147 lines
6.0 KiB
Java
147 lines
6.0 KiB
Java
/*
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* Copyright (c) 2021, 2023, 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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package gc.g1;
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/*
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* @test id=0percent
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* @summary Test G1MixedGCLiveThresholdPercent=0. Fill up a region to at least 33 percent,
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* the region should not be selected for mixed GC cycle.
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* @requires vm.gc.G1
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* @library /test/lib
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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 driver gc.g1.TestMixedGCLiveThreshold 0 false
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*/
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/*
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* @test id=25percent
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* @summary Test G1MixedGCLiveThresholdPercent=25. Fill up a region to at least 33 percent,
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* the region should not be selected for mixed GC cycle.
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* @requires vm.gc.G1
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* @library /test/lib
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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 driver gc.g1.TestMixedGCLiveThreshold 25 false
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*/
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/*
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* @test id=100percent
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* @summary Test G1MixedGCLiveThresholdPercent=100. Fill up a region to at least 33 percent,
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* the region should be selected for mixed GC cycle.
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* @requires vm.gc.G1
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* @library /test/lib
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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 driver gc.g1.TestMixedGCLiveThreshold 100 true
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*/
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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public class TestMixedGCLiveThreshold {
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private static final String pattern = "Remembered Set Tracking update regions total ([0-9]+), selected ([0-9]+)$";
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public static void main(String[] args) throws Exception {
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int liveThresholdPercent = Integer.parseInt(args[0]);
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boolean expectRebuild = Boolean.parseBoolean(args[1]);
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testMixedGCLiveThresholdPercent(liveThresholdPercent, expectRebuild);
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}
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private static void testMixedGCLiveThresholdPercent(int liveThresholdPercent, boolean expectedRebuild) throws Exception {
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OutputAnalyzer output = testWithMixedGCLiveThresholdPercent(liveThresholdPercent);
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boolean regionsSelected = regionsSelectedForRebuild(output.getStdout());
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Asserts.assertEquals(regionsSelected, expectedRebuild,
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(expectedRebuild ?
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"No Regions selected for rebuild. G1MixedGCLiveThresholdPercent=" + liveThresholdPercent +
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" at least one region should be selected" :
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"Regions selected for rebuild. G1MixedGCLiveThresholdPercent=" + liveThresholdPercent +
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" no regions should be selected")
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);
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output.shouldHaveExitValue(0);
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output.reportDiagnosticSummary();
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}
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private static OutputAnalyzer testWithMixedGCLiveThresholdPercent(int percent) throws Exception {
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ArrayList<String> basicOpts = new ArrayList<>();
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Collections.addAll(basicOpts, new String[] {
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"-Xbootclasspath/a:.",
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"-XX:+UseG1GC",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+UnlockExperimentalVMOptions",
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"-XX:+WhiteBoxAPI",
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// Parallel full gc can distribute live objects into different regions.
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"-XX:ParallelGCThreads=1",
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"-Xlog:gc+remset+tracking=trace",
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"-Xms10M",
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"-Xmx10M"});
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basicOpts.add("-XX:G1MixedGCLiveThresholdPercent=" + percent);
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basicOpts.add(GCTest.class.getName());
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return ProcessTools.executeLimitedTestJava(basicOpts);
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}
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private static boolean regionsSelectedForRebuild(String output) throws Exception {
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Matcher m = Pattern.compile(pattern, Pattern.MULTILINE).matcher(output);
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if (!m.find()) {
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throw new Exception("Could not find correct output for Remembered Set Tracking in stdout," +
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" should match the pattern \"" + pattern + "\", but stdout is \n" + output);
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}
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return Integer.parseInt(m.group(2)) > 0;
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}
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public static class GCTest {
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public static void main(String args[]) throws Exception {
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WhiteBox wb = WhiteBox.getWhiteBox();
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// Allocate some memory less than region size.
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Object used = allocate();
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// Trigger the full GC using the WhiteBox API.
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wb.fullGC(); // full
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// Memory objects have been promoted to old by full GC.
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// Concurrent cycle may select regions for rebuilding
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wb.g1RunConcurrentGC();
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System.out.println(used);
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}
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private static Object allocate() {
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final int objectSize = WhiteBox.getWhiteBox().g1RegionSize() / 3;
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Object ret = new byte[objectSize];
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return ret;
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}
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}
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}
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