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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.
// A port of the simplistic benchmark from
//
// http://github.com/PaulKeeble/ScalaVErlangAgents
//
// I *think* it's the same, more or less.
// This version uses pipes with a shared send endpoint. It should have
// different scalability characteristics compared to the select
// version.
extern mod extra;
use std::comm::{Port, Chan, SharedChan};
use std::comm;
use std::io::{Writer, WriterUtil};
use std::io;
use std::os;
use std::task;
use std::ptr;
use std::uint;
use std::vec;
fn move_out<T>(x: T) {}
enum request {
get_count,
bytes(uint),
stop
}
fn server(requests: &Port<request>, responses: &comm::Chan<uint>) {
let mut count = 0u;
let mut done = false;
while !done {
match requests.try_recv() {
Some(get_count) => { responses.send(copy count); }
Some(bytes(b)) => {
//error!("server: received %? bytes", b);
count += b;
}
None => { done = true; }
_ => { }
}
}
responses.send(count);
//error!("server exiting");
}
fn run(args: &[~str]) {
let (from_child, to_parent) = comm::stream();
let (from_parent, to_child) = comm::stream();
let to_child = SharedChan::new(to_child);
let size = uint::from_str(args[1]).get();
let workers = uint::from_str(args[2]).get();
let num_bytes = 100;
let start = extra::time::precise_time_s();
let mut worker_results = ~[];
for uint::range(0, workers) |_i| {
let to_child = to_child.clone();
let mut builder = task::task();
builder.future_result(|r| worker_results.push(r));
do builder.spawn {
for uint::range(0, size / workers) |_i| {
//error!("worker %?: sending %? bytes", i, num_bytes);
to_child.send(bytes(num_bytes));
}
//error!("worker %? exiting", i);
}
}
do task::spawn || {
server(&from_parent, &to_parent);
}
for worker_results.iter().advance |r| {
r.recv();
}
//error!("sending stop message");
to_child.send(stop);
move_out(to_child);
let result = from_child.recv();
let end = extra::time::precise_time_s();
let elapsed = end - start;
io::stdout().write_str(fmt!("Count is %?\n", result));
io::stdout().write_str(fmt!("Test took %? seconds\n", elapsed));
let thruput = ((size / workers * workers) as float) / (elapsed as float);
io::stdout().write_str(fmt!("Throughput=%f per sec\n", thruput));
assert_eq!(result, num_bytes * size);
}
fn main() {
let args = os::args();
let args = if os::getenv(~"RUST_BENCH").is_some() {
~[~"", ~"1000000", ~"10000"]
} else if args.len() <= 1u {
~[~"", ~"10000", ~"4"]
} else {
copy args
};
debug!("%?", args);
run(args);
}
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