| /* |
| * Copyright (c) 2015, 2016, 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 /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run driver TestMinAndInitialSurvivorRatioFlags |
| */ |
| |
| import java.lang.management.MemoryUsage; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.LinkedList; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.process.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<String> 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<String> options, |
| boolean useAdaptiveSizePolicy) throws Exception { |
| |
| LinkedList<String> 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: <survivorRatio> <initRatio> <minRatio> <useAdaptiveSizePolicy>"); |
| } |
| 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; |
| } |
| } |
| } |
