--- a/hotspot/test/serviceability/tmtools/jstat/utils/GcProvokerImpl.java Mon Jan 09 19:36:47 2017 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,113 +0,0 @@
-/*
- * 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.
- */
-package utils;
-
-import java.lang.management.ManagementFactory;
-import java.lang.management.MemoryPoolMXBean;
-import java.lang.management.MemoryUsage;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- *
- * Utilities to provoke GC in various ways
- */
-public class GcProvokerImpl implements GcProvoker {
-
- private static List<Object> eatenMetaspace;
- private static List<Object> eatenMemory;
-
- static List<Object> eatHeapMemory(float targetUsage) {
- long maxMemory = Runtime.getRuntime().maxMemory();
- // uses fixed small objects to avoid Humongous objects allocation in G1
- int memoryChunk = 2048;
- List<Object> list = new ArrayList<>();
- long used = 0;
- long target = (long) (maxMemory * targetUsage);
- while (used < target) {
- try {
- list.add(new byte[memoryChunk]);
- used += memoryChunk;
- } catch (OutOfMemoryError e) {
- list = null;
- throw new RuntimeException("Unexpected OOME '" + e.getMessage() + "' while eating " + targetUsage + " of heap memory.");
- }
- }
- return list;
- }
-
- @Override
- public void provokeGc() {
- for (int i = 0; i < 3; i++) {
- long edenSize = Pools.getEdenCommittedSize();
- long heapSize = Pools.getHeapCommittedSize();
- float targetPercent = ((float) edenSize) / (heapSize);
- if ((targetPercent < 0) || (targetPercent > 1.0)) {
- throw new RuntimeException("Error in the percent calculation" + " (eden size: " + edenSize + ", heap size: " + heapSize + ", calculated eden percent: " + targetPercent + ")");
- }
- eatHeapMemory(targetPercent);
- eatHeapMemory(targetPercent);
- System.gc();
- }
- }
-
- @Override
- public void eatMetaspaceAndHeap(float targetMemoryUsagePercent) {
- // Metaspace should be filled before Java Heap to prevent unexpected OOME
- // in the Java Heap while filling Metaspace
- eatenMetaspace = eatMetaspace(targetMemoryUsagePercent);
- eatenMemory = eatHeapMemory(targetMemoryUsagePercent);
- }
-
- private static List<Object> eatMetaspace(float targetUsage) {
- List<Object> list = new ArrayList<>();
- final String metaspacePoolName = "Metaspace";
- MemoryPoolMXBean metaspacePool = null;
- for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
- if (pool.getName().contains(metaspacePoolName)) {
- metaspacePool = pool;
- break;
- }
- }
- if (metaspacePool == null) {
- throw new RuntimeException("MXBean for Metaspace pool wasn't found");
- }
- float currentUsage;
- GeneratedClassProducer gp = new GeneratedClassProducer();
- do {
- try {
- list.add(gp.create(0));
- } catch (OutOfMemoryError oome) {
- list = null;
- throw new RuntimeException("Unexpected OOME '" + oome.getMessage() + "' while eating " + targetUsage + " of Metaspace.");
- }
- MemoryUsage memoryUsage = metaspacePool.getUsage();
- currentUsage = (((float) memoryUsage.getUsed()) / memoryUsage.getMax());
- } while (currentUsage < targetUsage);
- return list;
- }
-
- public GcProvokerImpl() {
- }
-
-}