lttng-stop(1) ============= :revdate: 18 January 2018 NAME ---- lttng-stop - Stop LTTng tracers SYNOPSIS -------- [verse] *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *stop* [option:--no-wait] ['SESSION'] DESCRIPTION ----------- 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 man:lttng-start(1) command. If 'SESSION' is omitted, the LTTng tracers are stopped for the current tracing session (see man: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 man: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 option:--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 man:lttng-rotate(1) and man: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 man:lttng-start(1)), it is :not: a trace chunk archive: you need to destroy the tracing session with man:lttng-destroy(1) or make a rotation with man:lttng-rotate(1) to archive it. include::common-cmd-options-head.txt[] option:-n, option:--no-wait:: Do not ensure that the chosen tracing session's trace data is valid before returning to the prompt. include::common-cmd-help-options.txt[] include::common-cmd-footer.txt[] SEE ALSO -------- man:lttng-start(1), man:lttng(1)