128 lines
4.5 KiB
Java
128 lines
4.5 KiB
Java
/*
|
|
* Copyright (c) 2014, 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.class_unloading;
|
|
|
|
/*
|
|
* @test
|
|
* @bug 8049831
|
|
* @requires vm.gc.G1
|
|
* @library /test/lib
|
|
* @modules java.base/jdk.internal.misc
|
|
* java.management
|
|
* @build jdk.test.whitebox.WhiteBox
|
|
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
|
|
* @run driver gc.class_unloading.TestG1ClassUnloadingHWM
|
|
* @summary Test that -XX:-ClassUnloadingWithConcurrentMark will trigger a Full GC when more than MetaspaceSize metadata is allocated.
|
|
*/
|
|
|
|
import jdk.test.lib.process.OutputAnalyzer;
|
|
import jdk.test.lib.process.ProcessTools;
|
|
import jdk.test.whitebox.WhiteBox;
|
|
|
|
public class TestG1ClassUnloadingHWM {
|
|
private static long MetaspaceSize = 32 * 1024 * 1024;
|
|
private static long YoungGenSize = 32 * 1024 * 1024;
|
|
|
|
private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
|
|
return ProcessTools.executeLimitedTestJava(
|
|
"-Xbootclasspath/a:.",
|
|
"-XX:+UnlockDiagnosticVMOptions",
|
|
"-XX:+WhiteBoxAPI",
|
|
"-XX:MetaspaceSize=" + MetaspaceSize,
|
|
"-Xmn" + YoungGenSize,
|
|
"-XX:+UseG1GC",
|
|
"-XX:" + (enableUnloading ? "+" : "-") + "ClassUnloadingWithConcurrentMark",
|
|
"-Xlog:gc",
|
|
TestG1ClassUnloadingHWM.AllocateBeyondMetaspaceSize.class.getName(),
|
|
"" + MetaspaceSize,
|
|
"" + YoungGenSize);
|
|
}
|
|
|
|
public static OutputAnalyzer runWithG1ClassUnloading() throws Exception {
|
|
return run(true);
|
|
}
|
|
|
|
public static OutputAnalyzer runWithoutG1ClassUnloading() throws Exception {
|
|
return run(false);
|
|
}
|
|
|
|
public static void testWithoutG1ClassUnloading() throws Exception {
|
|
// -XX:-ClassUnloadingWithConcurrentMark is used, so we expect a full GC instead of a concurrent cycle.
|
|
OutputAnalyzer out = runWithoutG1ClassUnloading();
|
|
|
|
out.shouldMatch(".*Pause Full.*");
|
|
out.shouldNotMatch(".*Pause Young \\(Concurrent Start\\).*");
|
|
}
|
|
|
|
public static void testWithG1ClassUnloading() throws Exception {
|
|
// -XX:+ClassUnloadingWithConcurrentMark is used, so we expect a concurrent cycle instead of a full GC.
|
|
OutputAnalyzer out = runWithG1ClassUnloading();
|
|
|
|
out.shouldMatch(".*Pause Young \\(Concurrent Start\\).*");
|
|
out.shouldNotMatch(".*Pause Full.*");
|
|
}
|
|
|
|
public static void main(String args[]) throws Exception {
|
|
testWithG1ClassUnloading();
|
|
testWithoutG1ClassUnloading();
|
|
}
|
|
|
|
public static class AllocateBeyondMetaspaceSize {
|
|
public static Object dummy;
|
|
|
|
public static void main(String [] args) throws Exception {
|
|
if (args.length != 2) {
|
|
throw new IllegalArgumentException("Usage: <MetaspaceSize> <YoungGenSize>");
|
|
}
|
|
|
|
WhiteBox wb = WhiteBox.getWhiteBox();
|
|
|
|
// Allocate past the MetaspaceSize limit
|
|
long metaspaceSize = Long.parseLong(args[0]);
|
|
long allocationBeyondMetaspaceSize = metaspaceSize * 2;
|
|
|
|
// There is a cap on how large a single metaspace allocation can get. So we may have to allocate in blocks.
|
|
final long max = wb.maxMetaspaceAllocationSize();
|
|
while (allocationBeyondMetaspaceSize > 0) {
|
|
long s = max < allocationBeyondMetaspaceSize ? max : allocationBeyondMetaspaceSize;
|
|
wb.allocateMetaspace(null, s);
|
|
allocationBeyondMetaspaceSize -= s;
|
|
}
|
|
|
|
long youngGenSize = Long.parseLong(args[1]);
|
|
triggerYoungGCs(youngGenSize);
|
|
|
|
}
|
|
|
|
public static void triggerYoungGCs(long youngGenSize) {
|
|
long approxAllocSize = 32 * 1024;
|
|
long numAllocations = 2 * youngGenSize / approxAllocSize;
|
|
|
|
for (long i = 0; i < numAllocations; i++) {
|
|
dummy = new byte[(int)approxAllocSize];
|
|
}
|
|
}
|
|
}
|
|
}
|