1 <?xml version="1.0" encoding="utf-8"?>
   2 <!--
   3  Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
   4  DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5 
   6  This code is free software; you can redistribute it and/or modify it
   7  under the terms of the GNU General Public License version 2 only, as
   8  published by the Free Software Foundation.
   9 
  10  This code is distributed in the hope that it will be useful, but WITHOUT
  11  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  version 2 for more details (a copy is included in the LICENSE file that
  14  accompanied this code).
  15 
  16  You should have received a copy of the GNU General Public License version
  17  2 along with this work; if not, write to the Free Software Foundation,
  18  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19 
  20  Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  or visit www.oracle.com if you need additional information or have any
  22  questions.
  23 
  24 -->
  25 
  26 
  27 <!DOCTYPE events SYSTEM "trace.dtd">
  28 
  29 <events>
  30 
  31 <!--
  32 
  33 Events in the JVM are by default timed (it's more common)
  34 Perhaps a little strange. Might change.
  35 
  36 EVENTS
  37 
  38 Declard with the 'event' tag.
  39 
  40 <value fields> can be one or more of
  41    value            - a simple primitive or constant type value
  42    structvalue      - value is a sub-struct. This type must be previously defined
  43                       with 'struct'
  44 All these require you to declare type, field and label of the field. They also accept
  45 an optional description of the field. If the meaning of the field is not obvious
  46 from the label you should provide a description. If an event however is not actually
  47 meant for end-users, you should probably _not_ write descriptions at all, since you
  48 might just add more concepts the user has no notion of/interest in.
  49 
  50 Events should be modeled after what conceptual process you are expressing, _NOT_
  51 from whatever data structures you might use inside the JVM for expressing a process.
  52 
  53 
  54 STRUCT
  55 
  56 Declared with the 'struct' tag.
  57 
  58 Declares a structure type that can be used in other events.
  59 
  60 -->
  61 
  62   <event id="ThreadStart" path="java/thread_start" label="Java Thread Start"
  63          has_thread="true" is_instant="true">
  64     <value type="THREAD" field="thread" label="Java Thread"/>
  65   </event>
  66 
  67   <event id="ThreadEnd" path="java/thread_end" label="Java Thread End"
  68          has_thread="true" is_instant="true">
  69     <value type="THREAD" field="thread" label="Java Thread"/>
  70   </event>
  71 
  72   <event id="ThreadSleep" path="java/thread_sleep" label="Java Thread Sleep"
  73           has_thread="true" has_stacktrace="true" is_instant="false">
  74     <value type="MILLIS" field="time" label="Sleep Time"/>
  75   </event>
  76 
  77   <event id="ThreadPark" path="java/thread_park" label="Java Thread Park"
  78           has_thread="true" has_stacktrace="true" is_instant="false">
  79     <value type="CLASS" field="parkedClass" label="Class Parked On"/>
  80     <value type="MILLIS" field="timeout" label="Park Timeout"/>
  81     <value type="ADDRESS" field="address" label="Address of Object Parked" relation="JavaMonitorAddress"/>
  82   </event>
  83 
  84   <event id="JavaMonitorEnter" path="java/monitor_enter" label="Java Monitor Blocked"
  85           has_thread="true" has_stacktrace="true" is_instant="false">
  86     <value type="CLASS" field="monitorClass" label="Monitor Class"/>
  87     <value type="THREAD" field="previousOwner" label="Previous Monitor Owner"/>
  88     <value type="ADDRESS" field="address" label="Monitor Address" relation="JavaMonitorAddress"/>
  89   </event>
  90 
  91   <event id="JavaMonitorWait" path="java/monitor_wait" label="Java Monitor Wait" description="Waiting on a Java monitor"
  92           has_thread="true" has_stacktrace="true" is_instant="false">
  93     <value type="CLASS" field="monitorClass" label="Monitor Class" description="Class of object waited on"/>
  94     <value type="THREAD" field="notifier" label="Notifier Thread" description="Notifying Thread"/>
  95     <value type="MILLIS" field="timeout" label="Timeout" description="Maximum wait time"/>
  96     <value type="BOOLEAN" field="timedOut" label="Timed Out" description="Wait has been timed out"/>
  97     <value type="ADDRESS" field="address" label="Monitor Address" description="Address of object waited on" relation="JavaMonitorAddress"/>
  98   </event>
  99 
 100   <event id="JavaMonitorInflate" path="java/monitor_inflate" label="Java Monitor Inflated"
 101          has_thread="true" has_stacktrace="true" is_instant="false">
 102     <value type="CLASS" field="monitorClass" label="Monitor Class"/>
 103     <value type="ADDRESS" field="address" label="Monitor Address" relation="JavaMonitorAddress"/>
 104     <value type="INFLATECAUSE" field="cause" label="Monitor Inflation Cause" description="Cause of inflation"/>
