fn get_max_process_cpu_usage(&self) -> f32 {
        self.cpus.len() as f32 * 100.
    }
It is sometime possible that a CPU usage computation is bigger than
`"number of CPUs" * 100`.

To prevent that, we compute ahead of time this maximum value and ensure that processes'
CPU usage don't go over it.
src/unix/linux/system.rs