Python

Most Python profilers ask you to decide in advance. You import something, or you wrap the process, or you restart it with a flag. That works on your laptop and helps little at 3 a.m., when the profile you want is of a process that has already been running for six hours. eBPF changes the bargain. An agent samples from the kernel on a timer, and the application never knows it is there. For compiled code that is close to free: read the registers, walk the frames, resolve the addresses against DWARF. Python is where it stops being easy. ...

Important This is a blog post series. If you haven’t read Part 1 we recommend you to do so first! In the first blog post, we learned about the fantastic symbols (debug symbols), how the symbolization process works and lastly, how to find the symbolic names of addresses in a compiled binary. ...