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perf-data(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | COMMANDS | OPTIONS FOR CONVERT | SEE ALSO | COLOPHON 

PERF-DATA(1)                   perf Manual                   PERF-DATA(1)

NAME         top

       perf-data - Data file related processing

SYNOPSIS         top

       perf data [<common options>] <command> [<options>]",

DESCRIPTION         top

       Data file related processing.

COMMANDS         top

       convert
           Converts perf data file into another format. It’s possible to
           set data-convert debug variable to get debug messages from
           conversion, like: perf --debug data-convert data convert ...

OPTIONS FOR CONVERT         top

       --to-ctf
           Triggers the CTF conversion, specify the path of CTF data
           directory.

       --to-json
           Triggers JSON conversion. Specify the JSON filename to output.

       --tod
           Convert time to wall clock time.

       -i
           Specify input perf data file path.

       -f, --force
           Don’t complain, do it.

       --time
           Only convert samples within given time window: <start>,<stop>.
           Times have the format seconds.nanoseconds. If start is not
           given (i.e. time string is ,x.y) then analysis starts at the
           beginning of the file. If stop time is not given (i.e. time
           string is x.y,) then analysis goes to end of file. Multiple
           ranges can be separated by spaces, which requires the argument
           to be quoted e.g. --time "1234.567,1234.789 1235,"

               Also support time percent with multiple time ranges. Time string is
               'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'.

               For example:
               Select the second 10% time slice:

               perf data convert --to-json out.json --time 10%/2

               Select from 0% to 10% time slice:

               perf data convert --to-json out.json --time 0%-10%

               Select the first and second 10% time slices:

               perf data convert --to-json out.json --time 10%/1,10%/2

               Select from 0% to 10% and 30% to 40% slices:

               perf data convert --to-json out.json --time 0%-10%,30%-40%

       -v, --verbose
           Be more verbose (show counter open errors, etc).

       --all
           Convert all events, including non-sample events (comm, fork,
           ...), to output. Default is off, only convert samples.

SEE ALSO         top

       perf(1) [1] Common Trace Format - http://www.efficios.com/ctf

COLOPHON         top

       This page is part of the perf (Performance analysis tools for
       Linux (in Linux source tree)) project.  Information about the
       project can be found at 
       ⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩.  If you have a
       bug report for this manual page, send it to
       linux-kernel@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩
       on 2026-05-24.  (At that time, the date of the most recent commit
       that was found in the repository was 2026-05-23.)  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

perf                            2026-01-06                   PERF-DATA(1)

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