| /* |
| * Copyright (c) 2018, 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 nsk.stress.jni; |
| |
| class GarbageGenerator extends Thread { |
| class Garbage { |
| Garbage() { |
| this(1024); |
| } |
| |
| Garbage(int m) { |
| memory = new byte[m]; |
| } |
| |
| void setNext(Garbage n) { |
| next = n; |
| } |
| |
| Garbage getNext() { |
| return next; |
| } |
| |
| protected void finalize() { |
| } |
| |
| private Garbage next; |
| private byte[] memory; |
| } |
| |
| class GarbageRing { |
| GarbageRing() { |
| attachment = new Garbage(0); |
| } |
| |
| void add(int size) { |
| Garbage head = attachment.getNext(); |
| Garbage g = new Garbage(size); |
| if (head != null) { |
| Garbage oldNext = head.getNext(); |
| if (oldNext != null) { |
| g.setNext(oldNext); |
| head.setNext(g); |
| attachment.setNext(g); |
| } else { |
| g.setNext(head); |
| head.setNext(g); |
| } |
| } else |
| attachment.setNext(g); |
| } |
| |
| void discard() { |
| attachment.setNext(null); |
| } |
| |
| private byte[] memory; |
| private Garbage attachment; |
| } |
| |
| public void run() { |
| GarbageRing gr = new GarbageRing(); |
| int g = 0; |
| while (!done) { |
| for (g = 0; g < ringSize; g++) { |
| gr.add(allocSize); |
| yield(); |
| } |
| gr.discard(); |
| try { |
| sleep(interval); |
| } catch (InterruptedException e) { |
| } |
| } |
| if (DEBUG) System.out.println("GarbageRing::run(): done"); |
| } |
| |
| public void setAllocSize(int i) { |
| allocSize = i; |
| } |
| |
| public int getAllocSize() { |
| return allocSize; |
| } |
| |
| public void setInterval(int i) { |
| interval = i; |
| } |
| |
| public int getInterval() { |
| return interval; |
| } |
| |
| public void halt() { |
| done = true; |
| } |
| |
| private int allocSize = 10000; |
| private int ringSize = 50; |
| private int interval = 1000; |
| private boolean done = false; |
| final private static boolean DEBUG = false; |
| } |