352 lines
16 KiB
Java
352 lines
16 KiB
Java
/*
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* Copyright (c) 2016, 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 TestPLABPromotion
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* @bug 8141278
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* @summary Test PLAB promotion
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* @requires vm.gc=="G1" | vm.gc=="null"
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* @requires vm.opt.FlightRecorder != true
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* @library /testlibrary /../../test/lib /
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* @modules java.management
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* @build ClassFileInstaller
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* sun.hotspot.WhiteBox
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* gc.g1.plab.lib.MemoryConsumer
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* gc.g1.plab.lib.LogParser
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* gc.g1.plab.lib.AppPLABPromotion
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* @run main ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* @run main/timeout=240 gc.g1.plab.TestPLABPromotion
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*/
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package gc.g1.plab;
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import java.util.List;
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import java.util.Map;
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import java.util.Arrays;
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import java.io.PrintStream;
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import gc.g1.plab.lib.AppPLABPromotion;
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import gc.g1.plab.lib.LogParser;
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import gc.g1.plab.lib.PLABUtils;
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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.Platform;
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/**
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* Test checks PLAB promotion of different size objects.
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*/
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public class TestPLABPromotion {
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// GC ID with survivor PLAB statistics
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private final static long GC_ID_SURVIVOR_STATS = 1l;
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// GC ID with old PLAB statistics
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private final static long GC_ID_OLD_STATS = 2l;
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// Allowable difference for memory consumption (percentage)
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private final static long MEM_DIFFERENCE_PCT = 5;
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private static final int PLAB_SIZE_SMALL = 1024;
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private static final int PLAB_SIZE_MEDIUM = 4096;
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private static final int PLAB_SIZE_HIGH = 65536;
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private static final int OBJECT_SIZE_SMALL = 10;
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private static final int OBJECT_SIZE_MEDIUM = 100;
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private static final int OBJECT_SIZE_HIGH = 1000;
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private static final int GC_NUM_SMALL = 1;
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private static final int GC_NUM_MEDIUM = 3;
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private static final int GC_NUM_HIGH = 7;
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private static final int WASTE_PCT_SMALL = 10;
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private static final int WASTE_PCT_MEDIUM = 20;
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private static final int WASTE_PCT_HIGH = 30;
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private static final int YOUNG_SIZE_LOW = 16;
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private static final int YOUNG_SIZE_HIGH = 64;
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private static final boolean PLAB_FIXED = true;
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private static final boolean PLAB_DYNAMIC = false;
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private final static TestCase[] TEST_CASES = {
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// Test cases for unreachable object, PLAB size is fixed
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, false, false),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, false, false),
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// Test cases for reachable objects, PLAB size is fixed
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, false),
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_HIGH, PLAB_FIXED, true, false),
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// Test cases for unreachable object, PLAB size is not fixed
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, false, false),
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// Test cases for reachable objects, PLAB size is not fixed
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true),
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true),
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new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, false),
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new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true),
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new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true)
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};
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public static void main(String[] args) throws Throwable {
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for (TestCase testCase : TEST_CASES) {
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// What we going to check.
