/* * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test TestPLABResize * @bug 8141278 8141141 * @summary Test for PLAB resizing * @requires vm.gc.G1 * @requires !vm.flightRecorder * @library /test/lib / * @modules java.base/jdk.internal.misc * @modules java.management * @build sun.hotspot.WhiteBox * @run main ClassFileInstaller sun.hotspot.WhiteBox * sun.hotspot.WhiteBox$WhiteBoxPermission * @run main gc.g1.plab.TestPLABResize */ package gc.g1.plab; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import java.io.PrintStream; import gc.g1.plab.lib.LogParser; import gc.g1.plab.lib.PLABUtils; import gc.g1.plab.lib.AppPLABResize; import gc.g1.plab.lib.PlabReport; import jdk.test.lib.process.OutputAnalyzer; import jdk.test.lib.process.ProcessTools; /** * Test for PLAB resizing. */ public class TestPLABResize { private static final int OBJECT_SIZE_SMALL = 10; private static final int OBJECT_SIZE_MEDIUM = 70; private static final int OBJECT_SIZE_HIGH = 150; private static final int GC_NUM_SMALL = 1; private static final int GC_NUM_MEDIUM = 3; private static final int GC_NUM_HIGH = 7; private static final int WASTE_PCT_SMALL = 10; private static final int WASTE_PCT_MEDIUM = 20; private static final int WASTE_PCT_HIGH = 30; private static final int ITERATIONS_SMALL = 3; private static final int ITERATIONS_MEDIUM = 5; private static final int ITERATIONS_HIGH = 8; private static final String PLAB_SIZE_FIELD_NAME = "actual"; private final static TestCase[] TEST_CASES = { new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_SMALL, GC_NUM_SMALL, ITERATIONS_MEDIUM), new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_HIGH, ITERATIONS_SMALL), new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH), new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM), new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL), new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH), new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM), new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL), new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH) }; public static void main(String[] args) throws Throwable { for (TestCase testCase : TEST_CASES) { testCase.print(System.out); List options = PLABUtils.prepareOptions(testCase.toOptions()); options.add(AppPLABResize.class.getName()); OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()])); PLABUtils.commonCheck(out); checkResults(out.getOutput(), testCase); } } /** * Checks testing results. * Expected results - desired PLAB size is decreased and increased during promotion to Survivor. * * @param output - VM output * @param testCase */ private static void checkResults(String output, TestCase testCase) { final LogParser log = new LogParser(output); final PlabReport report = log.getEntries(); final List plabSizes = report.entryStream() .map(item -> item.getValue() .get(LogParser.ReportType.SURVIVOR_STATS) .get(PLAB_SIZE_FIELD_NAME) ) .collect(Collectors.toList()); // Check that desired plab size was changed during iterations. // The test case does 3 rounds of allocations. The second round of N allocations and GC's // has a decreasing size of allocations so that iterations N to 2*N -1 will be of decreasing size. // The third round with iterations 2*N to 3*N -1 has increasing sizes of allocation. if ( plabSizes.size() != testCase.iterations * 3 ) { System.out.println(output); throw new RuntimeException ("Expects for " + testCase.iterations * 3 + " PLAB entries in log, found " + plabSizes.size()); } long startDesiredPLABSize = plabSizes.get(testCase.getIterations()); long endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2 - 1); if (startDesiredPLABSize < endDesiredPLABSize) { System.out.println(output); throw new RuntimeException("Test failed! Expect that initial PLAB size should be greater than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize); } startDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2); endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 3 - 1); if (startDesiredPLABSize > endDesiredPLABSize) { System.out.println(output); throw new RuntimeException("Test failed! Expect that initial PLAB size should be less than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize); } System.out.println("Test passed!"); } /** * Description of one test case. */ private static class TestCase { private final int wastePct; private final int chunkSize; private final int parGCThreads; private final int iterations; /** * @param wastePct * ParallelGCBufferWastePct * @param chunkSize * requested object size for memory consumption * @param parGCThreads * -XX:ParallelGCThreads * @param iterations * */ public TestCase(int wastePct, int chunkSize, int parGCThreads, int iterations ) { if (wastePct == 0 || chunkSize == 0 || parGCThreads == 0 || iterations == 0) { throw new IllegalArgumentException("Parameters should not be 0"); } this.wastePct = wastePct; this.chunkSize = chunkSize; this.parGCThreads = parGCThreads; this.iterations = iterations; } /** * Convert current TestCase to List of options. * * @return * List of options */ public List toOptions() { return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads, "-XX:ParallelGCBufferWastePct=" + wastePct, "-XX:+ResizePLAB", "-Dchunk.size=" + chunkSize, "-Diterations=" + iterations, "-XX:NewSize=16m", "-XX:MaxNewSize=16m" ); } /** * Print details about test case. */ public void print(PrintStream out) { out.println("Test case details:"); out.println(" Parallel GC buffer waste pct : " + wastePct); out.println(" Chunk size : " + chunkSize); out.println(" Parallel GC threads : " + parGCThreads); out.println(" Iterations: " + iterations); } /** * @return iterations */ public int getIterations() { return iterations; } } }