trace-cmd-hist(1) — Linux manual page

TRACE-CMD-HIST(1)           libtracefs Manual          TRACE-CMD-HIST(1)

NAME

       trace-cmd-hist - show histogram of events in trace.dat file

SYNOPSIS

       trace-cmd hist [OPTIONS][input-file]

DESCRIPTION

       The trace-cmd(1) hist displays a histogram form from the
       trace.dat file. Instead of showing the events as they were
       ordered, it creates a histogram that can be displayed per task or
       for all tasks where the most common events appear first. It uses
       the function tracer and call stacks that it finds to try to put
       together a call graph of the events.

OPTIONS

       -i input-file
           By default, trace-cmd hist will read the file trace.dat. But
           the -i option open up the given input-file instead. Note, the
           input file may also be specified as the last item on the
           command line.

       -P
           To compact all events and show the call graphs by ignoring
           tasks and different PIDs, add the -P to do so. Instead of
           showing the task name, it will group all chains together and
           show "<all pids>".

SEE ALSO

       trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1),
       trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1),
       trace-cmd-reset(1), trace-cmd-split(1), trace-cmd-listen(1)

AUTHOR

       Written by Steven Rostedt, <rostedt@goodmis.org[1]>

RESOURCES

       https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/ 

COPYING

       Copyright (C) 2010 Red Hat, Inc. Free use of this software is
       granted under the terms of the GNU Public License (GPL).

NOTES

        1. rostedt@goodmis.org
           mailto:rostedt@goodmis.org

COLOPHON

       This page is part of the trace-cmd (a front-end for Ftrace)
       project.  Information about the project can be found at 
       ⟨https://www.trace-cmd.org/⟩.  If you have a bug report for this
       manual page, see ⟨https://www.trace-cmd.org/⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git⟩ on
       2024-06-14.  (At that time, the date of the most recent commit
       that was found in the repository was 2024-02-22.)  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

libtracefs                     09/24/2023              TRACE-CMD-HIST(1)

Pages that refer to this page: trace-cmd(1), trace-cmd-mem(1)

---