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testCase.print(System.out);
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List<String> options = PLABUtils.prepareOptions(testCase.toOptions());
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options.add(AppPLABPromotion.class.getName());
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OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()]));
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if (out.getExitValue() != 0) {
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System.out.println(out.getOutput());
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throw new RuntimeException("Expect exit code 0.");
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}
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checkResults(out.getOutput(), testCase);
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}
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}
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private static void checkResults(String output, TestCase testCase) {
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long plabAllocatedSurvivor;
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long directAllocatedSurvivor;
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long plabAllocatedOld;
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long directAllocatedOld;
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long memAllocated = testCase.getMemToFill();
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long wordSize = Platform.is32bit() ? 4l : 8l;
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LogParser logParser = new LogParser(output);
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Map<String, Long> survivorStats = getPlabStats(logParser, LogParser.ReportType.SURVIVOR_STATS, GC_ID_SURVIVOR_STATS);
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Map<String, Long> oldStats = getPlabStats(logParser, LogParser.ReportType.OLD_STATS, GC_ID_OLD_STATS);
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plabAllocatedSurvivor = wordSize * survivorStats.get("used");
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directAllocatedSurvivor = wordSize * survivorStats.get("direct_allocated");
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plabAllocatedOld = wordSize * oldStats.get("used");
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directAllocatedOld = wordSize * oldStats.get("direct_allocated");
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System.out.printf("Survivor PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedSurvivor, directAllocatedSurvivor, memAllocated);
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System.out.printf("Old PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedOld, directAllocatedOld, memAllocated);
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// Unreachable objects case
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if (testCase.isDeadObjectCase()) {
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// No dead objects should be promoted
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if (!(checkRatio(plabAllocatedSurvivor, memAllocated) && checkRatio(directAllocatedSurvivor, memAllocated))) {
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System.out.println(output);
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throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Survivor");
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}
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if (!(checkRatio(plabAllocatedOld, memAllocated) && checkRatio(directAllocatedOld, memAllocated))) {
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System.out.println(output);
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throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Old");
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}
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} else {
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// Live objects case
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if (testCase.isPromotedByPLAB()) {
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// All live small objects should be promoted using PLAB
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if (!checkDifferenceRatio(plabAllocatedSurvivor, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Expect that Survivor PLAB allocation are similar to all mem consumed");
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}
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if (!checkDifferenceRatio(plabAllocatedOld, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Expect that Old PLAB allocation are similar to all mem consumed");
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}
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} else {
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// All big objects should be directly allocated
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if (!checkDifferenceRatio(directAllocatedSurvivor, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Test fails. Expect that Survivor direct allocation are similar to all mem consumed");
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}
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if (!checkDifferenceRatio(directAllocatedOld, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Test fails. Expect that Old direct allocation are similar to all mem consumed");
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}
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}
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// All promoted objects size should be similar to all consumed memory
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if (!checkDifferenceRatio(plabAllocatedSurvivor + directAllocatedSurvivor, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Test fails. Expect that Survivor gen total allocation are similar to all mem consumed");
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}
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if (!checkDifferenceRatio(plabAllocatedOld + directAllocatedOld, memAllocated)) {
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System.out.println(output);
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throw new RuntimeException("Test fails. Expect that Old gen total allocation are similar to all mem consumed");
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}
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}
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System.out.println("Test passed!");
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}
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/**
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* Returns true if checkedValue is less than MEM_DIFFERENCE_PCT percent of controlValue.
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*
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* @param checkedValue - checked value
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* @param controlValue - referent value
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* @return true if checkedValue is less than MEM_DIFFERENCE_PCT percent of controlValue
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*/
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private static boolean checkRatio(long checkedValue, long controlValue) {
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return (Math.abs(checkedValue) / controlValue) * 100L < MEM_DIFFERENCE_PCT;
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}
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/**
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* Returns true if difference of checkedValue and controlValue is less than
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* MEM_DIFFERENCE_PCT percent of controlValue.
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*
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* @param checkedValue - checked value
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* @param controlValue - referent value
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* @return true if difference of checkedValue and controlValue is less than
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* MEM_DIFFERENCE_PCT percent of controlValue
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*/
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private static boolean checkDifferenceRatio(long checkedValue, long controlValue) {
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return (Math.abs(checkedValue - controlValue) / controlValue) * 100L < MEM_DIFFERENCE_PCT;
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}
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private static Map<String, Long> getPlabStats(LogParser logParser, LogParser.ReportType type, long gc_id) {
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Map<String, Long> survivorStats = logParser.getEntries()
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.get(gc_id)
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.get(type);
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return survivorStats;
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}
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/**
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* Description of one test case.
