That's my understanding. It's how the OS accounts for the overhead that's unavailable. So if kernel_task is using 20% leaving 80% for userland, what's actuall

That's my understanding. It's how the OS accounts for the overhead that's unavailable. So if kernel_task is using 20% leaving 80% for userland, what's actually happening is your cpu is throttled to 80%. It's also why it's the go-to to blame for performance issues - it's the symptom not the cause. Your laptop isn't running warm because kernel_task is at 80% - but vice versa. Over 8 cores this figure can start to look crazy. (eg 80% kernel_task can be 8 cores * 10%)