| /* |
| * 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 TestNewRatioFlag |
| * @key gc |
| * @bug 8025166 |
| * @summary Verify that heap devided among generations according to NewRatio |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run driver TestNewRatioFlag |
| */ |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.LinkedList; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.Utils; |
| import sun.hotspot.WhiteBox; |
| |
| public class TestNewRatioFlag { |
| |
| public static final long M = 1024 * 1024; |
| public static final long HEAP_SIZE = 100 * M; |
| |
| public static void main(String args[]) throws Exception { |
| LinkedList<String> options = new LinkedList<>( |
| Arrays.asList(Utils.getFilteredTestJavaOpts("(-XX:[^ ]*NewSize=[^ ]+)|(-Xm[ns][^ ]+)")) |
| ); |
| |
| testNewRatio(4, options); |
| testNewRatio(6, options); |
| testNewRatio(10, options); |
| testNewRatio(15, options); |
| testNewRatio(20, options); |
| } |
| |
| /** |
| * Verify that actual size of young gen conforms specified NewRatio |
| * |
| * @param ratio value of NewRatio option |
| * @param options additional options for VM |
| */ |
| public static void testNewRatio(int ratio, LinkedList<String> options) throws Exception { |
| LinkedList<String> vmOptions = new LinkedList<>(options); |
| Collections.addAll(vmOptions, |
| "-Xbootclasspath/a:.", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+WhiteBoxAPI", |
| "-XX:GCLockerEdenExpansionPercent=0", |
| "-Xmx" + HEAP_SIZE, |
| "-Xms" + HEAP_SIZE, |
| "-XX:NewRatio=" + ratio, |
| "-XX:-UseLargePages", |
| NewRatioVerifier.class.getName(), |
| Integer.toString(ratio) |
| ); |
| |
| ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()])); |
| OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start()); |
| analyzer.shouldHaveExitValue(0); |
| System.out.println(analyzer.getOutput()); |
| } |
| |
| public static class NewRatioVerifier { |
| |
| static WhiteBox wb = WhiteBox.getWhiteBox(); |
| |
| public static void main(String args[]) { |
| if (args.length != 1) { |
| throw new IllegalArgumentException("Expected 1 arg: <expectedRatio>"); |
| } |
| int expectedRatio = Integer.valueOf(args[0]); |
| switch (GCTypes.YoungGCType.getYoungGCType()) { |
| case DefNew: |
| case ParNew: |
| verifyDefNewNewRatio(expectedRatio); |
| break; |
| case PSNew: |
| verifyPSNewRatio(expectedRatio); |
| break; |
| case G1: |
| verifyG1NewRatio(expectedRatio); |
| break; |
| default: |
| throw new RuntimeException("Unexpected young GC type"); |
| } |
| } |
| |
| /** |
| * Verify NewSize for DefNew and ParNew collectors. |
| * |
| * Compare expected NewSize calculated according to sizing policies used by DefNew |
| * with NewSize value reported by MemoryPoolMXBeans. |
| */ |
| public static void verifyDefNewNewRatio(int expectedRatio) { |
| long initEden = HeapRegionUsageTool.getEdenUsage().getInit(); |
| long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit(); |
| long initOld = HeapRegionUsageTool.getOldUsage().getInit(); |
| |
| long newSize = initEden + 2 * initSurv; |
| |
| long expectedNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio, |
| wb.getHeapSpaceAlignment()); |
| |
| if (expectedNewSize != newSize) { |
| throw new RuntimeException("Expected young gen size is: " + expectedNewSize |
| + ", but observed new size is: " + newSize); |
| } |
| } |
| |
| /** |
| * Verify NewSize for PS collector. |
| * Expected NewSize calculated according to alignment policies used by PS |
| * and then compared with actual NewSize obtained from MemoryPoolMXBeans. |
| */ |
| public static void verifyPSNewRatio(int expectedRatio) { |
| long initEden = HeapRegionUsageTool.getEdenUsage().getInit(); |
| long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit(); |
| long initOld = HeapRegionUsageTool.getOldUsage().getInit(); |
| |
| long newSize = initEden + 2 * initSurv; |
| |
| long alignedDownNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio, |
| wb.getHeapSpaceAlignment()); |
| long expectedNewSize = HeapRegionUsageTool.alignUp(alignedDownNewSize, |
| wb.psVirtualSpaceAlignment()); |
| |
| if (expectedNewSize != newSize) { |
| throw new RuntimeException("Expected young gen size is: " + expectedNewSize |
| + ", but observed new size is: " + newSize); |
| } |
| } |
| |
| /** |
| * Verify NewSize for G1 GC. |
| * Amount of young regions calculated according to sizing policies used by G1 |
| * and then compared with actual number of young regions derived from |
| * values reported by MemoryPoolMXBeans and region size. |
| */ |
| public static void verifyG1NewRatio(int expectedRatio) { |
| long initEden = HeapRegionUsageTool.getEdenUsage().getInit(); |
| long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit(); |
| long maxOld = HeapRegionUsageTool.getOldUsage().getMax(); |
| |
| int regionSize = wb.g1RegionSize(); |
| int youngListLength = (int) ((initEden + initSurv) / regionSize); |
| int maxRegions = (int) (maxOld / regionSize); |
| int expectedYoungListLength = (int) (maxRegions / (double) (expectedRatio + 1)); |
| |
| if (youngListLength != expectedYoungListLength) { |
| throw new RuntimeException("Expected G1 young list length is: " + expectedYoungListLength |
| + ", but observed young list length is: " + youngListLength); |
| } |
| } |
| } |
| } |