README.adoc

   1 // Render with Asciidoctor
   2
   3 :nbh: &#8209;
   4 :lt: LTTng{nbh}tools
   5 :lib: liblttng{nbh}ctl
   6
   7 ifdef::env-github[]
   8 :toc: macro
   9 endif::env-github[]
  10
  11 ifndef::env-github[]
  12 :toc: left
  13 endif::env-github[]
  14
  15 = {lt}
  16 5 May 2020
  17
  18 [.normal]
  19 https://ci.lttng.org/job/lttng-tools_master_build/[image:https://img.shields.io/jenkins/s/https/ci.lttng.org/lttng-tools_master_build.svg[Jenkins, title="Jenkins"]]
  20 https://scan.coverity.com/projects/lttng-tools[image:https://img.shields.io/coverity/scan/lttng-tools.svg[Coverity, title="Coverity"]]
  21
  22 [.lead]
  23 _**{lt}**_ is a set of components to control https://lttng.org/[LTTng]
  24 tracing.
  25
  26 The project includes:
  27
  28 * The LTTng https://lttng.org/man/8/lttng-sessiond/[session daemon].
  29
  30 * The LTTng consumer daemon.
  31
  32 * The LTTng https://lttng.org/man/8/lttng-relayd/[relay daemon].
  33
  34 * {lib}, a library with a C{nbsp}API used to communicate with
  35   the session daemon.
  36
  37 * Python{nbsp}3 bindings of liblttng{nbh}ctl.
  38
  39 * https://lttng.org/man/1/lttng/[`lttng`], a command-line tool over
  40   {lib}.
  41
  42 * https://lttng.org/man/1/lttng-crash/[`lttng{nbh}crash`], a command-line
  43   tool to recover and view LTTng{nbsp}2 trace buffers in the event of a
  44   crash.
  45
  46 ifdef::env-github[]
  47 toc::[]
  48 endif::env-github[]
  49
  50 == Required and optional dependencies
  51
  52 You need the following dependencies to build and run the {lt}
  53 components:
  54
  55 * **Linux kernel{nbsp}≥{nbsp}2.6.30**
  56
  57 * **http://www.liburcu.org/[Userspace{nbsp}RCU]{nbsp}≥{nbsp}0.11.0**.
  58 +
  59 Debian/Ubuntu package: `liburcu{nbh}dev`.
  60
  61 * **popt{nbsp}≥{nbsp}1.13**
  62 +
  63 Debian/Ubuntu package: `libpopt{nbh}dev`.
  64
  65 * **http://xmlsoft.org/[Libxml2]{nbsp}≥{nbsp}2.7.6**
  66 +
  67 Debian/Ubuntu package: `libxml2{nbh}dev`
  68
  69 The following dependencies are optional:
  70
  71 * **https://babeltrace.org/[Babeltrace{nbsp}2]**: default viewer
  72   of the https://lttng.org/man/1/lttng-view/[`lttng view`] command,
  73   `make{nbsp}check` and tests.
  74 +
  75 Debian/Ubuntu package: `babeltrace2`
  76
  77 * **https://lttng.org/[LTTng{nbh}UST]** (same minor version as {lt}):
  78   LTTng user space tracing (applications and libraries).
  79 +
  80 Debian/Ubuntu package: `liblttng{nbh}ust{nbh}dev`
  81
  82 * **Perl**: `make{nbsp}check` and tests.
  83
  84 * **https://www.python.org/[Python]{nbsp}≥{nbsp}3.0**:
  85   `make{nbsp}check` and tests.
  86 +
  87 Debian/Ubuntu package: `python3`
  88
  89 * **http://www.swig.org/[SWIG]{nbsp}≥{nbsp}2.0** and
  90   **Python{nbsp}3 development headers**: Python bindings
  91   (enabled at <<configure,build configuration>> time with the
  92   `{nbh}{nbh}enable{nbh}python{nbh}bindings` option).
  93 +
  94 Debian/Ubuntu packages: `swig2.0` and `python3{nbh}dev`
  95
  96 * **modprobe** and/or
  97   **https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/[kmod]{nbsp}≥{nbsp}22**:
  98   automatic LTTng kernel modules loading (kernel tracing).
  99
 100 * **Bash**: `make{nbsp}check`.
 101
 102 * **http://man7.org/linux/man-pages/man1/man.1.html[`man`]**
 103   (manual pager): view `lttng` command manual
 104   pages with the `{nbh}{nbh}help` option or with the
 105   https://lttng.org/man/1/lttng-help/[`lttng{nbsp}help`] command.
 106 +
 107 NOTE: You can use the <<configure,build configuration>> option
 108 `{nbh}{nbh}enable{nbh}embedded{nbh}help` to embed the manual pages into
 109 the `lttng`, `lttng{nbh}sessiond`, `lttng{nbh}relayd`, and
 110 `lttng{nbh}crash` programs so that you don't need `man` to view them.
 111
 112 * **http://perfmon2.sourceforge.net/[libpfm]{nbsp}≥{nbsp}4.0**:
 113   perf regression test suite.
 114 +
 115 Debian/Ubuntu package: `libpfm4-dev`
 116
 117 {lt} supports both the LTTng Linux kernel tracer and LTTng user space
 118 tracer sharing the same _minor_ version. While some minor releases do
 119 not change the tracer ABIs and _could_ work, no testing is performed to
 120 ensure that cross-version compatibility is maintained.
