I've been working with Linux systems for almost 20 years and became familiar with many files in /proc kernel provides to inspect its various subsystems.
/proc/sched_debug is one I still don't understand.
The early RaspberryPi's are/were excellent for experimenting with when trying to squeeze performance out of it, I managed to get one to clock up to close to 2Ghz which was that mythical beast to get past whilst remaining stable (no cpu heatsinks or fans) and the cpu scheduling certainly affects performance on them, but it affects all the main cpu's and OS near enough. So what works on Windows can be applied to Linux and vice versa.
This gives a nice overview, and adjusting the Quantum can certainly help any CPU but like the same on the Rpi, its possible to get to a point where the quantum is degrading performance noticeably and I think this has helped pc sales enormously.
/proc/sched_debug is one I still don't understand.