TRACE-CMD(1)                                                    TRACE-CMD(1)

NAME         top

       trace-cmd - interacts with Ftrace Linux kernel internal tracer

SYNOPSIS         top

       trace-cmd COMMAND [OPTIONS]

DESCRIPTION         top

       The trace-cmd(1) command interacts with the Ftrace tracer that is
       built inside the Linux kernel. It interfaces with the Ftrace specific
       files found in the debugfs file system under the tracing directory. A
       COMMAND must be specified to tell trace-cmd what to do.

COMMANDS         top

           record  - record a live trace and write a trace.dat file to the
                     local disk or to the network.

           report  - reads a trace.dat file and converts the binary data to a
                     ASCII text readable format.

           hist    - show a histogram of the events.

           stat    - show tracing (ftrace) status of the running system

           options - list the plugin options that are available to *report*

           start   - start the tracing without recording to a trace.dat file.

           stop    - stop tracing (only disables recording, overhead of tracer
                     is still in effect)

           restart - restart tracing from a previous stop (only effects recording)

           extract - extract the data from the kernel buffer and create a trace.dat

           reset   - disables all tracing and gives back the system performance.
                     (clears all data from the kernel buffers)

           split   - splits a trace.dat file into smaller files.

           list    - list the available plugins or events that can be recorded.

           listen  - open up a port to listen for remote tracing connections.

           restore - restore the data files of a crashed run of trace-cmd record

           stack   - run and display the stack tracer

           check-events - parse format strings for all trace events and return
                          whether all formats are parseable

OPTIONS         top

       -h, --help
           Display the help text.

       Other options see the man page for the corresponding command.

SEE ALSO         top

       trace-cmd-record(1), trace-cmd-report(1), trace-cmd-hist(1),
       trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1),
       trace-cmd-reset(1), trace-cmd-restore(1), trace-cmd-stack(1),
       trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1),
       trace-cmd.dat(5), trace-cmd-check-events(1) trace-cmd-stat(1)

AUTHOR         top

       Written by Steven Rostedt, <[1]>

RESOURCES         top


COPYING         top

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

NOTES         top


COLOPHON         top

       This page is part of the trace-cmd (a front-end for Ftrace) project.
       Information about the project can be found at [unknown -- if you
       know, please contact] If you have a bug report for
       this manual page, send it to Steven Rostedt <>.
       This page was obtained from the project's upstream Git repository 
       on 2017-03-13.  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

                                 12/17/2015                     TRACE-CMD(1)