--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/startupargs/TestOldObjectQueueSize.java 2019-01-29 11:05:39.247060750 +0800 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2015, 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. 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.testlibrary.jfr.EventNames; +import jdk.testlibrary.jfr.Events; +import jdk.testlibrary.jfr.StartupHelper; + +/* + * @test + * @summary Test -XX:FlightRecorderOptions=old-object-queue-size + * @modules jdk.jfr/jdk.jfr.internal.test + * @library /lib/testlibrary + * @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 -XX:-FastTLABRefill -XX:FlightRecorderOptions=old-object-queue-size=10000 jdk.jfr.startupargs.TestOldObjectQueueSize many + * @run main/othervm -XX:TLABSize=2k -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 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 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()); + } + } + } + } +}