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8020467: Inconsistency between usage.getUsed() and isUsageThresholdExceeded() with CMS Old Gen pool

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Reviewed-by: mchung, brutisso
This commit is contained in:
Jaroslav Bachorik 2013-10-30 17:54:48 +01:00
parent fed302b41d
commit 292c14d972
1 changed files with 9 additions and 2 deletions
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11
jdk/test/java/lang/management/MemoryPoolMXBean/ThresholdTest.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2007, 2013, 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
@ -28,7 +28,7 @@
* MemoryPoolMXBean.isCollectionThresholdExceeded().
* @author Mandy Chung
*
* @run main ThresholdTest
* @run main/othervm ThresholdTest
*/
import java.lang.management.*;
@ -36,6 +36,9 @@ import java.util.*;
public class ThresholdTest {
public static void main(String args[]) throws Exception {
long[] bigObject = new long[1000000];
System.gc(); // force an initial full-gc
List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
try {
for (MemoryPoolMXBean p : pools) {
@ -82,6 +85,10 @@ public class ThresholdTest {
}
p.setUsageThreshold(1);
// force a full gc to minimize the likelihood of running GC
// between getting the usage and checking the threshold
System.gc();
MemoryUsage u = p.getUsage();
if (u.getUsed() >= 1) {
if (!p.isUsageThresholdExceeded()) {