| /* |
| * Copyright (c) 2018, Red Hat, Inc. All rights reserved. |
| * |
| * 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 TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive |
| * -XX:+ShenandoahDegeneratedGC -Dprecise=true |
| * TestChurnNotifications |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive |
| * -XX:-ShenandoahDegeneratedGC -Dprecise=true |
| * TestChurnNotifications |
| */ |
| |
| /* |
| * @test TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive |
| * -Dprecise=false |
| * TestChurnNotifications |
| */ |
| |
| /* |
| * @test TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive |
| * -Dprecise=false |
| * TestChurnNotifications |
| */ |
| |
| /* |
| * @test TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static |
| * -Dprecise=false |
| * TestChurnNotifications |
| */ |
| |
| /* |
| * @test TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact |
| * -Dprecise=false |
| * TestChurnNotifications |
| */ |
| |
| /* |
| * @test TestChurnNotifications |
| * @summary Check that MX notifications are reported for all cycles |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @library /test/lib / |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive |
| * -Dprecise=false |
| * TestChurnNotifications |
| * |
| * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu |
| * -Dprecise=false |
| * TestChurnNotifications |
| */ |
| |
| import java.util.*; |
| import java.util.concurrent.atomic.*; |
| import javax.management.*; |
| import java.lang.management.*; |
| import javax.management.openmbean.*; |
| |
| import jdk.test.lib.Utils; |
| |
| import com.sun.management.GarbageCollectionNotificationInfo; |
| |
| public class TestChurnNotifications { |
| |
| static final long HEAP_MB = 128; // adjust for test configuration above |
| static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation |
| |
| // Should we track the churn precisely? |
| // Precise tracking is only reliable when GC is fully stop-the-world. Otherwise, |
| // we cannot tell, looking at heap used before/after, what was the GC churn. |
| static final boolean PRECISE = Boolean.getBoolean("precise"); |
| |
| static final long M = 1024 * 1024; |
| |
| static volatile Object sink; |
| |
| public static void main(String[] args) throws Exception { |
| final long startTime = System.currentTimeMillis(); |
| |
| final AtomicLong churnBytes = new AtomicLong(); |
| |
| NotificationListener listener = new NotificationListener() { |
| @Override |
| public void handleNotification(Notification n, Object o) { |
| if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) { |
| GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData()); |
| Map<String, MemoryUsage> mapBefore = info.getGcInfo().getMemoryUsageBeforeGc(); |
| Map<String, MemoryUsage> mapAfter = info.getGcInfo().getMemoryUsageAfterGc(); |
| |
| MemoryUsage before = mapBefore.get("Shenandoah"); |
| MemoryUsage after = mapAfter.get("Shenandoah"); |
| |
| if ((before != null) && (after != null)) { |
| long diff = before.getUsed() - after.getUsed(); |
| if (diff > 0) { |
| churnBytes.addAndGet(diff); |
| } |
| } |
| } |
| } |
| }; |
| |
| for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { |
| ((NotificationEmitter) bean).addNotificationListener(listener, null, null); |
| } |
| |
| final int size = 100_000; |
| long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size); |
| |
| long mem = count * (16 + 4 * size); |
| |
| for (int c = 0; c < count; c++) { |
| sink = new int[size]; |
| } |
| |
| System.gc(); |
| |
| long minExpected = PRECISE ? (mem - HEAP_MB * 1024 * 1024) : 1; |
| long maxExpected = mem + HEAP_MB * 1024 * 1024; |
| long actual = 0; |
| |
| // Look at test timeout to figure out how long we can wait without breaking into timeout. |
| // Default to 1/4 of the remaining time in 1s steps. |
| final long STEP_MS = 1000; |
| long spentTime = System.currentTimeMillis() - startTime; |
| long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - spentTime) / STEP_MS / 4; |
| |
| // Wait until enough notifications are accrued to match minimum boundary. |
| long tries = 0; |
| while (tries++ < maxTries) { |
| actual = churnBytes.get(); |
| if (minExpected <= actual) { |
| // Wait some more to test if we are breaking the maximum boundary. |
| Thread.sleep(5000); |
| actual = churnBytes.get(); |
| break; |
| } |
| Thread.sleep(STEP_MS); |
| } |
| |
| String msg = "Expected = [" + minExpected / M + "; " + maxExpected / M + "] (" + mem / M + "), actual = " + actual / M; |
| if (minExpected <= actual && actual <= maxExpected) { |
| System.out.println(msg); |
| } else { |
| throw new IllegalStateException(msg); |
| } |
| } |
| } |