Module perf_monitor::cpu

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

platform	thread	process
windows	GetThreadTimes	GetProcessTimes
linux & android	/proc/{pid}/task/{tid}/stat	clockgettime
macos & ios	thread_info	getrusage

Structs

• ProcessStat
  A struct to monitor process cpu usage
• ThreadId
• ThreadStat
  A struct to monitor thread cpu usage

Functions

• cpu_time
• processor_numbers
  logical processor number

Type Aliases

• Result
  A specialized Result type for I/O operations.