author | mbaesken |
Thu, 01 Aug 2019 08:59:31 +0200 | |
changeset 57645 | 152cd40a1d36 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2019, 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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* @bug 4858522 |
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* @summary Basic unit test of HotspotRuntimeMBean.getTotalSafepointTime() |
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* |
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8131035: [TESTBUG] sun/management/HotspotRuntimeMBean/GetTotalSafepointTime.java needs to enable UsePerfData
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* @run main/othervm -XX:+UsePerfData GetTotalSafepointTime |
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*/ |
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/* |
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* This test is just a sanity check and does not check for the correct value. |
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*/ |
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import sun.management.*; |
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public class GetTotalSafepointTime { |
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private static HotspotRuntimeMBean mbean = |
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(HotspotRuntimeMBean)ManagementFactoryHelper.getHotspotRuntimeMBean(); |
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// Careful with these values. |
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private static final long MIN_VALUE_FOR_PASS = 1; |
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// Thread.getAllStackTraces() should cause safepoints. |
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// If this test is failing because it doesn't, |
152cd40a1d36
8228658: test GetTotalSafepointTime.java fails on fast Linux machines with Total safepoint time 0 ms
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// MIN_VALUE_FOR_PASS should be reset to 0 |
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public static long executeThreadDumps(long initial_value) { |
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long value; |
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do { |
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Thread.getAllStackTraces(); |
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value = mbean.getTotalSafepointTime(); |
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} while (value == initial_value); |
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return value; |
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} |
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public static void main(String args[]) throws Exception { |
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long value = executeThreadDumps(0); |
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System.out.println("Total safepoint time (ms): " + value); |
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if (value < MIN_VALUE_FOR_PASS) { |
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throw new RuntimeException("Total safepoint time " + |
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"illegal value: " + value + " ms " + |
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"(MIN = " + MIN_VALUE_FOR_PASS + ")"); |
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} |
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long value2 = executeThreadDumps(value); |
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System.out.println("Total safepoint time (ms): " + value2); |
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if (value2 <= value) { |
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throw new RuntimeException("Total safepoint time " + |
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"did not increase " + |
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"(value = " + value + "; " + |
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"value2 = " + value2 + ")"); |
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} |
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System.out.println("Test passed."); |
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} |
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} |