projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 30ec772c PP |
1 | lttng-start(1) |
| 2 | ============== | |
| 4605890e | 3 | :revdate: 7 April 2016 |
| 30ec772c PP |
4 | |
| 5 | ||
| 6 | NAME | |
| 7 | ---- | |
| 8 | lttng-start - Start LTTng tracers | |
| 9 | ||
| 10 | ||
| 11 | SYNOPSIS | |
| 12 | -------- | |
| 13 | [verse] | |
| ce19b9ed | 14 | *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *start* ['SESSION'] |
| 30ec772c PP |
15 | |
| 16 | ||
| 17 | DESCRIPTION | |
| 18 | ----------- | |
| 19 | The `lttng start` command starts the various LTTng tracers for a | |
| 20 | given inactive tracing session. | |
| 21 | ||
| 22 | Starting the LTTng tracers has the effect that all enabled event rules | |
| 23 | within enabled channels can make their target event sources _emit_ trace | |
| 24 | events. Whether they are recorded to the local file system, sent over | |
| 25 | the network, or not recorded at all depends on the specific | |
| 26 | configuration of the tracing session in which tracing is started. See | |
| 7c1a4458 | 27 | man:lttng-create(1) for different session modes. |
| 30ec772c PP |
28 | |
| 29 | A tracing session with running tracers is said to be _active_. Active | |
| 30 | tracing sessions can return to the inactive state using the | |
| 7c1a4458 | 31 | man:lttng-stop(1) command. |
| 30ec772c PP |
32 | |
| 33 | If 'SESSION' is omitted, the LTTng tracers are started for the current | |
| 7c1a4458 | 34 | tracing session (see man:lttng-create(1) for more information |
| 30ec772c PP |
35 | about the current tracing session). Otherwise, they are started for the |
| 36 | existing tracing session named 'SESSION'. `lttng list` | |
| 7c1a4458 | 37 | outputs all the existing tracing sessions (see man:lttng-list(1)). |
| 30ec772c PP |
38 | |
| 39 | ||
| 40 | include::common-cmd-options-head.txt[] | |
| 41 | ||
| 42 | ||
| 43 | include::common-cmd-help-options.txt[] | |
| 44 | ||
| 45 | ||
| 46 | include::common-cmd-footer.txt[] | |
| 47 | ||
| 48 | ||
| 49 | SEE ALSO | |
| 50 | -------- | |
| 7c1a4458 PP |
51 | man:lttng-stop(1), |
| 52 | man:lttng(1) |