 121
 122 You don't need to rebuild or modify applications instrumented with older
 123 versions of the LTTng{nbh}UST project to make them work with the
 124 components of the latest {lt} release.
 125
 126 See the https://lttng.org/docs/[LTTng Documentation] for more
 127 information on versioning.
 128
 129 == Build from source
 130
 131 === Dependencies
 132
 133 You need the following tools to build {lt}:
 134
 135 * **https://www.gnu.org/software/automake/manual/html_node/Autotools-Introduction.html[GNU{nbsp}Autotools]**
 136   (**Automake{nbsp}≥{nbsp}1.10**,
 137   **Autoconf{nbsp}≥{nbsp}2.64**, and **Autoheader{nbsp}≥{nbsp}2.50**)
 138
 139 * **http://www.gnu.org/software/autoconf/[GNU{nbsp}Libtool]{nbsp}≥{nbsp}2.2**
 140
 141 * **https://github.com/westes/flex/[Flex]{nbsp}≥{nbsp}2.5.35**
 142
 143 * **https://www.gnu.org/software/bison/[Bison]{nbsp}≥{nbsp}2.4**
 144
 145 To build the {lt} manual pages:
 146
 147 * **https://www.methods.co.nz/asciidoc/[AsciiDoc]{nbsp}≥{nbsp}8.4.5**
 148 +
 149 NOTE: Previous versions could work, but were not tested.
 150
 151 * **https://pagure.io/xmlto[xmlto]{nbsp}≥{nbsp}0.0.21**
 152 +
 153 NOTE: Previous versions could work, but were not tested.
 154
 155 If you use GNU{nbsp}gold, which is _not_ mandatory:
 156
 157 * **GNU{nbsp}gold{nbsp}≥{nbsp}2.22**
 158
 159 NOTE: With GNU{nbsp}gold, you might need to add
 160 `-L/usr/local/lib` to the `LDFLAGS` environment variable.
 161
 162 === Build steps
 163
 164 . **If you have the {lt} Git source**, run:
 165 +
 166 ----
 167 $ ./bootstrap
 168 ----
 169 +
 170 This script creates the `configure` script.
 171
 172 . [[configure]]Configure the build:
 173 +
 174 --
 175 ----
 176 $ ./configure
 177 ----
 178
 179 If you want the {lib} Python bindings, use the
 180 `{nbh}{nbh}enable{nbh}python{nbh}bindings` option. See also the `PYTHON`
 181 and `PYTHON_CONFIG` environment variables in
 182 `./configure{nbsp}{nbh}{nbh}help`.
 183
 184 If you don't want to build the manual pages, use the
 185 `{nbh}{nbh}disable{nbh}man{nbh}pages` option.
 186
 187 If you want to embed the manual pages into the `lttng`,
 188 `lttng{nbh}sessiond`, `lttng{nbh}relayd`, and `lttng{nbh}crash` programs
 189 so that you don't need `man` to view them, use the
 190 `{nbh}{nbh}enable{nbh}embedded{nbh}help` option.
 191
 192 This build configuration script finds LTTng{nbh}UST with
 193 https://www.freedesktop.org/wiki/Software/pkg-config/[pkg{nbh}config]:
 194 set the `PKG_CONFIG_PATH` environment variable accordingly if
 195 pkg{nbh}config cannot find the `lttng{nbh}ust` package information.
 196
 197 See `./configure{nbsp}{nbh}{nbh}help` for the complete list of options.
 198 --
 199
 200 . Build the project:
 201 +
 202 ----
 203 $ make
 204 ----
 205
 206 . Install the project:
 207 +
 208 ----
 209 $ sudo make install
 210 $ sudo ldconfig
 211 ----
 212
 213 == Usage
 214
 215 See the https://lttng.org/docs/#doc-controlling-tracing[Tracing control]
 216 section of the LTTng Documentation to learn how to use the {lt}
 217 components.
 218
 219 See also the https://lttng.org/man/[LTTng manual pages] (all
 220 section{nbsp}1 and{nbsp}8 pages).
 221
 222 As there's no official {lib} Python bindings yet, see
 223 link:doc/python-howto.txt[`doc/python-howto.txt`] to understand how to
 224 use them.
 225
 226 == Community
 227
 228 Mailing list::
 229     https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev[lttng-dev]
 230     (mailto:lttng-dev@lists.lttng.org[lttng-dev@lists.lttng.org])
 231
 232 IRC channel::
 233     irc://irc.oftc.net/lttng[`#lttng`] on the OFTC network
 234
 235 Bug tracker::
 236     https://bugs.lttng.org/projects/lttng-tools[{lt} bug tracker]
 237
 238 GitHub project::
 239     https://github.com/lttng/lttng-tools/[lttng/lttng{nbh}tools]
 240
 241 Continuous integration::
 242     https://ci.lttng.org/job/lttng-tools_master_build/[{lt}'s master build]
 243     on LTTng's CI
 244
 245 Code review::
 246     https://review.lttng.org/q/project:lttng-tools[_lttng{nbh}tools_ project]
 247     on LTTng Review