src/test/bench/msgsend-pipes.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 #![feature(duration, duration_span)]
  18
  19 use std::sync::mpsc::{channel, Sender, Receiver};
  20 use std::env;
  21 use std::thread;
  22 use std::time::Duration;
  23
  24 enum request {
  25     get_count,
  26     bytes(usize),
  27     stop
  28 }
  29
  30 fn server(requests: &Receiver<request>, responses: &Sender<usize>) {
  31     let mut count: usize = 0;
  32     let mut done = false;
  33     while !done {
  34         match requests.recv() {
  35           Ok(request::get_count) => { responses.send(count.clone()); }
  36           Ok(request::bytes(b)) => {
  37             //println!("server: received {} bytes", b);
  38             count += b;
  39           }
  40           Err(..) => { done = true; }
  41           _ => { }
  42         }
  43     }
  44     responses.send(count).unwrap();
  45     //println!("server exiting");
  46 }
  47
  48 fn run(args: &[String]) {
  49     let (to_parent, from_child) = channel();
  50
  51     let size = args[1].parse::<usize>().unwrap();
  52     let workers = args[2].parse::<usize>().unwrap();
  53     let num_bytes = 100;
  54     let mut result = None;
  55     let mut to_parent = Some(to_parent);
  56     let dur = Duration::span(|| {
  57         let to_parent = to_parent.take().unwrap();
  58         let mut worker_results = Vec::new();
  59         let from_parent = if workers == 1 {
  60             let (to_child, from_parent) = channel();
  61             worker_results.push(thread::spawn(move|| {
  62                 for _ in 0..size / workers {
  63                     //println!("worker {}: sending {} bytes", i, num_bytes);
  64                     to_child.send(request::bytes(num_bytes));
  65                 }
  66                 //println!("worker {} exiting", i);
  67             }));
  68             from_parent
  69         } else {
  70             let (to_child, from_parent) = channel();
  71             for _ in 0..workers {
  72                 let to_child = to_child.clone();
  73                 worker_results.push(thread::spawn(move|| {
  74                     for _ in 0..size / workers {
  75                         //println!("worker {}: sending {} bytes", i, num_bytes);
  76                         to_child.send(request::bytes(num_bytes));
  77                     }
  78                     //println!("worker {} exiting", i);
  79                 }));
  80             }
  81             from_parent
  82         };
  83         thread::spawn(move|| {
  84             server(&from_parent, &to_parent);
  85         });
  86
  87         for r in worker_results {
  88             let _ = r.join();
  89         }
  90
  91         //println!("sending stop message");
  92         //to_child.send(stop);
  93         //move_out(to_child);
  94         result = Some(from_child.recv().unwrap());
  95     });
  96     let result = result.unwrap();
  97     print!("Count is {}\n", result);
  98     print!("Test took {}\n", dur);
  99     let thruput = ((size / workers * workers) as f64) / (dur.secs() as f64);
 100     print!("Throughput={} per sec\n", thruput);
 101     assert_eq!(result, num_bytes * size);
 102 }
 103
 104 fn main() {
 105     let args = env::args();
 106     let args = if env::var_os("RUST_BENCH").is_some() {
 107         vec!("".to_string(), "1000000".to_string(), "8".to_string())
 108     } else if args.len() <= 1 {
 109         vec!("".to_string(), "10000".to_string(), "4".to_string())
 110     } else {
 111         args.map(|x| x.to_string()).collect()
 112     };
 113
 114     println!("{:?}", args);
 115     run(&args);
 116 }