nushell/crates/nu-system/src/main.rs

use std::thread::available_parallelism;
use std::time::Duration;

fn main() {
    let cores = match available_parallelism() {
        Ok(p) => p.get(),
        Err(_) => 1usize,
    };
    for run in 1..=10 {
        for proc in nu_system::collect_proc(Duration::from_millis(100), false) {
            if proc.cpu_usage() > 0.00001 {
                println!(
                    "{} - {} - {} - {} - {:.2}% - {}M - {}M - {} procs",
                    run,
                    proc.pid(),
                    proc.name(),
                    proc.status(),
                    proc.cpu_usage() / cores as f64,
                    proc.mem_size() / (1024 * 1024),
                    proc.virtual_size() / (1024 * 1024),
                    cores,
                )
            }
        }
        std::thread::sleep(std::time::Duration::from_millis(1000));
    }
}