Update README: document dep on modprobe for kernel tracing

[lttng-tools.git] / README

LTTng Trace Control
----------------

Please visit http://lttng.org for more information.

Latest development can be found at:

    * Gitweb :  http://git.lttng.org/lttng-tools.git/
    * Git :     git://git.lttng.org/lttng-tools.git

REQUIREMENTS:

	- Linux kernel >= 2.6.27
	  pipe2(), epoll_create1() and SOCK_CLOEXEC are needed to run the session
	  daemon. There were introduce in the Linux 2.6.27

    - liburcu
      Userspace RCU library, by Mathieu Desnoyers and Paul E. McKenney

      -> Tested with liburcu >= v0.6.6

      * Debian/Ubuntu package: liburcu-dev
      * Git : git://git.lttng.org/userspace-rcu.git
      * Website:  http://lttng.org/urcu

    - libpopt >= 1.13
      Library for parsing command line parameters

      * Debian/Ubuntu package: libpopt-dev

    - For kernel tracing: modprobe

For developers using the git tree:

This source tree is based on the autotools suite from GNU to simplify
portability. Here are some things you should have on your system in order to
compile the git repository tree :

- GNU autotools (automake >=1.10, autoconf >=2.50, autoheader >=2.50)
  (make sure your system wide "automake" points to a recent version!)
- GNU Libtool >=2.2
  (for more information, go to http://www.gnu.org/software/autoconf/)
- GNU Gold >= 2.22
  (Before this version we hit a known bug documented at:
  http://sourceware.org/bugzilla/show_bug.cgi?id=11317)

If you get the tree from the repository, you will need to use the "bootstrap"
script in the root of the tree. It calls all the GNU tools needed to prepare the
tree configuration.

INSTALLATION INSTRUCTIONS:

  - Download, compile and install the prerequisites.
  Then:
  $ ./configure
  $ make
  $ sudo make install
  $ sudo ldconfig

  If compiling from the git repository, run ./bootstrap before running
  the configure script, to generate it.

USAGE:

Please see doc/quickstart.txt to help you start tracing. You can also use the
-h/--help command on 'lttng' and all other commands offered in this tool (Ex:
lttng enable-event -h).

PACKAGE CONTENTS:

    This package contains the following elements:

    - liblttngctl
      The LTTng tracing control library.

    - libsessiond-comm (internal)
	  The lttng-sessiond communication library. In order to talk with
	  lttng-sessiond, this library must be used.

    - libkernel-ctl (internal)
      Kernel tracer control and ioctl definitions.

    - libconsumer (internal)
      Library for Kernel and (optionally) UST trace consumer.

	- libkernel-consumer (internal)
	  Library for Kernel consumer control

	- libust-consumer (internal)
	  Library for UST consumer control

	- libhashtable (internal)
	  Library wrapper over URCU hashtables.

    - lttng-consumerd
      The consumer daemon which uses libconsumer.

    - lttng-sessiond
      The LTTng session daemon binary.

    - lttng
      The LTTng tracer command line control tool.

    - include (lttng.h --> installed in $(includedir)/lttng/lttng.h)
      The liblttngctl API header file.

    - tests
      Various test programs.

	- doc
	  Various documentations and quickstart guide.