| /* |
| * Copyright (c) 2007, 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.share.gc.gp; |
| |
| import nsk.share.TestBug; |
| |
| /** |
| * This class encapsulates notions like "many objects of small size", |
| * "small number of objects of big size". |
| */ |
| public abstract class MemoryStrategy { |
| private static int smallNumber = 100; |
| public abstract long getSize(long memory); |
| public abstract long getSize(long memory, long objectExtra); |
| public abstract int getCount(long memory); |
| public abstract int getCount(long memory, long objectExtra); |
| |
| protected MemoryStrategy() { |
| } |
| |
| /** |
| * Small object size, big number of objects. |
| */ |
| public static final MemoryStrategy LOW = new MemoryStrategy() { |
| public long getSize(long memory) { |
| return getSize(memory, 0); |
| } |
| |
| public long getSize(long memory, long objectExtra) { |
| return smallNumber; |
| } |
| |
| public int getCount(long memory) { |
| return getCount(memory, 0); |
| } |
| |
| public int getCount(long memory, long objectExtra) { |
| return (int) Math.min(Integer.MAX_VALUE, memory / (getSize(memory) + objectExtra)); |
| } |
| |
| public String toString() { |
| return "low"; |
| } |
| }; |
| |
| /** |
| * Medium object size, medium number of objects. |
| */ |
| public static final MemoryStrategy MEDIUM = new MemoryStrategy() { |
| public long getSize(long memory) { |
| return getSize(memory, 0); |
| } |
| |
| public long getSize(long memory, long objectExtra) { |
| return Math.round(Math.floor(Math.sqrt(memory))); |
| } |
| |
| public int getCount(long memory) { |
| return getCount(memory, 0); |
| } |
| |
| public int getCount(long memory, long objectExtra) { |
| return (int) Math.min(Integer.MAX_VALUE, memory / (getSize(memory) + objectExtra)); |
| } |
| |
| public String toString() { |
| return "medium"; |
| } |
| }; |
| |
| /** |
| * Big object size, small number of objects. |
| */ |
| public static final MemoryStrategy HIGH = new MemoryStrategy() { |
| public long getSize(long memory) { |
| return getSize(memory, 0); |
| } |
| |
| public long getSize(long memory, long objectExtra) { |
| return memory / getCount(memory, objectExtra); |
| } |
| |
| public int getCount(long memory) { |
| return getCount(memory, 0); |
| } |
| |
| public int getCount(long memory, long objectExtra) { |
| return smallNumber; |
| } |
| |
| public String toString() { |
| return "high"; |
| } |
| }; |
| |
| /** |
| * Get memory strategy by identifier. |
| * |
| * @param id identifier |
| * @return memory strategy for this identifier |
| * @throws TestBug if id is invalid |
| */ |
| public static MemoryStrategy fromString(String id) { |
| if (id.equalsIgnoreCase("low")) |
| return LOW; |
| else if (id.equalsIgnoreCase("medium")) |
| return MEDIUM; |
| else if (id.equalsIgnoreCase("high")) |
| return HIGH; |
| else |
| throw new TestBug("Unknown memory strategy identifier: " + id); |
| } |
| } |