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/*
* Copyright (c) 2016, 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.stress;
/*
* @test
* @bug 8148397
* @key stress
* @summary Stress test for IHOP
* @requires vm.gc.G1
* @run main/othervm/timeout=200 -Xmx128m -XX:G1HeapWastePercent=0 -XX:G1MixedGCCountTarget=1
* -XX:+UseG1GC -XX:G1HeapRegionSize=1m -XX:+G1UseAdaptiveIHOP
* -Xlog:gc+ihop=debug,gc+ihop+ergo=debug,gc+ergo=debug:TestStressIHOPMultiThread1.log
* -Dtimeout=2 -DheapUsageMinBound=30 -DheapUsageMaxBound=80
* -Dthreads=2 gc.stress.TestStressIHOPMultiThread
*/
/*
* @test
* @requires vm.gc.G1
* @run main/othervm/timeout=200 -Xmx256m -XX:G1HeapWastePercent=0 -XX:G1MixedGCCountTarget=1
* -XX:+UseG1GC -XX:G1HeapRegionSize=2m -XX:+G1UseAdaptiveIHOP
* -Xlog:gc+ihop=debug,gc+ihop+ergo=debug,gc+ergo=debug:TestStressIHOPMultiThread2.log
* -Dtimeout=2 -DheapUsageMinBound=60 -DheapUsageMaxBound=90
* -Dthreads=3 gc.stress.TestStressIHOPMultiThread
*/
/*
* @test
* @requires vm.gc.G1
* @run main/othervm/timeout=200 -Xmx256m -XX:G1HeapWastePercent=0 -XX:G1MixedGCCountTarget=1
* -XX:+UseG1GC -XX:G1HeapRegionSize=4m -XX:-G1UseAdaptiveIHOP
* -Xlog:gc+ihop=debug,gc+ihop+ergo=debug,gc+ergo=debug:TestStressIHOPMultiThread3.log
* -Dtimeout=2 -DheapUsageMinBound=40 -DheapUsageMaxBound=90
* -Dthreads=5 gc.stress.TestStressIHOPMultiThread
*/
/*
* @test
* @requires vm.gc.G1
* @run main/othervm/timeout=200 -Xmx128m -XX:G1HeapWastePercent=0 -XX:G1MixedGCCountTarget=1
* -XX:+UseG1GC -XX:G1HeapRegionSize=8m -XX:+G1UseAdaptiveIHOP
* -Xlog:gc+ihop=debug,gc+ihop+ergo=debug,gc+ergo=debug:TestStressIHOPMultiThread4.log
* -Dtimeout=2 -DheapUsageMinBound=20 -DheapUsageMaxBound=90
* -Dthreads=10 gc.stress.TestStressIHOPMultiThread
*/
/*
* @test
* @requires vm.gc.G1
* @run main/othervm/timeout=200 -Xmx512m -XX:G1HeapWastePercent=0 -XX:G1MixedGCCountTarget=1
* -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:+G1UseAdaptiveIHOP
* -Xlog:gc+ihop=debug,gc+ihop+ergo=debug,gc+ergo=debug:TestStressIHOPMultiThread5.log
* -Dtimeout=2 -DheapUsageMinBound=20 -DheapUsageMaxBound=90
* -Dthreads=17 gc.stress.TestStressIHOPMultiThread
*/
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
/**
* Stress test for Adaptive IHOP. Starts a number of threads that fill and free
* specified amount of memory. Tests work with enabled IHOP logging.
*
*/
public class TestStressIHOPMultiThread {
public final static List<Object> GARBAGE = new LinkedList<>();
private final long HEAP_SIZE;
// Amount of memory to be allocated before iterations start
private final long HEAP_PREALLOC_SIZE;
// Amount of memory to be allocated and freed during iterations
private final long HEAP_ALLOC_SIZE;
private final int CHUNK_SIZE = 100000;
private final int TIMEOUT;
private final int THREADS;
private final int HEAP_LOW_BOUND;
private final int HEAP_HIGH_BOUND;
private volatile boolean running = true;
private final List<AllocationThread> threads;
public static void main(String[] args) throws InterruptedException {
new TestStressIHOPMultiThread().start();
}
TestStressIHOPMultiThread() {
TIMEOUT = Integer.getInteger("timeout") * 60;
THREADS = Integer.getInteger("threads");
HEAP_LOW_BOUND = Integer.getInteger("heapUsageMinBound");
HEAP_HIGH_BOUND = Integer.getInteger("heapUsageMaxBound");
HEAP_SIZE = Runtime.getRuntime().maxMemory();
HEAP_PREALLOC_SIZE = HEAP_SIZE * HEAP_LOW_BOUND / 100;
HEAP_ALLOC_SIZE = HEAP_SIZE * (HEAP_HIGH_BOUND - HEAP_LOW_BOUND) / 100;
threads = new ArrayList<>(THREADS);
}
public void start() throws InterruptedException {
fill();
createThreads();
waitForStress();
stressDone();
waitForFinish();
}
/**
* Fills HEAP_PREALLOC_SIZE bytes of garbage.
*/
private void fill() {
long allocated = 0;
while (allocated < HEAP_PREALLOC_SIZE) {
GARBAGE.add(new byte[CHUNK_SIZE]);
allocated += CHUNK_SIZE;
}
}
/**
* Creates a number of threads which will fill and free amount of memory.
*/
private void createThreads() {
for (int i = 0; i < THREADS; ++i) {
System.out.println("Create thread " + i);
AllocationThread thread =new TestStressIHOPMultiThread.AllocationThread(i, HEAP_ALLOC_SIZE / THREADS);
// Put reference to thread garbage into common garbage for avoiding possible optimization.
GARBAGE.add(thread.getList());
threads.add(thread);
}
threads.forEach(t -> t.start());
}
/**
* Wait each thread for finishing
*/
private void waitForFinish() {
threads.forEach(thread -> {
thread.silentJoin();
});
}
private boolean isRunning() {
return running;
}
private void stressDone() {
running = false;
}
private void waitForStress() throws InterruptedException {
Thread.sleep(TIMEOUT * 1000);
}
private class AllocationThread extends Thread {
private final List<Object> garbage;
private final long amountOfGarbage;
private final int threadId;
public AllocationThread(int id, long amount) {
super("Thread " + id);
threadId = id;
amountOfGarbage = amount;
garbage = new LinkedList<>();
}
/**
* Returns list of garbage.
* @return List with thread garbage.
*/
public List<Object> getList(){
return garbage;
}
@Override
public void run() {
System.out.println("Start the thread " + threadId);
while (TestStressIHOPMultiThread.this.isRunning()) {
allocate(amountOfGarbage);
free();
}
}
private void silentJoin() {
System.out.println("Join the thread " + threadId);
try {
join();
} catch (InterruptedException ie) {
throw new RuntimeException(ie);
}
}
/**
* Allocates thread local garbage
*/
private void allocate(long amount) {
long allocated = 0;
while (allocated < amount && TestStressIHOPMultiThread.this.isRunning()) {
garbage.add(new byte[CHUNK_SIZE]);
allocated += CHUNK_SIZE;
}
}
/**
* Frees thread local garbage
*/
private void free() {
garbage.clear();
}
}
}
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