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, <[email protected][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. [email protected]
       mailto:[email protected]

                              07/17/2016                 TRACE-CMD-HIST(1)

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