213 lines
8.1 KiB
Java
213 lines
8.1 KiB
Java
/*
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* Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test TestPLABResize
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* @bug 8141278 8141141
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* @summary Test for PLAB resizing
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* @requires vm.gc.G1
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* @requires vm.flagless
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* @modules java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main gc.g1.plab.TestPLABResize
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*/
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package gc.g1.plab;
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import java.util.Arrays;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.io.PrintStream;
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import gc.g1.plab.lib.LogParser;
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import gc.g1.plab.lib.PLABUtils;
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import gc.g1.plab.lib.AppPLABResize;
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import gc.g1.plab.lib.PlabReport;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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/**
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* Test for PLAB resizing.
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*/
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public class TestPLABResize {
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private static final int OBJECT_SIZE_SMALL = 10;
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private static final int OBJECT_SIZE_MEDIUM = 70;
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private static final int OBJECT_SIZE_HIGH = 150;
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private static final int GC_NUM_SMALL = 1;
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private static final int GC_NUM_MEDIUM = 3;
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private static final int GC_NUM_HIGH = 7;
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private static final int WASTE_PCT_SMALL = 10;
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private static final int WASTE_PCT_MEDIUM = 20;
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private static final int WASTE_PCT_HIGH = 30;
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private static final int ITERATIONS_SMALL = 3;
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private static final int ITERATIONS_MEDIUM = 5;
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private static final int ITERATIONS_HIGH = 8;
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private static final String PLAB_SIZE_FIELD_NAME = "actual";
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private final static TestCase[] TEST_CASES = {
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new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_SMALL, GC_NUM_SMALL, ITERATIONS_MEDIUM),
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new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_HIGH, ITERATIONS_SMALL),
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new TestCase(WASTE_PCT_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
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new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
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new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
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new TestCase(WASTE_PCT_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH),
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new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, ITERATIONS_MEDIUM),
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new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, ITERATIONS_SMALL),
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new TestCase(WASTE_PCT_HIGH, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, ITERATIONS_HIGH)
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};
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public static void main(String[] args) throws Throwable {
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for (TestCase testCase : TEST_CASES) {
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testCase.print(System.out);
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List<String> options = PLABUtils.prepareOptions(testCase.toOptions());
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options.add(AppPLABResize.class.getName());
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OutputAnalyzer out = ProcessTools.executeTestJava(options);
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PLABUtils.commonCheck(out);
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checkResults(out.getOutput(), testCase);
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}
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}
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/**
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* Checks testing results.
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* Expected results - desired PLAB size is decreased and increased during promotion to Survivor.
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*
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* @param output - VM output
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* @param testCase
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*/
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private static void checkResults(String output, TestCase testCase) {
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final LogParser log = new LogParser(output);
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final PlabReport report = log.getEntries();
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final List<Long> plabSizes = report.entryStream()
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.map(item -> item.getValue()
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.get(LogParser.ReportType.SURVIVOR_STATS)
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.get(PLAB_SIZE_FIELD_NAME)
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)
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.collect(Collectors.toList());
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// Check that desired plab size was changed during iterations.
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// The test case does 3 rounds of allocations. The second round of N allocations and GC's
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// has a decreasing size of allocations so that iterations N to 2*N -1 will be of decreasing size.
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// The third round with iterations 2*N to 3*N -1 has increasing sizes of allocation.
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if ( plabSizes.size() != testCase.iterations * 3 ) {
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System.out.println(output);
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throw new RuntimeException ("Expects for " + testCase.iterations * 3 + " PLAB entries in log, found " + plabSizes.size());
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}
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long startDesiredPLABSize = plabSizes.get(testCase.getIterations());
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long endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2 - 1);
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if (startDesiredPLABSize < endDesiredPLABSize) {
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System.out.println(output);
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throw new RuntimeException("Test failed! Expect that initial PLAB size should be greater than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
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}
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startDesiredPLABSize = plabSizes.get(testCase.getIterations() * 2);
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endDesiredPLABSize = plabSizes.get(testCase.getIterations() * 3 - 1);
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if (startDesiredPLABSize > endDesiredPLABSize) {
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System.out.println(output);
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throw new RuntimeException("Test failed! Expect that initial PLAB size should be less than checked. Initial size: " + startDesiredPLABSize + " Checked size:" + endDesiredPLABSize);
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}
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System.out.println("Test passed!");
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}
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/**
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* Description of one test case.
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*/
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private static class TestCase {
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private final int wastePct;
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private final int chunkSize;
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private final int parGCThreads;
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private final int iterations;
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/**
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* @param wastePct
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* ParallelGCBufferWastePct
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* @param chunkSize
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* requested object size for memory consumption
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* @param parGCThreads
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* -XX:ParallelGCThreads
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* @param iterations
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*
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*/
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public TestCase(int wastePct,
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int chunkSize,
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int parGCThreads,
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int iterations
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) {
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if (wastePct == 0 || chunkSize == 0 || parGCThreads == 0 || iterations == 0) {
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throw new IllegalArgumentException("Parameters should not be 0");
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}
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this.wastePct = wastePct;
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this.chunkSize = chunkSize;
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this.parGCThreads = parGCThreads;
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this.iterations = iterations;
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}
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/**
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* Convert current TestCase to List of options.
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*
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* @return
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* List of options
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*/
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public List<String> toOptions() {
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return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads,
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"-XX:ParallelGCBufferWastePct=" + wastePct,
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"-XX:+ResizePLAB",
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"-Dchunk.size=" + chunkSize,
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"-Diterations=" + iterations,
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"-XX:NewSize=16m",
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"-XX:MaxNewSize=16m"
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);
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}
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/**
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* Print details about test case.
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*/
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public void print(PrintStream out) {
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out.println("Test case details:");
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out.println(" Parallel GC buffer waste pct : " + wastePct);
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out.println(" Chunk size : " + chunkSize);
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out.println(" Parallel GC threads : " + parGCThreads);
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out.println(" Iterations: " + iterations);
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}
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/**
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* @return iterations
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*/
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public int getIterations() {
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return iterations;
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}
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}
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}
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