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

       git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/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

                                            01/29/2014                          TRACE-CMD-HIST(1)