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)

       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 valid.

       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

       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

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) command.

           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 <>.
       See the LICENSE <
       tools/blob/master/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

       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)