I used to work at a consulting firm called EfficiOS[0], specialized in OS and application efficiency and performance. They maintain the LTTng[1] kernel and userspace tracers and related tools, and offer training. I'm not sure whether that responds to your specific needs, but if you get in touch they'll certainly be able to guide you.
[0] http://www.efficios.com/ [1] http://lttng.org/