$
lttng disable-channel --kernel my-channel
lttng-disable-channel — Disable LTTng channels
lttng [GENERAL OPTIONS] disable-channel (--kernel|--userspace) [--session=SESSION]CHANNEL[,CHANNEL]…
The lttng disable-channel command disables one or more channels
previously enabled with the lttng-enable-channel(1) command
which belong to:
--session=SESSION option
The recording session named SESSION.
--session option
The current recording session (see lttng-concepts(7) to learn more about the current recording session).
See lttng-concepts(7) to learn more about channels.
The disable-channel command disables one channel per CHANNEL
argument.
As of LTTng 2.14, you may not enable a disabled channel once its recording session has been started (see lttng-start(1)) at least once.
See the “EXAMPLES” section below for usage examples.
See lttng(1) for GENERAL OPTIONS.
One of:
-k, --kernel
Disable one or more Linux kernel channels.
-u, --userspace
Disable one or more user space channels.
-h, --help
Show help.
This option attempts to launch /usr/bin/man to view this manual page.
Override the manual pager path with the LTTNG_MAN_BIN_PATH environment
variable.
--list-options
List available command options and quit.
Success
Command error
Undefined command
Fatal error
Command warning (something went wrong during the command)
LTTNG_ABORT_ON_ERROR
Set to 1 to abort the process after the first error is
encountered.
LTTNG_HOME
Path to the LTTng home directory.
Defaults to $HOME.
Useful when the Unix user running the commands has a non-writable home directory.
LTTNG_MAN_BIN_PATH
Absolute path to the manual pager to use to read the LTTng
command-line help (with lttng-help(1) or with the
--help option) instead of /usr/bin/man.
LTTNG_SESSION_CONFIG_XSD_PATH
Path to the directory containing the session.xsd recording session
configuration XML schema.
LTTNG_SESSIOND_PATH
Absolute path to the LTTng session daemon binary (see lttng-sessiond(8)) to spawn from the lttng-create(1) command.
The --sessiond-path general option overrides this environment
variable.
$LTTNG_HOME/.lttngrc
Unix user’s LTTng runtime configuration.
This is where LTTng stores the name of the Unix user’s current recording session between executions of lttng(1). lttng-create(1) and lttng-set-session(1) set the current recording session.
$LTTNG_HOME/lttng-traces
Default output directory of LTTng traces in local and snapshot modes.
Override this path with the --output option of the
lttng-create(1) command.
$LTTNG_HOME/.lttng
Unix user’s LTTng runtime and configuration directory.
$LTTNG_HOME/.lttng/sessions
Default directory containing the Unix user’s saved recording session configurations (see lttng-save(1) and lttng-load(1)).
/etc/lttng/sessions
Directory containing the system-wide saved recording session configurations (see lttng-save(1) and lttng-load(1)).
Note:$LTTNG_HOME defaults to the value of the HOME environment
variable.
Example:Disable one Linux kernel channel of the current recording session.
$
lttng disable-channel --kernel my-channel
Example:Disable two user space channels of a specific recording session.
See the --session option.
$
lttng disable-channel --kernel --session=my-session \
little,box
Mailing list for support and
development: lttng-dev@lists.lttng.org
IRC channel: #lttng on irc.oftc.net
This program is part of the LTTng-tools project.
LTTng-tools is distributed under the
GNU General
Public License version 2. See the
LICENSE file
for details.
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.