122 lines
3.9 KiB
Java
122 lines
3.9 KiB
Java
/*
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/*
|
|
* This file is available under and governed by the GNU General Public
|
|
* License version 2 only, as published by the Free Software Foundation.
|
|
* However, the following notice accompanied the original version of this
|
|
* file:
|
|
*
|
|
* Written by Doug Lea with assistance from members of JCP JSR-166
|
|
* Expert Group and released to the public domain, as explained at
|
|
* http://creativecommons.org/publicdomain/zero/1.0/
|
|
*/
|
|
|
|
/*
|
|
* @test
|
|
* @bug 4965960
|
|
* @summary Exercise ExecutorCompletionService
|
|
* @library /test/lib
|
|
*/
|
|
|
|
import static java.util.concurrent.TimeUnit.MILLISECONDS;
|
|
|
|
import java.util.concurrent.Callable;
|
|
import java.util.concurrent.ExecutorCompletionService;
|
|
import java.util.concurrent.ExecutorService;
|
|
import java.util.concurrent.Executors;
|
|
import jdk.test.lib.Utils;
|
|
|
|
public class ExecutorCompletionServiceLoops {
|
|
static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
|
|
static final int POOLSIZE = 10;
|
|
static final ExecutorService pool =
|
|
Executors.newFixedThreadPool(POOLSIZE);
|
|
static final ExecutorCompletionService<Integer> ecs =
|
|
new ExecutorCompletionService<>(pool);
|
|
static boolean print = false;
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
int max = 8;
|
|
int base = 2000;
|
|
|
|
if (args.length > 0)
|
|
max = Integer.parseInt(args[0]);
|
|
|
|
System.out.println("Warmup...");
|
|
oneTest(base);
|
|
print = true;
|
|
|
|
for (int i = 1; i <= max; i += (i+1) >>> 1) {
|
|
System.out.print("n: " + i * base);
|
|
oneTest(i * base);
|
|
}
|
|
pool.shutdown();
|
|
if (! pool.awaitTermination(LONG_DELAY_MS, MILLISECONDS))
|
|
throw new Error();
|
|
}
|
|
|
|
static class Task implements Callable<Integer> {
|
|
public Integer call() {
|
|
int s = 0;
|
|
int l = System.identityHashCode(this);
|
|
for (int i = 0; i < 5; ++i) {
|
|
l = LoopHelpers.compute2(l);
|
|
s += LoopHelpers.compute1(l);
|
|
}
|
|
return new Integer(s);
|
|
}
|
|
}
|
|
|
|
static class Producer implements Runnable {
|
|
final ExecutorCompletionService cs;
|
|
final int iters;
|
|
Producer(ExecutorCompletionService ecs, int i) {
|
|
cs = ecs;
|
|
iters = i;
|
|
}
|
|
public void run() {
|
|
for (int i = 0; i < iters; ++i)
|
|
ecs.submit(new Task());
|
|
}
|
|
}
|
|
|
|
static void oneTest(int iters) throws Exception {
|
|
long startTime = System.nanoTime();
|
|
new Thread(new Producer(ecs, iters)).start();
|
|
|
|
int r = 0;
|
|
for (int i = 0; i < iters; ++i)
|
|
r += ecs.take().get().intValue();
|
|
|
|
long elapsed = System.nanoTime() - startTime;
|
|
long tpi = elapsed/ iters;
|
|
|
|
if (print)
|
|
System.out.println("\t: " + LoopHelpers.rightJustify(tpi) + " ns per task");
|
|
|
|
if (r == 0) // avoid overoptimization
|
|
System.out.println("useless result: " + r);
|
|
}
|
|
|
|
}
|