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.management
32 * @build ClassFileInstaller
33 * sun.hotspot.WhiteBox
34 * gc.g1.plab.lib.LogParser
35 * gc.g1.plab.lib.MemoryConsumer
36 * gc.g1.plab.lib.PLABUtils
37 * gc.g1.plab.lib.AppPLABResize
38 * @ignore 8150183
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 if (out.getExitValue() != 0) {
98 System.out.println(out.getOutput());
99 throw new RuntimeException("Exit code is not 0");
100 }
101 checkResults(out.getOutput(), testCase);
102 }
103 }
104
105 /**
106 * Checks testing results.
107 * Expected results - desired PLAB size is decreased and increased during promotion to Survivor.
108 *
109 * @param output - VM output
110 * @param testCase
111 */
112 private static void checkResults(String output, TestCase testCase) {
113 final LogParser log = new LogParser(output);
114 final PlabReport report = log.getEntries();
115
116 final List<Long> plabSizes = report.entryStream()
117 .map(item -> item.getValue()
118 .get(LogParser.ReportType.SURVIVOR_STATS)
119 .get(PLAB_SIZE_FIELD_NAME)
120 )
121 .collect(Collectors.toList());
122
123 // Check that desired plab size was changed during iterations.
124 // The test case does 3 rounds of allocations. The second round of N allocations and GC's
125 // has a decreasing size of allocations so that iterations N to 2*N -1 will be of decreasing size.
126 // The third round with iterations 2*N to 3*N -1 has increasing sizes of allocation.
127 long startDesiredPLABSize = plabSizes.get(testCase.getIterations());
128 long endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2 - 1);
129
130 if (startDesiredPLABSize < endDesiredPLABSize) {
131 System.out.println(output);
132 throw new RuntimeException("Test failed! Expect that initial PLAB size should be greater than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
133 }
134
135 startDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2);
136 endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 3 - 1);
137
138 if (startDesiredPLABSize > endDesiredPLABSize) {
139 System.out.println(output);
140 throw new RuntimeException("Test failed! Expect that initial PLAB size should be less than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
141 }
142
143 System.out.println("Test passed!");
144 }
145
146 /**
147 * Description of one test case.
148 */
149 private static class TestCase {
150
151 private final int wastePct;
152 private final int chunkSize;
153 private final int parGCThreads;
154 private final int iterations;
155
156 /**
157 * @param wastePct
158 * ParallelGCBufferWastePct
159 * @param chunkSize
160 * requested object size for memory consumption
161 * @param parGCThreads
162 * -XX:ParallelGCThreads
163 * @param iterations
164 *
165 */
166 public TestCase(int wastePct,
167 int chunkSize,
168 int parGCThreads,
169 int iterations
170 ) {
171 if (wastePct == 0 || chunkSize == 0 || parGCThreads == 0 || iterations == 0) {
172 throw new IllegalArgumentException("Parameters should not be 0");
173 }
174 this.wastePct = wastePct;
175
176 this.chunkSize = chunkSize;
177 this.parGCThreads = parGCThreads;
178 this.iterations = iterations;
179 }
180
181 /**
182 * Convert current TestCase to List of options.
183 *
184 * @return
185 * List of options
186 */
187 public List<String> toOptions() {
188 return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
189 "-XX:ParallelGCBufferWastePct=" + wastePct,
190 "-XX:+ResizePLAB",
191 "-Dchunk.size=" + chunkSize,
192 "-Diterations=" + iterations,
193 "-XX:NewSize=16m",
194 "-XX:MaxNewSize=16m"
195 );
196 }
197
198 /**
199 * Print details about test case.
200 */
201 public void print(PrintStream out) {
202 out.println("Test case details:");
203 out.println(" Parallel GC buffer waste pct : " + wastePct);
204 out.println(" Chunk size : " + chunkSize);
205 out.println(" Parallel GC threads : " + parGCThreads);
206 out.println(" Iterations: " + iterations);
207 }
208
209 /**
210 * @return iterations
211 */
212 public int getIterations() {
213 return iterations;
214 }
215 }
216 }