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   2 
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   7  This code is free software; you can redistribute it and/or modify it
   8  under the terms of the GNU General Public License version 2 only, as
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  11  This code is distributed in the hope that it will be useful, but WITHOUT
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  13  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  version 2 for more details (a copy is included in the LICENSE file that
  15  accompanied this code).
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  17  You should have received a copy of the GNU General Public License version
  18  2 along with this work; if not, write to the Free Software Foundation,
  19  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  21  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  26 
  27 <Metadata>
  28 
  29   <Event name="ThreadStart" category="Java Application" label="Java Thread Start" thread="true" startTime="false">
  30     <Field type="Thread" name="thread" label="Java Thread" />
  31   </Event>
  32 
  33   <Event name="ThreadEnd" category="Java Application" label="Java Thread End" thread="true" startTime="false">
  34     <Field type="Thread" name="thread" label="Java Thread" />
  35   </Event>
  36 
  37   <Event name="ThreadSleep" category="Java Application" label="Java Thread Sleep" thread="true" stackTrace="true">
  38     <Field type="long" contentType="millis" name="time" label="Sleep Time" />
  39   </Event>
  40 
  41   <Event name="ThreadPark" category="Java Application" label="Java Thread Park" thread="true" stackTrace="true">
  42     <Field type="Class" name="parkedClass" label="Class Parked On" />
  43     <Field type="long" contentType="nanos" name="timeout" label="Park Timeout" />
  44     <Field type="long" contentType="epochmillis" name="until" label="Park Until" />
  45     <Field type="ulong" contentType="address" name="address" label="Address of Object Parked" relation="JavaMonitorAddress" />
  46   </Event>
  47 
  48   <Event name="JavaMonitorEnter" category="Java Application" label="Java Monitor Blocked" thread="true" stackTrace="true">
  49     <Field type="Class" name="monitorClass" label="Monitor Class" />
  50     <Field type="Thread" name="previousOwner" label="Previous Monitor Owner" />
  51     <Field type="ulong" contentType="address" name="address" label="Monitor Address" relation="JavaMonitorAddress" />
  52   </Event>
  53 
  54   <Event name="JavaMonitorWait" category="Java Application" label="Java Monitor Wait" description="Waiting on a Java monitor" thread="true" stackTrace="true">
  55     <Field type="Class" name="monitorClass" label="Monitor Class" description="Class of object waited on" />
  56     <Field type="Thread" name="notifier" label="Notifier Thread" description="Notifying Thread" />
  57     <Field type="long" contentType="millis" name="timeout" label="Timeout" description="Maximum wait time" />
  58     <Field type="boolean" name="timedOut" label="Timed Out" description="Wait has been timed out" />
  59     <Field type="ulong" contentType="address" name="address" label="Monitor Address" description="Address of object waited on" relation="JavaMonitorAddress" />
  60   </Event>
  61 
  62   <Event name="JavaMonitorInflate" category="Java Application" label="Java Monitor Inflated" thread="true" stackTrace="true">
  63     <Field type="Class" name="monitorClass" label="Monitor Class" />
  64     <Field type="ulong" contentType="address" name="address" label="Monitor Address" relation="JavaMonitorAddress" />
  65     <Field type="InflateCause" name="cause" label="Monitor Inflation Cause" description="Cause of inflation" />
  66   </Event>
  67 
  68   <Event name="BiasedLockRevocation" category="Java Virtual Machine, Runtime" label="Biased Lock Revocation" description="Revoked bias of object" thread="true"
  69     stackTrace="true">
  70     <Field type="Class" name="lockClass" label="Lock Class" description="Class of object whose biased lock was revoked" />
  71     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
  72     <Field type="Thread" name="previousOwner" label="Previous Owner" description="Thread owning the bias before revocation" />
  73   </Event>
  74 
  75   <Event name="BiasedLockSelfRevocation" category="Java Virtual Machine, Runtime" label="Biased Lock Self Revocation" description="Revoked bias of object biased towards own thread"
  76     thread="true" stackTrace="true">
  77     <Field type="Class" name="lockClass" label="Lock Class" description="Class of object whose biased lock was revoked" />
  78   </Event>
  79 
  80   <Event name="BiasedLockClassRevocation" category="Java Virtual Machine, Runtime" label="Biased Lock Class Revocation" description="Revoked biases for all instances of a class"
  81     thread="true" stackTrace="true">
  82     <Field type="Class" name="revokedClass" label="Revoked Class" description="Class whose biased locks were revoked" />
  83     <Field type="boolean" name="disableBiasing" label="Disable Further Biasing" description="Whether further biasing for instances of this class will be allowed" />
  84     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
  85   </Event>
  86 
  87   <Event name="ReservedStackActivation" category="Java Virtual Machine, Runtime" label="Reserved Stack Activation"
  88     description="Activation of Reserved Stack Area caused by stack overflow with ReservedStackAccess annotated method in call stack" thread="true" stackTrace="true"
  89     startTime="false">
  90     <Field type="Method" name="method" label="Java Method" />
  91   </Event>
  92 
  93   <Event name="ClassLoad" category="Java Virtual Machine, Class Loading" label="Class Load" thread="true" stackTrace="true">
  94     <Field type="Class" name="loadedClass" label="Loaded Class" />
  95     <Field type="ClassLoader" name="definingClassLoader" label="Defining Class Loader" />
  96     <Field type="ClassLoader" name="initiatingClassLoader" label="Initiating Class Loader" />
  97   </Event>
  98 
  99   <Event name="ClassDefine" category="Java Virtual Machine, Class Loading" label="Class Define" thread="true" stackTrace="true" startTime="false">
 100     <Field type="Class" name="definedClass" label="Defined Class" />
 101     <Field type="ClassLoader" name="definingClassLoader" label="Defining Class Loader" />
 102   </Event>
 103 
 104   <Event name="ClassUnload" category="Java Virtual Machine, Class Loading" label="Class Unload" thread="true" startTime="false">
 105     <Field type="Class" name="unloadedClass" label="Unloaded Class" />
 106     <Field type="ClassLoader" name="definingClassLoader" label="Defining Class Loader" />
 107   </Event>
 108 
 109   <Event name="IntFlagChanged" category="Java Virtual Machine, Flag" label="Int Flag Changed" startTime="false">
 110     <Field type="string" name="name" label="Name" />
 111     <Field type="int" name="oldValue" label="Old Value" />
 112     <Field type="int" name="newValue" label="New Value" />
 113     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 114   </Event>
 115 
 116   <Event name="UnsignedIntFlagChanged" category="Java Virtual Machine, Flag" label="Unsigned Int Flag Changed" startTime="false">
 117     <Field type="string" name="name" label="Name" />
 118     <Field type="uint" name="oldValue" label="Old Value" />
 119     <Field type="uint" name="newValue" label="New Value" />
 120     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 121   </Event>
 122 
 123   <Event name="LongFlagChanged" category="Java Virtual Machine, Flag" label="Long Flag Changed" startTime="false">
 124     <Field type="string" name="name" label="Name" />
 125     <Field type="long" name="oldValue" label="Old Value" />
 126     <Field type="long" name="newValue" label="New Value" />
 127     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 128   </Event>
 129 
 130   <Event name="UnsignedLongFlagChanged" category="Java Virtual Machine, Flag" label="Unsigned Long Flag Changed" startTime="false">
 131     <Field type="string" name="name" label="Name" />
 132     <Field type="ulong" name="oldValue" label="Old Value" />
 133     <Field type="ulong" name="newValue" label="New Value" />
 134     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 135   </Event>
 136 
 137   <Event name="DoubleFlagChanged" category="Java Virtual Machine, Flag" label="Double Flag Changed" startTime="false">
 138     <Field type="string" name="name" label="Name" />
 139     <Field type="double" name="oldValue" label="Old Value" />
 140     <Field type="double" name="newValue" label="New Value" />
 141     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 142   </Event>
 143 
 144   <Event name="BooleanFlagChanged" category="Java Virtual Machine, Flag" label="Boolean Flag Changed" startTime="false">
 145     <Field type="string" name="name" label="Name" />
 146     <Field type="boolean" name="oldValue" label="Old Value" />
 147     <Field type="boolean" name="newValue" label="New Value" />
 148     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 149   </Event>
 150 
 151   <Event name="StringFlagChanged" category="Java Virtual Machine, Flag" label="String Flag Changed" startTime="false">
 152     <Field type="string" name="name" label="Name" />
 153     <Field type="string" name="oldValue" label="Old Value" />
 154     <Field type="string" name="newValue" label="New Value" />
 155     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 156   </Event>
 157 
 158   <Type name="VirtualSpace">
 159     <Field type="ulong" contentType="address" name="start" label="Start Address" description="Start address of the virtual space" />
 160     <Field type="ulong" contentType="address" name="committedEnd" label="Committed End Address" description="End address of the committed memory for the virtual space" />
 161     <Field type="ulong" contentType="bytes" name="committedSize" label="Committed Size" description="Size of the committed memory for the virtual space" />
 162     <Field type="ulong" contentType="address" name="reservedEnd" label="Reserved End Address" description="End address of the reserved memory for the virtual space" />
 163     <Field type="ulong" contentType="bytes" name="reservedSize" label="Reserved Size" description="Size of the reserved memory for the virtual space" />
 164   </Type>
 165 
 166   <Type name="ObjectSpace">
 167     <Field type="ulong" contentType="address" name="start" label="Start Address" description="Start address of the space" />
 168     <Field type="ulong" contentType="address" name="end" label="End Address" description="End address of the space" />
 169     <Field type="ulong" contentType="bytes" name="used" label="Used" description="Bytes allocated by objects in the space" />
 170     <Field type="ulong" contentType="bytes" name="size" label="Size" description="Size of the space" />
 171   </Type>
 172 
 173   <Event name="GCHeapSummary" category="Java Virtual Machine, GC, Heap" label="Heap Summary" startTime="false">
 174     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 175     <Field type="GCWhen" name="when" label="When" />
 176     <Field type="VirtualSpace" struct="true" name="heapSpace" label="Heap Space" />
 177     <Field type="ulong" contentType="bytes" name="heapUsed" label="Heap Used" description="Bytes allocated by objects in the heap" />
