1 // Copyright 2014 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.
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.
11 // file at the top-level directory of this distribution and at
12 // http://rust-lang.org/COPYRIGHT.
14 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
15 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
16 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
17 // option. This file may not be copied, modified, or distributed
18 // except according to those terms.
20 use std::sync::mpsc::channel;
22 use std::thread::Thread;
25 // This is a simple bench that creates M pairs of tasks. These
26 // tasks ping-pong back and forth over a pair of streams. This is a
27 // canonical message-passing benchmark as it heavily strains message
28 // passing and almost nothing else.
30 fn ping_pong_bench(n: uint, m: uint) {
32 // Create pairs of tasks that pingpong back and forth.
33 fn run_pair(n: uint) {
34 // Create a stream A->B
35 let (atx, arx) = channel::<()>();
36 // Create a stream B->A
37 let (btx, brx) = channel::<()>();
39 Thread::spawn(move|| {
40 let (tx, rx) = (atx, brx);
41 for _ in range(0, n) {
47 Thread::spawn(move|| {
48 let (tx, rx) = (btx, arx);
49 for _ in range(0, n) {
56 for _ in range(0, m) {
65 let args = os::args();
66 let args = args.as_slice();
67 let n = if args.len() == 3 {
68 args[1].parse::<uint>().unwrap()
73 let m = if args.len() == 3 {
74 args[2].parse::<uint>().unwrap()
79 ping_pong_bench(n, m);