Have you ever been in a situation where you realize that you didn’t insert debug print at a few points in your code, so now you won’t know if your CPU hits a particular line of code for execution until you recompile the code with debug statements? Don’t worry, there’s an easier solution. Basically, you need to insert dynamic probe points at different locations of your source code assembly instructions.
For advanced users, kernel documentation/trace and man perf provide a lot of information about different types of kernels and user space tracing mechanisms; however, average users just want a few simple steps and an example to get started quickly. That’s where this article will help.
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