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 /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build sun.hotspot.WhiteBox
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run driver TestMinAndInitialSurvivorRatioFlags
34 */
35
36 import java.lang.management.MemoryUsage;
37 import java.util.Arrays;
38 import java.util.Collections;
39 import java.util.LinkedList;
40 import jdk.test.lib.process.OutputAnalyzer;
41 import jdk.test.lib.process.ProcessTools;
42 import jdk.test.lib.Utils;
43 import sun.hotspot.WhiteBox;
44
45 /* Test verifies that VM can start with any GC when MinSurvivorRatio and
46 * InitialSurvivorRatio flags passed and for Parallel GC it verifies that
47 * after start up survivor ratio equal to InitialSurvivorRatio value and
48 * that actual survivor ratio will never be less than MinSurvivorRatio.
49 */
50 public class TestMinAndInitialSurvivorRatioFlags {
51
52 public static final long M = 1024 * 1024;
53 public static final long HEAP_SIZE = 200 * M;
54 public static final long NEW_SIZE = 100 * M;
55
56 public static void main(String args[]) throws Exception {
57 LinkedList<String> options = new LinkedList<>(
58 Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*SurvivorRatio=[^ ]+"))
59 );
60
61 testSurvivorRatio(5, -1, -1, options, true);
62 testSurvivorRatio(10, -1, -1, options, true);
63 testSurvivorRatio(-1, 5, 3, options, true);
64 testSurvivorRatio(-1, 15, 3, options, true);
65 testSurvivorRatio(-1, 15, 3, options, false);
66 testSurvivorRatio(-1, 10, 10, options, true);
67 testSurvivorRatio(-1, 3, 15, options, true);
68 testSurvivorRatio(-1, 3, 15, options, false);
69 }
70
71 /**
72 * Test that MinSurvivorRatio and InitialSurvivorRatio flags work.
73 *
74 * @param survivorRatio value for -XX:SurvivorRatio option, omitted if negative
75 * @param initRatio value for -XX:InitialSurvivorRatio option, omitted if negative
76 * @param minRatio value for -XX:MinSurvivorRatio option, omitted if negative
77 * @param options additional options for VM
78 * @param useAdaptiveSizePolicy turn on or off UseAdaptiveSizePolicy option
79 */
80 public static void testSurvivorRatio(int survivorRatio,
81 int initRatio,
82 int minRatio,
83 LinkedList<String> options,
84 boolean useAdaptiveSizePolicy) throws Exception {
85
86 LinkedList<String> vmOptions = new LinkedList<>(options);
87 Collections.addAll(vmOptions,
88 "-Xbootclasspath/a:.",
89 "-XX:+UnlockDiagnosticVMOptions",
90 "-XX:+WhiteBoxAPI",
91 "-XX:MaxNewSize=" + NEW_SIZE, "-XX:NewSize=" + NEW_SIZE,
92 "-Xmx" + HEAP_SIZE, "-Xms" + HEAP_SIZE,
93 (survivorRatio >= 0 ? "-XX:SurvivorRatio=" + survivorRatio : ""),
94 (initRatio >= 0 ? "-XX:InitialSurvivorRatio=" + initRatio : ""),
95 (minRatio >= 0 ? "-XX:MinSurvivorRatio=" + minRatio : ""),
96 (useAdaptiveSizePolicy ? "-XX:+UseAdaptiveSizePolicy" : "-XX:-UseAdaptiveSizePolicy"),
97 SurvivorRatioVerifier.class.getName(),
98 Integer.toString(survivorRatio),
99 Integer.toString(initRatio),
100 Integer.toString(minRatio),
101 Boolean.toString(useAdaptiveSizePolicy)
102 );
103 vmOptions.removeIf((String p) -> p.isEmpty());
104 ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()]));
105 OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start());
106 analyzer.shouldHaveExitValue(0);
107 }
108
109 /**
110 * Class that verifies survivor ratio.
111 * Will be executed in tested VM. Checks initial size of eden and survivor paces with alignment.