 105   </event>
 106 
 107   <event id="ReservedStackActivation" path="vm/runtime/reserved_stack_activation" label="Reserved Stack Activation"
 108          description="Activation of Reserved Stack Area caused by stack overflow with ReservedStackAccess annotated method in call stack"
 109          has_thread="true" has_stacktrace="true" is_instant="true">
 110       <value type="METHOD" field="method" label="Java Method"/>
 111   </event>
 112 
 113   <event id="ClassLoad" path="vm/class/load" label="Class Load"
 114          has_thread="true" has_stacktrace="true" is_instant="false">
 115     <value type="CLASS" field="loadedClass" label="Loaded Class"/>
 116     <value type="CLASSLOADER" field="definingClassLoader" label="Defining Class Loader"/>
 117     <value type="CLASSLOADER" field="initiatingClassLoader" label="Initiating Class Loader"/>
 118   </event>
 119 
 120   <event id="ClassDefine" path="vm/class/define" label="Class Define"
 121          has_thread="true" has_stacktrace="true" is_instant="true">
 122     <value type="CLASS" field="definedClass" label="Defined Class"/>
 123     <value type="CLASSLOADER" field="definingClassLoader" label="Defining Class Loader"/>
 124   </event>
 125 
 126   <event id="ClassUnload" path="vm/class/unload" label="Class Unload"
 127          has_thread="true" is_instant="true">
 128     <value type="CLASS" field="unloadedClass" label="Unloaded Class"/>
 129     <value type="CLASSLOADER" field="definingClassLoader" label="Defining Class Loader"/>
 130   </event>
 131 
 132   <event id="IntFlagChanged" path="vm/flag/int_changed" label="Int Flag Changed"
 133          is_instant="true">
 134     <value type="STRING" field="name" label="Name" />
 135     <value type="INTEGER" field="oldValue" label="Old Value" />
 136     <value type="INTEGER" field="newValue" label="New Value" />
 137     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 138   </event>
 139 
 140   <event id="UnsignedIntFlagChanged" path="vm/flag/uint_changed" label="Unsigned Int Flag Changed"
 141          is_instant="true">
 142     <value type="STRING" field="name" label="Name" />
 143     <value type="UINT" field="oldValue" label="Old Value" />
 144     <value type="UINT" field="newValue" label="New Value" />
 145     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 146   </event>
 147 
 148   <event id="LongFlagChanged" path="vm/flag/long_changed" label="Long Flag Changed"
 149          is_instant="true">
 150     <value type="STRING" field="name" label="Name" />
 151     <value type="LONG" field="oldValue" label="Old Value" />
 152     <value type="LONG" field="newValue" label="New Value" />
 153     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 154   </event>
 155 
 156   <event id="UnsignedLongFlagChanged" path="vm/flag/ulong_changed" label="Unsigned Long Flag Changed"
 157          is_instant="true">
 158     <value type="STRING" field="name" label="Name" />
 159     <value type="ULONG" field="oldValue" label="Old Value" />
 160     <value type="ULONG" field="newValue" label="New Value" />
 161     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 162   </event>
 163 
 164   <event id="DoubleFlagChanged" path="vm/flag/double_changed" label="Double Flag Changed"
 165          is_instant="true">
 166     <value type="STRING" field="name" label="Name" />
 167     <value type="DOUBLE" field="oldValue" label="Old Value" />
 168     <value type="DOUBLE" field="newValue" label="New Value" />
 169     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 170   </event>
 171 
 172   <event id="BooleanFlagChanged" path="vm/flag/boolean_changed" label="Boolean Flag Changed"
 173          is_instant="true">
 174     <value type="STRING" field="name" label="Name" />
 175     <value type="BOOLEAN" field="oldValue" label="Old Value" />
 176     <value type="BOOLEAN" field="newValue" label="New Value" />
 177     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 178   </event>
 179 
 180   <event id="StringFlagChanged" path="vm/flag/string_changed" label="String Flag Changed"
 181          is_instant="true">
 182     <value type="STRING" field="name" label="Name" />
 183     <value type="STRING" field="oldValue" label="Old Value" />
 184     <value type="STRING" field="newValue" label="New Value" />
 185     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 186   </event>
 187 
 188   <struct id="VirtualSpace">
 189     <value type="ADDRESS" field="start" label="Start Address" description="Start address of the virtual space" />
 190     <value type="ADDRESS" field="committedEnd" label="Committed End Address" description="End address of the committed memory for the virtual space" />
 191     <value type="BYTES64" field="committedSize" label="Committed Size" description="Size of the committed memory for the virtual space" />
 192     <value type="ADDRESS" field="reservedEnd" label="Reserved End Address" description="End address of the reserved memory for the virtual space" />