 178   </Event>
 179 
 180   <Type name="MetaspaceSizes">
 181     <Field type="ulong" contentType="bytes" name="committed" label="Committed" description="Committed memory for this space" />
 182     <Field type="ulong" contentType="bytes" name="used" label="Used" description="Bytes allocated by objects in the space" />
 183     <Field type="ulong" contentType="bytes" name="reserved" label="Reserved" description="Reserved memory for this space" />
 184   </Type>
 185 
 186   <Event name="MetaspaceSummary" category="Java Virtual Machine, GC, Heap" label="Metaspace Summary" startTime="false">
 187     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 188     <Field type="GCWhen" name="when" label="When" />
 189     <Field type="ulong" contentType="bytes" name="gcThreshold" label="GC Threshold" />
 190     <Field type="MetaspaceSizes" struct="true" name="metaspace" label="Total" />
 191     <Field type="MetaspaceSizes" struct="true" name="dataSpace" label="Data" />
 192     <Field type="MetaspaceSizes" struct="true" name="classSpace" label="Class" />
 193   </Event>
 194 
 195   <Event name="MetaspaceGCThreshold" category="Java Virtual Machine, GC, Metaspace" label="Metaspace GC Threshold" startTime="false">
 196     <Field type="ulong" contentType="bytes" name="oldValue" label="Old Value" />
 197     <Field type="ulong" contentType="bytes" name="newValue" label="New Value" />
 198     <Field type="GCThresholdUpdater" name="updater" label="Updater" />
 199   </Event>
 200 
 201   <Event name="MetaspaceAllocationFailure" category="Java Virtual Machine, GC, Metaspace" label="Metaspace Allocation Failure" startTime="false"
 202     stackTrace="true">
 203     <Field type="ClassLoader" name="classLoader" label="Class Loader" />
 204     <Field type="boolean" name="unsafeAnonymousClassLoader" label="Unsafe Anonymous Class Loader" />
 205     <Field type="ulong" contentType="bytes" name="size" label="Size" />
 206     <Field type="MetadataType" name="metadataType" label="Metadata Type" />
 207     <Field type="MetaspaceObjectType" name="metaspaceObjectType" label="Metaspace Object Type" />
 208   </Event>
 209 
 210   <Event name="MetaspaceOOM" category="Java Virtual Machine, GC, Metaspace" label="Metaspace Out of Memory" startTime="false" stackTrace="true">
 211     <Field type="ClassLoader" name="classLoader" label="Class Loader" />
 212     <Field type="boolean" name="unsafeAnonymousClassLoader" label="Unsafe Anonymous Class Loader" />
 213     <Field type="ulong" contentType="bytes" name="size" label="Size" />
 214     <Field type="MetadataType" name="metadataType" label="Metadata Type" />
 215     <Field type="MetaspaceObjectType" name="metaspaceObjectType" label="Metaspace Object Type" />
 216   </Event>
 217 
 218   <Event name="MetaspaceChunkFreeListSummary" category="Java Virtual Machine, GC, Metaspace" label="Metaspace Chunk Free List Summary" startTime="false">
 219     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 220     <Field type="GCWhen" name="when" label="When" />
 221     <Field type="MetadataType" name="metadataType" label="Metadata Type" />
 222     <Field type="ulong" name="specializedChunks" label="Specialized Chunks" />
 223     <Field type="ulong" contentType="bytes" name="specializedChunksTotalSize" label="Specialized Chunks Total Size" />
 224     <Field type="ulong" name="smallChunks" label="Small Chunks" />
 225     <Field type="ulong" contentType="bytes" name="smallChunksTotalSize" label="Small Chunks Total Size" />
 226     <Field type="ulong" name="mediumChunks" label="Medium Chunks" />
 227     <Field type="ulong" contentType="bytes" name="mediumChunksTotalSize" label="Medium Chunks Total Size" />
 228     <Field type="ulong" name="humongousChunks" label="Humongous Chunks" />
 229     <Field type="ulong" contentType="bytes" name="humongousChunksTotalSize" label="Humongous Chunks Total Size" />
 230   </Event>
 231 
 232   <Event name="PSHeapSummary" category="Java Virtual Machine, GC, Heap" label="Parallel Scavenge Heap Summary" startTime="false">
 233     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 234     <Field type="GCWhen" name="when" label="When" />
 235     <Field type="VirtualSpace" struct="true" name="oldSpace" label="Old Space" />
 236     <Field type="ObjectSpace" struct="true" name="oldObjectSpace" label="Old Object Space" />
 237     <Field type="VirtualSpace" struct="true" name="youngSpace" label="Young Space" />
 238     <Field type="ObjectSpace" struct="true" name="edenSpace" label="Eden Space" />
 239     <Field type="ObjectSpace" struct="true" name="fromSpace" label="From Space" />
 240     <Field type="ObjectSpace" struct="true" name="toSpace" label="To Space" />
 241   </Event>
 242 
 243   <Event name="G1HeapSummary" category="Java Virtual Machine, GC, Heap" label="G1 Heap Summary" startTime="false">
 244     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 245     <Field type="GCWhen" name="when" label="When" />
 246     <Field type="ulong" contentType="bytes" name="edenUsedSize" label="Eden Used Size" />
 247     <Field type="ulong" contentType="bytes" name="edenTotalSize" label="Eden Total Size" />
 248     <Field type="ulong" contentType="bytes" name="survivorUsedSize" label="Survivor Used Size" />
 249     <Field type="uint" name="numberOfRegions" label="Number of Regions" />
 250   </Event>
 251 
 252   <Event name="GarbageCollection" category="Java Virtual Machine, GC, Collector" label="Garbage Collection" description="Garbage collection performed by the JVM">
 253     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 254     <Field type="GCName" name="name" label="Name" description="The name of the Garbage Collector" />
 255     <Field type="GCCause" name="cause" label="Cause" description="The reason for triggering this Garbage Collection" />
 256     <Field type="Tickspan" name="sumOfPauses" label="Sum of Pauses" description="Sum of all the times in which Java execution was paused during the garbage collection" />
 257     <Field type="Tickspan" name="longestPause" label="Longest Pause" description="Longest individual pause during the garbage collection" />
 258   </Event>
 259 
 260   <Event name="ParallelOldGarbageCollection" category="Java Virtual Machine, GC, Collector" label="Parallel Old Garbage Collection"
 261     description="Extra information specific to Parallel Old Garbage Collections">
 262     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 263     <Field type="ulong" contentType="address" name="densePrefix" label="Dense Prefix" description="The address of the dense prefix, used when compacting" />
 264   </Event>
 265 
 266   <Event name="YoungGarbageCollection" category="Java Virtual Machine, GC, Collector" label="Young Garbage Collection" description="Extra information specific to Young Garbage Collections">
 267     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 268     <Field type="uint" name="tenuringThreshold" label="Tenuring Threshold" />
 269   </Event>
 270 
 271   <Event name="OldGarbageCollection" category="Java Virtual Machine, GC, Collector" label="Old Garbage Collection" description="Extra information specific to Old Garbage Collections">
 272     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 273   </Event>
 274 
 275   <Event name="G1GarbageCollection" category="Java Virtual Machine, GC, Collector" label="G1 Garbage Collection" description="Extra information specific to G1 Garbage Collections">
 276     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 277     <Field type="G1YCType" name="type" label="Type" />
 278   </Event>
 279 
 280   <Event name="G1MMU" category="Java Virtual Machine, GC, Detailed" label="G1 MMU Information" startTime="false">
 281     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 282     <Field type="long" contentType="millis" name="timeSlice" label="Time Slice" description="Time slice used to calculate MMU" />
 283     <Field type="long" contentType="millis" name="gcTime" label="GC Time" description="Time stopped because of GC during last time slice" />
 284     <Field type="long" contentType="millis" name="pauseTarget" label="Pause Target" description="Max time allowed to be spent on GC during last time slice" />
 285   </Event>
 286 
 287   <Event name="EvacuationInformation" category="Java Virtual Machine, GC, Detailed" label="Evacuation Information" startTime="false">
 288     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 289     <Field type="uint" name="cSetRegions" label="Collection Set Regions" />
 290     <Field type="ulong" contentType="bytes" name="cSetUsedBefore" label="Collection Set Before" description="Memory usage before GC in the collection set regions" />
 291     <Field type="ulong" contentType="bytes" name="cSetUsedAfter" label="Collection Set After" description="Memory usage after GC in the collection set regions" />
 292     <Field type="uint" name="allocationRegions" label="Allocation Regions" description="Regions chosen as allocation regions during evacuation (includes survivors and old space regions)" />
 293     <Field type="ulong" contentType="bytes" name="allocationRegionsUsedBefore" label="Allocation Regions Before" description="Memory usage before GC in allocation regions" />
 294     <Field type="ulong" contentType="bytes" name="allocationRegionsUsedAfter" label="Allocation Regions After" description="Memory usage after GC in allocation regions" />
 295     <Field type="ulong" contentType="bytes" name="bytesCopied" label="Bytes Copied" />
 296     <Field type="uint" name="regionsFreed" label="Regions Freed" />
 297   </Event>
 298 
 299   <Event name="GCReferenceStatistics" category="Java Virtual Machine, GC, Reference" label="GC Reference Statistics" startTime="false"
 300     description="Total count of processed references during GC">
 301     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 302     <Field type="ReferenceType" name="type" label="Type" />
 303     <Field type="ulong" name="count" label="Total Count" />
 304   </Event>
 305 
 306   <Type name="CopyFailed">
 307     <Field type="ulong" name="objectCount" label="Object Count" />
 308     <Field type="ulong" contentType="bytes" name="firstSize" label="First Failed Object Size" />
 309     <Field type="ulong" contentType="bytes" name="smallestSize" label="Smallest Failed Object Size" />
 310     <Field type="ulong" contentType="bytes" name="totalSize" label="Total Object Size" />
 311   </Type>
 312 
 313   <Event name="ObjectCountAfterGC" category="Java Virtual Machine, GC, Detailed" startTime="false" label="Object Count after GC">
 314     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 315     <Field type="Class" name="objectClass" label="Object Class" />
 316     <Field type="long" name="count" label="Count" />
 317     <Field type="ulong" contentType="bytes" name="totalSize" label="Total Size" />
 318   </Event>
 319 
 320   <Type name="G1EvacuationStatistics">
 321     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 322     <Field type="ulong" contentType="bytes" name="allocated" label="Allocated" description="Total memory allocated by PLABs" />
 323     <Field type="ulong" contentType="bytes" name="wasted" label="Wasted" description="Total memory wasted within PLABs due to alignment or refill" />
 324     <Field type="ulong" contentType="bytes" name="used" label="Used" description="Total memory occupied by objects within PLABs" />
