78 lines
2.9 KiB
Java
78 lines
2.9 KiB
Java
/*
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* Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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import java.util.*;
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public class AllocationProfile {
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final String name;
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// Allocation word size spread
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public final long minimumSingleAllocationSize;
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public final long maximumSingleAllocationSize;
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// dealloc probability [0.0 .. 1.0]
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public final double randomDeallocProbability;
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public AllocationProfile(String name, long minimumSingleAllocationSize, long maximumSingleAllocationSize, double randomDeallocProbability) {
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this.minimumSingleAllocationSize = minimumSingleAllocationSize;
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this.maximumSingleAllocationSize = maximumSingleAllocationSize;
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this.randomDeallocProbability = randomDeallocProbability;
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this.name = name;
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}
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/**
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* Returns random allocation size measured in words
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*/
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public long randomAllocationSize() {
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Random r = new Random();
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return r.nextInt((int)(maximumSingleAllocationSize - minimumSingleAllocationSize + 1)) + minimumSingleAllocationSize;
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}
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// Some standard profiles
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static final List<AllocationProfile> standardProfiles = new ArrayList<>();
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static {
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standardProfiles.add(new AllocationProfile("medium-range",1, 2048, 0.15));
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standardProfiles.add(new AllocationProfile("small-blocks",1, 512, 0.15));
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standardProfiles.add(new AllocationProfile("micro-blocks",1, 32, 0.15));
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}
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static AllocationProfile randomProfile() {
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return standardProfiles.get(RandomHelper.random().nextInt(standardProfiles.size()));
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}
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@Override
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public String toString() {
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return "MetaspaceTestAllocationProfile{" +
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"name='" + name + '\'' +
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", minimumSingleAllocationSize=" + minimumSingleAllocationSize +
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", maximumSingleAllocationSize=" + maximumSingleAllocationSize +
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", randomDeallocProbability=" + randomDeallocProbability +
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'}';
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}
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}
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