blob: d709178dc4ba84296aa4cf3397ba14bb0c281b9f [file] [log] [blame]
//! A small server that writes as many nul bytes on all connections it receives.
//! There is no concurrency in this server, only one connection is written to at
//! a time. You can use this as a benchmark for the raw performance of writing
//! data to a socket by measuring how much data is being written on each
//! connection.
//! Typically you'll want to run this example with:
//! cargo run --example sink --release
//! And then you can connect to it via:
//! cargo run --example connect > /dev/null
//! You should see your CPUs light up as data's being shove into the ether.
extern crate env_logger;
extern crate futures;
extern crate tokio_core;
extern crate tokio_io;
use std::env;
use std::iter;
use std::net::SocketAddr;
use futures::Future;
use futures::stream::{self, Stream};
use tokio_io::IoFuture;
use tokio_core::net::{TcpListener, TcpStream};
use tokio_core::reactor::Core;
fn main() {
let addr = env::args().nth(1).unwrap_or("".to_string());
let addr = addr.parse::<SocketAddr>().unwrap();
let mut core = Core::new().unwrap();
let handle = core.handle();
let socket = TcpListener::bind(&addr, &handle).unwrap();
println!("Listening on: {}", addr);
let server = socket.incoming().for_each(|(socket, addr)| {
println!("got a socket: {}", addr);
handle.spawn(write(socket).or_else(|_| Ok(())));
fn write(socket: TcpStream) -> IoFuture<()> {
static BUF: &'static [u8] = &[0; 64 * 1024];
let iter = iter::repeat(());
Box::new(stream::iter_ok(iter).fold(socket, |socket, ()| {
tokio_io::io::write_all(socket, BUF).map(|(socket, _)| socket)
}).map(|_| ()))