Is there a program to graph (CPU) clockspeeds in real time? For example, something like psensor which is useful for temperature graphs.
EDIT: Running Fedora 27 on a Ryzen system (Pinnacle Ridge)
It's a bit overkill for just plotting CPU frequencies, but Netdata can do this with minimal setup effort (install it, start it collecting data, and point a web browser at the dashboard). It also provides a mind boggling variety of other statistics in real (or near real) time, including networking data, temperature sensor data, general system performance info, and even per-user stats, with a comparatively miniscule overhead (typically less than 1% CPU utilization despite collecting data every second, and double digit MB memory usage with default settings on most systems).