TestPLABResize.java revision 11833:1cbffa2beba6
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 */ 38package gc.g1.plab; 39 40import java.util.Arrays; 41import java.util.List; 42import java.util.stream.Collectors; 43import java.io.PrintStream; 44 45import gc.g1.plab.lib.LogParser; 46import gc.g1.plab.lib.PLABUtils; 47import gc.g1.plab.lib.AppPLABResize; 48import gc.g1.plab.lib.PlabReport; 49 50import jdk.test.lib.process.OutputAnalyzer; 51import jdk.test.lib.process.ProcessTools; 52 53/** 54 * Test for PLAB resizing. 55 */ 56public 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} 214