 325     <Field type="ulong" contentType="bytes" name="undoWaste" label="Undo Wasted" description="Total memory wasted due to allocation undo within PLABs" />
 326     <Field type="ulong" contentType="bytes" name="regionEndWaste" label="Region End Wasted" description="Total memory wasted at the end of regions due to refill" />
 327     <Field type="uint" contentType="bytes" name="regionsRefilled" label="Region Refills" description="Total memory wasted at the end of regions due to refill" />
 328     <Field type="ulong" contentType="bytes" name="directAllocated" label="Allocated (direct)" description="Total memory allocated using direct allocation outside of PLABs" />
 329     <Field type="ulong" contentType="bytes" name="failureUsed" label="Used (failure)" description="Total memory occupied by objects in regions where evacuation failed" />
 330     <Field type="ulong" contentType="bytes" name="failureWaste" label="Wasted (failure)" description="Total memory left unused in regions where evacuation failed" />
 331   </Type>
 332 
 333   <Event name="G1EvacuationYoungStatistics" category="Java Virtual Machine, GC, Detailed" label="G1 Evacuation Statistics for Young" startTime="false"
 334     description="Memory related evacuation statistics during GC for the young generation">
 335     <Field type="G1EvacuationStatistics" struct="true" name="statistics" label="Evacuation Statistics" />
 336   </Event>
 337 
 338   <Event name="G1EvacuationOldStatistics" category="Java Virtual Machine, GC, Detailed" label="G1 Evacuation Memory Statistics for Old" startTime="false"
 339     description="Memory related evacuation statistics during GC for the old generation">
 340     <Field type="G1EvacuationStatistics" struct="true" name="statistics" label="Evacuation Statistics" />
 341   </Event>
 342 
 343   <Event name="G1BasicIHOP" category="Java Virtual Machine, GC, Detailed" label="G1 Basic IHOP Statistics" startTime="false"
 344     description="Basic statistics related to current IHOP calculation">
 345     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 346     <Field type="ulong" contentType="bytes" name="threshold" label="Current IHOP Threshold" description="Current IHOP threshold" />
 347     <Field type="float" contentType="percentage" name="thresholdPercentage" label="Current IHOP Threshold" description="Current IHOP threshold in percent of old generation" />
 348     <Field type="ulong" contentType="bytes" name="targetOccupancy" label="Target Occupancy" description="Target old generation occupancy to reach at the start of mixed GC" />
 349     <Field type="ulong" contentType="bytes" name="currentOccupancy" label="Current Occupancy" description="Current old generation occupancy" />
 350     <Field type="ulong" contentType="bytes" name="recentMutatorAllocationSize" label="Recent Mutator Allocation Size"
 351       description="Mutator allocation during mutator operation in the most recent interval" />
 352     <Field type="long" contentType="millis" name="recentMutatorDuration" label="Recent Mutator Duration" description="Time the mutator ran in the most recent interval" />
 353     <Field type="double" contentType="bytes-per-second" name="recentAllocationRate" label="Recent Allocation Rate" description="Allocation rate of the mutator in the most recent interval in bytes/second" />
 354     <Field type="long" contentType="millis" name="lastMarkingDuration" label="Last Marking Duration" description="Last time from the end of the last initial mark to the first mixed GC" />
 355   </Event>
 356 
 357   <Event name="G1AdaptiveIHOP" category="Java Virtual Machine, GC, Detailed" label="G1 Adaptive IHOP Statistics" startTime="false"
 358     description="Statistics related to current adaptive IHOP calculation">
 359     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 360     <Field type="ulong" contentType="bytes" name="threshold" label="Threshold" description="Current IHOP Threshold" />
 361     <Field type="float" contentType="percentage" name="thresholdPercentage" label="Threshold" description="Current IHOP threshold in percent of the internal target occupancy" />
 362     <Field type="ulong" contentType="bytes" name="ihopTargetOccupancy" label="IHOP Target Occupancy" description="Internal target old generation occupancy to reach at the start of mixed GC" />
 363     <Field type="ulong" contentType="bytes" name="currentOccupancy" label="Current Occupancy" description="Current old generation occupancy" />
 364     <Field type="ulong" contentType="bytes" name="additionalBufferSize" label="Additional Buffer" description="Additional buffer size" experimental="true" />
 365     <Field type="double" contentType="bytes-per-second" name="predictedAllocationRate" label="Predicted Allocation Rate" description="Current predicted allocation rate for the mutator in bytes/second" />
 366     <Field type="long" contentType="millis" name="predictedMarkingDuration" label="Predicted Marking Duration"
 367       description="Current predicted time from the end of the last initial mark to the first mixed GC" />
 368     <Field type="boolean" name="predictionActive" label="Prediction Active" description="Indicates whether the adaptive IHOP prediction is active" />
 369   </Event>
 370 
 371   <Event name="PromoteObjectInNewPLAB" category="Java Virtual Machine, GC, Detailed" label="Promotion in new PLAB"
 372     description="Object survived scavenge and was copied to a new Promotion Local Allocation Buffer (PLAB). Supported GCs are Parallel Scavange, G1 and CMS with Parallel New. Due to promotion being done in parallel an object might be reported multiple times as the GC threads race to copy all objects."
 373     thread="true" stackTrace="false" startTime="false">
 374     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" description="Identifier signifying GC during which the object was promoted" />
 375     <Field type="Class" name="objectClass" label="Object Class" description="Class of promoted object" />
 376     <Field type="ulong" contentType="bytes" name="objectSize" label="Object Size" description="Size of promoted object" />
 377     <Field type="uint" name="tenuringAge" label="Object Tenuring Age"
 378       description="Tenuring age of a surviving object before being copied. The tenuring age of an object is a value between 0-15 and is incremented each scavange the object survives. Newly allocated objects have tenuring age 0." />
 379     <Field type="boolean" name="tenured" label="Tenured" description="True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space" />
 380     <Field type="ulong" contentType="bytes" name="plabSize" label="PLAB Size" description="Size of the allocated PLAB to which the object was copied" />
 381   </Event>
 382 
 383   <Event name="PromoteObjectOutsidePLAB" category="Java Virtual Machine, GC, Detailed" label="Promotion outside PLAB"
 384     description="Object survived scavenge and was copied directly to the heap. Supported GCs are Parallel Scavange, G1 and CMS with Parallel New. Due to promotion being done in parallel an object might be reported multiple times as the GC threads race to copy all objects."
 385     thread="true" stackTrace="false" startTime="false">
 386     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" description="Identifier signifying GC during which the object was promoted" />
 387     <Field type="Class" name="objectClass" label="Object Class" description="Class of promoted object" />
 388     <Field type="ulong" contentType="bytes" name="objectSize" label="Object Size" description="Size of promoted object" />
 389     <Field type="uint" name="tenuringAge" label="Object Tenuring Age"
 390       description="Tenuring age of a surviving object before being copied. The tenuring age of an object is a value between 0-15 and is incremented each scavange the object survives. Newly allocated objects have tenuring age 0." />
 391     <Field type="boolean" name="tenured" label="Tenured" description="True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space" />
 392   </Event>
 393 
 394   <Event name="PromotionFailed" category="Java Virtual Machine, GC, Detailed" label="Promotion Failed" startTime="false" description="Promotion of an object failed">
 395     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 396     <Field type="CopyFailed" struct="true" name="promotionFailed" label="Promotion Failed Data" />
 397     <Field type="Thread" name="thread" label="Running thread" />
 398   </Event>
 399 
 400   <Event name="EvacuationFailed" category="Java Virtual Machine, GC, Detailed" label="Evacuation Failed" startTime="false" description="Evacuation of an object failed">
 401     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 402     <Field type="CopyFailed" struct="true" name="evacuationFailed" label="Evacuation Failed Data" />
 403   </Event>
 404 
 405   <Event name="ConcurrentModeFailure" category="Java Virtual Machine, GC, Detailed" label="Concurrent Mode Failure" startTime="false" description="Concurrent Mode failed">
 406     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 407   </Event>
 408 
 409   <Event name="GCPhasePause" category="Java Virtual Machine, GC, Phases" label="GC Phase Pause" thread="true">
 410     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 411     <Field type="string" name="name" label="Name" />
 412   </Event>
 413 
 414   <Event name="GCPhasePauseLevel1" category="Java Virtual Machine, GC, Phases" label="GC Phase Pause Level 1" thread="true">
 415     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 416     <Field type="string" name="name" label="Name" />
 417   </Event>
 418 
 419   <Event name="GCPhasePauseLevel2" category="Java Virtual Machine, GC, Phases" label="GC Phase Pause Level 2" thread="true">
 420     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 421     <Field type="string" name="name" label="Name" />
 422   </Event>
 423 
 424   <Event name="GCPhasePauseLevel3" category="Java Virtual Machine, GC, Phases" label="GC Phase Pause Level 3" thread="true">
 425     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 426     <Field type="string" name="name" label="Name" />
 427   </Event>
 428 
 429   <Event name="GCPhasePauseLevel4" category="Java Virtual Machine, GC, Phases" label="GC Phase Pause Level 4" thread="true">
 430     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 431     <Field type="string" name="name" label="Name" />
 432   </Event>
 433 
 434   <Event name="GCPhaseConcurrent" category="Java Virtual Machine, GC, Phases" label="GC Phase Concurrent" thread="true">
 435     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 436     <Field type="string" name="name" label="Name" />
 437   </Event>
 438 
 439   <Event name="GCPhaseParallel" category="Java Virtual Machine, GC, Phases" label="GC Phase Parallel"
 440          startTime="true" thread="true" description="GC phases for parallel workers">
 441     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId"/>
 442     <Field type="uint" name="gcWorkerId" label="GC Worker Identifier" />
 443     <Field type="string" name="name" label="Name" />
 444   </Event>
 445 
 446   <Event name="AllocationRequiringGC" category="Java Virtual Machine, GC, Detailed" label="Allocation Requiring GC" thread="true" stackTrace="true"
 447     startTime="false">
 448     <Field type="uint" name="gcId" label="Pending GC Identifier" relation="GcId" />
 449     <Field type="ulong" contentType="bytes" name="size" label="Allocation Size" />
 450   </Event>
 451 
