Module perf_monitor::cpu

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Get cpu usage for current process and specified thread.

A method named cpu on ThreadStat and ProcessStat can retrieve cpu usage of thread and process respectively.

The returning value is unnormalized, that is for multi-processor machine, the cpu usage will beyond 100%, for example returning 2.8 means 280% cpu usage. If normalized value is what you expected, divide the returning by processor_numbers.

§Example

let mut stat = ThreadStat::cur().unwrap();
let _ = (0..1_000_000).into_iter().sum::<u64>();
let usage = stat.cpu().unwrap();
println!("current thread cpu usage is {:.2}%", usage * 100f64);

§Bottom Layer Interface

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