ringcore 0.1.0

A minimal async runtime built on Linux io_uring, designed to expose how Rust futures map to kernel I/O.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

use std::fs;
use std::thread;
use std::time::Instant;
use std::io::Read;

fn read_file(id: usize) -> std::io::Result<()> {
    let path = format!("temp_file_{}.txt", id);
    let mut file = fs::File::open(&path)?;
    let mut buf = [0u8; 1024];
    file.read_exact(&mut buf)?;
    Ok(())
}

fn main() -> std::io::Result<()> {
    // Setup 100 files
    for i in 0..100 {
        fs::write(format!("temp_file_{}.txt", i), vec![i as u8; 1024])?;
    }

    let start = Instant::now();
    let mut handles = vec![];
    for i in 0..100 {
        handles.push(thread::spawn(move || {
            read_file(i)
        }));
    }

    for handle in handles {
        handle.join().map_err(|_| std::io::Error::new(std::io::ErrorKind::Other, "Thread panicked"))??;
    }

    println!("Standard concurrent: 100 threads in {:?}", start.elapsed());

    // Cleanup
    for i in 0..100 {
        let _ = fs::remove_file(format!("temp_file_{}.txt", i));
    }
    Ok(())
}