 452   <Event name="TenuringDistribution" category="Java Virtual Machine, GC, Detailed" label="Tenuring Distribution" startTime="false">
 453     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 454     <Field type="uint" name="age" label="Age" />
 455     <Field type="ulong" contentType="bytes" name="size" label="Size" />
 456   </Event>
 457 
 458   <Event name="G1HeapRegionTypeChange" category="Java Virtual Machine, GC, Detailed" label="G1 Heap Region Type Change" description="Information about a G1 heap region type change"
 459     startTime="false">
 460     <Field type="uint" name="index" label="Index" />
 461     <Field type="G1HeapRegionType" name="from" label="From" />
 462     <Field type="G1HeapRegionType" name="to" label="To" />
 463     <Field type="ulong" contentType="address" name="start" label="Start" />
 464     <Field type="ulong" contentType="bytes" name="used" label="Used" />
 465   </Event>
 466 
 467   <Event name="Compilation" category="Java Virtual Machine, Compiler" label="Compilation" thread="true">
 468     <Field type="Method" name="method" label="Java Method" />
 469     <Field type="uint" name="compileId" label="Compilation Identifier" relation="CompileId" />
 470     <Field type="ushort" name="compileLevel" label="Compilation Level" />
 471     <Field type="boolean" name="succeded" label="Succeeded" />
 472     <Field type="boolean" name="isOsr" label="On Stack Replacement" />
 473     <Field type="ulong" contentType="bytes" name="codeSize" label="Compiled Code Size" />
 474     <Field type="ulong" contentType="bytes" name="inlinedBytes" label="Inlined Code Size" />
 475   </Event>
 476 
 477   <Event name="CompilerPhase" category="Java Virtual Machine, Compiler" label="Compiler Phase" thread="true" >
 478     <Field type="CompilerPhaseType" name="phase" label="Compile Phase" />
 479     <Field type="uint" name="compileId" label="Compilation Identifier" relation="CompileId" />
 480     <Field type="ushort" name="phaseLevel" label="Phase Level" />
 481   </Event>
 482 
 483   <Event name="CompilationFailure" category="Java Virtual Machine, Compiler" label="Compilation Failure" thread="true"  startTime="false">
 484     <Field type="string" name="failureMessage" label="Failure Message" />
 485     <Field type="uint" name="compileId" label="Compilation Identifier" relation="CompileId" />
 486   </Event>
 487 
 488   <Type name="CalleeMethod">
 489     <Field type="string" name="type" label="Class" />
 490     <Field type="string" name="name" label="Method Name" />
 491     <Field type="string" name="descriptor" label="Method Descriptor" />
 492   </Type>
 493 
 494   <Event name="CompilerInlining" category="Java Virtual Machine, Compiler, Optimization" label="Method Inlining" thread="true" startTime="false">
 495     <Field type="uint" name="compileId" label="Compilation Identifier" relation="CompileId" />
 496     <Field type="Method" name="caller" label="Caller Method" />
 497     <Field type="CalleeMethod" name="callee" struct="true" label="Callee Method" />
 498     <Field type="boolean" name="succeeded" label="Succeeded" />
 499     <Field type="string" name="message" label="Message" />
 500     <Field type="int" name="bci" label="Byte Code Index" />
 501   </Event>
 502 
 503   <Event name="SweepCodeCache" category="Java Virtual Machine, Code Sweeper" label="Sweep Code Cache" thread="true" >
 504     <Field type="int" name="sweepId" label="Sweep Identifier" relation="SweepId" />
 505     <Field type="uint" name="sweptCount" label="Methods Swept" />
 506     <Field type="uint" name="flushedCount" label="Methods Flushed" />
 507     <Field type="uint" name="zombifiedCount" label="Methods Zombified" />
 508   </Event>
 509 
 510   <Event name="CodeCacheFull" category="Java Virtual Machine, Code Cache" label="Code Cache Full" thread="true" startTime="false">
 511     <Field type="CodeBlobType" name="codeBlobType" label="Code Heap" />
 512     <Field type="ulong" contentType="address" name="startAddress" label="Start Address" />
 513     <Field type="ulong" contentType="address" name="commitedTopAddress" label="Commited Top" />
 514     <Field type="ulong" contentType="address" name="reservedTopAddress" label="Reserved Top" />
 515     <Field type="int" name="entryCount" label="Entries" />
 516     <Field type="int" name="methodCount" label="Methods" />
 517     <Field type="int" name="adaptorCount" label="Adaptors" />
 518     <Field type="ulong" contentType="bytes" name="unallocatedCapacity" label="Unallocated" />
 519     <Field type="int" name="fullCount" label="Full Count" />
 520   </Event>
 521 
 522   <Event name="SafepointBegin" category="Java Virtual Machine, Runtime, Safepoint" label="Safepoint Begin" description="Safepointing begin" thread="true">
 523     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
 524     <Field type="int" name="totalThreadCount" label="Total Threads" description="The total number of threads at the start of safe point" />
 525     <Field type="int" name="jniCriticalThreadCount" label="JNI Critical Threads" description="The number of threads in JNI critical sections" />
 526   </Event>
 527 
 528   <Event name="SafepointStateSynchronization" category="Java Virtual Machine, Runtime, Safepoint" label="Safepoint State Synchronization" description="Synchronize run state of threads"
 529     thread="true">
 530     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
 531     <Field type="int" name="initialThreadCount" label="Initial Threads" description="The number of threads running at the beginning of state check" />
 532     <Field type="int" name="runningThreadCount" label="Running Threads" description="The number of threads still running" />
 533     <Field type="int" name="iterations" label="Iterations" description="Number of state check iterations" />
 534   </Event>
 535 
 536   <Event name="SafepointCleanup" category="Java Virtual Machine, Runtime, Safepoint" label="Safepoint Cleanup" description="Safepointing begin running cleanup tasks"
 537     thread="true">
 538     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
 539   </Event>
 540 
 541   <Event name="SafepointCleanupTask" category="Java Virtual Machine, Runtime, Safepoint" label="Safepoint Cleanup Task" description="Safepointing begin running cleanup tasks"
 542     thread="true">
 543     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
 544     <Field type="string" name="name" label="Task Name" description="The task name" />
 545   </Event>
 546 
 547   <Event name="SafepointEnd" category="Java Virtual Machine, Runtime, Safepoint" label="Safepoint End" description="Safepointing end" thread="true">
 548     <Field type="ulong" name="safepointId" label="Safepoint Identifier" relation="SafepointId" />
 549   </Event>
 550 
 551   <Event name="ExecuteVMOperation" category="Java Virtual Machine, Runtime" label="VM Operation" description="Execution of a VM Operation" thread="true">
 552     <Field type="VMOperationType" name="operation" label="Operation" />
 553     <Field type="boolean" name="safepoint" label="At Safepoint" description="If the operation occured at a safepoint" />
 554     <Field type="boolean" name="blocking" label="Caller Blocked" description="If the calling thread was blocked until the operation was complete" />
 555     <Field type="Thread" name="caller" label="Caller" transition="from"
 556       description="Thread requesting operation. If non-blocking, will be set to 0 indicating thread is unknown" />
 557     <Field type="ulong" name="safepointId" label="Safepoint Identifier" description="The safepoint (if any) under which this operation was completed"
 558       relation="SafepointId" />
 559   </Event>
 560 
 561   <Event name="Shutdown" category="Java Virtual Machine, Runtime" label="JVM Shutdown" description="JVM shutting down" thread="true" stackTrace="true"
 562     startTime="false">
 563     <Field type="string" name="reason" label="Reason" description="Reason for JVM shutdown" />
 564   </Event>
 565 
 566   <Event name="ObjectAllocationInNewTLAB" category="Java Application" label="Allocation in new TLAB" description="Allocation in new Thread Local Allocation Buffer"
 567     thread="true" stackTrace="true" startTime="false">
 568     <Field type="Class" name="objectClass" label="Object Class" description="Class of allocated object" />
 569     <Field type="ulong" contentType="bytes" name="allocationSize" label="Allocation Size" />
 570     <Field type="ulong" contentType="bytes" name="tlabSize" label="TLAB Size" />
 571   </Event>
 572 
 573   <Event name="ObjectAllocationOutsideTLAB" category="Java Application" label="Allocation outside TLAB" description="Allocation outside Thread Local Allocation Buffers"
 574     thread="true" stackTrace="true" startTime="false">
 575     <Field type="Class" name="objectClass" label="Object Class" description="Class of allocated object" />
 576     <Field type="ulong" contentType="bytes" name="allocationSize" label="Allocation Size" />
 577   </Event>
 578 
 579   <Event name="OldObjectSample" category="Java Virtual Machine, Profiling" label="Old Object Sample" description="A potential memory leak" stackTrace="true" thread="true"
 580     startTime="false" cutoff="true">
 581     <Field type="Ticks" name="allocationTime" label="Allocation Time" />
 582     <Field type="Tickspan" name="objectAge" label="Object Age" />
 583     <Field type="ulong" contentType="bytes" name="lastKnownHeapUsage" label="Last Known Heap Usage" />
 584     <Field type="OldObject" name="object" label="Object" />
 585     <Field type="int" name="arrayElements" label="Array Elements" description="If the object is an array, the number of elements, or -1 if it is not an array" />
 586     <Field type="OldObjectGcRoot" name="root" label="GC Root" />
 587   </Event>
 588 
 589   <Event name="DumpReason" category="Flight Recorder" label="Recording Reason"
 590          description="Who requested the recording and why"
 591          startTime="false">
 592     <Field type="string" name="reason" label="Reason" description="Reason for writing recording data to disk" />
 593     <Field type="int" name="recordingId" label="Recording Id" description="Id of the recording that triggered the dump, or -1 if it was not related to a recording" />
 594   </Event>
 595 
 596   <Event name="DataLoss" category="Flight Recorder" label="Data Loss"
 597          description="Data could not be copied out from a buffer, typically because of contention"
 598          startTime="false">
 599     <Field type="ulong" contentType="bytes" name="amount" label="Amount" description="Amount lost data" />
 600     <Field type="ulong" contentType="bytes" name="total" label="Total" description="Total lost amount for thread" />
 601   </Event>
 602 
 603   <Event name="JVMInformation" category="Java Virtual Machine" label="JVM Information"
 604          description="Description of JVM and the Java application"
 605          period="endChunk">
 606     <Field type="string" name="jvmName" label="JVM Name" />
 607     <Field type="string" name="jvmVersion" label="JVM Version" />
 608     <Field type="string" name="jvmArguments" label="JVM Command Line Arguments" />
 609     <Field type="string" name="jvmFlags" label="JVM Settings File Arguments" />
 610     <Field type="string" name="javaArguments" label="Java Application Arguments" />
 611     <Field type="long" contentType="epochmillis" name="jvmStartTime" label="JVM Start Time" />
 612     <Field type="long" name="pid" label="Process Identifier" />
