russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
112 lines
3.8 KiB
Java
112 lines
3.8 KiB
Java
/*
|
|
* Copyright (c) 2025, 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 id=Epsilon
|
|
* @requires vm.gc.Epsilon
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
/*
|
|
* @test id=Serial
|
|
* @requires vm.gc.Serial
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UseSerialGC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
/*
|
|
* @test id=Parallel
|
|
* @requires vm.gc.Parallel
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UseParallelGC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
/*
|
|
* @test id=G1
|
|
* @requires vm.gc.G1
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UseG1GC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
/*
|
|
* @test id=ZGC
|
|
* @requires vm.gc.Z
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UseZGC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
/*
|
|
* @test id=Shenandoah
|
|
* @requires vm.gc.Shenandoah
|
|
* @bug 8368527
|
|
* @summary Stress MemoryMXBean.getTotalGcCpuTime during shutdown
|
|
* @library /test/lib
|
|
* @run main/othervm -XX:+UseShenandoahGC StressGetTotalGcCpuTimeDuringShutdown
|
|
*/
|
|
|
|
import java.lang.management.ManagementFactory;
|
|
import java.lang.management.MemoryMXBean;
|
|
import java.lang.management.ThreadMXBean;
|
|
|
|
public class StressGetTotalGcCpuTimeDuringShutdown {
|
|
static final ThreadMXBean mxThreadBean = ManagementFactory.getThreadMXBean();
|
|
static final MemoryMXBean mxMemoryBean = ManagementFactory.getMemoryMXBean();
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
try {
|
|
if (!mxThreadBean.isThreadCpuTimeEnabled()) {
|
|
return;
|
|
}
|
|
} catch (UnsupportedOperationException e) {
|
|
if (mxMemoryBean.getTotalGcCpuTime() != -1) {
|
|
throw new RuntimeException("GC CPU time should be -1");
|
|
}
|
|
return;
|
|
}
|
|
|
|
final int numberOfThreads = Runtime.getRuntime().availableProcessors() * 8;
|
|
for (int i = 0; i < numberOfThreads; i++) {
|
|
Thread t = new Thread(() -> {
|
|
while (true) {
|
|
long gcCpuTimeFromThread = mxMemoryBean.getTotalGcCpuTime();
|
|
if (gcCpuTimeFromThread < -1) {
|
|
throw new RuntimeException("GC CPU time should never be less than -1 but was " + gcCpuTimeFromThread);
|
|
}
|
|
}
|
|
});
|
|
t.setDaemon(true);
|
|
t.start();
|
|
}
|
|
}
|
|
}
|