SystemTap provides free software (GPL) infrastructure to simplify the gathering of information about the running Linux system. This assists diagnosis of a performance or functional problem. SystemTap eliminates the need for the developer to go through the tedious and disruptive instrument
... [More], recompile, install, and reboot sequence that may be otherwise required to collect data.
SystemTap provides a simple command line interface and scripting language for writing instrumentation for a live running kernel and user-space applications. [Less]