projects / lttng-docs.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e0cbfb0 PP |
1 | --- |
| 2 | id: controlling-tracing | |
| 3 | --- | |
| 4 | ||
| 5 | Once you're in possession of a software that is properly | |
| 6 | [instrumented](#doc-instrumenting) for LTTng tracing, be it thanks to | |
| 7 | the built-in LTTng probes for the Linux kernel, a custom user | |
| 4fa8dc1e PP |
8 | application, or a custom Linux kernel, all that is left is actually |
| 9 | tracing it. | |
| 5e0cbfb0 | 10 | |
| 4fa8dc1e PP |
11 | You control LTTng tracing using a single command |
| 12 | line tool: `lttng`. LTTng [session daemons](#doc-lttng-sessiond) may | |
| 13 | either be started manually (`lttng-sessiond`) or automatically by the | |
| 14 | `lttng` command when a sessions is created. Trace data may be forwarded | |
| 15 | to the network and used elsewhere using an LTTng | |
| 16 | [relay daemon](#doc-lttng-relayd) (`lttng-relayd`). | |
| 17 | ||
| 18 | The man pages of `lttng`, `lttng-sessiond`, and `lttng-relayd` are pretty | |
| 5e0cbfb0 PP |
19 | complete, thus this section is not an online copy of the latter (we |
| 20 | leave this contents for the | |
| 5037eb52 | 21 | [Online LTTng man pages](#doc-online-lttng-manpages) section). |
| 5e0cbfb0 PP |
22 | This section is rather a tour of LTTng |
| 23 | features through practical examples and tips. | |
| 24 | ||
| 25 | If not already done, make sure you understand the core concepts | |
| 26 | and how LTTng components connect together by reading the | |
| 27 | [Understanding LTTng](#doc-understanding-lttng) chapter; this section | |
| 28 | assumes you are familiar with them. |