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annotate test/gc/metaspace/TestMetaspaceMemoryPools.java @ 8825:dbd5837b342f

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8000754: NPG: Implement a MemoryPool MXBean for Metaspace Reviewed-by: jmasa, stefank
author ehelin
date Fri, 22 Mar 2013 16:10:01 +0100
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8825
dbd5837b342f 8000754: NPG: Implement a MemoryPool MXBean for Metaspace
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1 import java.util.List;
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2 import java.lang.management.ManagementFactory;
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3 import java.lang.management.MemoryManagerMXBean;
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4 import java.lang.management.MemoryPoolMXBean;
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5 import java.lang.management.MemoryUsage;
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6
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7 /* @test TestMetaspaceMemoryPools
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8 * @bug 8000754
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9 * @summary Tests that two MemoryPoolMXBeans are created, one for metaspace and
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10 * one for class metaspace, is created and that a MemoryManagerMXBean
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11 * is created.
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12 * @run main/othervm TestMetaspaceMemoryPools defined undefined
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13 * @run main/othervm -XX:-UseCompressedKlassPointers TestMetaspaceMemoryPools undefined undefined
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14 * @run main/othervm -XX:-UseCompressedKlassPointers -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPools undefined defined
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15 */
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16 public class TestMetaspaceMemoryPools {
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17 public static void main(String[] args) {
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18 boolean isClassMetaspaceMaxDefined = args[0].equals("defined");
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19 boolean isMetaspaceMaxDefined = args[1].equals("defined");
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20
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21 verifyThatMetaspaceMemoryManagerExists();
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22
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23 verifyMemoryPool(getMemoryPool("Class Metaspace"), isClassMetaspaceMaxDefined);
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24 verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined);
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25 }
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26
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27 private static void verifyThatMetaspaceMemoryManagerExists() {
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28 List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
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29 for (MemoryManagerMXBean manager : managers) {
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30 if (manager.getName().equals("MetaspaceManager")) {
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31 return;
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32 }
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33 }
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34
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35 throw new RuntimeException("Expected to find a metaspace memory manager");
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36 }
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37
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38 private static MemoryPoolMXBean getMemoryPool(String name) {
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39 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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40 for (MemoryPoolMXBean pool : pools) {
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41 if (pool.getName().equals(name)) {
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42 return pool;
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43 }
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44 }
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45
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46 throw new RuntimeException("Expected to find a memory pool with name " + name);
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47 }
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48
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49 private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
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50 MemoryUsage mu = pool.getUsage();
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51 assertDefined(mu.getInit(), "init");
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52 assertDefined(mu.getUsed(), "used");
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53 assertDefined(mu.getCommitted(), "committed");
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54
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55 if (isMaxDefined) {
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56 assertDefined(mu.getMax(), "max");
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57 } else {
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58 assertUndefined(mu.getMax(), "max");
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59 }
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60 }
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61
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62 private static void assertDefined(long value, String name) {
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63 assertTrue(value != -1, "Expected " + name + " to be defined");
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64 }
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65
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66 private static void assertUndefined(long value, String name) {
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67 assertTrue(value == -1, "Expected " + name + " to be undefined");
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68 }
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69
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70 private static void assertTrue(boolean condition, String msg) {
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71 if (!condition) {
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72 throw new RuntimeException(msg);
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73 }
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74 }
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75 }