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