lttng-stop(1) — Linux manual page


LTTNG-STOP(1)                 LTTng Manual                 LTTNG-STOP(1)

NAME         top

       lttng-stop - Stop LTTng tracers

SYNOPSIS         top

       lttng [GENERAL OPTIONS] stop [--no-wait] [SESSION]

DESCRIPTION         top

       The lttng stop command stops the various LTTng tracers for a
       given active tracing session.

       Stopping the LTTng tracers has the effect that all enabled event
       rules within enabled channels cannot make event sources emit
       trace events anymore.

       A tracing session with no running tracers is said to be inactive.
       Inactive tracing sessions can be set active using the
       lttng-start(1) command.

       If SESSION is omitted, the LTTng tracers are stopped for the
       current tracing session (see lttng-create(1) for more information
       about the current tracing session). Otherwise, they are stopped
       for the existing tracing session named SESSION. lttng list
       outputs all the existing tracing sessions (see lttng-list(1)).

       By default, the lttng stop command ensures that the tracing
       session’s trace data is valid before returning to the prompt.
       With the --no-wait option, the command finishes immediately,
       hence a local trace might not be valid when the command is done.
       In this case, there is no way to know when the trace becomes

       If at least one rotation occurred during the chosen tracing
       session’s lifetime (see lttng-rotate(1) and
       lttng-enable-rotation(1)), the lttng stop command renames the
       current trace chunk subdirectory and prints the renamed path.
       Although it is safe to read the content of this renamed
       subdirectory while the tracing session remains inactive (until
       the next lttng-start(1)), it is NOT a trace chunk archive: you
       need to destroy the tracing session with lttng-destroy(1) or make
       a rotation with lttng-rotate(1) to archive it.

OPTIONS         top

       General options are described in lttng(1).

       -n, --no-wait
           Do not ensure that the chosen tracing session’s trace data is
           valid before returning to the prompt.

   Program information
       -h, --help
           Show command help.

           This option, like lttng-help(1), attempts to launch
           /usr/bin/man to view the command’s man page. The path to the
           man pager can be overridden by the LTTNG_MAN_BIN_PATH
           environment variable.

           List available command options.


           Set to 1 to abort the process after the first error is

           Overrides the $HOME environment variable. Useful when the
           user running the commands has a non-writable home directory.

           Absolute path to the man pager to use for viewing help
           information about LTTng commands (using lttng-help(1) or
           lttng COMMAND --help).

           Path in which the session.xsd session configuration XML
           schema may be found.

           Full session daemon binary path.

           The --sessiond-path option has precedence over this
           environment variable.

       Note that the lttng-create(1) command can spawn an LTTng session
       daemon automatically if none is running. See lttng-sessiond(8)
       for the environment variables influencing the execution of the
       session daemon.

FILES         top

           User LTTng runtime configuration.

           This is where the per-user current tracing session is stored
           between executions of lttng(1). The current tracing session
           can be set with lttng-set-session(1). See lttng-create(1) for
           more information about tracing sessions.

           Default output directory of LTTng traces. This can be
           overridden with the --output option of the lttng-create(1)

           User LTTng runtime and configuration directory.

           Default location of saved user tracing sessions (see
           lttng-save(1) and lttng-load(1)).

           System-wide location of saved tracing sessions (see
           lttng-save(1) and lttng-load(1)).


           $LTTNG_HOME defaults to $HOME when not explicitly set.

EXIT STATUS         top


           Command error

           Undefined command

           Fatal error

           Command warning (something went wrong during the command)

BUGS         top

       If you encounter any issue or usability problem, please report it
       on the LTTng bug tracker <

RESOURCES         top

       •   LTTng project website <>

       •   LTTng documentation <>

       •   Git repositories <>

       •   GitHub organization <>

       •   Continuous integration <>

       •   Mailing list <> for support and

       •   IRC channel <irc://>: #lttng on

COPYRIGHTS         top

       This program is part of the LTTng-tools project.

       LTTng-tools is distributed under the GNU General Public License
       version 2 <
       licenses/gpl-2.0.en.html>. See the LICENSE
       <> file
       for details.

THANKS         top

       Special thanks to Michel Dagenais and the DORSAL laboratory
       <> at École Polytechnique de
       Montréal for the LTTng journey.

       Also thanks to the Ericsson teams working on tracing which helped
       us greatly with detailed bug reports and unusual test cases.

AUTHORS         top

       LTTng-tools was originally written by Mathieu Desnoyers, Julien
       Desfossez, and David Goulet. More people have since contributed
       to it.

       LTTng-tools is currently maintained by Jérémie Galarneau

SEE ALSO         top

       lttng-start(1), lttng(1)

COLOPHON         top

       This page is part of the LTTng-Tools (    LTTng tools) project.
       Information about the project can be found at 
       ⟨⟩.  It is not known how to report bugs for this
       man page; if you know, please send a mail to
       This page was obtained from the project's upstream Git repository
       ⟨git://⟩ on 2019-11-19.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2019-11-14.)  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

LTTng 2.12.0-pre               10/29/2018                  LTTNG-STOP(1)

Pages that refer to this page: lttng(1)lttng-destroy(1)lttng-enable-channel(1)lttng-rotate(1)lttng-snapshot(1)lttng-start(1)