1 /*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test TestMinAndInitialSurvivorRatioFlags
26 * @key gc
27 * @summary Verify that MinSurvivorRatio and InitialSurvivorRatio flags work
28 * @library /testlibrary /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build TestMinAndInitialSurvivorRatioFlags
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run driver TestMinAndInitialSurvivorRatioFlags
34 */
35
36 import jdk.test.lib.AllocationHelper;
37 import java.lang.management.MemoryUsage;
38 import java.util.Arrays;
39 import java.util.Collections;
40 import java.util.LinkedList;
41 import jdk.test.lib.HeapRegionUsageTool;
42 import jdk.test.lib.OutputAnalyzer;
43 import jdk.test.lib.ProcessTools;
44 import jdk.test.lib.Utils;
45 import sun.hotspot.WhiteBox;
46
47 /* Test verifies that VM can start with any GC when MinSurvivorRatio and
48 * InitialSurvivorRatio flags passed and for Parallel GC it verifies that
49 * after start up survivor ratio equal to InitialSurvivorRatio value and
50 * that actual survivor ratio will never be less than MinSurvivorRatio.
51 */
52 public class TestMinAndInitialSurvivorRatioFlags {
53
54 public static final long M = 1024 * 1024;
55 public static final long HEAP_SIZE = 200 * M;
56 public static final long NEW_SIZE = 100 * M;
57
58 public static void main(String args[]) throws Exception {
59 LinkedList<String> options = new LinkedList<>(
60 Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*SurvivorRatio=[^ ]+"))
61 );
62
63 testSurvivorRatio(5, -1, -1, options, true);
64 testSurvivorRatio(10, -1, -1, options, true);
65 testSurvivorRatio(-1, 5, 3, options, true);
66 testSurvivorRatio(-1, 15, 3, options, true);
67 testSurvivorRatio(-1, 15, 3, options, false);
68 testSurvivorRatio(-1, 10, 10, options, true);
69 testSurvivorRatio(-1, 3, 15, options, true);
70 testSurvivorRatio(-1, 3, 15, options, false);
71 }
72
73 /**
74 * Test that MinSurvivorRatio and InitialSurvivorRatio flags work.
75 *
76 * @param survivorRatio value for -XX:SurvivorRatio option, omitted if negative
77 * @param initRatio value for -XX:InitialSurvivorRatio option, omitted if negative
78 * @param minRatio value for -XX:MinSurvivorRatio option, omitted if negative
79 * @param options additional options for VM
80 * @param useAdaptiveSizePolicy turn on or off UseAdaptiveSizePolicy option
81 */
82 public static void testSurvivorRatio(int survivorRatio,
83 int initRatio,
84 int minRatio,
85 LinkedList<String> options,
86 boolean useAdaptiveSizePolicy) throws Exception {
87
88 LinkedList<String> vmOptions = new LinkedList<>(options);
89 Collections.addAll(vmOptions,
90 "-Xbootclasspath/a:.",
91 "-XX:+UnlockDiagnosticVMOptions",
92 "-XX:+WhiteBoxAPI",
93 "-XX:MaxNewSize=" + NEW_SIZE, "-XX:NewSize=" + NEW_SIZE,
94 "-Xmx" + HEAP_SIZE, "-Xms" + HEAP_SIZE,
95 (survivorRatio >= 0 ? "-XX:SurvivorRatio=" + survivorRatio : ""),
96 (initRatio >= 0 ? "-XX:InitialSurvivorRatio=" + initRatio : ""),
97 (minRatio >= 0 ? "-XX:MinSurvivorRatio=" + minRatio : ""),
98 (useAdaptiveSizePolicy ? "-XX:+UseAdaptiveSizePolicy" : "-XX:-UseAdaptiveSizePolicy"),
99 SurvivorRatioVerifier.class.getName(),
100 Integer.toString(survivorRatio),
101 Integer.toString(initRatio),
102 Integer.toString(minRatio),
103 Boolean.toString(useAdaptiveSizePolicy)
104 );
105 vmOptions.removeIf((String p) -> p.isEmpty());
106 ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()]));
107 OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start());
108 analyzer.shouldHaveExitValue(0);
109 }
110
111 /**
112 * Class that verifies survivor ratio.
