LTTNG-LIST(1) | LTTng Manual | LTTNG-LIST(1) |
lttng-list - List LTTng tracing sessions, domains, channels, and events
List existing tracing sessions:
lttng [GENERAL OPTIONS] list
List available event sources:
lttng [GENERAL OPTIONS] list [--fields]
[--kernel [--syscall]] [--userspace] [--jul] [--log4j] [--python]
List tracing session’s domains:
lttng [GENERAL OPTIONS] list --domain SESSION
List tracing session’s channels and event rules:
lttng [GENERAL OPTIONS] list [--channel=CHANNEL] SESSION
The lttng list command lists tracing sessions, tracing domains, channels, and events.
Without arguments, lttng list lists the existing tracing sessions and shows if they are active or not.
With one or more of the --kernel, --userspace, --jul, --log4j, and --python domain options, the command lists the available event sources of the selected domain on the system. The JUL, log4j, and Python domains list the names of their available loggers. The --syscall option can be used alongside the --kernel option to get a list of traceable Linux system calls. The --fields option can be used to show the fields of the listed event sources.
Providing a tracing session name SESSION targets a specific tracing session. If the --domain option is used, domains containing at least one channel in the selected tracing session are listed. Otherwise, all the domains, channels, and event rules of the selected tracing session are listed along with its details (trace path, for example), except when the --channel option is used to isolate a specific channel by name.
General options are described in lttng(1).
-j, --jul
-k, --kernel
-l, --log4j
-p, --python
-u, --userspace
-c CHANNEL, --channel=CHANNEL
-d, --domain
-f, --fields
--syscall
-h, --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
LTTNG_ABORT_ON_ERROR
LTTNG_HOME
LTTNG_MAN_BIN_PATH
LTTNG_SESSION_CONFIG_XSD_PATH
LTTNG_SESSIOND_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.
$LTTNG_HOME/.lttngrc
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
$LTTNG_HOME/.lttng
$LTTNG_HOME/.lttng/sessions
/etc/lttng/sessions
$LTTNG_HOME defaults to $HOME when not explicitly set.
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If you encounter any issue or usability problem, please report it on the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-tools>.
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.
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.
28 November 2016 | LTTng 2.12.3 |