| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * 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. |
| */ |
| |
| import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| |
| import java.util.concurrent.DelayQueue; |
| import java.util.concurrent.Delayed; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * This is not a regression test, but a stress benchmark test for |
| * 6609775: Reduce context switches in DelayQueue due to signalAll |
| * |
| * This runs in the same wall clock time, but much reduced cpu time, |
| * with the changes for 6609775. |
| */ |
| public class Stress { |
| |
| public static void main(String[] args) throws Throwable { |
| |
| final DelayQueue<Delayed> q = new DelayQueue<>(); |
| final long t0 = System.nanoTime(); |
| for (long i = 0; i < 1000; i++) { |
| final long expiry = t0 + i*10L*1000L*1000L; |
| q.add(new Delayed() { |
| public long getDelay(TimeUnit unit) { |
| return unit.convert(expiry - System.nanoTime(), |
| NANOSECONDS); |
| } |
| public int compareTo(Delayed x) { |
| long d = getDelay(NANOSECONDS) |
| - x.getDelay(NANOSECONDS); |
| return d < 0 ? -1 : d > 0 ? 1 : 0; }}); |
| } |
| |
| for (int i = 0; i < 300; i++) |
| new Thread() { public void run() { |
| try { |
| while (!q.isEmpty()) |
| q.poll(10L, TimeUnit.SECONDS); |
| } catch (Throwable t) { t.printStackTrace(); } |
| }}.start(); |
| } |
| } |