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::str::from_str;
23 use std::thread::Thread;
26 // This is a simple bench that creates M pairs of tasks. These
27 // tasks ping-pong back and forth over a pair of streams. This is a
28 // canonical message-passing benchmark as it heavily strains message
29 // passing and almost nothing else.
31 fn ping_pong_bench(n: uint, m: uint) {
33 // Create pairs of tasks that pingpong back and forth.
34 fn run_pair(n: uint) {
35 // Create a stream A->B
36 let (atx, arx) = channel::<()>();
37 // Create a stream B->A
38 let (btx, brx) = channel::<()>();
40 Thread::spawn(move|| {
41 let (tx, rx) = (atx, brx);
42 for _ in range(0, n) {
48 Thread::spawn(move|| {
49 let (tx, rx) = (btx, arx);
50 for _ in range(0, n) {
57 for _ in range(0, m) {
66 let args = os::args();
67 let args = args.as_slice();
68 let n = if args.len() == 3 {
69 from_str::<uint>(args[1].as_slice()).unwrap()
74 let m = if args.len() == 3 {
75 from_str::<uint>(args[2].as_slice()).unwrap()
80 ping_pong_bench(n, m);