1 /*
2 * Copyright (c) 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 TestPLABResize
26 * @bug 8141278
27 * @summary Test for PLAB resizing
28 * @requires vm.gc=="G1" | vm.gc=="null"
29 * @library /testlibrary /../../test/lib /
30 * @modules java.management
31 * @build ClassFileInstaller
32 * sun.hotspot.WhiteBox
33 * gc.g1.plab.lib.LogParser
34 * gc.g1.plab.lib.MemoryConsumer
35 * gc.g1.plab.lib.PLABUtils
36 * gc.g1.plab.lib.AppPLABResize
37 * @run main ClassFileInstaller sun.hotspot.WhiteBox
38 * sun.hotspot.WhiteBox$WhiteBoxPermission
39 * @run main gc.g1.plab.TestPLABResize
40 */
41 package gc.g1.plab;
42
43 import java.util.ArrayList;
44 import java.util.Arrays;
45 import java.util.List;
46 import java.util.Map;
47 import java.util.stream.Collectors;
48 import java.io.PrintStream;
49
50 import gc.g1.plab.lib.LogParser;
51 import gc.g1.plab.lib.PLABUtils;
52 import gc.g1.plab.lib.AppPLABResize;
53
54 import jdk.test.lib.OutputAnalyzer;
55 import jdk.test.lib.ProcessTools;
56
57 /**
58 * Test for PLAB resizing.
59 */
60 public class TestPLABResize {
61
62 private static final int OBJECT_SIZE_SMALL = 10;
63 private static final int OBJECT_SIZE_MEDIUM = 70;
64 private static final int OBJECT_SIZE_HIGH = 150;
65 private static final int GC_NUM_SMALL = 1;
66 private static final int GC_NUM_MEDIUM = 3;
67 private static final int GC_NUM_HIGH = 7;
68 private static final int WASTE_PCT_SMALL = 10;
69 private static final int WASTE_PCT_MEDIUM = 20;
70 private static final int WASTE_PCT_HIGH = 30;
71
72 private static final int ITERATIONS_SMALL = 3;
73 private static final int ITERATIONS_MEDIUM = 5;
74 private static final int ITERATIONS_HIGH = 8;
75
76 private final static TestCase[] TEST_CASES = {
77 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_SMALL, GC_NUM_SMALL, ITERATIONS_MEDIUM),
78 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_HIGH, ITERATIONS_SMALL),
79 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
80 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
81 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
82 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
83 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
84 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
85 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH)
86 };
87
88 public static void main(String[] args) throws Throwable {
89 for (TestCase testCase : TEST_CASES) {
90 testCase.print(System.out);
91 List<String> options = PLABUtils.prepareOptions(testCase.toOptions());
92 options.add(AppPLABResize.class.getName());
93 OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()]));
94 if (out.getExitValue() != 0) {
95 System.out.println(out.getOutput());
96 throw new RuntimeException("Exit code is not 0");
97 }
98 checkResults(out.getOutput(), testCase);
99 }
100 }
101
102 /**
103 * Checks testing results.
104 * Expected results - desired PLAB size is decreased and increased during promotion to Survivor.
105 *
106 * @param output - VM output
107 * @param testCase
108 */
109 private static void checkResults(String output, TestCase testCase) {
110 final LogParser log = new LogParser(output);
111 final Map<Long, Map<LogParser.ReportType, Map<String, Long>>> entries = log.getEntries();
112
113 final ArrayList<Long> plabSizes = entries.entrySet()
114 .stream()
115 .map(item -> {
116 return item.getValue()
117 .get(LogParser.ReportType.SURVIVOR_STATS)
118 .get("desired_plab_sz");
119 })
120 .collect(Collectors.toCollection(ArrayList::new));
121
122 // Check that desired plab size was changed during iterations.
123 // It should decrease during first half of iterations
124 // and increase after.
125 List<Long> decreasedPlabs = plabSizes.subList(testCase.getIterations(), testCase.getIterations() * 2);
126 List<Long> increasedPlabs = plabSizes.subList(testCase.getIterations() * 2, testCase.getIterations() * 3);
127
128 Long prev = decreasedPlabs.get(0);
129 for (int index = 1; index < decreasedPlabs.size(); ++index) {
130 Long current = decreasedPlabs.get(index);
131 if (prev < current) {
132 System.out.println(output);
133 throw new RuntimeException("Test failed! Expect that previous PLAB size should be greater than current. Prev.size: " + prev + " Current size:" + current);
134 }
135 prev = current;
136 }
137
138 prev = increasedPlabs.get(0);
139 for (int index = 1; index < increasedPlabs.size(); ++index) {
140 Long current = increasedPlabs.get(index);
141 if (prev > current) {
142 System.out.println(output);
143 throw new RuntimeException("Test failed! Expect that previous PLAB size should be less than current. Prev.size: " + prev + " Current size:" + current);
144 }
145 prev = current;
146 }
147
148 System.out.println("Test passed!");
149 }
150
151 /**
152 * Description of one test case.
153 */
154 private static class TestCase {
155
156 private final int wastePct;
157 private final int chunkSize;
158 private final int parGCThreads;
159 private final int iterations;
160
161 /**
162 * @param wastePct
163 * ParallelGCBufferWastePct
164 * @param chunkSize
165 * requested object size for memory consumption
166 * @param parGCThreads
167 * -XX:ParallelGCThreads
168 * @param iterations
169 *
170 */
171 public TestCase(int wastePct,
172 int chunkSize,
173 int parGCThreads,
174 int iterations
175 ) {
176 if (wastePct == 0 || chunkSize == 0 || parGCThreads == 0 || iterations == 0) {
177 throw new IllegalArgumentException("Parameters should not be 0");
178 }
179 this.wastePct = wastePct;
180
181 this.chunkSize = chunkSize;
182 this.parGCThreads = parGCThreads;
183 this.iterations = iterations;
184 }
185
186 /**
187 * Convert current TestCase to List of options.
188 *
189 * @return
190 * List of options
191 */
192 public List<String> toOptions() {
193 return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
194 "-XX:ParallelGCBufferWastePct=" + wastePct,
195 "-XX:+ResizePLAB",
196 "-Dthreads=" + parGCThreads,
197 "-Dchunk.size=" + chunkSize,
198 "-Diterations=" + iterations,
199 "-XX:NewSize=16m",
200 "-XX:MaxNewSize=16m"
201 );
202 }
203
204 /**
205 * Print details about test case.
206 */
207 public void print(PrintStream out) {
208 out.println("Test case details:");
209 out.println(" Parallel GC buffer waste pct : " + wastePct);
210 out.println(" Chunk size : " + chunkSize);
211 out.println(" Parallel GC threads : " + parGCThreads);
212 out.println(" Iterations: " + iterations);
213 }
214
215 /**
216 * @return iterations
217 */
218 public int getIterations() {
219 return iterations;
220 }
221 }
222 }