ophelp(1) — Linux manual page

OPHELP(1)                General Commands Manual                OPHELP(1)

NAME         top

       ophelp - list OProfile events

SYNOPSIS         top

       ophelp [ options ] [event name]

DESCRIPTION         top

       By default, ophelp lists the available performance counter
       options. If you give it a symbolic event name, it will return the
       hardware value (e.g. "ophelp DATA_MEM_REFS").

OPTIONS         top

       --cpu-type / -c
              Show the events for the given numerical CPU type.

       --get-cpu-type / -r
              Show the symbolic CPU name.

       --get-default-event / -d
              Show the default event for the specified CPU type.

       --check-events / -e [events]
              Check the given space-separated event descriptions for
              validity.  If the events are valid, show which pmu counter
              each event would be assigned to.

       --callgraph [callgraph_depth]
              Use the callgraph depth to compute the higher minimum
              sampling intervals for the events.

       --unit-mask / -u [event]
              Show the default unit mask for the given event.

       --extra-mask / -E [event]
              Show the extra unit mask for given event.

       --xml / -X
              List events in XML format.

       --help / -? / --usage
              Show help message.

       --version / -v
              Show version.

ENVIRONMENT         top

       No special environment variables are recognised by ophelp.

FILES         top

       $prefix/share/oprofile/
              Event description files used by OProfile.

VERSION         top

       This man page is current for oprofile-1.5.0git.

SEE ALSO         top

       /usr/local/share/doc/oprofile/, oprofile(1)

COLOPHON         top

       This page is part of the oprofile (a system-wide profiler for
       Linux) project.  Information about the project can be found at 
       ⟨http://oprofile.sourceforge.net/news/⟩.  If you have a bug report
       for this manual page, see ⟨http://oprofile.sourceforge.net/bugs/⟩.
       This page was obtained from the project's upstream Git repository
       ⟨git://git.code.sf.net/p/oprofile/oprofile⟩ on 2025-08-11.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2024-12-10.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

4th Berkeley Distribution   Mon 11 August 2025                  OPHELP(1)

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