/* * 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 TestNewSizeFlags * @key gc * @bug 8025166 * @summary Verify that young gen size conforms values specified by NewSize, MaxNewSize and Xmn options * @library /testlibrary /test/lib * @modules java.base/jdk.internal.misc * java.management * @build TestNewSizeFlags * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run driver/timeout=240 TestNewSizeFlags */ import jdk.test.lib.AllocationHelper; import java.io.IOException; 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; public class TestNewSizeFlags { public static final long M = 1024 * 1024; public static void main(String args[]) throws Exception { LinkedList options = new LinkedList<>( Arrays.asList(Utils.getFilteredTestJavaOpts("(-Xm[nsx][^ ]+)|" + "(-XX:(Max)?((New)|" + "(Heap))((Size)|" + "(Ratio))=[^ ]+)")) ); // Test NewSize and MaxNewSize testNewSizeFlags(20 * M, 10 * M, 30 * M, 40 * M, options, false); testNewSizeFlags(10 * M, 20 * M, 30 * M, 40 * M, options, false); testNewSizeFlags(-1, 20 * M, 30 * M, 40 * M, options, false); testNewSizeFlags(10 * M, -1, 30 * M, 40 * M, options, false); testNewSizeFlags(20 * M, 20 * M, 30 * M, 40 * M, options, false); testNewSizeFlags(20 * M, 30 * M, 40 * M, 50 * M, options, false); testNewSizeFlags(30 * M, 100 * M, 150 * M, 200 * M, options, false); testNewSizeFlags(0, -1, 30 * M, 40 * M, options, false); // Test -Xmn testXmnFlags(0, 30 * M, 40 * M, options, true); testXmnFlags(20 * M, 30 * M, 40 * M, options, false); testXmnFlags(50 * M, 70 * M, 100 * M, options, false); } /** * Verify that NewSize and MaxNewSize flags affect young gen size. * * @param newSize value of NewSize option, omitted if negative * @param maxNewSize value of MaxNewSize option, omitted if negative * @param heapSize value of HeapSize option * @param maxHeapSize value of MaxHeapSize option * @param options additional options for JVM * @param failureExpected true if JVM should fail with passed heap size options */ public static void testNewSizeFlags(long newSize, long maxNewSize, long heapSize, long maxHeapSize, LinkedList options, boolean failureExpected) throws Exception { testVMOptions(newSize, maxNewSize, heapSize, maxHeapSize, newSize, (maxNewSize >= 0 ? Math.max(maxNewSize, newSize) : maxNewSize), options, failureExpected); } /** * Verify that -Xmn flag affect young gen size. * * @param mnValue value of -Xmn option * @param heapSize value of HeapSize option * @param maxHeapSize value of MaxHeapSize option * @param options additional options for JVM * @param failureExpected true if JVM should fail with passed heap size options */ public static void testXmnFlags(long mnValue, long heapSize, long maxHeapSize, LinkedList options, boolean failureExpected) throws Exception { LinkedList newOptions = new LinkedList<>(options); newOptions.add("-Xmn" + mnValue); testVMOptions(-1, -1, heapSize, maxHeapSize, mnValue, mnValue, newOptions, failureExpected); } /** * Verify that NewSize and MaxNewSize flags affect young gen size. * * @param newSize value of NewSize option, omitted if negative * @param maxNewSize value of MaxNewSize option, omitted if negative * @param heapSize value of HeapSize option * @param maxHeapSize value of MaxHeapSize option * @param expectedNewSize expected initial young gen size * @param expectedMaxNewSize expected max young gen size * @param options additional options for JVM * @param failureExpected true if JVM should fail with passed heap size options */ public static void testVMOptions(long newSize, long maxNewSize, long heapSize, long maxHeapSize, long expectedNewSize, long expectedMaxNewSize, LinkedList options, boolean failureExpected) throws Exception { OutputAnalyzer analyzer = startVM(options, newSize, maxNewSize, heapSize, maxHeapSize, expectedNewSize, expectedMaxNewSize); if (failureExpected) { analyzer.shouldHaveExitValue(1); analyzer.shouldMatch("(Error occurred during initialization of VM)|" + "(Error: Could not create the Java Virtual Machine.)"); } else { analyzer.shouldHaveExitValue(0); } } private static OutputAnalyzer startVM(LinkedList options, long newSize, long maxNewSize, long heapSize, long maxHeapSize, long expectedNewSize, long expectedMaxNewSize) throws Exception, IOException { LinkedList vmOptions = new LinkedList<>(options); Collections.addAll(vmOptions, "-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", (newSize >= 0 ? "-XX:NewSize=" + newSize : ""), (maxNewSize >= 0 ? "-XX:MaxNewSize=" + maxNewSize : ""), "-Xmx" + maxHeapSize, "-Xms" + heapSize, "-XX:GCLockerEdenExpansionPercent=0", "-XX:-UseLargePages", NewSizeVerifier.class.getName(), Long.toString(expectedNewSize), Long.toString(expectedMaxNewSize) ); vmOptions.removeIf(String::isEmpty); ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()])); OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start()); return analyzer; } /** * NewSizeVerifier checks that initial young gen size is equal to expected * regardful to alignment and that young gen size will not be greater than * expected max size. * In order to verify that young gen size will not be greater then expected * max size, NewSizeVerifier do some object allocation to force garbage * collection and heap expansion. */ public static class NewSizeVerifier { static WhiteBox wb = WhiteBox.getWhiteBox(); public static final int ARRAY_LENGTH = 100; public static final int CHUNK_SIZE = 1024; public static final int MAX_ITERATIONS = 10; public static byte garbage[][] = new byte[ARRAY_LENGTH][]; public static void main(String args[]) throws Exception { if (args.length != 2) { throw new IllegalArgumentException("Expected 2 args: "); } final long newSize = Long.valueOf(args[0]); final long maxNewSize = Long.valueOf(args[1]); // verify initial size verifyNewSize(newSize, maxNewSize); // force GC and verify that size is still correct AllocationHelper allocator = new AllocationHelper(MAX_ITERATIONS, ARRAY_LENGTH, CHUNK_SIZE, () -> (verifyNewSize(newSize, maxNewSize))); allocator.allocateMemoryAndVerifyNoOOME(); } /** * Verify that actual young gen size conforms NewSize and MaxNewSize values. */ public static Void verifyNewSize(long newSize, long maxNewSize) { long alignedNewSize = alignNewSize(newSize); long alignedMaxNewSize = alignNewSize(maxNewSize); MemoryUsage youngGenUsage = getYoungGenUsage(); if (newSize != -1) { if (youngGenUsage.getInit() < alignedNewSize) { throw new RuntimeException("initial new size < NewSize value: " + youngGenUsage.getInit() + " < " + alignedNewSize); } if (youngGenUsage.getCommitted() < alignedNewSize) { throw new RuntimeException("actual new size < NewSize value: " + youngGenUsage.getCommitted() + " < " + alignedNewSize); } // for G1 max new size == committed new size if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.G1 && youngGenUsage.getMax() < alignedNewSize) { throw new RuntimeException("max new size < NewSize value: " + youngGenUsage.getMax() + " < " + alignedNewSize); } } if (maxNewSize != -1) { if (youngGenUsage.getInit() > alignedMaxNewSize) { throw new RuntimeException("initial new size > MaxNewSize value: " + youngGenUsage.getInit() + " > " + alignedMaxNewSize); } if (youngGenUsage.getCommitted() > alignedMaxNewSize) { throw new RuntimeException("actual new size > MaxNewSize value: " + youngGenUsage.getCommitted() + " > " + alignedMaxNewSize); } if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.G1 && youngGenUsage.getMax() != alignedMaxNewSize) { throw new RuntimeException("max new size != MaxNewSize value: " + youngGenUsage.getMax() + " != " + alignedMaxNewSize); } } return null; } /** * Get young gen memory usage. * * For G1 it is EdenUsage + SurvivorUsage, * for other GCs it is EdenUsage + 2 * SurvivorUsage. * For G1 max value is just LONG_MAX. * For all GCs used value is 0. */ private static MemoryUsage getYoungGenUsage() { if (GCTypes.YoungGCType.getYoungGCType() == GCTypes.YoungGCType.G1) { return new MemoryUsage(HeapRegionUsageTool.getEdenUsage().getInit() + HeapRegionUsageTool.getSurvivorUsage().getInit(), 0, HeapRegionUsageTool.getEdenUsage().getCommitted() + HeapRegionUsageTool.getSurvivorUsage().getCommitted(), Long.MAX_VALUE); } else { return new MemoryUsage(HeapRegionUsageTool.getEdenUsage().getInit() + HeapRegionUsageTool.getSurvivorUsage().getInit() * 2, 0, HeapRegionUsageTool.getEdenUsage().getCommitted() + HeapRegionUsageTool.getSurvivorUsage().getCommitted() * 2, HeapRegionUsageTool.getEdenUsage().getMax() + HeapRegionUsageTool.getSurvivorUsage().getMax() * 2); } } /** * Align value regardful to used young GC. */ public static long alignNewSize(long value) { switch (GCTypes.YoungGCType.getYoungGCType()) { case DefNew: case ParNew: return HeapRegionUsageTool.alignDown(value, wb.getHeapSpaceAlignment()); case PSNew: return HeapRegionUsageTool.alignUp(HeapRegionUsageTool.alignDown(value, wb.getHeapSpaceAlignment()), wb.psVirtualSpaceAlignment()); case G1: return HeapRegionUsageTool.alignUp(value, wb.g1RegionSize()); default: throw new RuntimeException("Unexpected young GC type"); } } } }