 613      </Event>
 614 
 615   <Event name="OSInformation" category="Operating System" label="OS Information" period="endChunk">
 616     <Field type="string" name="osVersion" label="OS Version" />
 617   </Event>
 618 
 619   <Event name="VirtualizationInformation" category="Operating System" label="Virtualization Information" period="endChunk">
 620     <Field type="string" name="name" label="Name" />
 621   </Event>
 622 
 623   <Event name="InitialSystemProperty" category="Java Virtual Machine" label="Initial System Property" description="System Property at JVM start" period="endChunk">
 624     <Field type="string" name="key" label="Key" />
 625     <Field type="string" name="value" label="Value" />
 626   </Event>
 627 
 628   <Event name="InitialEnvironmentVariable" category="Operating System" label="Initial Environment Variable" period="endChunk">
 629     <Field type="string" name="key" label="Key" />
 630     <Field type="string" name="value" label="Value" />
 631   </Event>
 632 
 633   <Event name="SystemProcess" category="Operating System" label="System Process" period="endChunk">
 634     <Field type="string" name="pid" label="Process Identifier" />
 635     <Field type="string" name="commandLine" label="Command Line" />
 636   </Event>
 637 
 638   <Event name="CPUInformation" category="Operating System, Processor" label="CPU Information" period="endChunk">
 639     <Field type="string" name="cpu" label="Type" />
 640     <Field type="string" name="description" label="Description" />
 641     <Field type="uint" name="sockets" label="Sockets" />
 642     <Field type="uint" name="cores" label="Cores" />
 643     <Field type="uint" name="hwThreads" label="Hardware Threads" />
 644   </Event>
 645 
 646   <Event name="CPUTimeStampCounter" category="Operating System, Processor" label="CPU Time Stamp Counter" period="endChunk">
 647     <Field type="boolean" name="fastTimeEnabled" label="Fast Time" />
 648     <Field type="boolean" name="fastTimeAutoEnabled" label="Trusted Platform" />
 649     <Field type="long" contentType="hertz" name="osFrequency" label="OS Frequency" />
 650     <Field type="long" contentType="hertz" name="fastTimeFrequency" label="Fast Time Frequency" />
 651   </Event>
 652 
 653   <Event name="CPULoad" category="Operating System, Processor" label="CPU Load" description="OS CPU Load" period="everyChunk">
 654     <Field type="float" contentType="percentage" name="jvmUser" label="JVM User" />
 655     <Field type="float" contentType="percentage" name="jvmSystem" label="JVM System" />
 656     <Field type="float" contentType="percentage" name="machineTotal" label="Machine Total" />
 657   </Event>
 658 
 659   <Event name="ThreadCPULoad" category="Operating System, Processor" label="Thread CPU Load" period="everyChunk" thread="true">
 660     <Field type="float" contentType="percentage" name="user" label="User Mode CPU Load" description="User mode thread CPU load" />
 661     <Field type="float" contentType="percentage" name="system" label="System Mode CPU Load" description="System mode thread CPU load" />
 662   </Event>
 663 
 664   <Event name="ThreadContextSwitchRate" category="Operating System, Processor" label="Thread Context Switch Rate" period="everyChunk">
 665     <Field type="float" contentType="hertz" name="switchRate" label="Switch Rate" description="Number of context switches per second" />
 666   </Event>
 667 
 668   <Event name="NetworkUtilization" category="Operating System, Network" label="Network Utilization" period="everyChunk">
 669     <Field type="NetworkInterfaceName" name="networkInterface" label="Network Interface" description="Network Interface Name"/>
 670     <Field type="long" contentType="bits-per-second" name="readRate" label="Read Rate" description="Number of incoming bits per second"/>
 671     <Field type="long" contentType="bits-per-second" name="writeRate" label="Write Rate" description="Number of outgoing bits per second"/>
 672   </Event>
 673 
 674   <Event name="JavaThreadStatistics" category="Java Application, Statistics" label="Java Thread Statistics" period="everyChunk">
 675     <Field type="long" name="activeCount" label="Active Threads" description="Number of live active threads including both daemon and non-daemon threads" />
 676     <Field type="long" name="daemonCount" label="Daemon Threads" description="Number of live daemon threads" />
 677     <Field type="long" name="accumulatedCount" label="Accumulated Threads" description="Number of threads created and also started since JVM start" />
 678     <Field type="long" name="peakCount" label="Peak Threads" description="Peak live thread count since JVM start or when peak count was reset" />
 679   </Event>
 680 
 681   <Event name="ClassLoadingStatistics" category="Java Application, Statistics" label="Class Loading Statistics" period="everyChunk">
 682     <Field type="long" name="loadedClassCount" label="Loaded Class Count" description="Number of classes loaded since JVM start" />
 683     <Field type="long" name="unloadedClassCount" label="Unloaded Class Count" description="Number of classes unloaded since JVM start" />
 684   </Event>
 685 
 686   <Event name="ClassLoaderStatistics" category="Java Application, Statistics" label="Class Loader Statistics" period="everyChunk">
 687     <Field type="ClassLoader" name="classLoader" label="Class Loader" />
 688     <Field type="ClassLoader" name="parentClassLoader" label="Parent Class Loader" />
 689     <Field type="ulong" contentType="address" name="classLoaderData" label="ClassLoaderData Pointer" description="Pointer to the ClassLoaderData structure in the JVM" />
 690     <Field type="long" name="classCount" label="Classes" description="Number of loaded classes" />
 691     <Field type="ulong" contentType="bytes" name="chunkSize" label="Total Chunk Size" description="Total size of all allocated metaspace chunks (each chunk has several blocks)" />
 692     <Field type="ulong" contentType="bytes" name="blockSize" label="Total Block Size" description="Total size of all allocated metaspace blocks (each chunk has several blocks)" />
 693     <Field type="long" name="unsafeAnonymousClassCount" label="Unsafe Anonymous Classes" description="Number of loaded classes to support invokedynamic" />
 694     <Field type="ulong" contentType="bytes" name="unsafeAnonymousChunkSize" label="Total Unsafe Anonymous Classes Chunk Size"
 695       description="Total size of all allocated metaspace chunks for unsafe anonymous classes (each chunk has several blocks)" />
 696     <Field type="ulong" contentType="bytes" name="unsafeAnonymousBlockSize" label="Total Unsafe Anonymous Classes Block Size"
 697       description="Total size of all allocated metaspace blocks for unsafe anonymous classes (each chunk has several blocks)" />
 698   </Event>
 699 
 700   <Event name="SymbolTableStatistics" category="Java Virtual Machine, Runtime, Tables" label="Symbol Table Statistics" period="everyChunk">
 701     <Field type="ulong" name="bucketCount" label="Bucket Count" description="Number of buckets" />
 702     <Field type="ulong" name="entryCount" label="Entry Count" description="Number of all entries" />
 703     <Field type="ulong" contentType="bytes" name="totalFootprint" label="Total Footprint" description="Total memory footprint (the table itself plus all of the entries)" />
 704     <Field type="ulong" name="bucketCountMaximum" label="Maximum Bucket Count" description="The maximum bucket length (entries in a single bucket)" />
 705     <Field type="float" name="bucketCountAverage" label="Average Bucket Count" description="The average bucket length" />
 706     <Field type="float" name="bucketCountVariance" label="Bucket Count Variance" description="How far bucket lengths are spread out from their average value" />
 707     <Field type="float" name="bucketCountStandardDeviation" label="Bucket Count Standard Deviation" description="How far bucket lengths are spread out from their mean (expected) value" />
 708     <Field type="float" name="insertionRate" label="Insertion Rate" description="How many items were added since last event (per second)" />
 709     <Field type="float" name="removalRate" label="Removal Rate" description="How many items were removed since last event (per second)" />
 710   </Event>
 711 
 712   <Event name="StringTableStatistics" category="Java Virtual Machine, Runtime, Tables" label="String Table Statistics" period="everyChunk">
 713     <Field type="ulong" name="bucketCount" label="Bucket Count" description="Number of buckets" />
 714     <Field type="ulong" name="entryCount" label="Entry Count" description="Number of all entries" />
 715     <Field type="ulong" contentType="bytes" name="totalFootprint" label="Total Footprint" description="Total memory footprint (the table itself plus all of the entries)" />
 716     <Field type="ulong" name="bucketCountMaximum" label="Maximum Bucket Count" description="The maximum bucket length (entries in a single bucket)" />
 717     <Field type="float" name="bucketCountAverage" label="Average Bucket Count" description="The average bucket length" />
 718     <Field type="float" name="bucketCountVariance" label="Bucket Count Variance" description="How far bucket lengths are spread out from their average value" />
 719     <Field type="float" name="bucketCountStandardDeviation" label="Bucket Count Standard Deviation" description="How far bucket lengths are spread out from their mean (expected) value" />
 720     <Field type="float" name="insertionRate" label="Insertion Rate" description="How many items were added since last event (per second)" />
 721     <Field type="float" name="removalRate" label="Removal Rate" description="How many items were removed since last event (per second)" />
 722   </Event>
 723 
 724   <Event name="PlaceholderTableStatistics" category="Java Virtual Machine, Runtime, Tables" label="Placeholder Table Statistics" period="everyChunk">
 725     <Field type="ulong" name="bucketCount" label="Bucket Count" description="Number of buckets" />
 726     <Field type="ulong" name="entryCount" label="Entry Count" description="Number of all entries" />
 727     <Field type="ulong" contentType="bytes" name="totalFootprint" label="Total Footprint" description="Total memory footprint (the table itself plus all of the entries)" />
 728     <Field type="ulong" name="bucketCountMaximum" label="Maximum Bucket Count" description="The maximum bucket length (entries in a single bucket)" />
 729     <Field type="float" name="bucketCountAverage" label="Average Bucket Count" description="The average bucket length" />
 730     <Field type="float" name="bucketCountVariance" label="Bucket Count Variance" description="How far bucket lengths are spread out from their average value" />
 731     <Field type="float" name="bucketCountStandardDeviation" label="Bucket Count Standard Deviation" description="How far bucket lengths are spread out from their mean (expected) value" />
 732     <Field type="float" name="insertionRate" label="Insertion Rate" description="How many items were added since last event (per second)" />
 733     <Field type="float" name="removalRate" label="Removal Rate" description="How many items were removed since last event (per second)" />
 734   </Event>
 735 
 736   <Event name="LoaderConstraintsTableStatistics" category="Java Virtual Machine, Runtime, Tables" label="Loader Constraints Table Statistics" period="everyChunk">
