README.md

   1 LTTng-tools
   2 ===========
   3
   4 LTTng-tools is a set of tools to control [LTTng](https://lttng.org/)
   5 tracing. The project includes the LTTng session daemon, consumer damon
   6 and relay daemon, as well as `liblttng-ctl`, a C library used to
   7 communicate with the session daemon, and `lttng`, a command line
   8 interface to `liblttng-ctl`.
   9
  10
  11 Requirements and optional dependencies
  12 --------------------------------------
  13
  14 The following items are _required_ to build and run LTTng-tools
  15 components:
  16
  17   - **Linux kernel >= 2.6.27**: for `epoll()` support, at least this
  18     version is needed. However, `poll()` is also supported by
  19     configuring LTTng-tools with the `--disable-epoll` option. Using
  20     that, the kernel version may probably be older, but we can't provide
  21     any guarantee. Please let us know if you are able to go lower
  22     without any problems.
  23   - **[`liburcu`](http://urcu.so/) >= 0.8.0**: userspace RCU library,
  24     by Mathieu Desnoyers and Paul E. McKenney.
  25   - **`libpopt` >= 1.13**:  command line arguments parsing library.
  26     - Debian/Ubuntu package: `libpopt-dev`
  27   - **`libuuid`**: universally unique ID library
  28     - Debian/Ubuntu package: `uuid-dev`
  29   - **`libxml2` >= 2.7.6**:  XML document parsing library. Needed for
  30     tracing session configuration saving/loading and machine interface
  31     output support.
  32     - Debian/Ubuntu package: `libxml2-dev`
  33
  34
  35 The following items are _optional_ dependencies:
  36
  37   - **[Babeltrace](https://lttng.org/babeltrace)**: trace viewer.
  38     Enables the use of `lttng view` command.
  39     - Debian/Ubuntu package: `babeltrace`
  40   - **Perl**: needed for `make check` and tests.
  41   - **Python >= 3.0**: needed for `make check` and tests.
  42     - Debian/Ubuntu package: `python3`
  43   - **SWIG >= 2.0** and **Python 3 development headers**: needed for
  44     Python bindings
  45     (enabled at configure time with the `--enable-python-bindings` option).
  46     - Debian/Ubuntu packages: `swig2.0` and `python3-dev`
  47   - **modprobe**: needed for automatic LTTng kernel modules loading
  48     (kernel tracing).
  49   - **bash**: needed for running `make check`.
  50
  51
  52 Building
  53 --------
  54
  55 This source tree is based on the Autotools suite from GNU to simplify
  56 portability. Here are some things you should have on your system in
  57 order to compile the Git repository tree:
  58
  59   - GNU Autotools (Automake >= 1.10, Autoconf >= 2.50,
  60     Autoheader >= 2.50; make sure your system-wide `automake` points to
  61     a recent version!)
  62   - [GNU Libtool](http://www.gnu.org/software/autoconf/) >= 2.2
  63   - Flex >= 2.5.35
  64   - Bison >= 2.4
  65
  66 If you use GNU gold, which is _not_ mandatory, make sure you have this
  67 version:
  68
  69   - GNU gold >= 2.22
  70
  71 Before this version of GNU gold, we hit a
  72 [known bug](http://sourceware.org/bugzilla/show_bug.cgi?id=11317).
  73 Be advised that with GNU gold, you might have to specify
  74 `-L/usr/local/lib` in `LDFLAGS`.
  75
  76 If you get the tree from the Git repository, you will need to run
  77
  78     ./bootstrap
  79
  80 in its root. It calls all the GNU tools needed to prepare the tree
  81 configuration.
  82
  83 To build LTTng-tools, do:
  84
  85     ./configure
  86     make
  87     sudo make install
  88     sudo ldconfig
  89
  90 If you want Python bindings, add the `--enable-python-bindings` option
  91 to `configure`. Please note that some distributions will need the
  92 following environment variables set before running configure:
  93
  94     export PYTHON="python3"
  95     export PYTHON_CONFIG="/usr/bin/python3-config"
  96
  97
  98 Using
  99 -----
 100
 101 Please see [`doc/quickstart.txt`](doc/quickstart.txt) to get started
 102 with LTTng tracing. You can also use the `-h` or `--help` option of
 103 any `lttng` command, e.g.:
 104
 105     lttng enable-event --help
 106
 107 A network streaming HOWTO can be found in
 108 [`doc/streaming-howto.txt`](doc/streaming-howto.txt) which quickly
 109 helps you understand how to stream a LTTng 2.x trace.
 110
 111 A Python binding HOWTO can be found in
 112 [`doc/python-howto.txt`](doc/python-howto.txt) which quickly helps you
 113 understand how to use the Python module to control LTTng.
 114
 115
 116 Contact
 117 -------
 118
 119 Maintainer: [Jérémie Galarneau](mailto:jeremie.galarneau@efficios.com)
 120
 121 Mailing list: [`lttng-dev@lists.lttng.org`](https://lttng.org/cgi-bin/mailman/listinfo/lttng-dev)
 122
 123
 124 Package contents
 125 ----------------
 126
 127 This package contains the following elements:
 128
 129   - `doc`: LTTng-tools documentation.
 130   - `include`: the public header files that will be installed on the system.
 131   - `src/bin`: source code of LTTng-tools programs.
 132     - `lttng-consumerd`: consumer daemon.
 133     - `lttng-relayd`: relay daemon.
 134     - `lttng-sessiond`: session daemon.
 135     - `lttng`: command line interface for LTTng tracing control.
 136   - `src/common`: common LTTng-tools source code.
 137     - `compat`: compatibility library mostly for FreeBSD and Linux.
 138     - `config`: tracing session configuration saving/loading.
 139     - `hashtable`: library wrapper over Userspace RCU hashtables.
 140     - `health`: health check subsytem.
 141     - `index`: CTF index utilities.
 142     - `kernel-consumer`: Linux kernel consumer.
 143     - `kernel-ctl`: Linux kernel tracer control.
 144     - `relayd`: relay daemon control.
 145     - `sessiond-comm`: session daemon communication.
 146     - `ust-consumer`: user space consumer.
 147   - `src/lib`: source code of LTTng-tools libraries.
 148     - `lttng-ctl`: LTTng control library.
 149   - `tests`: various test programs.