| /* |
| * Copyright (c) 2017, 2018, 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. |
| */ |
| |
| |
| /* |
| * @test |
| * @key stress |
| * |
| * @summary converted from VM Testbase nsk/monitoring/stress/thread/cmon003. |
| * VM Testbase keywords: [stress, monitoring, nonconcurrent] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * The test checks that waited time returned by ThreadInfo.getWaitedTime() is |
| * not greater than overall time of execution of a thread. Also, the test |
| * checks that waited time is not less than minimal time that each thread |
| * waits without notifications on Object.wait(long). |
| * Main thread starts a number of threads that is specified in "-threadCount" |
| * option. Each thread has three Object.wait(long) blocks; two of them do |
| * not receieve notifications, therefore a thread will be waiting for at least |
| * a few milliseconds. All threads access the same Integer variable |
| * ("calculated") and increase its value by one. Main thread waits until |
| * "calculated" becomes equal to number of started threads and then perform |
| * three checks. |
| * The test fails if "calculated" value is not equal to number of started |
| * threads. It also fails if value returned by ThreadInfo.getWaitedTime() in |
| * any thread is greater than overall time of execution of the thread. Also, |
| * the test fails if waited time is less than time waited in first and second |
| * Object.wait(long) methods (those objects do not receive notifications). |
| * Then the test repeats the procedure with starting threads and performing |
| * checks ITERATIONS times. |
| * All comparisions of time are made with precision specified in PRECISION |
| * constant. Values returned by ThreadInfo.getWaitedTime() and |
| * System.nanoTime() and may use different methods to sample time, so |
| * PRECISION is essential to compare those two times and is set to 3 |
| * (milliseconds) by default. |
| * This particular test performs access to the MBeans' methods through custom |
| * MBeanServer. |
| * COMMENTS |
| * Fixed the bug |
| * 4983682 TEST BUG: cmon001/2/3 should call System.nanoTime for time |
| * comparison |
| * 5070997: TEST_BUG: incorrect below-checking of thread waiting time |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm |
| * nsk.monitoring.stress.thread.cmon001 |
| * -testMode=server |
| * -MBeanServer=custom |
| * -threadCount=400 |
| */ |
| |
