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/*
* Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2017, SAP SE 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.TestJNIBlockFullGC;
/*
* @test TestJNIBlockFullGC
* @summary Check that in G1 a Full GC to reclaim space can not be blocked out by the GC locker.
* @key gc randomness
* @requires vm.gc.G1
* @library /test/lib
* @run main/othervm/native -Xmx64m -XX:+UseG1GC -Xlog:gc=info,gc+alloc=trace -XX:MaxGCPauseMillis=10 gc.stress.TestJNIBlockFullGC.TestJNIBlockFullGC 10 10000 10000 10000 30000 10000 0.7
*/
import java.lang.ref.SoftReference;
import java.util.Random;
import jdk.test.lib.Utils;
public class TestJNIBlockFullGC {
private static final Random rng = Utils.getRandomInstance();
static {
System.loadLibrary("TestJNIBlockFullGC");
}
public static volatile Object tmp;
public static volatile boolean hadError = false;
private static native int TestCriticalArray0(int[] x);
public static class Node {
public SoftReference<Node> next;
long payload1;
long payload2;
long payload3;
long payload4;
public Node(int load) {
payload1 = payload2 = payload3 = payload4 = load;
}
}
public static void warmUp(long warmupEndTime, int size, long seed) {
Random r = new Random(seed);
// First let the GC assume most of our objects will die.
Node[] roots = new Node[size];
while (System.currentTimeMillis() < warmupEndTime) {
int index = (int) (r.nextDouble() * roots.length);
roots[index] = new Node(1);
}
// Make sure the young generation is empty.
for (int i = 0; i < roots.length; ++i) {
roots[i] = null;
}
}
public static void runTest(long endTime, int size, double alive, long seed) {
Random r = new Random(seed);
final int length = 10000;
int[] array1 = new int[length];
for (int x = 1; x < length; x++) {
array1[x] = x;
}
Node[] roots = new Node[size];
try {
int index = 0;
roots[0] = new Node(0);
while (!hadError && (System.currentTimeMillis() < endTime)) {
int test_val1 = TestCriticalArray0(array1);
if (r.nextDouble() > alive) {
tmp = new Node(test_val1);
} else {
index = (int) (r.nextDouble() * roots.length);
if (roots[index] != null) {
Node node = new Node(test_val1);
node.next = new SoftReference<Node>(roots[index]);
roots[index] = node;
} else {
roots[index] = new Node(test_val1);
}
}
}
} catch (OutOfMemoryError e) {
hadError = true;
e.printStackTrace();
}
}
private static void joinThreads(Thread[] threads) throws Exception {
for (int i = 0; i < threads.length; i++) {
try {
if (threads[i] != null) {
threads[i].join();
}
} catch (InterruptedException e) {
e.printStackTrace();
throw e;
}
}
}
public static void main(String[] args) throws Exception {
if (args.length < 7){
System.out.println("Usage: java TestJNIBlockFullGC <warmupThreads> <warmup-time-in-millis> <warmup iterations> <threads> <time-in-millis> <iterations> <aliveFrac>");
System.exit(0);
}
int warmupThreads = Integer.parseInt(args[0]);
System.out.println("# Warmup Threads = " + warmupThreads);
int warmupDuration = Integer.parseInt(args[1]);
System.out.println("WarmUp Duration = " + warmupDuration);
int warmupIterations = Integer.parseInt(args[2]);
System.out.println("# Warmup Iterations = "+ warmupIterations);
int mainThreads = Integer.parseInt(args[3]);
System.out.println("# Main Threads = " + mainThreads);
int mainDuration = Integer.parseInt(args[4]);
System.out.println("Main Duration = " + mainDuration);
int mainIterations = Integer.parseInt(args[5]);
System.out.println("# Main Iterations = " + mainIterations);
double liveFrac = Double.parseDouble(args[6]);
System.out.println("Live Fraction = " + liveFrac);
Thread threads[] = new Thread[Math.max(warmupThreads, mainThreads)];
System.out.println("Start warm-up threads!");
long warmupStartTime = System.currentTimeMillis();
for (int i = 0; i < warmupThreads; i++) {
long seed = rng.nextLong();
threads[i] = new Thread() {
public void run() {
warmUp(warmupStartTime + warmupDuration, warmupIterations, seed);
};
};
threads[i].start();
}
joinThreads(threads);
System.gc();
System.out.println("Keep alive a lot");
long startTime = System.currentTimeMillis();
for (int i = 0; i < mainThreads; i++) {
long seed = rng.nextLong();
threads[i] = new Thread() {
public void run() {
runTest(startTime + mainDuration, mainIterations, liveFrac, seed);
};
};
threads[i].start();
}
System.out.println("All threads started");
joinThreads(threads);
if (hadError) {
throw new RuntimeException("Experienced an OoME during execution.");
}
}
}
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