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/*
* Copyright (c) 2014, 2022, 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.
*/
/*
* @test PoolsIndependenceTest
* @summary testing of getUsageThreshold()
* @modules java.base/jdk.internal.misc
* java.management
* @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:-UseCodeCacheFlushing -XX:-MethodFlushing
* -XX:+SegmentedCodeCache
* compiler.codecache.jmx.PoolsIndependenceTest
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:-UseCodeCacheFlushing -XX:-MethodFlushing
* -XX:-SegmentedCodeCache
* compiler.codecache.jmx.PoolsIndependenceTest
*/
package compiler.codecache.jmx;
import jdk.test.lib.Asserts;
import jdk.test.lib.Utils;
import jdk.test.whitebox.code.BlobType;
import javax.management.ListenerNotFoundException;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryNotificationInfo;
import java.lang.management.MemoryPoolMXBean;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import jtreg.SkippedException;
public class PoolsIndependenceTest implements NotificationListener {
private final Map<String, AtomicInteger> counters;
private final BlobType btype;
private volatile long lastEventTimestamp;
private volatile long maxUsageRegistered;
private final long TEST_TIMEOUT_LIMIT = System.currentTimeMillis() +
Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - 5_000; // 5 seconds allowance is arbitrary
public PoolsIndependenceTest(BlobType btype) {
counters = new HashMap<>();
for (BlobType bt : BlobType.getAvailable()) {
counters.put(bt.getMemoryPool().getName(), new AtomicInteger(0));
}
this.btype = btype;
lastEventTimestamp = 0;
maxUsageRegistered = 0;
CodeCacheUtils.disableCollectionUsageThresholds();
}
public static void main(String[] args) {
for (BlobType bt : BlobType.getAvailable()) {
new PoolsIndependenceTest(bt).runTest();
}
}
protected void runTest() {
MemoryPoolMXBean bean = btype.getMemoryPool();
System.out.printf("INFO: Starting scenario with %s%n", bean.getName());
((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
addNotificationListener(this, null, null);
final long usageThresholdLimit = bean.getUsage().getUsed() + 1;
bean.setUsageThreshold(usageThresholdLimit);
long beginTimestamp = System.currentTimeMillis();
final long phaseTimeout = Math.min(TEST_TIMEOUT_LIMIT,
beginTimestamp + 20_000); // 20 seconds is enought for everybody.
CodeCacheUtils.WB.allocateCodeBlob(
CodeCacheUtils.ALLOCATION_SIZE, btype.id);
CodeCacheUtils.WB.fullGC();
/* waiting for expected event to be received plus double the time took
to receive expected event(for possible unexpected) and
plus 1 second in case expected event received (almost)immediately */
Utils.waitForCondition(() -> {
maxUsageRegistered = Math.max(bean.getUsage().getUsed(), maxUsageRegistered);
long currentTimestamp = System.currentTimeMillis();
int eventsCount
= counters.get(btype.getMemoryPool().getName()).get();
if (eventsCount > 0) {
if (eventsCount > 1) {
return true;
}
long timeLastEventTook
= lastEventTimestamp - beginTimestamp;
long awaitForUnexpectedTimeout
= 1000L + beginTimestamp + 3L * timeLastEventTook;
return currentTimestamp > Math.min(phaseTimeout, awaitForUnexpectedTimeout);
};
if (currentTimestamp > phaseTimeout) {
if (maxUsageRegistered < usageThresholdLimit) {
throw new SkippedException("The code cache usage hasn't exceeded" +
" the limit of " + usageThresholdLimit +
" (max usage reached is " + maxUsageRegistered + ")" +
" within test timeouts, can't test notifications");
} else {
Asserts.fail("UsageThresholdLimit was set to " + usageThresholdLimit +
", max usage of " + maxUsageRegistered + " have been registered" +
", but no notifications issued");
}
}
return false;
});
for (BlobType bt : BlobType.getAvailable()) {
int expectedNotificationsAmount = bt.equals(btype) ? 1 : 0;
CodeCacheUtils.assertEQorGTE(btype, counters.get(bt.getMemoryPool().getName()).get(),
expectedNotificationsAmount, String.format("Unexpected "
+ "amount of notifications for pool: %s",
bt.getMemoryPool().getName()));
}
try {
((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
removeNotificationListener(this);
} catch (ListenerNotFoundException ex) {
throw new AssertionError("Can't remove notification listener", ex);
}
System.out.printf("INFO: Scenario with %s finished%n", bean.getName());
}
@Override
public void handleNotification(Notification notification, Object handback) {
String nType = notification.getType();
String poolName
= CodeCacheUtils.getPoolNameFromNotification(notification);
// consider code cache events only
if (CodeCacheUtils.isAvailableCodeHeapPoolName(poolName)) {
Asserts.assertEQ(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED,
nType, "Unexpected event received: " + nType);
// receiving events from available CodeCache-related beans only
if (counters.get(poolName) != null) {
counters.get(poolName).incrementAndGet();
lastEventTimestamp = System.currentTimeMillis();
}
}
}
}
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