src/test/bench/msgsend-pipes-shared.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // A port of the simplistic benchmark from
  12 //
  13 //    http://github.com/PaulKeeble/ScalaVErlangAgents
  14 //
  15 // I *think* it's the same, more or less.
  16
  17 // This version uses pipes with a shared send endpoint. It should have
  18 // different scalability characteristics compared to the select
  19 // version.
  20
  21 #![feature(duration, duration_span)]
  22
  23 use std::sync::mpsc::{channel, Sender, Receiver};
  24 use std::env;
  25 use std::thread;
  26 use std::time::Duration;
  27
  28 fn move_out<T>(_x: T) {}
  29
  30 enum request {
  31     get_count,
  32     bytes(usize),
  33     stop
  34 }
  35
  36 fn server(requests: &Receiver<request>, responses: &Sender<usize>) {
  37     let mut count = 0;
  38     let mut done = false;
  39     while !done {
  40         match requests.recv() {
  41           Ok(request::get_count) => { responses.send(count.clone()).unwrap(); }
  42           Ok(request::bytes(b)) => {
  43             //println!("server: received {} bytes", b);
  44             count += b;
  45           }
  46           Err(..) => { done = true; }
  47           _ => { }
  48         }
  49     }
  50     responses.send(count).unwrap();
  51     //println!("server exiting");
  52 }
  53
  54 fn run(args: &[String]) {
  55     let (to_parent, from_child) = channel();
  56     let (to_child, from_parent) = channel();
  57
  58     let size = args[1].parse::<usize>().unwrap();
  59     let workers = args[2].parse::<usize>().unwrap();
  60     let num_bytes = 100;
  61     let mut result = None;
  62     let mut p = Some((to_child, to_parent, from_parent));
  63     let dur = Duration::span(|| {
  64         let (to_child, to_parent, from_parent) = p.take().unwrap();
  65         let mut worker_results = Vec::new();
  66         for _ in 0..workers {
  67             let to_child = to_child.clone();
  68             worker_results.push(thread::spawn(move|| {
  69                 for _ in 0..size / workers {
  70                     //println!("worker {}: sending {} bytes", i, num_bytes);
  71                     to_child.send(request::bytes(num_bytes)).unwrap();
  72                 }
  73                 //println!("worker {} exiting", i);
  74             }));
  75         }
  76         thread::spawn(move|| {
  77             server(&from_parent, &to_parent);
  78         });
  79
  80         for r in worker_results {
  81             let _ = r.join();
  82         }
  83
  84         //println!("sending stop message");
  85         to_child.send(request::stop).unwrap();
  86         move_out(to_child);
  87         result = Some(from_child.recv().unwrap());
  88     });
  89     let result = result.unwrap();
  90     print!("Count is {}\n", result);
  91     print!("Test took {}\n", dur);
  92     let thruput = ((size / workers * workers) as f64) / (dur.secs() as f64);
  93     print!("Throughput={} per sec\n", thruput);
  94     assert_eq!(result, num_bytes * size);
  95 }
  96
  97 fn main() {
  98     let args = env::args();
  99     let args = if env::var_os("RUST_BENCH").is_some() {
 100         vec!("".to_string(), "1000000".to_string(), "10000".to_string())
 101     } else if args.len() <= 1 {
 102         vec!("".to_string(), "10000".to_string(), "4".to_string())
 103     } else {
 104         args.map(|x| x.to_string()).collect()
 105     };
 106
 107     println!("{:?}", args);
 108     run(&args);
 109 }