LTTng-UST Userspace Tracer

The userspace tracer is designed to provide detailed information about userspace activity. UST is a port of the LTTng kernel tracer to userspace. Like the LTTng kernel tracer, performance is the main goal. Tracing does not require system calls or traps. UST instrumentation points may be added in any userspace code including signal handlers and libraries­.


For examples on how to instrument an application with UST, see its various man pages:

You can also have a look at the examples in the source tree, which are installed in /usr/share/lttng-ust/doc/examples.


See the Downloads page.

Project tracker

You can report bugs or request features on the LTTng-UST project page on the tracker.

Contact information

For help and developer discussions, see the Contact page.