Flexibility: SystemTap's framework allows users to develop simple scripts for investigating and monitoring a wide variety of kernel functions, system calls, and other events that occur in kernel space. As a result, SystemTap is not so much a tool as it is a system that allows you to develop your own kernel-specific forensic and monitoring tools.
Ease of use: as mentioned earlier, SystemTap allows users to probe kernel-space events without having to resort to instrument, recompile, install, and reboot the kernel.
Most of the SystemTap scripts enumerated in Chapter 5, Useful SystemTap Scripts demonstrate system forensics and monitoring capabilities not natively available with other similar tools (such as top, oprofile, or ps). These scripts are provided to give readers extensive examples of the application of SystemTap and to educate them further on the capabilities they can employ when writing their own SystemTap scripts.