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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
* @test G1 Full GC execution when JNICritical is active
* @summary Check that Full GC calls are not ignored if concurrent with an active GCLocker.
* @bug 8057586
* @requires vm.gc.G1
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC -Xms1g -Xmx1g -Xlog:gc TestJNICriticalStressTest 30 4 4 G1
*/
/*
* @test Parallel Full GC execution when JNICritical is active
* @bug 8057586
* @requires vm.gc.Parallel
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseParallelGC -Xms1g -Xmx1g -Xlog:gc TestJNICriticalStressTest 30 4 4 Parallel
*/
/*
* @test Serial Full GC execution when JNICritical is active
* @bug 8057586
* @requires vm.gc.Serial
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseSerialGC -Xms1g -Xmx1g -Xlog:gc TestJNICriticalStressTest 30 4 4 Serial
*/
import jdk.test.lib.Asserts;
import jdk.test.whitebox.WhiteBox;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.Deflater;
/**
* Test verifies that Full GC calls are not ignored if concurrent with an active GCLocker.
*
* The test checks that at least a full gc is executed in the duration of a WhiteBox.fullGC() call;
* either by the calling thread or a concurrent thread.
*/
public class TestJNICriticalStressTest {
private static final WhiteBox wb = WhiteBox.getWhiteBox();
static private final int LARGE_MAP_SIZE = 64 * 1024;
static private final int MAP_ARRAY_LENGTH = 4;
static private final int MAP_SIZE = 1024;
static private final int BYTE_ARRAY_LENGTH = 16 * 1024;
static private final long SYSTEM_GC_PERIOD_MS = 5 * 1000;
static private long gcCountBefore = 0;
static private GarbageCollectorMXBean collector = null;
static private void println(String str) { System.out.println(str); }
static private void exit(int code) { System.exit(code); }
static Map<Integer,String> populateMap(int size) {
Map<Integer,String> map = new HashMap<Integer,String>();
for (int i = 0; i < size; i += 1) {
Integer keyInt = Integer.valueOf(i);
String valStr = "value is [" + i + "]";
map.put(keyInt,valStr);
}
return map;
}
static private class AllocatingWorker implements Runnable {
private final Object[] array = new Object[MAP_ARRAY_LENGTH];
private int arrayIndex = 0;
private void doStep() {
Map<Integer,String> map = populateMap(MAP_SIZE);
array[arrayIndex] = map;
arrayIndex = (arrayIndex + 1) % MAP_ARRAY_LENGTH;
}
public void run() {
while (true) {
doStep();
}
}
}
static private class JNICriticalWorker implements Runnable {
private int count;
private void doStep() {
byte[] inputArray = new byte[BYTE_ARRAY_LENGTH];
for (int i = 0; i < inputArray.length; i += 1) {
inputArray[i] = (byte) (count + i);
}
Deflater deflater = new Deflater();
deflater.setInput(inputArray);
deflater.finish();
byte[] outputArray = new byte[2 * inputArray.length];
deflater.deflate(outputArray);
deflater.end();
count += 1;
}
public void run() {
while (true) {
doStep();
}
}
}
static private class SystemGCWorker implements Runnable {
public void run() {
long fullGcCounts = 0;
while (true) {
try {
Thread.sleep(SYSTEM_GC_PERIOD_MS);
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
long gcCountBefore = collector.getCollectionCount();
wb.fullGC();
long gcCountAfter = collector.getCollectionCount();
Asserts.assertLessThan(gcCountBefore, gcCountAfter, "Triggered more Full GCs than expected");
}
}
}
static public Map<Integer,String> largeMap;
public static void main(String... args) throws Exception {
if (args.length < 4) {
println("usage: JNICriticalStressTest <duration sec> <alloc threads> <jni critical threads> <gc name>");
exit(-1);
}
long durationSec = Long.parseLong(args[0]);
int allocThreadNum = Integer.parseInt(args[1]);
int jniCriticalThreadNum = Integer.parseInt(args[2]);
StringBuilder OldGCName = new StringBuilder();
switch (args[3]) {
case "G1":
OldGCName.append("G1 Old Generation");
break;
case "Parallel":
OldGCName.append("PS MarkSweep");
break;
case "Serial":
OldGCName.append("MarkSweepCompact");
break;
default:
throw new RuntimeException("Unsupported GC selected");
}
List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
for (int i = 0; i < collectors.size(); i++) {
if (collectors.get(i).getName().contains(OldGCName.toString())) {
collector = collectors.get(i);
break;
}
}
if (collector == null) {
throw new RuntimeException(OldGCName.toString() + " not found");
}
println("Running for " + durationSec + " secs");
largeMap = populateMap(LARGE_MAP_SIZE);
// Start threads to allocate memory, this will trigger both GCLocker initiated
// garbage collections (GCs) and regular GCs. Thus increasing the likelihood of
// having different types of GCs happening concurrently with the System.gc call.
println("Starting " + allocThreadNum + " allocating threads");
for (int i = 0; i < allocThreadNum; i += 1) {
new Thread(new AllocatingWorker()).start();
}
println("Starting " + jniCriticalThreadNum + " jni critical threads");
for (int i = 0; i < jniCriticalThreadNum; i += 1) {
new Thread(new JNICriticalWorker()).start();
}
new Thread(new SystemGCWorker()).start();
long durationMS = (long) (1000 * durationSec);
try {
Thread.sleep(durationMS);
} catch (InterruptedException e) {
e.printStackTrace();
exit(-1);
}
}
}