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// 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.
// xfail-pretty
use future::future;
extern mod std;
use std::time;
use std::arc;
// A poor man's pipe.
type pipe = arc::MutexARC<~[uint]>;
fn send(p: &pipe, msg: uint) {
do p.access_cond |state, cond| {
state.push(msg);
cond.signal();
}
}
fn recv(p: &pipe) -> uint {
do p.access_cond |state, cond| {
while vec::is_empty(*state) {
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 = option::swap_unwrap(&mut num_chan);
let mut num_port2 = option::swap_unwrap(&mut num_port);
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 = Some(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 = ~mut None;
*num_chan2 <-> num_chan;
let num_port = ~mut Some(num_port);
let new_future = future::spawn(|move num_chan2, move num_port| {
let mut num_chan = None;
num_chan <-> *num_chan2;
let mut num_port1 = None;
num_port1 <-> *num_port;
thread_ring(i, msg_per_task,
option::unwrap(num_chan),
option::unwrap(num_port1))
});
futures.push(new_future);
num_chan = Some(new_chan);
};
// do our iteration
thread_ring(0u, msg_per_task, option::unwrap(num_chan), num_port);
// synchronize
for futures.each |f| { future::get(f) };
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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