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/*
* Copyright (c) 2019, 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.gclocker;
/*
* @test TestExcessGCLockerCollections
* @key gc
* @bug 8048556
* @summary Check for GC Locker initiated GCs that immediately follow another
* GC and so have very little needing to be collected.
* @requires vm.gc != "Z"
* @requires vm.gc != "Epsilon"
* @requires vm.gc != "Shenandoah"
* @library /test/lib
* @modules java.base/jdk.internal.misc
* @run driver/timeout=1000 gc.stress.gclocker.TestExcessGCLockerCollections 300 4 2
*/
import java.util.HashMap;
import java.util.Map;
import java.util.zip.Deflater;
import java.util.ArrayList;
import java.util.Arrays;
import jdk.test.lib.Asserts;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
class TestExcessGCLockerCollectionsAux {
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 = 128 * 1024;
static private void println(String str) { System.out.println(str); }
static private volatile boolean keepRunning = true;
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 (keepRunning) {
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);
count += 1;
}
public void run() {
while (keepRunning) {
doStep();
}
}
}
static public Map<Integer,String> largeMap;
static public void main(String args[]) {
long durationSec = Long.parseLong(args[0]);
int allocThreadNum = Integer.parseInt(args[1]);
int jniCriticalThreadNum = Integer.parseInt(args[2]);
println("Running for " + durationSec + " secs");
largeMap = populateMap(LARGE_MAP_SIZE);
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();
}
long durationMS = (long) (1000 * durationSec);
long start = System.currentTimeMillis();
long now = start;
long soFar = now - start;
while (soFar < durationMS) {
try {
Thread.sleep(durationMS - soFar);
} catch (Exception e) {
}
now = System.currentTimeMillis();
soFar = now - start;
}
println("Done.");
keepRunning = false;
}
}
public class TestExcessGCLockerCollections {
private static final String locker =
"\\[gc\\s*\\] .* \\(GCLocker Initiated GC\\)";
private static final String ANY_LOCKER = locker + " [1-9][0-9]*M";
private static final String BAD_LOCKER = locker + " [1-9][0-9]?M";
private static final String[] COMMON_OPTIONS = new String[] {
"-Xmx1G", "-Xms1G", "-Xmn256M", "-Xlog:gc" };
public static void main(String args[]) throws Exception {
if (args.length < 3) {
System.out.println("usage: TestExcessGCLockerCollectionsAux" +
" <duration sec> <alloc threads>" +
" <jni critical threads>");
throw new RuntimeException("Invalid arguments");
}
ArrayList<String> finalArgs = new ArrayList<String>();
finalArgs.addAll(Arrays.asList(COMMON_OPTIONS));
finalArgs.add(TestExcessGCLockerCollectionsAux.class.getName());
finalArgs.addAll(Arrays.asList(args));
// GC and other options obtained from test framework.
OutputAnalyzer output = ProcessTools.executeTestJvm(finalArgs);
output.shouldHaveExitValue(0);
//System.out.println("------------- begin stdout ----------------");
//System.out.println(output.getStdout());
//System.out.println("------------- end stdout ----------------");
output.stdoutShouldMatch(ANY_LOCKER);
output.stdoutShouldNotMatch(BAD_LOCKER);
}
}
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