| /* |
| * 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<String> 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<Long> 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<String> 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; |
| } |
| } |
| } |