 737     <Field type="ulong" name="bucketCount" label="Bucket Count" />
 738     <Field type="ulong" name="entryCount" label="Entry Count" description="Number of all entries" />
 739     <Field type="ulong" contentType="bytes" name="totalFootprint" label="Total Footprint" description="Total memory footprint (the table itself plus all of the entries)" />
 740     <Field type="ulong" name="bucketCountMaximum" label="Maximum Bucket Count" description="The maximum bucket length (entries in a single bucket)" />
 741     <Field type="float" name="bucketCountAverage" label="Average Bucket Count" description="The average bucket length" />
 742     <Field type="float" name="bucketCountVariance" label="Bucket Count Variance" description="How far bucket lengths are spread out from their average value" />
 743     <Field type="float" name="bucketCountStandardDeviation" label="Bucket Count Standard Deviation" description="How far bucket lengths are spread out from their mean (expected) value" />
 744     <Field type="float" name="insertionRate" label="Insertion Rate" description="How many items were added since last event (per second)" />
 745     <Field type="float" name="removalRate" label="Removal Rate" description="How many items were removed since last event (per second)" />
 746   </Event>
 747 
 748   <Event name="ProtectionDomainCacheTableStatistics" category="Java Virtual Machine, Runtime, Tables" label="Protection Domain Cache Table Statistics" period="everyChunk">
 749     <Field type="ulong" name="bucketCount" label="Bucket Count" description="Number of buckets" />
 750     <Field type="ulong" name="entryCount" label="Entry Count" description="Number of all entries" />
 751     <Field type="ulong" contentType="bytes" name="totalFootprint" label="Total Footprint" description="Total memory footprint (the table itself plus all of the entries)" />
 752     <Field type="ulong" name="bucketCountMaximum" label="Maximum Bucket Count" description="The maximum bucket length (entries in a single bucket)" />
 753     <Field type="float" name="bucketCountAverage" label="Average Bucket Count" description="The average bucket length" />
 754     <Field type="float" name="bucketCountVariance" label="Bucket Count Variance" description="How far bucket lengths are spread out from their average value" />
 755     <Field type="float" name="bucketCountStandardDeviation" label="Bucket Count Standard Deviation" description="How far bucket lengths are spread out from their mean (expected) value" />
 756     <Field type="float" name="insertionRate" label="Insertion Rate" description="How many items were added since last event (per second)" />
 757     <Field type="float" name="removalRate" label="Removal Rate" description="How many items were removed since last event (per second)" />
 758   </Event>
 759 
 760   <Event name="ThreadAllocationStatistics" category="Java Application, Statistics" label="Thread Allocation Statistics" period="everyChunk">
 761     <Field type="ulong" contentType="bytes" name="allocated" label="Allocated" description="Approximate number of bytes allocated since thread start" />
 762     <Field type="Thread" name="thread" label="Thread" />
 763   </Event>
 764 
 765   <Event name="PhysicalMemory" category="Operating System, Memory" label="Physical Memory" description="OS Physical Memory" period="everyChunk">
 766     <Field type="ulong" contentType="bytes" name="totalSize" label="Total Size" description="Total amount of physical memory available to OS" />
 767     <Field type="ulong" contentType="bytes" name="usedSize" label="Used Size" description="Total amount of physical memory in use" />
 768   </Event>
 769 
 770   <Event name="ExecutionSample" category="Java Virtual Machine, Profiling" label="Method Profiling Sample" description="Snapshot of a threads state"
 771     period="everyChunk">
 772     <Field type="Thread" name="sampledThread" label="Thread" />
 773     <Field type="StackTrace" name="stackTrace" label="Stack Trace" />
 774     <Field type="ThreadState" name="state" label="Thread State" />
 775   </Event>
 776 
 777   <Event name="NativeMethodSample" category="Java Virtual Machine, Profiling" label="Method Profiling Sample Native" description="Snapshot of a threads state when in native"
 778     period="everyChunk">
 779     <Field type="Thread" name="sampledThread" label="Thread" />
 780     <Field type="StackTrace" name="stackTrace" label="Stack Trace" />
 781     <Field type="ThreadState" name="state" label="Thread State" />
 782   </Event>
 783 
 784   <Event name="ThreadDump" category="Java Virtual Machine, Runtime" label="Thread Dump" period="everyChunk">
 785     <Field type="string" name="result" label="Thread Dump" />
 786   </Event>
 787 
 788   <Event name="NativeLibrary" category="Java Virtual Machine, Runtime" label="Native Library" period="everyChunk">
 789     <Field type="string" name="name" label="Name" />
 790     <Field type="ulong" contentType="address" name="baseAddress" label="Base Address" description="Starting address of the module" />
 791     <Field type="ulong" contentType="address" name="topAddress" label="Top Address" description="Ending address of the module" />
 792   </Event>
 793 
 794   <Event name="ModuleRequire" category="Java Virtual Machine, Runtime, Modules" label="Module Require" thread="false" period="everyChunk"
 795     description="A directed edge representing a dependency">
 796     <Field type="Module" name="source" label="Source Module" />
 797     <Field type="Module" name="requiredModule" label="Required Module" />
 798   </Event>
 799 
 800   <Event name="ModuleExport" category="Java Virtual Machine, Runtime, Modules" label="Module Export" thread="false" period="everyChunk">
 801     <Field type="Package" name="exportedPackage" label="Exported Package" />
 802     <Field type="Module" name="targetModule" label="Target Module"
 803       description="Module to which the package is qualifiedly exported. If null or N/A, the package is unqualifiedly exported" />
 804   </Event>
 805 
 806   <Event name="CompilerStatistics" category="Java Virtual Machine, Compiler" label="Compiler Statistics" thread="false" period="everyChunk" startTime="false">
 807     <Field type="int" name="compileCount" label="Compiled Methods" />
 808     <Field type="int" name="bailoutCount" label="Bailouts" />
 809     <Field type="int" name="invalidatedCount" label="Invalidated Compilations" />
 810     <Field type="int" name="osrCompileCount" label="OSR Compilations" />
 811     <Field type="int" name="standardCompileCount" label="Standard Compilations" />
 812     <Field type="ulong" contentType="bytes" name="osrBytesCompiled" label="OSR Bytes Compiled" />
 813     <Field type="ulong" contentType="bytes" name="standardBytesCompiled" label="Standard Bytes Compiled" />
 814     <Field type="ulong" contentType="bytes" name="nmethodsSize" label="Compilation Resulting Size" />
 815     <Field type="ulong" contentType="bytes" name="nmethodCodeSize" label="Compilation Resulting Code Size" />
 816     <Field type="long" contentType="millis" name="peakTimeSpent" label="Peak Time" />
 817     <Field type="long" contentType="millis" name="totalTimeSpent" label="Total time" />
 818   </Event>
 819 
 820   <Event name="CompilerConfiguration" category="Java Virtual Machine, Compiler" label="Compiler Configuration" thread="false" period="endChunk" startTime="false">
 821     <Field type="int" name="threadCount" label="Thread Count" />
 822     <Field type="boolean" name="tieredCompilation" label="Tiered Compilation" />
 823   </Event>
 824 
 825   <Event name="CodeCacheStatistics" category="Java Virtual Machine, Code Cache" label="Code Cache Statistics" thread="false" period="everyChunk" startTime="false">
 826     <Field type="CodeBlobType" name="codeBlobType" label="Code Heap" />
 827     <Field type="ulong" contentType="address" name="startAddress" label="Start Address" />
 828     <Field type="ulong" contentType="address" name="reservedTopAddress" label="Reserved Top" />
 829     <Field type="int" name="entryCount" label="Entries" />
 830     <Field type="int" name="methodCount" label="Methods" />
 831     <Field type="int" name="adaptorCount" label="Adaptors" />
 832     <Field type="ulong" contentType="bytes" name="unallocatedCapacity" label="Unallocated" />
 833     <Field type="int" name="fullCount" label="Full Count" />
 834   </Event>
 835 
 836   <Event name="CodeCacheConfiguration" category="Java Virtual Machine, Code Cache" label="Code Cache Configuration" thread="false" period="endChunk" startTime="false">
 837     <Field type="ulong" contentType="bytes" name="initialSize" label="Initial Size" />
 838     <Field type="ulong" contentType="bytes" name="reservedSize" label="Reserved Size" />
 839     <Field type="ulong" contentType="bytes" name="nonNMethodSize" label="Non-nmethod Size" />
 840     <Field type="ulong" contentType="bytes" name="profiledSize" label="Profiled Size" />
 841     <Field type="ulong" contentType="bytes" name="nonProfiledSize" label="Non-profiled Size" />
 842     <Field type="ulong" contentType="bytes" name="expansionSize" label="Expansion size" />
 843     <Field type="ulong" contentType="bytes" name="minBlockLength" label="Minimum Block Length" />
 844     <Field type="ulong" contentType="address" name="startAddress" label="Start Address" />
 845     <Field type="ulong" contentType="address" name="reservedTopAddress" label="Reserved Top" />
 846   </Event>
 847 
 848   <Event name="CodeSweeperStatistics" category="Java Virtual Machine, Code Sweeper" label="Code Sweeper Statistics" thread="false" period="everyChunk" startTime="false">
 849     <Field type="int" name="sweepCount" label="Sweeps" />
 850     <Field type="int" name="methodReclaimedCount" label="Methods Reclaimed" />
 851     <Field type="Tickspan" name="totalSweepTime" label="Time Spent Sweeping" />
 852     <Field type="Tickspan" name="peakFractionTime" label="Peak Time Fraction Sweep" />
 853     <Field type="Tickspan" name="peakSweepTime" label="Peak Time Full Sweep" />
 854   </Event>
 855 
 856   <Event name="CodeSweeperConfiguration" category="Java Virtual Machine, Code Sweeper" label="Code Sweeper Configuration" thread="false" period="endChunk" startTime="false">
 857     <Field type="boolean" name="sweeperEnabled" label="Code Sweeper Enabled" />
 858     <Field type="boolean" name="flushingEnabled" label="Code Cache Flushing Enabled" />
 859   </Event>
 860 
 861   <Event name="IntFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Int Flag">
 862     <Field type="string" name="name" label="Name" />
 863     <Field type="int" name="value" label="Value" />
 864     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 865   </Event>
 866 
 867   <Event name="UnsignedIntFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Unsigned Int Flag">
 868     <Field type="string" name="name" label="Name" />
 869     <Field type="uint" name="value" label="Value" />
 870     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 871   </Event>
 872 
 873   <Event name="LongFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Long Flag">
 874     <Field type="string" name="name" label="Name" />
 875     <Field type="long" name="value" label="Value" />
 876     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 877   </Event>
 878 
 879   <Event name="UnsignedLongFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Unsigned Long Flag">
 880     <Field type="string" name="name" label="Name" />
