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test/jdk/jdk/jfr/event/gc/collection/TestG1ParallelPhases.java
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rev 57794 : [mq]: 8237079-lkorinth-review
*** 1,7 ****
/*
! * Copyright (c) 2018, 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
--- 1,7 ----
/*
! * Copyright (c) 2018, 2020, 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
*** 30,40 ****
import static java.util.Set.of;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
import static java.util.stream.Collectors.toSet;
import static java.util.stream.IntStream.range;
- import static jdk.jfr.event.gc.collection.Provoker.provokeMixedGC;
import static jdk.test.lib.Asserts.assertEquals;
import static jdk.test.lib.Asserts.assertTrue;
import static jdk.test.lib.jfr.Events.fromRecording;
import static sun.hotspot.WhiteBox.getWhiteBox;
--- 30,39 ----
*** 44,64 ****
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import jdk.jfr.Recording;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.EventNames;
import sun.hotspot.WhiteBox;
/**
* @test
* @key jfr
* @requires vm.hasJFR
* @requires vm.gc == "G1" | vm.gc == null
! * @library /test/lib /test/jdk
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+AlwaysTenure
* -Xms20M -Xmx20M -Xlog:gc=debug,gc+heap*=debug,gc+ergo*=debug,gc+start=debug
* -XX:G1MixedGCLiveThresholdPercent=100 -XX:G1HeapWastePercent=0 -XX:G1HeapRegionSize=1m
--- 43,64 ----
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Set;
+ import gc.testlibrary.g1.MixedGCProvoker;
import jdk.jfr.Recording;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.EventNames;
import sun.hotspot.WhiteBox;
/**
* @test
* @key jfr
* @requires vm.hasJFR
* @requires vm.gc == "G1" | vm.gc == null
! * @library /test/lib /test/jdk /test/hotspot/jtreg
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+AlwaysTenure
* -Xms20M -Xmx20M -Xlog:gc=debug,gc+heap*=debug,gc+ergo*=debug,gc+start=debug
* -XX:G1MixedGCLiveThresholdPercent=100 -XX:G1HeapWastePercent=0 -XX:G1HeapRegionSize=1m
*** 79,89 ****
weakRefs = range(1, 30)
.mapToObj(n -> new WeakReference<>(new byte[1_000_000]))
.collect(toList()); // force evaluation of lazy stream (all weak refs must be created)
final var MEG = 1024 * 1024;
! provokeMixedGC(1 * MEG);
recording.stop();
Set<String> usedPhases = fromRecording(recording).stream()
.map(e -> e.getValue("name").toString())
.collect(toSet());
--- 79,89 ----
weakRefs = range(1, 30)
.mapToObj(n -> new WeakReference<>(new byte[1_000_000]))
.collect(toList()); // force evaluation of lazy stream (all weak refs must be created)
final var MEG = 1024 * 1024;
! MixedGCProvoker.allocateAndProvokeMixedGC(MEG);
recording.stop();
Set<String> usedPhases = fromRecording(recording).stream()
.map(e -> e.getValue("name").toString())
.collect(toSet());
*** 129,194 ****
assertTrue(usedPhases.equals(allPhases), "Compare events expected and received"
+ ", Not found phases: " + allPhases.stream().filter(p -> !usedPhases.contains(p)).collect(joining(", "))
+ ", Not expected phases: " + usedPhases.stream().filter(p -> !allPhases.contains(p)).collect(joining(", ")));
}
}
-
- /**
- * Utility class to guarantee a mixed GC. The class allocates several arrays and
- * promotes them to the oldgen. After that it tries to provoke mixed GC by
- * allocating new objects.
- */
- class Provoker {
- private static void allocateOldObjects(
- List<byte[]> liveOldObjects,
- int g1HeapRegionSize,
- int arraySize) {
-
- var toUnreachable = new ArrayList<byte[]>();
-
- // Allocates buffer and promotes it to the old gen. Mix live and dead old objects.
- // allocate about two regions of old memory. At least one full old region will guarantee
- // mixed collection in the future
- range(0, g1HeapRegionSize/arraySize).forEach(n -> {
- liveOldObjects.add(new byte[arraySize]);
- toUnreachable.add(new byte[arraySize]);
- });
-
- // Do one young collection, AlwaysTenure will force promotion.
- getWhiteBox().youngGC();
-
- // Check it is promoted & keep alive
- Asserts.assertTrue(getWhiteBox().isObjectInOldGen(liveOldObjects), "List of the objects is suppose to be in OldGen");
- Asserts.assertTrue(getWhiteBox().isObjectInOldGen(toUnreachable), "List of the objects is suppose to be in OldGen");
- }
-
- private static void waitTillCMCFinished(int sleepTime) {
- while (getWhiteBox().g1InConcurrentMark()) {
- try {sleep(sleepTime);} catch (Exception e) {}
- }
- }
-
- /**
- * The necessary condition for guaranteed mixed GC is running in VM with the following flags:
- * -XX:+UnlockExperimentalVMOptions -XX:+AlwaysTenure -Xms{HEAP_SIZE}M
- * -Xmx{HEAP_SIZE}M -XX:G1MixedGCLiveThresholdPercent=100 -XX:G1HeapWastePercent=0
- * -XX:G1HeapRegionSize={REGION_SIZE}m
- *
- * @param g1HeapRegionSize The size of your regions in bytes
- */
- public static void provokeMixedGC(int g1HeapRegionSize) {
- final var arraySize = 20_000;
- var liveOldObjects = new ArrayList<byte[]>();
-
- // Make sure the heap is in a known state.
- getWhiteBox().fullGC();
- allocateOldObjects(liveOldObjects, g1HeapRegionSize, arraySize);
- waitTillCMCFinished(10);
- getWhiteBox().g1StartConcMarkCycle();
- waitTillCMCFinished(10);
- getWhiteBox().youngGC();
- getWhiteBox().youngGC();
-
- // check that liveOldObjects still alive
- assertTrue(getWhiteBox().isObjectInOldGen(liveOldObjects), "List of the objects is suppose to be in OldGen");
- }
- }
--- 129,133 ----
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