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 /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 }