 881     <Field type="ulong" name="value" label="Value" />
 882     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 883   </Event>
 884 
 885   <Event name="DoubleFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Double Flag">
 886     <Field type="string" name="name" label="Name" />
 887     <Field type="double" name="value" label="Value" />
 888     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 889   </Event>
 890 
 891   <Event name="BooleanFlag" category="Java Virtual Machine, Flag" period="endChunk" label="Boolean Flag">
 892     <Field type="string" name="name" label="Name" />
 893     <Field type="boolean" name="value" label="Value" />
 894     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 895   </Event>
 896 
 897   <Event name="StringFlag" category="Java Virtual Machine, Flag" period="endChunk" label="String Flag">
 898     <Field type="string" name="name" label="Name" />
 899     <Field type="string" name="value" label="Value" />
 900     <Field type="FlagValueOrigin" name="origin" label="Origin" />
 901   </Event>
 902 
 903   <Event name="ObjectCount" category="Java Virtual Machine, GC, Detailed" startTime="false" period="everyChunk" label="Object Count">
 904     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId" />
 905     <Field type="Class" name="objectClass" label="Object Class" />
 906     <Field type="long" name="count" label="Count" />
 907     <Field type="ulong" contentType="bytes" name="totalSize" label="Total Size" />
 908   </Event>
 909 
 910   <Event name="G1HeapRegionInformation" category="Java Virtual Machine, GC, Detailed" label="G1 Heap Region Information" description="Information about a specific heap region in the G1 GC"
 911     period="everyChunk">
 912     <Field type="uint" name="index" label="Index" />
 913     <Field type="G1HeapRegionType" name="type" label="Type" />
 914     <Field type="ulong" contentType="address" name="start" label="Start" />
 915     <Field type="ulong" contentType="bytes" name="used" label="Used" />
 916   </Event>
 917 
 918   <Event name="GCConfiguration" category="Java Virtual Machine, GC, Configuration" label="GC Configuration" description="The configuration of the garbage collector"
 919     period="endChunk">
 920     <Field type="GCName" name="youngCollector" label="Young Garbage Collector" description="The garbage collector used for the young generation" />
 921     <Field type="GCName" name="oldCollector" label="Old Garbage Collector" description="The garbage collector used for the old generation" />
 922     <Field type="uint" name="parallelGCThreads" label="Parallel GC Threads" description="Number of parallel threads to use for garbage collection" />
 923     <Field type="uint" name="concurrentGCThreads" label="Concurrent GC Threads" description="Number of concurrent threads to use for garbage collection" />
 924     <Field type="boolean" name="usesDynamicGCThreads" label="Uses Dynamic GC Threads" description="Whether a dynamic number of GC threads are used or not" />
 925     <Field type="boolean" name="isExplicitGCConcurrent" label="Concurrent Explicit GC" description="Whether System.gc() is concurrent or not" />
 926     <Field type="boolean" name="isExplicitGCDisabled" label="Disabled Explicit GC" description="Whether System.gc() will cause a garbage collection or not" />
 927     <Field type="long" contentType="millis" name="pauseTarget" label="Pause Target" description="Target for GC pauses" />
 928     <Field type="uint" name="gcTimeRatio" label="GC Time Ratio" description="Target for runtime vs garbage collection time" />
 929   </Event>
 930 
 931   <Event name="GCSurvivorConfiguration" category="Java Virtual Machine, GC, Configuration" label="GC Survivor Configuration"
 932     description="The configuration of the survivors of garbage collection" period="endChunk">
 933     <Field type="ubyte" name="maxTenuringThreshold" label="Maximum Tenuring Threshold" description="Upper limit for the age of how old objects to keep in the survivor area" />
 934     <Field type="ubyte" name="initialTenuringThreshold" label="Initial Tenuring Threshold" description="Initial age limit for how old objects to keep in survivor area" />
 935   </Event>
 936 
 937   <Event name="GCTLABConfiguration" category="Java Virtual Machine, GC, Configuration" label="TLAB Configuration"
 938     description="The configuration of the Thread Local Allocation Buffers (TLABs)" period="endChunk">
 939     <Field type="boolean" name="usesTLABs" label="TLABs Used" description="If Thread Local Allocation Buffers (TLABs) are in use" />
 940     <Field type="ulong" contentType="bytes" name="minTLABSize" label="Minimum TLAB Size" />
 941     <Field type="ulong" contentType="bytes" name="tlabRefillWasteLimit" label="TLAB Refill Waste Limit" />
 942   </Event>
 943 
 944   <Event name="GCHeapConfiguration" category="Java Virtual Machine, GC, Configuration" label="GC Heap Configuration" description="The configuration of the garbage collected heap"
 945     period="endChunk">
 946     <Field type="ulong" contentType="bytes" name="minSize" label="Minimum Heap Size" />
 947     <Field type="ulong" contentType="bytes" name="maxSize" label="Maximum Heap Size" />
 948     <Field type="ulong" contentType="bytes" name="initialSize" label="Initial Heap Size" />
 949     <Field type="boolean" name="usesCompressedOops" label="If Compressed Oops Are Used" description="If compressed Oops (Ordinary Object Pointers) are enabled" />
 950     <Field type="NarrowOopMode" name="compressedOopsMode" label="Compressed Oops Mode" description="The kind of compressed oops being used" />
 951     <Field type="ulong" contentType="bytes" name="objectAlignment" label="Object Alignment" description="Object alignment (in bytes) on the heap" />
 952     <Field type="ubyte" name="heapAddressBits" label="Heap Address Size" description="Heap Address Size (in bits)" />
 953   </Event>
 954 
 955   <Event name="YoungGenerationConfiguration" category="Java Virtual Machine, GC, Configuration" label="Young Generation Configuration"
 956     description="The configuration of the young generation of the garbage collected heap" period="endChunk">
 957     <Field type="ulong" contentType="bytes" name="minSize" label="Minimum Young Generation Size" />
 958     <Field type="ulong" contentType="bytes" name="maxSize" label="Maximum Young Generation Size" />
 959     <Field type="uint" name="newRatio" label="New Ratio" description="The size of the young generation relative to the tenured generation" />
 960   </Event>
 961 
 962   <Event name="ZPageAllocation" category="Java Virtual Machine, GC, Detailed" label="ZPage Allocation" description="Allocation of a ZPage" thread="true" stackTrace="false" experimental="true">
 963      <Field type="ulong" contentType="bytes" name="pageSize" label="Page Size" />
 964      <Field type="ulong" contentType="bytes" name="usedAfter" label="Used After" />
 965      <Field type="ulong" contentType="bytes" name="freeAfter" label="Free After" />
 966      <Field type="ulong" contentType="bytes" name="inCacheAfter" label="In Cache After" />
 967      <Field type="boolean" name="nonBlocking" label="Non-blocking" />
 968      <Field type="boolean" name="noReserve" label="No Reserve" />
 969   </Event>
 970 
 971   <Event name="ZThreadPhase" category="Java Virtual Machine, GC, Detailed" label="ZGC Thread Phase" thread="true" experimental="true">
 972     <Field type="uint" name="gcId" label="GC Identifier" relation="GcId"/>
 973     <Field type="string" name="name" label="Name" />
 974   </Event>
 975 
 976   <Event name="ZStatisticsCounter" category="Java Virtual Machine, GC, Detailed" label="Z Statistics Counter" thread="true" experimental="true" >
 977     <Field type="ZStatisticsCounterType" name="id" label="Id" />
 978     <Field type="ulong" name="increment" label="Increment" />
 979     <Field type="ulong" name="value" label="Value" />
 980   </Event>
 981 
 982   <Event name="ZStatisticsSampler" category="Java Virtual Machine, GC, Detailed" label="Z Statistics Sampler" thread="true" experimental="true">
 983     <Field type="ZStatisticsSamplerType" name="id" label="Id" />
 984     <Field type="ulong" name="value" label="Value" />
 985   </Event>
 986 
 987   <Event name="ShenandoahHeapRegionStateChange" category="Java Virtual Machine, GC, Detailed" label="Shenandoah Heap Region State Change" description="Information about a Shenandoah heap region state change"
 988     startTime="false">
 989     <Field type="uint" name="index" label="Index" />
 990     <Field type="ShenandoahHeapRegionState" name="from" label="From" />
 991     <Field type="ShenandoahHeapRegionState" name="to" label="To" />
 992     <Field type="ulong" contentType="address" name="start" label="Start" />
 993     <Field type="ulong" contentType="bytes" name="used" label="Used" />
 994   </Event>
 995 
 996   <Event name="ShenandoahHeapRegionInformation" category="Java Virtual Machine, GC, Detailed" label="Shenandoah Heap Region Information" description="Information about a specific heap region in the Shenandoah GC"
 997     period="everyChunk">
 998     <Field type="uint" name="index" label="Index" />
 999     <Field type="ShenandoahHeapRegionState" name="state" label="State" />
1000     <Field type="ulong" contentType="address" name="start" label="Start" />
1001     <Field type="ulong" contentType="bytes" name="used" label="Used" />
1002   </Event>
1003 
1004   <Type name="ShenandoahHeapRegionState" label="Shenandoah Heap Region State">
1005     <Field type="string" name="state" label="State" />
1006   </Type>
1007 
1008   <Event name="Flush" category="Flight Recorder" label="Flush" thread="false" experimental="true">
1009     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1010     <Field type="ulong" name="elements" label="Elements Written" />
1011     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1012   </Event>
1013 
1014   <Event name="FlushStorage" category="Flight Recorder" label="Flush Storage" thread="false" experimental="true">
1015     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1016     <Field type="ulong" name="elements" label="Elements Written" />
1017     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1018   </Event>
1019 
1020   <Event name="FlushStacktrace" category="Flight Recorder" label="Flush Stacktrace" thread="false" experimental="true">
1021     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1022     <Field type="ulong" name="elements" label="Elements Written" />
1023     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1024   </Event>
1025 
1026   <Event name="FlushStringPool" category="Flight Recorder" label="Flush String Pool" thread="false" experimental="true">
1027     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1028     <Field type="ulong" name="elements" label="Elements Written" />
1029     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1030   </Event>
1031 
1032   <Event name="FlushMetadata" category="Flight Recorder" label="Flush Metadata" thread="false" experimental="true">
1033     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1034     <Field type="ulong" name="elements" label="Elements Written" />
1035     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1036   </Event>
1037 
1038   <Event name="FlushTypeSet" category="Flight Recorder" label="Flush Type Set" thread="false" experimental="true">
1039     <Field type="ulong" name="flushId" label="Flush Identifier" relation="FlushId" />