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*/
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private static class TestCase {
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private final int wastePct;
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private final int plabSize;
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private final int chunkSize;
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private final int parGCThreads;
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private final int edenSize;
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private final boolean plabIsFixed;
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private final boolean objectsAreReachable;
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private final boolean promotedByPLAB;
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/**
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* @param wastePct
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* ParallelGCBufferWastePct
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* @param plabSize
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* -XX:OldPLABSize and -XX:YoungPLABSize
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* @param chunkSize
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* requested object size for memory consumption
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* @param parGCThreads
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* -XX:ParallelGCThreads
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* @param edenSize
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* NewSize and MaxNewSize
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* @param plabIsFixed
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* Use dynamic PLAB or fixed size PLAB
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* @param objectsAreReachable
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* true - allocate live objects
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* false - allocate unreachable objects
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* @param promotedByPLAB
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* true - we expect to see PLAB allocation during promotion
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* false - objects will be directly allocated during promotion
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*/
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public TestCase(int wastePct,
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int plabSize,
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int chunkSize,
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int parGCThreads,
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int edenSize,
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boolean plabIsFixed,
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boolean objectsAreReachable,
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boolean promotedByPLAB
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) {
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if (wastePct == 0 || plabSize == 0 || chunkSize == 0 || parGCThreads == 0 || edenSize == 0) {
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throw new IllegalArgumentException("Parameters should not be 0");
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}
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this.wastePct = wastePct;
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this.plabSize = plabSize;
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this.chunkSize = chunkSize;
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this.parGCThreads = parGCThreads;
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this.edenSize = edenSize;
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this.plabIsFixed = plabIsFixed;
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this.objectsAreReachable = objectsAreReachable;
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this.promotedByPLAB = promotedByPLAB;
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}
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/**
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* Convert current TestCase to List of options.
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* Assume test will fill half of existed eden.
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*
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* @return
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* List of options
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*/
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public List<String> toOptions() {
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return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
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"-XX:ParallelGCBufferWastePct=" + wastePct,
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"-XX:OldPLABSize=" + plabSize,
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"-XX:YoungPLABSize=" + plabSize,
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"-XX:" + (plabIsFixed ? "-" : "+") + "ResizePLAB",
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"-Dchunk.size=" + chunkSize,
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"-Dreachable=" + objectsAreReachable,
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"-XX:NewSize=" + edenSize + "m",
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"-XX:MaxNewSize=" + edenSize + "m",
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"-Dmem.to.fill=" + getMemToFill()
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);
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}
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/**
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* Print details about test case.
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*/
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public void print(PrintStream out) {
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boolean expectPLABAllocation = promotedByPLAB && objectsAreReachable;
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boolean expectDirectAllocation = (!promotedByPLAB) && objectsAreReachable;
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out.println("Test case details:");
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out.println(" Young gen size : " + edenSize + "M");
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out.println(" Predefined PLAB size : " + plabSize);
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out.println(" Parallel GC buffer waste pct : " + wastePct);
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out.println(" Chunk size : " + chunkSize);
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out.println(" Parallel GC threads : " + parGCThreads);
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out.println(" Objects are created : " + (objectsAreReachable ? "reachable" : "unreachable"));
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out.println(" PLAB size is fixed: " + (plabIsFixed ? "yes" : "no"));
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out.println("Test expectations:");
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out.println(" PLAB allocation : " + (expectPLABAllocation ? "expected" : "unexpected"));
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out.println(" Direct allocation : " + (expectDirectAllocation ? "expected" : "unexpected"));
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}
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/**
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* @return
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* true if we expect PLAB allocation
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* false if no
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*/
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public boolean isPromotedByPLAB() {
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return promotedByPLAB;
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}
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/**
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* @return
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* true if it is test case for unreachable objects
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* false for live objects
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*/
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public boolean isDeadObjectCase() {
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return !objectsAreReachable;
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}
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/**
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* Returns amount of memory to fill
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*
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* @return amount of memory
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*/
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public long getMemToFill() {
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return (long) (edenSize) * 1024l * 1024l / 2;
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}
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}
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}
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