/* * 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 TestMinAndInitialSurvivorRatioFlags * @key gc * @summary Verify that MinSurvivorRatio and InitialSurvivorRatio flags work * @library /testlibrary /test/lib * @modules java.base/sun.misc * java.management * @build TestMinAndInitialSurvivorRatioFlags * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run driver TestMinAndInitialSurvivorRatioFlags */ import jdk.test.lib.AllocationHelper; import java.lang.management.MemoryUsage; import java.util.Arrays; import java.util.Collections; import java.util.LinkedList; import jdk.test.lib.HeapRegionUsageTool; import jdk.test.lib.OutputAnalyzer; import jdk.test.lib.ProcessTools; import jdk.test.lib.Utils; import sun.hotspot.WhiteBox; /* Test verifies that VM can start with any GC when MinSurvivorRatio and * InitialSurvivorRatio flags passed and for Parallel GC it verifies that * after start up survivor ratio equal to InitialSurvivorRatio value and * that actual survivor ratio will never be less than MinSurvivorRatio. */ public class TestMinAndInitialSurvivorRatioFlags { public static final long M = 1024 * 1024; public static final long HEAP_SIZE = 200 * M; public static final long NEW_SIZE = 100 * M; public static void main(String args[]) throws Exception { LinkedList options = new LinkedList<>( Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*SurvivorRatio=[^ ]+")) ); testSurvivorRatio(5, -1, -1, options, true); testSurvivorRatio(10, -1, -1, options, true); testSurvivorRatio(-1, 5, 3, options, true); testSurvivorRatio(-1, 15, 3, options, true); testSurvivorRatio(-1, 15, 3, options, false); testSurvivorRatio(-1, 10, 10, options, true); testSurvivorRatio(-1, 3, 15, options, true); testSurvivorRatio(-1, 3, 15, options, false); } /** * Test that MinSurvivorRatio and InitialSurvivorRatio flags work. * * @param survivorRatio value for -XX:SurvivorRatio option, omitted if negative * @param initRatio value for -XX:InitialSurvivorRatio option, omitted if negative * @param minRatio value for -XX:MinSurvivorRatio option, omitted if negative * @param options additional options for VM * @param useAdaptiveSizePolicy turn on or off UseAdaptiveSizePolicy option */ public static void testSurvivorRatio(int survivorRatio, int initRatio, int minRatio, LinkedList options, boolean useAdaptiveSizePolicy) throws Exception { LinkedList vmOptions = new LinkedList<>(options); Collections.addAll(vmOptions, "-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", "-XX:MaxNewSize=" + NEW_SIZE, "-XX:NewSize=" + NEW_SIZE, "-Xmx" + HEAP_SIZE, "-Xms" + HEAP_SIZE, (survivorRatio >= 0 ? "-XX:SurvivorRatio=" + survivorRatio : ""), (initRatio >= 0 ? "-XX:InitialSurvivorRatio=" + initRatio : ""), (minRatio >= 0 ? "-XX:MinSurvivorRatio=" + minRatio : ""), (useAdaptiveSizePolicy ? "-XX:+UseAdaptiveSizePolicy" : "-XX:-UseAdaptiveSizePolicy"), SurvivorRatioVerifier.class.getName(), Integer.toString(survivorRatio), Integer.toString(initRatio), Integer.toString(minRatio), Boolean.toString(useAdaptiveSizePolicy) ); vmOptions.removeIf((String p) -> p.isEmpty()); ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()])); OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start()); analyzer.shouldHaveExitValue(0); } /** * Class that verifies survivor ratio. * Will be executed in tested VM. Checks initial size of eden and survivor paces with alignment. */ public static class SurvivorRatioVerifier { public static WhiteBox wb = WhiteBox.getWhiteBox(); public static final int MAX_ITERATIONS = 10; public static final int ARRAY_LENGTH = 10000; public static final int CHUNK_SIZE = 10000; public static byte garbage[][] = new byte[ARRAY_LENGTH][]; public static void main(String args[]) throws Exception { if (args.length != 4) { throw new IllegalArgumentException("Expected 4 args: "); } final int survivorRatio = Integer.valueOf(args[0]); final int initRatio = Integer.valueOf(args[1]); final int minRatio = Integer.valueOf(args[2]); final boolean useAdaptiveSizePolicy = Boolean.valueOf(args[3]); // we stop testing only here to ensure that JVM will accept // both MinSurvivorRatio and InitialSurvivorRatio regardles to GC if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.PSNew) { System.out.println("Test is only applicable to Parallel GC"); return; } // verify initial survivor ratio verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, true); // force GC AllocationHelper allocator = new AllocationHelper(MAX_ITERATIONS, ARRAY_LENGTH, CHUNK_SIZE, () -> (verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, false))); allocator.allocateMemoryAndVerify(); } /** * Verify actual survivor ratio. * * @param survivorRatio value of SurvivorRatio option, omitted if negative * @param initRatio value of InitialSurvivorRatio option, omitted if negative * @param minRatio value of MinSurvivorRatio option, omitted if negative * @param useAdaptiveSizePolicy value of UseAdaptiveSizePolicy option * @param verifyInitialRatio true if we are going to verify initial ratio */ public static Void verifySurvivorRatio(int survivorRatio, int initRatio, int minRatio, boolean useAdaptiveSizePolicy, boolean verifyInitialRatio) { MemoryUsage edenUsage = HeapRegionUsageTool.getEdenUsage(); MemoryUsage survivorUsage = HeapRegionUsageTool.getSurvivorUsage(); long alignedNewSize = edenUsage.getMax() + 2 * survivorUsage.getMax(); long generationAlignment = wb.psHeapGenerationAlignment(); if (survivorRatio >= 0) { // -XX:SurvivorRatio was passed to JVM, actual ratio should be SurvivorRatio + 2 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / (survivorRatio + 2), generationAlignment); if (survivorUsage.getCommitted() != expectedSize) { throw new RuntimeException("Expected survivor size is: " + expectedSize + ", but observed size is: " + survivorUsage.getCommitted()); } } else if (verifyInitialRatio || !useAdaptiveSizePolicy) { // In case of initial ratio verification or disabled adaptive size policy // ratio should be equal to InitialSurvivorRatio value long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio, generationAlignment); if (survivorUsage.getCommitted() != expectedSize) { throw new RuntimeException("Expected survivor size is: " + expectedSize + ", but observed size is: " + survivorUsage.getCommitted()); } } else { // In any other case actual survivor ratio should not be lower than MinSurvivorRatio // or is should be equal to InitialSurvivorRatio long expectedMinSize = HeapRegionUsageTool.alignDown(alignedNewSize / minRatio, generationAlignment); long expectedInitSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio, generationAlignment); if (survivorUsage.getCommitted() != expectedInitSize && survivorUsage.getCommitted() < expectedMinSize) { throw new RuntimeException("Expected survivor size should be " + expectedMinSize + " or should be greater then " + expectedMinSize + ", but observer survivor size is " + survivorUsage.getCommitted()); } } return null; } } }