LTTng is the kernel tracer that generates traces of an instrumented Linux kernel. LTTV is a modular viewer that can perform analysis on such traces and show the result in text or in a graphical interface.
If you want to contribute to the project, you are very welcome! Depending on your interest, you might want to design a new instrumentation and analysis with LTTng or LTTV (see the roadmap, we have plenty of ideas waiting). You can always join us through the lttv-dev and ltt-dev mailing lists.
To work with the git repository, start by :
git clone git://ltt.openrapids.net/linux-2.6-lttng.git linux-2.6-lttng
Read the following documentation :