author | kzhaldyb |
Thu, 24 Sep 2015 18:48:50 +0300 | |
changeset 33102 | 81a6fd1ab98d |
child 33140 | 7ff907b9d377 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 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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/* |
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* @test TestLogging |
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* @summary Check that a mixed GC is reflected in the gc logs |
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* @requires vm.gc=="G1" | vm.gc=="null" |
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* @library /testlibrary /../../test/lib |
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* @modules java.management |
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* @build sun.hotspot.WhiteBox gc.g1.mixedgc.TestLogging |
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* @run main ClassFileInstaller sun.hotspot.WhiteBox |
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* @run driver gc.g1.mixedgc.TestLogging |
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*/ |
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package gc.g1.mixedgc; |
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import jdk.test.lib.OutputAnalyzer; |
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import jdk.test.lib.ProcessTools; |
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import jdk.test.lib.Asserts; |
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import sun.hotspot.WhiteBox; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.Collections; |
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|
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/** |
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* Test spawns MixedGCProvoker in a separate VM and expects to find a message |
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* telling that a mixed gc has happened |
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*/ |
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public class TestLogging { |
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private static final String[] COMMON_OPTIONS = new String[]{ |
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"-Xbootclasspath/a:.", "-XX:+UseG1GC", |
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"-XX:+UnlockExperimentalVMOptions", |
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"-XX:+UnlockDiagnosticVMOptions", |
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"-XX:+WhiteBoxAPI", |
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"-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1 |
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"-Xms10M", "-Xmx10M", |
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"-XX:MaxTenuringThreshold=1", // promote objects after first gc |
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"-XX:InitiatingHeapOccupancyPercent=0", // marking cycle happens |
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// each time |
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"-XX:G1MixedGCCountTarget=4", |
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"-XX:MaxGCPauseMillis=30000", // to have enough time |
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"-XX:G1HeapRegionSize=1m", "-XX:G1HeapWastePercent=0", |
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"-XX:G1MixedGCLiveThresholdPercent=100"}; |
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public static final int ALLOCATION_SIZE = 20000; |
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public static final int ALLOCATION_COUNT = 15; |
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public static void main(String args[]) throws Exception { |
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// Test turns logging on by giving -XX:+PrintGC flag |
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test("-XX:+PrintGC"); |
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// Test turns logging on by giving -XX:+PrintGCDetails |
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test("-XX:+PrintGCDetails"); |
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} |
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private static void test(String vmFlag) throws Exception { |
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System.out.println(String.format("%s: running with %s flag", TestLogging.class.getSimpleName(), vmFlag)); |
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OutputAnalyzer output = spawnMixedGCProvoker(vmFlag); |
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System.out.println(output.getStdout()); |
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output.shouldHaveExitValue(0); |
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output.shouldContain("GC pause (G1 Evacuation Pause) (mixed)"); |
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} |
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/** |
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* Method spawns MixedGCProvoker with addition flags set |
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* |
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* @parameter extraFlags -flags to be added to the common options set |
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*/ |
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private static OutputAnalyzer spawnMixedGCProvoker(String... extraFlags) |
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throws Exception { |
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List<String> testOpts = new ArrayList<>(); |
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Collections.addAll(testOpts, COMMON_OPTIONS); |
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Collections.addAll(testOpts, extraFlags); |
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testOpts.add(MixedGCProvoker.class.getName()); |
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System.out.println(testOpts); |
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false, |
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testOpts.toArray(new String[testOpts.size()])); |
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return new OutputAnalyzer(pb.start()); |
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} |
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} |
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/** |
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* Utility class to guarantee a mixed GC. The class allocates several arrays and |
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* promotes them to the oldgen. After that it tries to provoke mixed GC by |
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* allocating new objects. |
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* |
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* The necessary condition for guaranteed mixed GC is running MixedGCProvoker is |
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* running in VM with the following flags: -XX:MaxTenuringThreshold=1, -Xms10M, |
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* -Xmx10M, -XX:G1MixedGCLiveThresholdPercent=100, -XX:G1HeapWastePercent=0, |
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* -XX:G1HeapRegionSize=1m |
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*/ |
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class MixedGCProvoker { |
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private static final WhiteBox WB = WhiteBox.getWhiteBox(); |
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private static final List<byte[]> liveOldObjects = new ArrayList<>(); |
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private static final List<byte[]> newObjects = new ArrayList<>(); |
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private static void allocateOldObjects() throws Exception { |
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List<byte[]> deadOldObjects = new ArrayList<>(); |
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// Allocates buffer and promotes it to the old gen. Mix live and dead old |
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// objects |
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for (int i = 0; i < TestLogging.ALLOCATION_COUNT; ++i) { |
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liveOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 10]); |
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deadOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 10]); |
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} |
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// need only 2 promotions to promote objects to the old gen |
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WB.youngGC(); |
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WB.youngGC(); |
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// check it is promoted & keep alive |
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Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects), |
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"List of the objects is suppose to be in OldGen"); |
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Asserts.assertTrue(WB.isObjectInOldGen(deadOldObjects), |
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"List of the objects is suppose to be in OldGen"); |
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} |
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/** |
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* Waits until Concurent Mark Cycle finishes |
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* @param wb Whitebox instance |
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* @param sleepTime sleep time |
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*/ |
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public static void waitTillCMCFinished(WhiteBox wb, int sleepTime) { |
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while (wb.g1InConcurrentMark()) { |
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if (sleepTime > -1) { |
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try { |
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Thread.sleep(sleepTime); |
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} catch (InterruptedException e) { |
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System.out.println("Got InterruptedException while waiting for ConcMarkCycle to finish"); |
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} |
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} |
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} |
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} |
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public static void main(String args[]) throws Exception { |
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// allocate old objects |
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allocateOldObjects(); |
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waitTillCMCFinished(WB, 0); |
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WB.g1StartConcMarkCycle(); |
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waitTillCMCFinished(WB, 0); |
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WB.youngGC(); |
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System.out.println("Allocating new objects to provoke mixed GC"); |
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// allocate more objects to provoke GC |
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for (int i = 0; i < (TestLogging.ALLOCATION_COUNT * 20); i++) { |
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newObjects.add(new byte[TestLogging.ALLOCATION_SIZE]); |
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} |
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// check that liveOldObjects still alive |
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Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects), |
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"List of the objects is suppose to be in OldGen"); |
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} |
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} |