113 * Will be executed in tested VM. Checks initial size of eden and survivor paces with alignment.
114 */
115 public static class SurvivorRatioVerifier {
116
117 public static WhiteBox wb = WhiteBox.getWhiteBox();
118
119 public static final int MAX_ITERATIONS = 10;
120 public static final int ARRAY_LENGTH = 10000;
121 public static final int CHUNK_SIZE = 10000;
122
123 public static byte garbage[][] = new byte[ARRAY_LENGTH][];
124
125 public static void main(String args[]) throws Exception {
126 if (args.length != 4) {
127 throw new IllegalArgumentException("Expected 4 args: <survivorRatio> <initRatio> <minRatio> <useAdaptiveSizePolicy>");
128 }
129 final int survivorRatio = Integer.valueOf(args[0]);
130 final int initRatio = Integer.valueOf(args[1]);
131 final int minRatio = Integer.valueOf(args[2]);
132 final boolean useAdaptiveSizePolicy = Boolean.valueOf(args[3]);
133
134 // we stop testing only here to ensure that JVM will accept
135 // both MinSurvivorRatio and InitialSurvivorRatio regardles to GC
136 if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.PSNew) {
137 System.out.println("Test is only applicable to Parallel GC");
138 return;
139 }
140
141 // verify initial survivor ratio
142 verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, true);
143
144 // force GC
145 AllocationHelper allocator = new AllocationHelper(MAX_ITERATIONS, ARRAY_LENGTH, CHUNK_SIZE,
146 () -> (verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, false)));
147 allocator.allocateMemoryAndVerify();
148 }
149
150 /**
151 * Verify actual survivor ratio.
152 *
153 * @param survivorRatio value of SurvivorRatio option, omitted if negative
154 * @param initRatio value of InitialSurvivorRatio option, omitted if negative
155 * @param minRatio value of MinSurvivorRatio option, omitted if negative
156 * @param useAdaptiveSizePolicy value of UseAdaptiveSizePolicy option
157 * @param verifyInitialRatio true if we are going to verify initial ratio
158 */
159 public static Void verifySurvivorRatio(int survivorRatio,
160 int initRatio,
161 int minRatio,
162 boolean useAdaptiveSizePolicy,
163 boolean verifyInitialRatio) {
164
165 MemoryUsage edenUsage = HeapRegionUsageTool.getEdenUsage();
166 MemoryUsage survivorUsage = HeapRegionUsageTool.getSurvivorUsage();
167
168 long alignedNewSize = edenUsage.getMax() + 2 * survivorUsage.getMax();
169 long generationAlignment = wb.psHeapGenerationAlignment();
170
171 if (survivorRatio >= 0) {
172 // -XX:SurvivorRatio was passed to JVM, actual ratio should be SurvivorRatio + 2
173 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / (survivorRatio + 2),
174 generationAlignment);
175
176 if (survivorUsage.getCommitted() != expectedSize) {
177 throw new RuntimeException("Expected survivor size is: " + expectedSize
178 + ", but observed size is: " + survivorUsage.getCommitted());
179 }
180 } else if (verifyInitialRatio || !useAdaptiveSizePolicy) {
181 // In case of initial ratio verification or disabled adaptive size policy
182 // ratio should be equal to InitialSurvivorRatio value
183 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio,
184 generationAlignment);
185 if (survivorUsage.getCommitted() != expectedSize) {
186 throw new RuntimeException("Expected survivor size is: " + expectedSize
187 + ", but observed size is: " + survivorUsage.getCommitted());
188 }
189 } else {
190 // In any other case actual survivor ratio should not be lower than MinSurvivorRatio
191 // or is should be equal to InitialSurvivorRatio
192 long expectedMinSize = HeapRegionUsageTool.alignDown(alignedNewSize / minRatio,
193 generationAlignment);
194 long expectedInitSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio,
195 generationAlignment);
196 if (survivorUsage.getCommitted() != expectedInitSize
197 && survivorUsage.getCommitted() < expectedMinSize) {
198 throw new RuntimeException("Expected survivor size should be " + expectedMinSize
199 + " or should be greater then " + expectedMinSize
200 + ", but observer survivor size is " + survivorUsage.getCommitted());
201 }
202 }
203 return null;
204 }
205 }
206 }