1040     <Field type="ulong" name="elements" label="Elements Written" />
1041     <Field type="ulong" contentType="bytes" name="size" label="Size Written" />
1042   </Event>
1043 
1044   <Type name="ZStatisticsCounterType" label="Z Statistics Counter">
1045     <Field type="string" name="counter" label="Counter" />
1046   </Type>
1047 
1048   <Type name="ZStatisticsSamplerType" label="Z Statistics Sampler">
1049     <Field type="string" name="sampler" label="Sampler" />
1050   </Type>
1051 
1052   <Type name="NetworkInterfaceName" label="Network Interface">
1053     <Field type="string" name="networkInterface" label="Network Interface" description="Network Interface Name" />
1054   </Type>
1055 
1056   <Type name="Thread" label="Thread">
1057     <Field type="string" name="osName" label="OS Thread Name" />
1058     <Field type="long" name="osThreadId" label="OS Thread Id" />
1059     <Field type="string" name="javaName" label="Java Thread Name" />
1060     <Field type="long" name="javaThreadId" label="Java Thread Id" />
1061     <Field type="ThreadGroup" name="group" label="Java Thread Group" />
1062   </Type>
1063 
1064   <Type name="ThreadGroup" label="Thread Group">
1065     <Field type="ThreadGroup" name="parent" label="Parent" />
1066     <Field type="string" name="name" label="Name" />
1067   </Type>
1068 
1069   <Type name="Class" label="Java Class">
1070     <Field type="ClassLoader" name="classLoader" label="Class Loader" />
1071     <Field type="Symbol" name="name" label="Name" />
1072     <Field type="Package" name="package" label="Package" />
1073     <Field type="int" name="modifiers" label="Access Modifiers" />
1074   </Type>
1075 
1076   <Type name="ClassLoader" label="Java Class Loader">
1077     <Field type="Class" name="type" label="Type" />
1078     <Field type="Symbol" name="name" label="Name" />
1079   </Type>
1080 
1081   <Type name="Method" label="Java Method">
1082     <Field type="Class" name="type" label="Type" />
1083     <Field type="Symbol" name="name" label="Name" />
1084     <Field type="Symbol" name="descriptor" label="Descriptor" />
1085     <Field type="int" name="modifiers" label="Access Modifiers" />
1086     <Field type="boolean" name="hidden" label="Hidden" />
1087   </Type>
1088 
1089   <Type name="Symbol" label="Symbol">
1090     <Field type="string" name="string" label="String" />
1091   </Type>
1092 
1093   <Type name="ThreadState" label="Java Thread State">
1094     <Field type="string" name="name" label="Name" />
1095   </Type>
1096 
1097   <Type name="GCName" label="GC Name">
1098     <Field type="string" name="name" label="Name" />
1099   </Type>
1100 
1101   <Type name="GCCause" label="GC Cause">
1102     <Field type="string" name="cause" label="Cause" />
1103   </Type>
1104 
1105   <Type name="GCWhen" label="GC When">
1106     <Field type="string" name="when" label="When" />
1107   </Type>
1108 
1109   <Type name="G1HeapRegionType" label="G1 Heap Region Type">
1110     <Field type="string" name="type" label="Type" />
1111   </Type>
1112 
1113   <Type name="G1YCType" label="G1 YC Type">
1114     <Field type="string" name="type" label="Type" />
1115   </Type>
1116 
1117   <Type name="GCThresholdUpdater" label="GC Threshold Updater">
1118     <Field type="string" name="updater" label="Updater" />
1119   </Type>
1120 
1121   <Type name="ReferenceType" label="Reference Type">
1122     <Field type="string" name="type" label="Type" />
1123   </Type>
1124 
1125   <Type name="MetadataType" label="Metadata Type">
1126     <Field type="string" name="type" label="Type" />
1127   </Type>
1128 
1129   <Type name="MetaspaceObjectType" label="Metaspace Object Type">
1130     <Field type="string" name="type" label="Type" />
1131   </Type>
1132 
1133   <Type name="NarrowOopMode" label="Narrow Oop Mode">
1134     <Field type="string" name="mode" label="Mode" />
1135   </Type>
1136 
1137   <Type name="VMOperationType" label="VM Operation Type">
1138     <Field type="string" name="type" label="Type" />
1139   </Type>
1140 
1141   <Type name="CompilerPhaseType" label="Compiler Phase Type">
1142     <Field type="string" name="phase" label="Phase" />
1143   </Type>
1144 
1145   <Type name="FlagValueOrigin" label="Flag Value Origin">
1146     <Field type="string" name="origin" label="Origin" />
1147   </Type>
1148 
1149   <Type name="CodeBlobType" label="Code Blob Type">
1150     <Field type="string" name="type" label="Type" />
1151   </Type>
1152 
1153   <Type name="InflateCause" label="Inflation Cause">
1154     <Field type="string" name="cause" label="Cause" />
1155   </Type>
1156 
1157   <Type name="Module" label="Module">
1158     <Field type="Symbol" name="name" label="Name" />
1159     <Field type="Symbol" name="version" label="Version" />
1160     <Field type="Symbol" name="location" label="Location" />
1161     <Field type="ClassLoader" name="classLoader" label="Class Loader" />
1162   </Type>
1163 
1164   <Type name="Package" label="Package">
1165     <Field type="Symbol" name="name" label="Name" />
1166     <Field type="Module" name="module" label="Module" />
1167     <Field type="boolean" name="exported" label="Exported" />
1168   </Type>
1169 
1170   <Type name="StackTrace" label="Stacktrace">
1171     <Field type="boolean" name="truncated" label="Truncated" />
1172     <Field type="StackFrame" array="true" struct="true" name="frames" label="Stack Frames" />
1173   </Type>
1174 
1175   <Type name="FrameType" label="Frame type">
1176     <Field type="string" name="description" label="Description" />
1177   </Type>
1178 
1179   <Type name="OldObjectRootSystem" label="GC Root System">
1180     <Field type="string" name="system" label="System" />
1181   </Type>
1182 
1183   <Type name="OldObjectRootType" label="GC Root Type">
1184     <Field type="string" name="type" label="Type" />
1185   </Type>
1186 
1187   <Type name="OldObjectGcRoot" label="GC Root">
1188     <Field type="string" name="description" label="Root Description" description="Root information" />
1189     <Field type="OldObjectRootSystem" name="system" label="System" description="The subsystem of origin for the root" />
1190     <Field type="OldObjectRootType" name="type" label="Type" description="The root type" />
1191   </Type>
1192 
1193   <Type name="OldObjectArray" label="Old Object Array">
1194     <Field type="int" name="size" label="Array Size" description="Size of array" />
1195     <Field type="int" name="index" label="Index" description="Index in the array" />
1196   </Type>
1197 
1198   <Type name="OldObjectField" label="Old Object Field">
1199     <Field type="string" name="name" label="Field" description="Name of field" />
1200     <Field type="short" name="modifiers" label="Field Modifiers" description="Field modifiers" />
1201   </Type>
1202 
1203   <Type name="OldObject" label="Old Object">
1204     <Field type="ulong" contentType="address" name="address" label="Memory Address" />
1205     <Field type="Class" name="type" label="Java Class" />
1206     <Field type="string" name="description" label="Object Description" description="Object description" />
1207     <Field type="Reference" name="referrer" label="Referrer Object" description="Object referencing this object" />
1208   </Type>
1209 
1210   <Type name="Reference" label="Reference">
1211     <Field type="OldObjectArray" name="array" label="Array Information" description="Array or null if it is not an array" />
1212     <Field type="OldObjectField" name="field" label="Field Information" description="Field or null if it is an array" />
1213     <Field type="OldObject" name="object" label="Object" description="Object holder for this reference" />
1214     <Field type="int" name="skip" label="Skip Value" description="The object is this many hops away" />
1215   </Type>
1216 
1217   <Type name="StackFrame">
1218     <Field type="Method" name="method" label="Java Method" />
1219     <Field type="int" name="lineNumber" label="Line Number" />
1220     <Field type="int" name="bytecodeIndex" label="Bytecode Index" />
1221     <Field type="FrameType" name="type" label="Frame Type" />
1222   </Type>
1223 
1224   <Type name="ChunkHeader" label="Chunk Header">
1225     <Field type="byte" array="true" name="payload" label="Payload" />
1226   </Type>
1227 
1228   <Relation name="JavaMonitorAddress"/>
1229   <Relation name="SafepointId"/>
1230   <Relation name="GcId"/>
1231   <Relation name="CompileId" />
1232   <Relation name="SweepId"/>
1233   <Relation name="FlushId"/>
1234 
1235   <XmlType name="Package" parameterType="const PackageEntry*" fieldType="const PackageEntry*"/>
1236   <XmlType name="Class" javaType="java.lang.Class" parameterType="const Klass*" fieldType="const Klass*"/>
1237   <XmlType name="Module"  parameterType="const ModuleEntry*" fieldType="const ModuleEntry*"/>
1238   <XmlType name="ClassLoader" parameterType="const ClassLoaderData*" fieldType="const ClassLoaderData*"/>
1239   <XmlType name="Method" parameterType="const Method*" fieldType="const Method*"/>
1240   <XmlType name="Thread" javaType="java.lang.Thread" parameterType="u8" fieldType="u8"/>
1241   <XmlType name="Tickspan" contentType="tickspan" javaType="long" parameterType="const Tickspan&amp;" fieldType="Tickspan"/>
1242   <XmlType name="Ticks" contentType="tickstamp" javaType="long" parameterType="const Ticks&amp;" fieldType="Ticks"/>
1243   <XmlType name="ulong" javaType="long" unsigned="true" parameterType="u8" fieldType="u8"/>
1244   <XmlType name="uint" javaType="int" unsigned="true" parameterType="unsigned" fieldType="unsigned"/>
1245   <XmlType name="ushort" javaType="short" unsigned="true" parameterType="u2" fieldType="u2"/>
1246   <XmlType name="ubyte" javaType="byte" unsigned="true" parameterType="u1" fieldType="u1"/>
1247   <XmlType name="long" javaType="long" parameterType="s8" fieldType="s8"/>
1248   <XmlType name="int" javaType="int" parameterType="s4" fieldType="s4"/>
1249   <XmlType name="short" javaType="short" parameterType="s2" fieldType="s2"/>
1250   <XmlType name="byte" javaType="byte"  parameterType="s1" fieldType="s1"/>
1251   <XmlType name="double" javaType="double" parameterType="double" fieldType="double"/>
1252   <XmlType name="float" javaType="float"  parameterType="float" fieldType="float"/>
1253   <XmlType name="boolean" javaType="boolean" parameterType="bool" fieldType="bool"/>
1254   <XmlType name="char" javaType="char" parameterType="char" fieldType="char"/>
1255   <XmlType name="string" javaType="java.lang.String" parameterType="const char*" fieldType="const char*"/>
1256 
1257   <XmlContentType name="bytes" annotation="jdk.jfr.DataAmount(BYTES)" />
1258   <XmlContentType name="tickstamp" annotation="jdk.jfr.Timestamp(TICKS)" />
1259   <XmlContentType name="epochmillis" annotation="jdk.jfr.Timestamp(MILLISECONDS_SINCE_EPOCH)" />
1260   <XmlContentType name="tickspan" annotation="jdk.jfr.Timespan(TICKS)" />
1261   <XmlContentType name="address" annotation="jdk.jfr.MemoryAddress" />
1262   <XmlContentType name="percentage" annotation="jdk.jfr.Percentage" />
1263   <XmlContentType name="millis" annotation="jdk.jfr.Timespan(MILLISECONDS)" />
1264   <XmlContentType name="nanos" annotation="jdk.jfr.Timespan(NANOSECONDS)" />
1265   <XmlContentType name="hertz" annotation="jdk.jfr.Frequency" />
1266   <XmlContentType name="bytes-per-second" annotation="jdk.jfr.DataAmount(BYTES), jdk.jfr.Frequency" />
1267   <XmlContentType name="bits-per-second" annotation="jdk.jfr.DataAmount(BITS), jdk.jfr.Frequency" />
1268 
1269 </Metadata>