Nothing so new in lttng-tools. Mostly adding benchmark point and measuring UST registration time and notification time. Please see the benchnark branch in the lttng-tools git tree (http://git.lttng.org/?p=lttng-tools.git;a=shortlog;h=refs/heads/benchmark)
Currently, I'm profiling the session daemon to find out CPU usage during different tracing steps and improve some "bottlenecks".
I'm also looking for a recurrent bug introduce with the new futex scheme where we are unable to kill the session daemon with a catchable signal such as SIGTERM or SIGINT.
Finally, planning an article and my memoir.