Manual: trace-cmd-hist

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 "".

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, 

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

libtracefs						 01/22/2026					   TRACE-CMD-HIST(1)