| /* |
| * Copyright (c) 2015, 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 TestLogging |
| * @summary Check that a mixed GC is reflected in the gc logs |
| * @requires vm.gc=="G1" | vm.gc=="null" |
| * @library /testlibrary /../../test/lib |
| * @ignore 8138607 |
| * @modules java.management |
| * @build sun.hotspot.WhiteBox gc.g1.mixedgc.TestLogging |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run driver gc.g1.mixedgc.TestLogging |
| */ |
| |
| package gc.g1.mixedgc; |
| |
| import jdk.test.lib.OutputAnalyzer; |
| import jdk.test.lib.ProcessTools; |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.WhiteBox; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Collections; |
| |
| /** |
| * Test spawns MixedGCProvoker in a separate VM and expects to find a message |
| * telling that a mixed gc has happened |
| */ |
| public class TestLogging { |
| private static final String[] COMMON_OPTIONS = new String[]{ |
| "-Xbootclasspath/a:.", "-XX:+UseG1GC", |
| "-XX:+UnlockExperimentalVMOptions", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+WhiteBoxAPI", |
| "-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1 |
| "-Xms10M", "-Xmx10M", |
| "-XX:MaxTenuringThreshold=1", // promote objects after first gc |
| "-XX:InitiatingHeapOccupancyPercent=0", // marking cycle happens |
| // each time |
| "-XX:G1MixedGCCountTarget=4", |
| "-XX:MaxGCPauseMillis=30000", // to have enough time |
| "-XX:G1HeapRegionSize=1m", "-XX:G1HeapWastePercent=0", |
| "-XX:G1MixedGCLiveThresholdPercent=100"}; |
| |
| public static final int ALLOCATION_SIZE = 20000; |
| public static final int ALLOCATION_COUNT = 15; |
| |
| public static void main(String args[]) throws Exception { |
| // Test turns logging on by giving -XX:+PrintGC flag |
| test("-XX:+PrintGC"); |
| // Test turns logging on by giving -XX:+PrintGCDetails |
| test("-XX:+PrintGCDetails"); |
| } |
| |
| private static void test(String vmFlag) throws Exception { |
| System.out.println(String.format("%s: running with %s flag", TestLogging.class.getSimpleName(), vmFlag)); |
| OutputAnalyzer output = spawnMixedGCProvoker(vmFlag); |
| System.out.println(output.getStdout()); |
| output.shouldHaveExitValue(0); |
| output.shouldContain("GC pause (G1 Evacuation Pause) (mixed)"); |
| } |
| |
| /** |
| * Method spawns MixedGCProvoker with addition flags set |
| * |
| * @parameter extraFlags -flags to be added to the common options set |
| */ |
| private static OutputAnalyzer spawnMixedGCProvoker(String... extraFlags) |
| throws Exception { |
| List<String> testOpts = new ArrayList<>(); |
| Collections.addAll(testOpts, COMMON_OPTIONS); |
| Collections.addAll(testOpts, extraFlags); |
| testOpts.add(MixedGCProvoker.class.getName()); |
| System.out.println(testOpts); |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false, |
| testOpts.toArray(new String[testOpts.size()])); |
| return new OutputAnalyzer(pb.start()); |
| } |
| } |
| |
| /** |
| * Utility class to guarantee a mixed GC. The class allocates several arrays and |
| * promotes them to the oldgen. After that it tries to provoke mixed GC by |
| * allocating new objects. |
| * |
| * The necessary condition for guaranteed mixed GC is running MixedGCProvoker is |
| * running in VM with the following flags: -XX:MaxTenuringThreshold=1, -Xms10M, |
| * -Xmx10M, -XX:G1MixedGCLiveThresholdPercent=100, -XX:G1HeapWastePercent=0, |
| * -XX:G1HeapRegionSize=1m |
| */ |
| class MixedGCProvoker { |
| private static final WhiteBox WB = WhiteBox.getWhiteBox(); |
| private static final List<byte[]> liveOldObjects = new ArrayList<>(); |
| private static final List<byte[]> newObjects = new ArrayList<>(); |
| |
| private static void allocateOldObjects() throws Exception { |
| List<byte[]> deadOldObjects = new ArrayList<>(); |
| // Allocates buffer and promotes it to the old gen. Mix live and dead old |
| // objects |
| for (int i = 0; i < TestLogging.ALLOCATION_COUNT; ++i) { |
| liveOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 10]); |
| deadOldObjects.add(new byte[TestLogging.ALLOCATION_SIZE * 10]); |
| } |
| |
| // need only 2 promotions to promote objects to the old gen |
| WB.youngGC(); |
| WB.youngGC(); |
| // check it is promoted & keep alive |
| Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects), |
| "List of the objects is suppose to be in OldGen"); |
| Asserts.assertTrue(WB.isObjectInOldGen(deadOldObjects), |
| "List of the objects is suppose to be in OldGen"); |
| } |
| |
| |
| /** |
| * Waits until Concurent Mark Cycle finishes |
| * @param wb Whitebox instance |
| * @param sleepTime sleep time |
| */ |
| public static void waitTillCMCFinished(WhiteBox wb, int sleepTime) { |
| while (wb.g1InConcurrentMark()) { |
| if (sleepTime > -1) { |
| try { |
| Thread.sleep(sleepTime); |
| } catch (InterruptedException e) { |
| System.out.println("Got InterruptedException while waiting for ConcMarkCycle to finish"); |
| } |
| } |
| } |
| } |
| |
| |
| |
| public static void main(String args[]) throws Exception { |
| // allocate old objects |
| allocateOldObjects(); |
| waitTillCMCFinished(WB, 0); |
| WB.g1StartConcMarkCycle(); |
| waitTillCMCFinished(WB, 0); |
| |
| WB.youngGC(); |
| System.out.println("Allocating new objects to provoke mixed GC"); |
| // allocate more objects to provoke GC |
| for (int i = 0; i < (TestLogging.ALLOCATION_COUNT * 20); i++) { |
| newObjects.add(new byte[TestLogging.ALLOCATION_SIZE]); |
| } |
| // check that liveOldObjects still alive |
| Asserts.assertTrue(WB.isObjectInOldGen(liveOldObjects), |
| "List of the objects is suppose to be in OldGen"); |
| } |
| } |