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}2.6.27**
  56 +
  57 Use `{nbh}{nbh}disable{nbh}epoll` at <<configure,build configuration>>
  58 time to build {lt} for an older kernel. However, note that we can't
  59 provide any guarantee below 2.6.27.
  60
  61 * **http://www.liburcu.org/[Userspace{nbsp}RCU]{nbsp}≥{nbsp}0.9.0**.
  62 +
  63 Debian/Ubuntu package: `liburcu{nbh}dev`.
  64
  65 * **popt{nbsp}≥{nbsp}1.13**
  66 +
  67 Debian/Ubuntu package: `libpopt{nbh}dev`.
  68
  69 * **http://xmlsoft.org/[Libxml2]{nbsp}≥{nbsp}2.7.6**
  70 +
  71 Debian/Ubuntu package: `libxml2{nbh}dev`
  72
  73 The following dependencies are optional:
  74
  75 * **https://babeltrace.org/[Babeltrace{nbsp}2]**: default viewer
  76   of the https://lttng.org/man/1/lttng-view/[`lttng view`] command.
  77 +
  78 Debian/Ubuntu package: `babeltrace2`
  79
  80 * **https://lttng.org/[LTTng{nbh}UST]** (same minor version as {lt}):
  81   LTTng user space tracing (applications and libraries).
  82 +
  83 Debian/Ubuntu package: `liblttng{nbh}ust{nbh}dev`
  84
  85 * **Perl**: `make{nbsp}check` and tests.
  86
  87 * **https://www.python.org/[Python]{nbsp}≥{nbsp}3.0**:
  88   `make{nbsp}check` and tests.
  89 +
  90 Debian/Ubuntu package: `python3`
  91
  92 * **http://www.swig.org/[SWIG]{nbsp}≥{nbsp}2.0** and
  93   **Python{nbsp}3 development headers**: Python bindings
  94   (enabled at <<configure,build configuration>> time with the
  95   `{nbh}{nbh}enable{nbh}python{nbh}bindings` option).
  96 +
  97 Debian/Ubuntu packages: `swig2.0` and `python3{nbh}dev`
  98
  99 * **modprobe** and/or
 100   **https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/[kmod]{nbsp}≥{nbsp}22**:
 101   automatic LTTng kernel modules loading (kernel tracing).
 102
 103 * **Bash**: `make{nbsp}check`.
 104
 105 * **http://man7.org/linux/man-pages/man1/man.1.html[`man`]**
 106   (manual pager): view `lttng` command manual
 107   pages with the `{nbh}{nbh}help` option or with the
 108   https://lttng.org/man/1/lttng-help/[`lttng{nbsp}help`] command.
 109 +
 110 NOTE: You can use the <<configure,build configuration>> option
 111 `{nbh}{nbh}enable{nbh}embedded{nbh}help` to embed the manual pages into
 112 the `lttng`, `lttng{nbh}sessiond`, `lttng{nbh}relayd`, and
 113 `lttng{nbh}crash` programs so that you don't need `man` to view them.
 114
 115 * **http://perfmon2.sourceforge.net/[libpfm]{nbsp}≥{nbsp}4.0**:
 116   perf regression test suite.
 117 +
 118 Debian/Ubuntu package: `libpfm4-dev`
 119
 120 {lt} supports both the LTTng Linux kernel tracer and LTTng user space
 121 tracer sharing the same _minor_ version. While some minor releases do
 122 not change the tracer ABIs and _could_ work, no testing is performed to
 123 ensure that cross-version compatibility is maintained.
 124
 125 You don't need to rebuild or modify applications instrumented with older
 126 versions of the LTTng{nbh}UST project to make them work with the
 127 components of the latest {lt} release.
 128
 129 See the https://lttng.org/docs/[LTTng Documentation] for more
 130 information on versioning.
