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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// This test creates a bunch of tasks that simultaneously send to each
// other in a ring. The messages should all be basically
// independent.
// This is like msgsend-ring-pipes but adapted to use ARCs.
// This also serves as a pipes test, because ARCs are implemented with pipes.
extern mod extra;
use extra::arc;
use extra::future;
use extra::time;
use std::cell::Cell;
use std::io;
use std::os;
use std::uint;
use std::vec;
// A poor man's pipe.
type pipe = arc::MutexARC<~[uint]>;
fn send(p: &pipe, msg: uint) {
unsafe {
do p.access_cond |state, cond| {
state.push(msg);
cond.signal();
}
}
}
fn recv(p: &pipe) -> uint {
unsafe {
do p.access_cond |state, cond| {
while state.is_empty() {
cond.wait();
}
state.pop()
}
}
}
fn init() -> (pipe,pipe) {
let m = arc::MutexARC(~[]);
((&m).clone(), m)
}
fn thread_ring(i: uint, count: uint, num_chan: pipe, num_port: pipe) {
let mut num_chan = Some(num_chan);
let mut num_port = Some(num_port);
// Send/Receive lots of messages.
for uint::range(0u, count) |j| {
//error!("task %?, iter %?", i, j);
let mut num_chan2 = num_chan.swap_unwrap();
let mut num_port2 = num_port.swap_unwrap();
send(&num_chan2, i * j);
num_chan = Some(num_chan2);
let _n = recv(&num_port2);
//log(error, _n);
num_port = Some(num_port2);
};
}
fn main() {
let args = os::args();
let args = if os::getenv(~"RUST_BENCH").is_some() {
~[~"", ~"100", ~"10000"]
} else if args.len() <= 1u {
~[~"", ~"10", ~"100"]
} else {
copy args
};
let num_tasks = uint::from_str(args[1]).get();
let msg_per_task = uint::from_str(args[2]).get();
let (num_chan, num_port) = init();
let mut num_chan = Cell::new(num_chan);
let start = time::precise_time_s();
// create the ring
let mut futures = ~[];
for uint::range(1u, num_tasks) |i| {
//error!("spawning %?", i);
let (new_chan, num_port) = init();
let num_chan2 = Cell::new(num_chan.take());
let num_port = Cell::new(num_port);
let new_future = do future::spawn() {
let num_chan = num_chan2.take();
let num_port1 = num_port.take();
thread_ring(i, msg_per_task, num_chan, num_port1)
};
futures.push(new_future);
num_chan.put_back(new_chan);
};
// do our iteration
thread_ring(0, msg_per_task, num_chan.take(), num_port);
// synchronize
for futures.mut_iter().advance |f| {
f.get()
}
let stop = time::precise_time_s();
// all done, report stats.
let num_msgs = num_tasks * msg_per_task;
let elapsed = (stop - start);
let rate = (num_msgs as float) / elapsed;
io::println(fmt!("Sent %? messages in %? seconds",
num_msgs, elapsed));
io::println(fmt!(" %? messages / second", rate));
io::println(fmt!(" %? μs / message", 1000000. / rate));
}
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