| /* |
| * Copyright (c) 2013, 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.event.gc.detailed; |
| |
| import java.time.Duration; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.Random; |
| |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| |
| /* |
| * @test |
| * @key jfr |
| * @requires vm.gc == "G1" | vm.gc == null |
| * @library /test/lib /test/jdk |
| * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:G1HeapRegionSize=1m -Xmx64m -Xmn16m -XX:+UseG1GC jdk.jfr.event.gc.detailed.TestEvacuationInfoEvent |
| */ |
| public class TestEvacuationInfoEvent { |
| private final static String EVENT_INFO_NAME = EventNames.EvacuationInfo; |
| private final static String EVENT_FAILED_NAME = EventNames.EvacuationFailed; |
| |
| public static void main(String[] args) throws Throwable { |
| final long g1HeapRegionSize = 1024 * 1024; |
| Recording recording = new Recording(); |
| recording.enable(EVENT_INFO_NAME).withThreshold(Duration.ofMillis(0)); |
| recording.enable(EVENT_FAILED_NAME).withThreshold(Duration.ofMillis(0)); |
| recording.start(); |
| allocate(); |
| recording.stop(); |
| |
| List<RecordedEvent> events = Events.fromRecording(recording); |
| Asserts.assertFalse(events.isEmpty(), "No events found"); |
| for (RecordedEvent event : events) { |
| if (!Events.isEventType(event, EVENT_INFO_NAME)) { |
| continue; |
| } |
| System.out.println("Event: " + event); |
| |
| int setRegions = Events.assertField(event, "cSetRegions").atLeast(0).getValue(); |
| long setUsedAfter = Events.assertField(event, "cSetUsedAfter").atLeast(0L).getValue(); |
| long setUsedBefore = Events.assertField(event, "cSetUsedBefore").atLeast(setUsedAfter).getValue(); |
| int allocationRegions = Events.assertField(event, "allocationRegions").atLeast(0).getValue(); |
| long allocRegionsUsedBefore = Events.assertField(event, "allocRegionsUsedBefore").atLeast(0L).getValue(); |
| long allocRegionsUsedAfter = Events.assertField(event, "allocRegionsUsedAfter").atLeast(0L).getValue(); |
| long bytesCopied = Events.assertField(event, "bytesCopied").atLeast(0L).getValue(); |
| int regionsFreed = Events.assertField(event, "regionsFreed").atLeast(0).getValue(); |
| |
| Asserts.assertEquals(allocRegionsUsedBefore + bytesCopied, allocRegionsUsedAfter, "allocRegionsUsedBefore + bytesCopied = allocRegionsUsedAfter"); |
| Asserts.assertGreaterThanOrEqual(setRegions, regionsFreed, "setRegions >= regionsFreed"); |
| Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * allocationRegions, allocRegionsUsedAfter, "G1HeapRegionSize * allocationRegions >= allocationRegionsUsedAfter"); |
| Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * setRegions, setUsedAfter, "G1HeapRegionSize * setRegions >= setUsedAfter"); |
| Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * setRegions, setUsedBefore, "G1HeapRegionSize * setRegions >= setUsedBefore"); |
| Asserts.assertGreaterThanOrEqual(g1HeapRegionSize, allocRegionsUsedBefore, "G1HeapRegionSize >= allocRegionsUsedBefore"); |
| |
| int gcId = Events.assertField(event, "gcId").getValue(); |
| boolean isEvacuationFailed = containsEvacuationFailed(events, gcId); |
| if (isEvacuationFailed) { |
| Asserts.assertGreaterThan(setUsedAfter, 0L, "EvacuationFailure -> setUsedAfter > 0"); |
| Asserts.assertGreaterThan(setRegions, regionsFreed, "EvacuationFailure -> setRegions > regionsFreed"); |
| } else { |
| Asserts.assertEquals(setUsedAfter, 0L, "No EvacuationFailure -> setUsedAfter = 0"); |
| Asserts.assertEquals(setRegions, regionsFreed, "No EvacuationFailure -> setRegions = regionsFreed"); |
| } |
| } |
| } |
| |
| private static boolean containsEvacuationFailed(List<RecordedEvent> events, int gcId) { |
| Optional<RecordedEvent> failedEvent = events.stream() |
| .filter(e -> Events.isEventType(e, EVENT_FAILED_NAME)) |
| .filter(e -> gcId == (int)Events.assertField(e, "gcId").getValue()) |
| .findAny(); |
| System.out.println("Failed event: " + (failedEvent.isPresent() ? failedEvent.get() : "None")); |
| return failedEvent.isPresent(); |
| } |
| |
| public static DummyObject[] dummys = new DummyObject[6000]; |
| |
| /** |
| * Allocate memory to trigger garbage collections. |
| * We want the allocated objects to have different life time, because we want both "young" and "old" objects. |
| * This is done by keeping the objects in an array and step the current index by a small random number in the loop. |
| * The loop will continue until we have allocated a fixed number of bytes. |
| */ |
| private static void allocate() { |
| Random r = new Random(0); |
| long bytesToAllocate = 256 * 1024 * 1024; |
| int currPos = 0; |
| while (bytesToAllocate > 0) { |
| int allocSize = 1000 + (r.nextInt(4000)); |
| bytesToAllocate -= allocSize; |
| dummys[currPos] = new DummyObject(allocSize); |
| |
| // Skip a few positions to get different duration on the objects. |
| currPos = (currPos + r.nextInt(20)) % dummys.length; |
| } |
| for (int c=0; c<dummys.length; c++) { |
| dummys[c] = null; |
| } |
| System.gc(); |
| } |
| |
| public static class DummyObject { |
| public byte[] payload; |
| DummyObject(int size) { |
| payload = new byte[size]; |
| } |
| } |
| } |