lttng-stop — Stop an LTTng recording session
lttng stop command stops a recording session, that is, it
deactivates the LTTng tracers for:
The recording session named
The current recording session (see lttng-concepts(7) to learn more about the current recording session).
See lttng-concepts(7) to learn more about recording sessions.
stop-session trigger action can also stop a recording session (see
Start an inactive recording session with the lttng-start(1) command.
By default, the
stop command ensures that the trace data of the
selected recording session is valid before it exits. Make the command
exit immediately with the
--no-wait option. In this case,
however, the traces(s) might not be valid when the command exits, and
there’s no way to know when it/they becomes valid.
If LTTng archived the current trace chunk (see lttng-rotate(1) and
lttng-enable-rotation(1)) of the selected recording session at least
once during its lifetime, the
stop command renames the current trace
chunk subdirectory and prints the renamed path. Although it’s safe to
read the content of this renamed subdirectory while the recording
session remains inactive, it’s not a trace chunk archive: you need to
destroy the recording session with lttng-destroy(1) or perform a
rotation with lttng-rotate(1) to archive it.
See the “EXAMPLES” section below for usage examples.
Command warning (something went wrong during the command)
1 to abort the process after the first error is
Path to the LTTng home directory.
Useful when the Unix user running the commands has a non-writable home directory.
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
Path to the directory containing the
session.xsd recording session
configuration XML schema.
--sessiond-path general option overrides this environment
Unix user’s LTTng runtime configuration.
Default output directory of LTTng traces in local and snapshot modes.
Override this path with the
--output option of the
Unix user’s LTTng runtime and configuration directory.
$LTTNG_HOME defaults to the value of the
Example:Stop the current recording session.
Example:Stop a specific recording session.
lttng stop my-session
Example:Stop the current recording session without waiting for completion.
lttng stop --no-wait
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.