NAME

       lttng-disable-event - Disable LTTng event rules

SYNOPSIS

       lttng [GENERAL OPTIONS] disable-event
             (--kernel [--probe | --function | --syscall] |
              --userspace | --jul | --log4j | --python)
             [--session=SESSION] [--channel=CHANNEL]
             (--all-events | EVENT[,EVENT]...)

DESCRIPTION

       The lttng disable-event command disables one or more event rules previously enabled by the
       lttng-enable-event(1) command.

       Event rules are always assigned to a channel when they are created. If the --channel
       option is omitted, the default channel named channel0 is used.

       If the --session option is omitted, the chosen channel is picked from the current tracing
       session.

       If the --all-events option is used, all the existing event rules of the chosen domain are
       disabled. Otherwise, at least one event rule to disable named EVENT must be specified.

       With the --kernel option, the event source type can be specified using one of the
       --tracepoint, --probe, --function, or --syscall options. See lttng-enable-event(1) for
       more details about event source types.

       Events can be disabled while tracing is active (use lttng-start(1) to make a tracing
       session active).

OPTIONS

       General options are described in lttng(1).

   Domain
       One of:

       -j, --jul
           Disable event rules in the java.util.logging (JUL) domain.

       -k, --kernel
           Disable event rules in the Linux kernel domain.

       -l, --log4j
           Disable event rules in the Apache log4j domain.

       -p, --python
           Disable event rules in the Python domain.

       -u, --userspace
           Disable event rules in the user space domain.

   Target
       -c CHANNEL, --channel=CHANNEL
           Disable event rules in the channel named CHANNEL instead of the default channel name
           channel0.

       -s SESSION, --session=SESSION
           Disable event rules in the tracing session named SESSION instead of the current
           tracing session.

   Event source type
       One of:

       --function
           Linux kernel kretprobe. Only available with the --kernel domain option.

       --probe
           Linux kernel kprobe. Only available with the --kernel domain option.

       --syscall
           Linux kernel system call. Only available with the --kernel domain option.

       --tracepoint
           Linux kernel or application tracepoint. Only available with the --kernel domain option
           (default Linux kernel domain event source type).

   Disabling
       -a, --all-events
           Disable all enabled event rules in the chosen tracing session, tracing domain, and
           channel.

   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-options
           List available command options.

ENVIRONMENT VARIABLES

       LTTNG_ABORT_ON_ERROR
           Set to 1 to abort the process after the first error is encountered.

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

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

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

       LTTNG_SESSIOND_PATH
           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

       $LTTNG_HOME/.lttngrc
           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.

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

       $LTTNG_HOME/.lttng
           User LTTng runtime and configuration directory.

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

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

           Note
           $LTTNG_HOME defaults to $HOME when not explicitly set.

EXIT STATUS

       0
           Success

       1
           Command error

       2
           Undefined command

       3
           Fatal error

       4
           Command warning (something went wrong during the command)

BUGS

       If you encounter any issue or usability problem, please report it on the LTTng bug tracker
       <https://bugs.lttng.org/projects/lttng-tools>.

RESOURCES

       •   LTTng project website <http://lttng.org>

       •   LTTng documentation <http://lttng.org/docs>

       •   Git repositories <http://git.lttng.org>

       •   GitHub organization <http://github.com/lttng>

       •   Continuous integration <http://ci.lttng.org/>

       •   Mailing list <http://lists.lttng.org> for support and development: lttng-
           dev@lists.lttng.org

       •   IRC channel <irc://irc.oftc.net/lttng>: #lttng on irc.oftc.net

COPYRIGHTS

       This program is part of the LTTng-tools project.

       LTTng-tools is distributed under the GNU General Public License version 2
       <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>. See the LICENSE
       <https://github.com/lttng/lttng-tools/blob/master/LICENSE> file for details.

THANKS

       Special thanks to Michel Dagenais and the DORSAL laboratory
       <http://www.dorsal.polymtl.ca/> 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

       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
       <mailto:jeremie.galarneau@efficios.com>.

SEE ALSO

       lttng-enable-event(1), lttng(1)