1 /*
2 * Copyright (c) 2015, 2016, 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 TestNewRatioFlag
26 * @key gc
27 * @bug 8025166
28 * @summary Verify that heap devided among generations according to NewRatio
29 * @library /test/lib
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 * @build sun.hotspot.WhiteBox
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 * @run driver TestNewRatioFlag
35 */
36
37 import java.util.Arrays;
38 import java.util.Collections;
39 import java.util.LinkedList;
40 import jdk.test.lib.process.ProcessTools;
41 import jdk.test.lib.process.OutputAnalyzer;
42 import jdk.test.lib.Utils;
43 import sun.hotspot.WhiteBox;
44
45 public class TestNewRatioFlag {
46
47 public static final long M = 1024 * 1024;
48 public static final long HEAP_SIZE = 100 * M;
49
50 public static void main(String args[]) throws Exception {
51 LinkedList<String> options = new LinkedList<>(
52 Arrays.asList(Utils.getFilteredTestJavaOpts("(-XX:[^ ]*NewSize=[^ ]+)|(-Xm[ns][^ ]+)"))
53 );
54
55 testNewRatio(4, options);
56 testNewRatio(6, options);
57 testNewRatio(10, options);
58 testNewRatio(15, options);
59 testNewRatio(20, options);
60 }
61
62 /**
63 * Verify that actual size of young gen conforms specified NewRatio
64 *
65 * @param ratio value of NewRatio option
66 * @param options additional options for VM
67 */
68 public static void testNewRatio(int ratio, LinkedList<String> options) throws Exception {
69 LinkedList<String> vmOptions = new LinkedList<>(options);
70 Collections.addAll(vmOptions,
71 "-Xbootclasspath/a:.",
72 "-XX:+UnlockDiagnosticVMOptions",
73 "-XX:+WhiteBoxAPI",
74 "-XX:GCLockerEdenExpansionPercent=0",
75 "-Xmx" + HEAP_SIZE,
76 "-Xms" + HEAP_SIZE,
77 "-XX:NewRatio=" + ratio,
78 "-XX:-UseLargePages",
79 NewRatioVerifier.class.getName(),
80 Integer.toString(ratio)
81 );
82
83 ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()]));
84 OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start());
85 analyzer.shouldHaveExitValue(0);
86 System.out.println(analyzer.getOutput());
87 }
88
89 public static class NewRatioVerifier {
90
91 static WhiteBox wb = WhiteBox.getWhiteBox();
92
93 public static void main(String args[]) {
94 if (args.length != 1) {
95 throw new IllegalArgumentException("Expected 1 arg: <expectedRatio>");
96 }
97 int expectedRatio = Integer.valueOf(args[0]);
98 switch (GCTypes.YoungGCType.getYoungGCType()) {
99 case DefNew:
100 case ParNew:
101 verifyDefNewNewRatio(expectedRatio);
102 break;
103 case PSNew:
104 verifyPSNewRatio(expectedRatio);
105 break;
106 case G1:
107 verifyG1NewRatio(expectedRatio);
108 break;
109 default:
110 throw new RuntimeException("Unexpected young GC type");
111 }
112 }
113
114 /**
115 * Verify NewSize for DefNew and ParNew collectors.
116 *
117 * Compare expected NewSize calculated according to sizing policies used by DefNew
118 * with NewSize value reported by MemoryPoolMXBeans.
119 */
120 public static void verifyDefNewNewRatio(int expectedRatio) {
121 long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
122 long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
123 long initOld = HeapRegionUsageTool.getOldUsage().getInit();
124
125 long newSize = initEden + 2 * initSurv;
126
127 long expectedNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio,
128 wb.getHeapSpaceAlignment());
129
130 if (expectedNewSize != newSize) {
131 throw new RuntimeException("Expected young gen size is: " + expectedNewSize
132 + ", but observed new size is: " + newSize);
133 }
134 }
135
136 /**
137 * Verify NewSize for PS collector.
138 * Expected NewSize calculated according to alignment policies used by PS
139 * and then compared with actual NewSize obtained from MemoryPoolMXBeans.
140 */
141 public static void verifyPSNewRatio(int expectedRatio) {
142 long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
143 long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
144 long initOld = HeapRegionUsageTool.getOldUsage().getInit();
145
146 long newSize = initEden + 2 * initSurv;
147
148 long alignedDownNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio,
149 wb.getHeapSpaceAlignment());
150 long expectedNewSize = HeapRegionUsageTool.alignUp(alignedDownNewSize,
151 wb.psVirtualSpaceAlignment());
152
153 if (expectedNewSize != newSize) {
154 throw new RuntimeException("Expected young gen size is: " + expectedNewSize
155 + ", but observed new size is: " + newSize);
156 }
157 }
158
159 /**
160 * Verify NewSize for G1 GC.
161 * Amount of young regions calculated according to sizing policies used by G1
162 * and then compared with actual number of young regions derived from
163 * values reported by MemoryPoolMXBeans and region size.
164 */
165 public static void verifyG1NewRatio(int expectedRatio) {
166 long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
167 long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
168 long maxOld = HeapRegionUsageTool.getOldUsage().getMax();
169
170 int regionSize = wb.g1RegionSize();
171 int youngListLength = (int) ((initEden + initSurv) / regionSize);
172 int maxRegions = (int) (maxOld / regionSize);
173 int expectedYoungListLength = (int) (maxRegions / (double) (expectedRatio + 1));
174
175 if (youngListLength != expectedYoungListLength) {
176 throw new RuntimeException("Expected G1 young list length is: " + expectedYoungListLength
177 + ", but observed young list length is: " + youngListLength);
178 }
179 }
180 }
181 }