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 8141141
27 * @summary Test for PLAB resizing
28 * @requires vm.gc=="G1" | vm.gc=="null"
29 * @requires vm.opt.FlightRecorder != true
30 * @library /testlibrary /test/lib /
31 * @modules java.base/jdk.internal.misc
32 * @modules java.management
33 * @build ClassFileInstaller
34 * sun.hotspot.WhiteBox
35 * gc.g1.plab.lib.LogParser
36 * gc.g1.plab.lib.MemoryConsumer
37 * gc.g1.plab.lib.PLABUtils
38 * gc.g1.plab.lib.AppPLABResize
39 * @run main ClassFileInstaller sun.hotspot.WhiteBox
40 * sun.hotspot.WhiteBox$WhiteBoxPermission
41 * @run main gc.g1.plab.TestPLABResize
42 */
43 package gc.g1.plab;
44
45 import java.util.Arrays;
46 import java.util.List;
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 import gc.g1.plab.lib.PlabReport;
54
55 import jdk.test.lib.OutputAnalyzer;
56 import jdk.test.lib.ProcessTools;
57
58 /**
59 * Test for PLAB resizing.
60 */
61 public class TestPLABResize {
62
63 private static final int OBJECT_SIZE_SMALL = 10;
64 private static final int OBJECT_SIZE_MEDIUM = 70;
65 private static final int OBJECT_SIZE_HIGH = 150;
66 private static final int GC_NUM_SMALL = 1;
67 private static final int GC_NUM_MEDIUM = 3;
68 private static final int GC_NUM_HIGH = 7;
69 private static final int WASTE_PCT_SMALL = 10;
70 private static final int WASTE_PCT_MEDIUM = 20;
71 private static final int WASTE_PCT_HIGH = 30;
72
73 private static final int ITERATIONS_SMALL = 3;
74 private static final int ITERATIONS_MEDIUM = 5;
75 private static final int ITERATIONS_HIGH = 8;
76
77 private static final String PLAB_SIZE_FIELD_NAME = "actual";
78
79 private final static TestCase[] TEST_CASES = {
80 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_SMALL, GC_NUM_SMALL, ITERATIONS_MEDIUM),
81 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_HIGH, ITERATIONS_SMALL),
82 new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
83 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
84 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
85 new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
86 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
87 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
88 new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH)
89 };
90
91 public static void main(String[] args) throws Throwable {
92 for (TestCase testCase : TEST_CASES) {
93 testCase.print(System.out);
94 List<String> options = PLABUtils.prepareOptions(testCase.toOptions());
95 options.add(AppPLABResize.class.getName());
96 OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()]));
97 PLABUtils.commonCheck(out);
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 PlabReport report = log.getEntries();
112
113 final List<Long> plabSizes = report.entryStream()
114 .map(item -> item.getValue()
115 .get(LogParser.ReportType.SURVIVOR_STATS)
116 .get(PLAB_SIZE_FIELD_NAME)
117 )
118 .collect(Collectors.toList());
119
120 // Check that desired plab size was changed during iterations.
121 // The test case does 3 rounds of allocations. The second round of N allocations and GC's
122 // has a decreasing size of allocations so that iterations N to 2*N -1 will be of decreasing size.
123 // The third round with iterations 2*N to 3*N -1 has increasing sizes of allocation.
124 if ( plabSizes.size() != testCase.iterations * 3 ) {
125 System.out.println(output);
126 throw new RuntimeException ("Expects for " + testCase.iterations * 3 + " PLAB entries in log, found " + plabSizes.size());
127 }
128
129 long startDesiredPLABSize = plabSizes.get(testCase.getIterations());
130 long endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2 - 1);
131
132 if (startDesiredPLABSize < endDesiredPLABSize) {
133 System.out.println(output);
134 throw new RuntimeException("Test failed! Expect that initial PLAB size should be greater than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
135 }
136
137 startDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2);
138 endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 3 - 1);
139
140 if (startDesiredPLABSize > endDesiredPLABSize) {
141 System.out.println(output);
142 throw new RuntimeException("Test failed! Expect that initial PLAB size should be less than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
143 }
144
145 System.out.println("Test passed!");
146 }
147
148 /**
149 * Description of one test case.
150 */
151 private static class TestCase {
152
153 private final int wastePct;
154 private final int chunkSize;
155 private final int parGCThreads;
156 private final int iterations;
157
158 /**
159 * @param wastePct
160 * ParallelGCBufferWastePct
161 * @param chunkSize
162 * requested object size for memory consumption
163 * @param parGCThreads
164 * -XX:ParallelGCThreads
165 * @param iterations
166 *
167 */
168 public TestCase(int wastePct,
169 int chunkSize,
170 int parGCThreads,
171 int iterations
172 ) {
173 if (wastePct == 0 || chunkSize == 0 || parGCThreads == 0 || iterations == 0) {
174 throw new IllegalArgumentException("Parameters should not be 0");
175 }
176 this.wastePct = wastePct;
177
178 this.chunkSize = chunkSize;
179 this.parGCThreads = parGCThreads;
180 this.iterations = iterations;
181 }
182
183 /**
184 * Convert current TestCase to List of options.
185 *
186 * @return
187 * List of options
188 */
189 public List<String> toOptions() {
190 return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
191 "-XX:ParallelGCBufferWastePct=" + wastePct,
192 "-XX:+ResizePLAB",
193 "-Dchunk.size=" + chunkSize,
194 "-Diterations=" + iterations,
195 "-XX:NewSize=16m",
196 "-XX:MaxNewSize=16m"
197 );
198 }
199
200 /**
201 * Print details about test case.
202 */
203 public void print(PrintStream out) {
204 out.println("Test case details:");
205 out.println(" Parallel GC buffer waste pct : " + wastePct);
206 out.println(" Chunk size : " + chunkSize);
207 out.println(" Parallel GC threads : " + parGCThreads);
208 out.println(" Iterations: " + iterations);
209 }
210
211 /**
212 * @return iterations
213 */
214 public int getIterations() {
215 return iterations;
216 }
217 }
218 }