225 lines
7.6 KiB
Java
225 lines
7.6 KiB
Java
/*
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* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key stress
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*
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* @summary converted from VM testbase nsk/stress/thread/thread008.
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* VM testbase keywords: [stress, diehard, slow, nonconcurrent, quick]
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* VM testbase readme:
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* DESCRIPTION
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* Try to start the given number of threads of the lower priority
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* starting simultaneously when notifyall() is signaled at the
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* stopLine object.
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*
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* @run main/othervm nsk.stress.thread.thread008 500 2m 5s
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*/
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package nsk.stress.thread;
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import java.io.PrintStream;
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/**
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* Try to start the given number of threads of lower priority and
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* starting simultaneously when <code>notifyall()</code> is signaled
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* at the <code>stopLine</code> object.
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*/
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public class thread008 extends Thread {
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/**
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* Enable/disable printing of debugging info.
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*/
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private static boolean DEBUG_MODE = false;
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/**
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* The minimal number of threads that the tested JVM must support.
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* (This number should be specified by the command-line parameter.
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*/
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private static int THREADS_EXPECTED = 1000;
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/**
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* Timeout (in milliseconds) after which all threads must halt.
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*/
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private static long TIMEOUT = 300000; // 5 minutes
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/**
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* Wait few seconds to allow child threads actually start.
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*/
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private static long YIELD_TIME = 5000; // 5 seconds
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/**
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* Once <code>arg</code> is ``XXXs'', or ``XXXm'', or ``XXXms'',
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* return the given number of seconds, minutes, or milliseconds
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* correspondingly.
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*/
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private static long parseTime(String arg) {
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for (int i = arg.lastIndexOf("ms"); i > -1; )
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return Long.parseLong(arg.substring(0, i));
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for (int i = arg.lastIndexOf("s"); i > -1; )
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return Long.parseLong(arg.substring(0, i)) * 1000;
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for (int i = arg.lastIndexOf("m"); i > -1; )
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return Long.parseLong(arg.substring(0, i)) * 60000;
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throw new IllegalArgumentException(
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"cannot recognize time scale: " + arg);
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}
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/**
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* Re-invoke to <code>run(args,out)</code> in a JCK style.
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*/
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public static void main(String args[]) {
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int exitCode = run(args, System.out);
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System.exit(exitCode + 95);
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}
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/**
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* Entry point for the JavaTest harness: <code>args[0]</code> must
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* prescribe the value for the <code>THREADS_EXPECTED</code> field.
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*/
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public static int run(String args[], PrintStream out) {
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if (args.length > 0)
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THREADS_EXPECTED = Integer.parseInt(args[0]);
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if (args.length > 1)
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TIMEOUT = parseTime(args[1]);
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if (args.length > 2)
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YIELD_TIME = parseTime(args[2]);
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if (args.length > 3)
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DEBUG_MODE = args[3].toLowerCase().startsWith("-v");
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if (args.length > 4) {
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out.println("#");
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out.println("# Too namy command-line arguments!");
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out.println("#");
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return 2;
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}
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if (DEBUG_MODE) {
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out.println("Start " + THREADS_EXPECTED + " threads of lower priority,");
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out.println("wait " + YIELD_TIME + " milliseconds to let them go,");
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out.println("and halt after " + TIMEOUT + " milliseconds:");
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}
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Thread thread[] = new Thread[THREADS_EXPECTED];
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int i;
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for (i = 0; i < THREADS_EXPECTED; i++)
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try {
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thread[i] = new thread008();
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if (thread[i].getPriority() == Thread.MIN_PRIORITY) {
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out.println("#");
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out.println("# Sorry! -- The test cannot execute because");
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out.println("# it cannot create threads with lower priority");
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out.println("# than that executint run(args[],out) method.");
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out.println("#");
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out.println("# However, since no JVM mistakes were found,");
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out.println("# the test finishes as PASSED.");
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out.println("#");
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return 0;
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}
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thread[i].setPriority(Thread.MIN_PRIORITY);
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thread[i].start();
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if (DEBUG_MODE)
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out.println("Threads started: " + (i + 1));
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} catch (OutOfMemoryError oome) {
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oome.printStackTrace(out);
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out.println("#");
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out.println("# The test have FAILED:");
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out.println("# Only " + i + " threads could start,");
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out.println("# while at least " + THREADS_EXPECTED +
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" were expected.");
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out.println("#");
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return 2;
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}
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// Actually start:
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synchronized (stopLine) {
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stopLine.notifyAll();
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}
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// ...and let them go:
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try {
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doSleep(YIELD_TIME);
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} catch (InterruptedException ie) {
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ie.printStackTrace(out);
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out.println("#");
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out.println("# OOPS! Could not let threads actually start!");
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out.println("#");
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return 2;
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}
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if (oopsCounter > 0) {
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out.println("#");
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out.println("# The test have FAILED, because:");
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out.println("# " + oopsCounter + " threads were interrupted.");
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out.println("#");
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return 2;
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}
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if (DEBUG_MODE)
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out.println("The test have PASSED.");
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return 0;
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}
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static Object stopLine = new Object();
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static int oopsCounter = 0;
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/**
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* The thread activity: do nothing special, but do not
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* free CPU time so that the thread's memory could not
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* be moved to swap file.
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*/
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public void run() {
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synchronized (stopLine) {
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try {
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stopLine.wait();
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} catch (InterruptedException oops) {
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oopsCounter++;
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return;
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}
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}
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while (!timeout())
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continue;
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}
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private static long startTime = System.currentTimeMillis();
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/**
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* Check if timeout for this test is exceeded.
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*/
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private boolean timeout() {
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long elapsedTime = System.currentTimeMillis() - startTime;
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return elapsedTime > TIMEOUT;
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}
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/**
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* Yield to other threads for the given amount of
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* <code>time</code> (milliseconds).
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*/
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private static void doSleep(long time) throws InterruptedException {
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//
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// Since Java 2, the method Thread.sleep() doesn't guarantee
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// to yield to other threads. So, call Object.wait() to yield:
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//
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Object lock = new Object(); // local scope, nobody can notify it
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synchronized (lock) {
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lock.wait(time);
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}
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}
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}
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