-dev-oprofile]]
	Understanding the /dev/oprofile/ directory
	indexterm:[OProfile,/dev/oprofile/]indexterm:[/dev/oprofile/] When using OProfile in legacy mode, the `/dev/oprofile/` directory is used to store the file system for OProfile. On the other hand, [command]#operf# does not require `/dev/oprofile/`. Use the [command]#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.
	* `extra` — Used on machines with Nehalem processors to further specify 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 [command]#cat# command. For example:
	~]# cat /dev/oprofile/0/count
	[[s1-oprofile-example-usage]]
	Example Usage

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