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annotate test/compiler/6772683/InterruptedTest.java @ 889:15c5903cf9e1

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6865703: G1: Parallelize hot card cache cleanup Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads. Reviewed-by: jmasa, tonyp
author johnc
date Mon, 03 Aug 2009 12:59:30 -0700
parents bd02caa94611
children c18cbe5936b8
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1 /*
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2 * Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 /*
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26 * @test
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27 * @bug 6772683
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28 * @summary Thread.isInterrupted() fails to return true on multiprocessor PC
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29 * @run main/othervm InterruptedTest
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30 */
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31
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32 public class InterruptedTest {
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33
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34 public static void main(String[] args) throws Exception {
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35 Thread workerThread = new Thread("worker") {
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36 public void run() {
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37 System.out.println("Worker thread: running...");
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38 while (!Thread.currentThread().isInterrupted()) {
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39 }
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40 System.out.println("Worker thread: bye");
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41 }
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42 };
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43 System.out.println("Main thread: starts a worker thread...");
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44 workerThread.start();
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45 System.out.println("Main thread: waits at most 5s for the worker thread to die...");
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46 workerThread.join(5000); // Wait 5 sec to let run() method to be compiled
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47 int ntries = 0;
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48 while (workerThread.isAlive() && ntries < 5) {
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49 System.out.println("Main thread: interrupts the worker thread...");
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50 workerThread.interrupt();
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51 if (workerThread.isInterrupted()) {
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52 System.out.println("Main thread: worker thread is interrupted");
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53 }
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54 ntries++;
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55 System.out.println("Main thread: waits for the worker thread to die...");
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56 workerThread.join(1000); // Wait 1 sec and try again
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57 }
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58 if (ntries == 5) {
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59 System.out.println("Main thread: the worker thread dod not die");
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60 System.exit(97);
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61 }
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62 System.out.println("Main thread: bye");
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63 }
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64
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65 }