oprofile man page

oprofile ā€” a statistical profiler for Linux systems, capable of profiling all running code at low overhead; also included is a set of post-profiling analysis tools, as well as a simple event counting tool


operf [ options ]
ocount [ options ]
opreport [ options ] [ profile specification ]
opannotate [ options ] [ profile specification ]
oparchive [ options ] [ profile specification ]
opgprof [ options ] [ profile specification ]


OProfile is a profiling system for systems running Linux 2.6.31 and greater. OProfile makes use of the hardware performance counters provided on Intel, AMD, and other processors. OProfile can profile a selected program or process or the whole system. OProfile can also be used to collect cumulative event counts at the application, process, or system level.
For a gentle guide to using OProfile, please read the HTML documentation listed in See Also.


operf is a performance profiler tool for Linux.


ocount is an event counting tool for Linux.


opreport gives image and symbol-based profile summaries for the whole system or a subset of binary images.


opannotate can produce annotated source or mixed source and assembly output.


oparchive produces oprofile archive for offline analysis


opgprof can produce a gprof-format profile for a single binary.

Profile Specifications

Various optional profile specifications may be used with the post-profiling tools. A profile specification is some combination of the parameters listed below. ( Note: Enclosing part of a profile specification in curly braces { } can be used for differential profiles with opreport, but the braces must be surrounded by whitespace.)


Path to the archive to inspect, as generated by oparchive


A comma-separated list of session names to resolve in. Absence of this tag, unlike all others, means "the current session", equivalent to specifying "session:current".


A comma-separated list of sessions to exclude.


A comma-separated list of image names to resolve. Each entry may be relative path, glob-style name, or full path, e.g. opreport 'image:/usr/bin/operf,*op*,./oprofpp'


Same as image:, but the matching images are excluded.


Same as image:, but only for images that are for a particular primary binary image (namely, an application). This only makes sense to use if you're using --separate. This includes kernel modules and the kernel when using --separate=kernel.


Same as <option>lib-image:</option>, but the matching images are excluded.


The symbolic event name to match on, e.g. event:DATA_MEM_REFS.


The event count to match on, e.g. event:DATA_MEM_REFS count:30000.


The unit mask value of the event to match on, e.g. unit-mask:1.


Only consider profiles for the given numbered CPU (starting from zero). This is only useful when using CPU profile separation.


Only consider profiles for the given task groups. Unless some program is using threads, the task group ID of a process is the same as its process ID. This option corresponds to the POSIX notion of a thread group. This is only useful when using per-process profile separation.


Only consider profiles for the given threads. When using recent thread libraries, all threads in a process share the same task group ID, but have different thread IDs. You can use this option in combination with tgid: to restrict the results to particular threads within a process. This is only useful when using per-process profile separation.


No special environment variables are recognized by OProfile.



OProfile user guide.


Schema file for opreport XML output.


Schema file for ophelp XML output.


Event description files used by OProfile.


The profiler log file.


The location of the generated sample files.


This man page is current for oprofile-1.2.0.

See Also

/usr/share/doc/oprofile/, operf(1), ocount(1), opreport(1), opannotate(1), oparchive(1), opgprof(1), gprof(1), CPU vendor architecture manuals


John Levon <levon@movementarian.org> is the primary author. See the documentation for other contributors.

Referenced By

get_hugepage_region(3), get_huge_pages(3), gethugepagesizes(3), getpagesizes(3), hugeadm(8), hugectl(8), hugeedit(8), libhugetlbfs(7), lookup_dcookie(2), opannotate(1), oparchive(1), op-check-perfevents(1), opgprof(1), ophelp(1), opimport(1), opreport(1), pagesize(1).

Thu 08 February 2018 oprofile 1.2.0