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/*
* Copyright (c) 2011, 2020, 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 nsk.monitoring.ThreadMXBean;
import java.util.*;
import nsk.share.test.*;
import nsk.monitoring.share.*;
import nsk.share.gc.Memory;
public abstract class ThreadMXBeanTestBase extends MonitoringTestBase
implements Initializable {
/**
* Maximum allocation object size. about 2 Mb
*/
private static final int MAX_OBJECT_SIZE = 2*1024*1024;
/**
* Allocations count for each MXBeanTestThread
*/
private static final int ALLOCATIONS = 100;
/**
* Minimum size of allocated objects for a single thread stressing GC: 1Mb
*/
protected static final int MIN_STRESS_ALLOCATION_AMOUNT = 1024*1024;
/**
* Percent of maximum difference of actual result from expected one
*/
protected static final int DELTA_PERCENT = 15;
/**
* Instance of com.sun.management.ThreadMXBean used by all tests
* Obtained in initialize() method
*/
protected com.sun.management.ThreadMXBean threadMXBean;
/**
* Stresser class instance used in StressTest
*/
protected Stresser stresser;
/**
* String indicating the GarbageProducer type used in test
*/
protected String garbageProducerId;
/**
* Defined array with allocation objects sizes
*/
protected static int[] allocArr = new int[ALLOCATIONS];
/**
* Obtains instance of com.sun.management.ThreadMXBean
* and stores it in threadMXBean field
* If com.sun.management.ThreadMXBean API is not available,
* threadMXBean is set to null and appropriate message is
* prompted
*/
public void initialize() {
if (monitoringFactory.hasThreadMXBeanNew()) {
threadMXBean =
(com.sun.management.ThreadMXBean) monitoringFactory.getThreadMXBeanNew();
// ensure LocalRandom is loaded and has enough memory
LocalRandom.init();
for (int i = 0; i < ALLOCATIONS; i++) {
allocArr[i] = Memory.getArrayExtraSize() + Memory.getIntSize()
+ Memory.getReferenceSize() // don't be zero-length
+ LocalRandom.nextInt(MAX_OBJECT_SIZE);
}
} else {
log.info("com.sun.management.ThreadMXBean API is not available!");
}
}
/**
* Obtains instance of Stresser and stores it in stresser field
* @param args Stresser arguments
*/
public void setStresser(String[] args) {
if (stresser == null)
stresser = new Stresser(args);
}
/**
* Parses input String arrays searching for GarbageProducer
* settings. If found, sets garbageProducerID filed.
* @param args input arguments
* @return input arguments without GarbageProducer options
*/
public String[] setGarbageProducer(String[] args) {
if (garbageProducerId == null) {
ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-gp")) {
garbageProducerId = args[++i];
} else {
list.add(args[i]);
}
}
return list.toArray(new String[] {});
} else {
return args;
}
}
/**
* Starts all specified TestThread threads
* @param threads threads to start
*/
public BarrierHandler startThreads(MXBeanTestThread... threads) {
BarrierHandler handler = new BarrierHandler(threads);
for (MXBeanTestThread thread : threads) {
thread.setHandler(handler);
thread.start();
}
handler.start();
return handler;
}
/**
* Returns expected memory size allocated by MXBeanTestThreads during
* stress test (allocateStress() method execution)
*
* @param array of MXBeanTestThreads
* @return expected amount of memory allocated by each StressTestThread
*/
public long[] getStressAllocatedBytes(MXBeanTestThread... threads) {
long[] result = new long[threads.length];
int counter = 0;
for (MXBeanTestThread thread : threads) {
result[counter++] = thread.getStressAllocatedBytes();
}
return result;
}
}
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