112 */
113 public static class SurvivorRatioVerifier {
114
115 public static WhiteBox wb = WhiteBox.getWhiteBox();
116
117 public static final int MAX_ITERATIONS = 10;
118 public static final int ARRAY_LENGTH = 10000;
119 public static final int CHUNK_SIZE = 10000;
120
121 public static byte garbage[][] = new byte[ARRAY_LENGTH][];
122
123 public static void main(String args[]) throws Exception {
124 if (args.length != 4) {
125 throw new IllegalArgumentException("Expected 4 args: <survivorRatio> <initRatio> <minRatio> <useAdaptiveSizePolicy>");
126 }
127 final int survivorRatio = Integer.valueOf(args[0]);
128 final int initRatio = Integer.valueOf(args[1]);
129 final int minRatio = Integer.valueOf(args[2]);
130 final boolean useAdaptiveSizePolicy = Boolean.valueOf(args[3]);
131
132 // we stop testing only here to ensure that JVM will accept
133 // both MinSurvivorRatio and InitialSurvivorRatio regardles to GC
134 if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.PSNew) {
135 System.out.println("Test is only applicable to Parallel GC");
136 return;
137 }
138
139 // verify initial survivor ratio
140 verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, true);
141
142 // force GC
143 AllocationHelper allocator = new AllocationHelper(MAX_ITERATIONS, ARRAY_LENGTH, CHUNK_SIZE,
144 () -> (verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, false)));
145 allocator.allocateMemoryAndVerify();
146 }
147
148 /**
149 * Verify actual survivor ratio.
150 *
151 * @param survivorRatio value of SurvivorRatio option, omitted if negative
152 * @param initRatio value of InitialSurvivorRatio option, omitted if negative
153 * @param minRatio value of MinSurvivorRatio option, omitted if negative
154 * @param useAdaptiveSizePolicy value of UseAdaptiveSizePolicy option
155 * @param verifyInitialRatio true if we are going to verify initial ratio
156 */
157 public static Void verifySurvivorRatio(int survivorRatio,
158 int initRatio,
159 int minRatio,
160 boolean useAdaptiveSizePolicy,
161 boolean verifyInitialRatio) {
162
163 MemoryUsage edenUsage = HeapRegionUsageTool.getEdenUsage();
164 MemoryUsage survivorUsage = HeapRegionUsageTool.getSurvivorUsage();
165
166 long alignedNewSize = edenUsage.getMax() + 2 * survivorUsage.getMax();
167 long generationAlignment = wb.psHeapGenerationAlignment();
168
169 if (survivorRatio >= 0) {
170 // -XX:SurvivorRatio was passed to JVM, actual ratio should be SurvivorRatio + 2
171 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / (survivorRatio + 2),
172 generationAlignment);
173
174 if (survivorUsage.getCommitted() != expectedSize) {
175 throw new RuntimeException("Expected survivor size is: " + expectedSize
176 + ", but observed size is: " + survivorUsage.getCommitted());
177 }
178 } else if (verifyInitialRatio || !useAdaptiveSizePolicy) {
179 // In case of initial ratio verification or disabled adaptive size policy
180 // ratio should be equal to InitialSurvivorRatio value
181 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio,
182 generationAlignment);
183 if (survivorUsage.getCommitted() != expectedSize) {
184 throw new RuntimeException("Expected survivor size is: " + expectedSize
185 + ", but observed size is: " + survivorUsage.getCommitted());
186 }
187 } else {
188 // In any other case actual survivor ratio should not be lower than MinSurvivorRatio
189 // or is should be equal to InitialSurvivorRatio
190 long expectedMinSize = HeapRegionUsageTool.alignDown(alignedNewSize / minRatio,
191 generationAlignment);
192 long expectedInitSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio,
193 generationAlignment);
194 if (survivorUsage.getCommitted() != expectedInitSize
195 && survivorUsage.getCommitted() < expectedMinSize) {
196 throw new RuntimeException("Expected survivor size should be " + expectedMinSize
197 + " or should be greater then " + expectedMinSize
198 + ", but observer survivor size is " + survivorUsage.getCommitted());
199 }
200 }
201 return null;
202 }
203 }
204 }