78 lines
3.6 KiB
Java
78 lines
3.6 KiB
Java
/*
|
|
* Copyright (c) 2021, 2023, 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.
|
|
*/
|
|
|
|
package gc.g1;
|
|
|
|
/*
|
|
* @test TestSkipRebuildRemsetPhase
|
|
* @summary Skip Rebuild Remset Phase if the Remark pause does not identify any rebuild candidates.
|
|
* Fill up a region to above the set G1MixedGCLiveThresholdPercent.
|
|
* @requires vm.gc.G1
|
|
* @library /test/lib
|
|
* @build jdk.test.whitebox.WhiteBox
|
|
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
|
|
* @run driver gc.g1.TestSkipRebuildRemsetPhase
|
|
*/
|
|
|
|
import jdk.test.lib.process.OutputAnalyzer;
|
|
import jdk.test.lib.process.ProcessTools;
|
|
import jdk.test.whitebox.WhiteBox;
|
|
|
|
public class TestSkipRebuildRemsetPhase {
|
|
public static void main(String[] args) throws Exception {
|
|
OutputAnalyzer output = ProcessTools.executeLimitedTestJava("-Xbootclasspath/a:.",
|
|
"-XX:+UseG1GC",
|
|
"-XX:+UnlockExperimentalVMOptions",
|
|
"-XX:+UnlockDiagnosticVMOptions",
|
|
"-XX:+WhiteBoxAPI",
|
|
"-XX:G1MixedGCLiveThresholdPercent=0",
|
|
"-Xlog:gc+marking=debug,gc+phases=debug,gc+remset+tracking=trace",
|
|
"-Xms10M",
|
|
"-Xmx10M",
|
|
GCTest.class.getName());
|
|
output.shouldContain("Skipping Remembered Set Rebuild.");
|
|
output.shouldContain("No Remembered Sets to update after rebuild");
|
|
output.shouldHaveExitValue(0);
|
|
}
|
|
|
|
public static class GCTest {
|
|
public static void main(String args[]) throws Exception {
|
|
WhiteBox wb = WhiteBox.getWhiteBox();
|
|
// Allocate some memory less than region size. Any object is just fine as we set
|
|
// G1MixedGCLiveThresholdPercent to zero (and no region should be selected).
|
|
Object used = new byte[2000];
|
|
|
|
// Trigger the full GC using the WhiteBox API to make sure that at least "used"
|
|
// has been promoted to old gen.
|
|
wb.fullGC();
|
|
|
|
// Memory objects have been promoted to old by full GC.
|
|
// Concurrent cycle should not select any regions for rebuilding and print the
|
|
// appropriate message.
|
|
wb.g1RunConcurrentGC();
|
|
System.out.println(used);
|
|
}
|
|
}
|
|
}
|
|
|