projects / lttng-docs.git / blame
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| 5e0cbfb0 PP |
1 | --- |
| 2 | id: plumbing-overview | |
| 3 | --- | |
| 4 | ||
| 5 | As [mentioned previously](#doc-installing-lttng), the whole LTTng suite | |
| 6 | is made of the following packages: LTTng-tools, LTTng-UST, and | |
| 7 | LTTng-modules. Together, they provide different daemons, libraries, | |
| 8 | kernel modules and command line interfaces. The following tree shows | |
| 9 | which usable component belongs to which package: | |
| 10 | ||
| 11 | * **LTTng-tools**: | |
| 12 | * session daemon (`lttng-sessiond`) | |
| 13 | * consumer daemon (`lttng-consumerd`) | |
| 14 | * relay daemon (`lttng-relayd`) | |
| 15 | * tracing control library (`liblttng-ctl`) | |
| 16 | * tracing control command line tool (`lttng`) | |
| 17 | * **LTTng-UST**: | |
| 18 | * user space tracing library (`liblttng-ust`) and its headers | |
| 19 | * preloadable user space tracing helpers | |
| 20 | (`liblttng-ust-libc-wrapper`, `liblttng-ust-pthread-wrapper`, | |
| 21 | `liblttng-ust-cyg-profile`, `liblttng-ust-cyg-profile-fast` | |
| 22 | and `liblttng-ust-dl`) | |
| 23 | * user space tracepoint code generator command line tool | |
| 24 | (`lttng-gen-tp`) | |
| 25 | * Java Util Logging tracepoint provider (`liblttng-ust-jul-jni`) | |
| 26 | and JAR file (`liblttng-ust-jul.jar`) | |
| 27 | * **LTTng-modules**: | |
| 28 | * LTTng Linux kernel tracer module | |
| 29 | * tracing ring buffer kernel modules | |
| 30 | * many LTTng probe kernel modules | |
| 31 | ||
| 32 | The following diagram shows how the most important LTTng components | |
| 33 | interact. Plain black arrows represent trace data paths while dashed | |
| 34 | red arrows indicate control communications. The LTTng relay daemon is | |
| 35 | shown running on a remote system, although it could as well run on the | |
| 36 | target (monitored) system. | |
| 37 | ||
| 38 | <div class="img img-90"> | |
| 39 | <object data="/images/docs/plumbing.svg" type="image/svg+xml"> | |
| 40 | <img src="/images/docs/plumbing.svg"> | |
| 41 | </object> | |
| 42 | </div> | |
| 43 | ||
| 44 | Each component is described in the following subsections. |