 131
 132 == Build from source
 133
 134 === Dependencies
 135
 136 You need the following tools to build {lt}:
 137
 138 * **https://www.gnu.org/software/automake/manual/html_node/Autotools-Introduction.html[GNU{nbsp}Autotools]**
 139   (**Automake{nbsp}≥{nbsp}1.10**,
 140   **Autoconf{nbsp}≥{nbsp}2.64**, and **Autoheader{nbsp}≥{nbsp}2.50**)
 141
 142 * **http://www.gnu.org/software/autoconf/[GNU{nbsp}Libtool]{nbsp}≥{nbsp}2.2**
 143
 144 * **https://github.com/westes/flex/[Flex]{nbsp}≥{nbsp}2.5.35**
 145
 146 * **https://www.gnu.org/software/bison/[Bison]{nbsp}≥{nbsp}2.4**
 147
 148 To build the {lt} manual pages:
 149
 150 * **https://www.methods.co.nz/asciidoc/[AsciiDoc]{nbsp}≥{nbsp}8.4.5**
 151 +
 152 NOTE: Previous versions could work, but were not tested.
 153
 154 * **https://pagure.io/xmlto[xmlto]{nbsp}≥{nbsp}0.0.21**
 155 +
 156 NOTE: Previous versions could work, but were not tested.
 157
 158 If you use GNU{nbsp}gold, which is _not_ mandatory:
 159
 160 * **GNU{nbsp}gold{nbsp}≥{nbsp}2.22**
 161
 162 NOTE: With GNU{nbsp}gold, you might need to add
 163 `-L/usr/local/lib` to the `LDFLAGS` environment variable.
 164
 165 === Build steps
 166
 167 . **If you have the {lt} Git source**, run:
 168 +
 169 ----
 170 $ ./bootstrap
 171 ----
 172 +
 173 This script creates the `configure` script.
 174
 175 . [[configure]]Configure the build:
 176 +
 177 --
 178 ----
 179 $ ./configure
 180 ----
 181
 182 If you want the {lib} Python bindings, use the
 183 `{nbh}{nbh}enable{nbh}python{nbh}bindings` option. See also the `PYTHON`
 184 and `PYTHON_CONFIG` environment variables in
 185 `./configure{nbsp}{nbh}{nbh}help`.
 186
 187 If you don't want to build the manual pages, use the
 188 `{nbh}{nbh}disable{nbh}man{nbh}pages` option.
 189
 190 If you want to embed the manual pages into the `lttng`,
 191 `lttng{nbh}sessiond`, `lttng{nbh}relayd`, and `lttng{nbh}crash` programs
 192 so that you don't need `man` to view them, use the
 193 `{nbh}{nbh}enable{nbh}embedded{nbh}help` option.
 194
 195 If your Linux kernel is older than 2.6.27, use the
 196 `{nbh}{nbh}disable{nbh}epoll` option.
 197
 198 This build configuration script finds LTTng{nbh}UST with
 199 https://www.freedesktop.org/wiki/Software/pkg-config/[pkg{nbh}config]:
 200 set the `PKG_CONFIG_PATH` environment variable accordingly if
 201 pkg{nbh}config cannot find the `lttng{nbh}ust` package information.
 202
 203 See `./configure{nbsp}{nbh}{nbh}help` for the complete list of options.
 204 --
 205
 206 . Build the project:
 207 +
 208 ----
 209 $ make
 210 ----
 211
 212 . Install the project:
 213 +
 214 ----
 215 $ sudo make install
 216 $ sudo ldconfig
 217 ----
 218
 219 == Usage
 220
 221 See the https://lttng.org/docs/#doc-controlling-tracing[Tracing control]
 222 section of the LTTng Documentation to learn how to use the {lt}
 223 components.
 224
 225 See also the https://lttng.org/man/[LTTng manual pages] (all
 226 section{nbsp}1 and{nbsp}8 pages).
 227
 228 As there's no official {lib} Python bindings yet, see
 229 link:doc/python-howto.txt[`doc/python-howto.txt`] to understand how to
 230 use them.
 231
 232 == Community
 233
 234 Mailing list::
 235     https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev[lttng-dev]
 236     (mailto:lttng-dev@lists.lttng.org[lttng-dev@lists.lttng.org])
 237
 238 IRC channel::
 239     irc://irc.oftc.net/lttng[`#lttng`] on the OFTC network
 240
 241 Bug tracker::
 242     https://bugs.lttng.org/projects/lttng-tools[{lt} bug tracker]
 243
 244 GitHub project::
 245     https://github.com/lttng/lttng-tools/[lttng/lttng{nbh}tools]
 246
 247 Continuous integration::
 248     https://ci.lttng.org/job/lttng-tools_master_build/[{lt}'s master build]
 249     on LTTng's CI
 250
 251 Code review::
 252     https://review.lttng.org/q/project:lttng-tools[_lttng{nbh}tools_ project]
 253     on LTTng Review