I wonder if it is possible to access the current fps rate from the game, OUTSIDE of the game?
I want to monitor what else is happening on my computer whenever I experience a (very short) fps slump/drop. That means that I need far more than to just visually observe “oh, the fps is low again. Duuuh, maybe that is why the screen is flickering?” 
I need to see if any other processes are spiking at the same time.
So: is the current fps available via an api, or in a log file, or in a User Exit or in… whatever manner, so that I can access it from, for example, a Python script? Please describe how this can be done.
A tool that im aware of offhand is called PresentMon which uses events within windows itself to track present operations to the display. No injection into the process or anything like that, and can also show a rough estimate of input latency: