| /* |
| * Copyright (c) 2015, 2018, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 jdk.jfr.startupargs; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.jfr.internal.test.WhiteBox; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| |
| /* |
| * @test |
| * @summary Test -XX:FlightRecorderOptions=old-object-queue-size |
| * @modules jdk.jfr/jdk.jfr.internal.test |
| * @library /test/lib |
| * @key jfr |
| * |
| * @run main/othervm -XX:TLABSize=2k -XX:-FastTLABRefill -XX:FlightRecorderOptions=old-object-queue-size=0 jdk.jfr.startupargs.TestOldObjectQueueSize off |
| * @run main/othervm -XX:TLABSize=2k -Xlog:gc+tlab=trace -XX:-FastTLABRefill -XX:FlightRecorderOptions=old-object-queue-size=10000 jdk.jfr.startupargs.TestOldObjectQueueSize many |
| * @run main/othervm -XX:TLABSize=2k -Xlog:gc+tlab=trace -XX:-FastTLABRefill -XX:FlightRecorderOptions=old-object-queue-size=1000000 jdk.jfr.startupargs.TestOldObjectQueueSize many |
| */ |
| public class TestOldObjectQueueSize { |
| |
| private static final int OBJECT_COUNT = 10_000; |
| private static final int DEFAULT_OLD_OBJECT_QUEUE_SIZE = 256; |
| |
| public final static List<Object> leak = new ArrayList<>(OBJECT_COUNT); |
| |
| public static void main(String[] args) throws Exception { |
| WhiteBox.setWriteAllObjectSamples(true); |
| System.out.println("TESTING: " + args[0]); |
| |
| String amount = args[0]; |
| try (Recording recording = new Recording()) { |
| recording.enable(EventNames.OldObjectSample).withoutStackTrace().with("cutoff", "infinity"); |
| recording.start(); |
| // It's hard to get a larger number of samples without running into OOM |
| // since the TLAB size increases when there is more allocation. |
| // Allocate 200 MB, which should give at least 400 samples if the TLAB |
| // size manages to stay below 512kb, which logging with -Xlog:gc+tlab=trace indicates. |
| for (int i = 0; i < OBJECT_COUNT; i++) { |
| leak.add(new byte[20_000]); |
| } |
| recording.stop(); |
| List<RecordedEvent> events = Events.fromRecording(recording); |
| System.out.println("Found samples: " + events.size()); |
| if (amount.equals("off")) { |
| if (!events.isEmpty()) { |
| throw new Exception("No objects shuld be emitted when queue size 0"); |
| } |
| } |
| if (amount.equals("many")) { |
| // Sanity check that we at least have managed to set a value above the default |
| if (events.size() <= DEFAULT_OLD_OBJECT_QUEUE_SIZE) { |
| throw new Exception("Should be at least be " + DEFAULT_OLD_OBJECT_QUEUE_SIZE + ", but found " + events.size()); |
| } |
| } |
| } |
| } |
| } |