CPU utilisation is a lie.

https://www.brendanlong.com/cpu-utilization-is-a-lie.h...

I've noted for years that a system reporting a 50% CPU load was typically somewhere closer to 65% thanks to variable clock speeds and multi-threaded cores, and here are charts to demonstrate it. And it gets much worse with certain workloads - a processor running matrix math is typically at 100% load when it is reporting 50% load.