Struct perf_monitor::cpu::ThreadStat

pub struct ThreadStat { /* private fields */ }

A struct to monitor thread cpu usage

Implementations

impl ThreadStat

pub fn cur() -> Result<Self>

return a monitor of current thread.

Examples found in repository

examples/activity_monitor.rs (line 17)

fn main() {
    build_some_threads();

    // cpu
    let core_num = processor_numbers().unwrap();
    let mut stat_p = ProcessStat::cur().unwrap();
    let mut stat_t = ThreadStat::cur().unwrap();

    let mut last_loop = Instant::now();
    loop {
        if last_loop.elapsed() > Duration::from_secs(1) {
            last_loop = Instant::now();
        } else {
            std::thread::sleep(Duration::from_micros(100));
            continue;
        }
        println!("----------");

        // cpu
        let _ = (0..1_000).into_iter().sum::<i128>();

        let usage_p = stat_p.cpu().unwrap() * 100f64;
        let usage_t = stat_t.cpu().unwrap() * 100f64;

        println!(
            "[CPU] core Number: {}, process usage: {:.2}%, current thread usage: {:.2}%",
            core_num, usage_p, usage_t
        );

        // mem
        let mem_info = get_process_memory_info().unwrap();

        println!(
            "[Memory] memory used: {} bytes, virtural memory used: {} bytes ",
            mem_info.resident_set_size, mem_info.virtual_memory_size
        );

        // fd
        let fd_num = fd_count_cur().unwrap();

        println!("[FD] fd number: {}", fd_num);

        // io
        let io_stat = get_process_io_stats().unwrap();

        println!(
            "[IO] io-in: {} bytes, io-out: {} bytes",
            io_stat.read_bytes, io_stat.write_bytes
        );
    }
}

pub fn build(thread_id: ThreadId) -> Result<Self>

return a monitor of specified thread.

tid is NOT std::thread::ThreadId. ThreadId::current can be used to retrieve a valid tid.

pub fn cpu(&mut self) -> Result<f64>

return the cpu usage from last invoke, or when this struct created if it is the first invoke.

Examples found in repository

examples/activity_monitor.rs (line 33)

fn main() {
    build_some_threads();

    // cpu
    let core_num = processor_numbers().unwrap();
    let mut stat_p = ProcessStat::cur().unwrap();
    let mut stat_t = ThreadStat::cur().unwrap();

    let mut last_loop = Instant::now();
    loop {
        if last_loop.elapsed() > Duration::from_secs(1) {
            last_loop = Instant::now();
        } else {
            std::thread::sleep(Duration::from_micros(100));
            continue;
        }
        println!("----------");

        // cpu
        let _ = (0..1_000).into_iter().sum::<i128>();

        let usage_p = stat_p.cpu().unwrap() * 100f64;
        let usage_t = stat_t.cpu().unwrap() * 100f64;

        println!(
            "[CPU] core Number: {}, process usage: {:.2}%, current thread usage: {:.2}%",
            core_num, usage_p, usage_t
        );

        // mem
        let mem_info = get_process_memory_info().unwrap();

        println!(
            "[Memory] memory used: {} bytes, virtural memory used: {} bytes ",
            mem_info.resident_set_size, mem_info.virtual_memory_size
        );

        // fd
        let fd_num = fd_count_cur().unwrap();

        println!("[FD] fd number: {}", fd_num);

        // io
        let io_stat = get_process_io_stats().unwrap();

        println!(
            "[IO] io-in: {} bytes, io-out: {} bytes",
            io_stat.read_bytes, io_stat.write_bytes
        );
    }
}

pub fn cpu_time(&mut self) -> Result<Duration>

return the cpu_time in user mode and system mode from last invoke, or when this struct created if it is the first invoke.