 193     <value type="BYTES64" field="reservedSize" label="Reserved Size" description="Size of the reserved memory for the virtual space" />
 194   </struct>
 195 
 196   <struct id="ObjectSpace">
 197     <value type="ADDRESS" field="start" label="Start Address" description="Start address of the space" />
 198     <value type="ADDRESS" field="end" label="End Address" description="End address of the space" />
 199     <value type="BYTES64" field="used" label="Used" description="Bytes allocated by objects in the space" />
 200     <value type="BYTES64" field="size" label="Size" description="Size of the space" />
 201   </struct>
 202 
 203   <event id="GCHeapSummary" path="vm/gc/heap/summary" label="Heap Summary" is_instant="true">
 204     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 205     <value type="GCWHEN" field="when" label="When" />
 206     <structvalue type="VirtualSpace" field="heapSpace" label="Heap Space"/>
 207     <value type="BYTES64" field="heapUsed" label="Heap Used" description="Bytes allocated by objects in the heap"/>
 208   </event>
 209 
 210   <struct id="MetaspaceSizes">
 211     <value type="BYTES64" field="committed" label="Committed" description="Committed memory for this space" />
 212     <value type="BYTES64" field="used" label="Used" description="Bytes allocated by objects in the space" />
 213     <value type="BYTES64" field="reserved" label="Reserved" description="Reserved memory for this space" />
 214   </struct>
 215 
 216   <event id="MetaspaceSummary" path="vm/gc/heap/metaspace_summary" label="Metaspace Summary" is_instant="true">
 217     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 218     <value type="GCWHEN" field="when" label="When" />
 219     <value type="BYTES64" field="gcThreshold" label="GC Threshold" />
 220     <structvalue type="MetaspaceSizes" field="metaspace" label="Total"/>
 221     <structvalue type="MetaspaceSizes" field="dataSpace" label="Data"/>
 222     <structvalue type="MetaspaceSizes" field="classSpace" label="Class"/>
 223   </event>
 224 
 225   <event id="MetaspaceGCThreshold" path="vm/gc/metaspace/gc_threshold" label="Metaspace GC Threshold" is_instant="true">
 226     <value type="BYTES64" field="oldValue" label="Old Value" />
 227     <value type="BYTES64" field="newValue" label="New Value" />
 228     <value type="GCTHRESHOLDUPDATER" field="updater" label="Updater" />
 229   </event>
 230 
 231   <event id="MetaspaceAllocationFailure" path="vm/gc/metaspace/allocation_failure" label="Metaspace Allocation Failure" is_instant="true" has_stacktrace="true">
 232     <value type="CLASSLOADER" field="classLoader" label="Class Loader" />
 233     <value type="BOOLEAN" field="anonymousClassLoader" label="Anonymous Class Loader" />
 234     <value type="BYTES64" field="size" label="Size" />
 235     <value type="METADATATYPE" field="metadataType" label="Metadata Type" />
 236     <value type="METASPACEOBJTYPE" field="metaspaceObjectType" label="Metaspace Object Type" />
 237   </event>
 238 
 239   <event id="MetaspaceOOM" path="vm/gc/metaspace/out_of_memory" label="Metaspace Out of Memory" is_instant="true" has_stacktrace="true">
 240     <value type="CLASSLOADER" field="classLoader" label="Class Loader" />
 241     <value type="BOOLEAN" field="anonymousClassLoader" label="Anonymous Class Loader" />
 242     <value type="BYTES64" field="size" label="Size" />
 243     <value type="METADATATYPE" field="metadataType" label="Metadata Type" />
 244     <value type="METASPACEOBJTYPE" field="metaspaceObjectType" label="Metaspace Object Type" />
 245   </event>
 246 
 247   <event id="MetaspaceChunkFreeListSummary" path="vm/gc/metaspace/chunk_free_list_summary" label="Metaspace Chunk Free List Summary" is_instant="true">
 248     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 249     <value type="GCWHEN" field="when" label="When" />
 250     <value type="METADATATYPE" field="metadataType" label="Metadata Type" />
 251     <value type="ULONG" field="specializedChunks" label="Specialized Chunks" />
 252     <value type="BYTES64" field="specializedChunksTotalSize" label="Specialized Chunks Total Size" />
 253     <value type="ULONG" field="smallChunks" label="Small Chunks" />
 254     <value type="BYTES64" field="smallChunksTotalSize" label="Small Chunks Total Size" />
 255     <value type="ULONG" field="mediumChunks" label="Medium Chunks" />
 256     <value type="BYTES64" field="mediumChunksTotalSize" label="Medium Chunks Total Size" />
 257     <value type="ULONG" field="humongousChunks" label="Humongous Chunks" />
 258     <value type="BYTES64" field="humongousChunksTotalSize" label="Humongous Chunks Total Size" />
 259   </event>
 260 
 261   <event id="PSHeapSummary" path="vm/gc/heap/ps_summary" label="Parallel Scavenge Heap Summary" is_instant="true">
 262     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 263     <value type="GCWHEN" field="when" label="When" />
 264 
 265     <structvalue type="VirtualSpace" field="oldSpace" label="Old Space"/>
 266     <structvalue type="ObjectSpace" field="oldObjectSpace" label="Old Object Space"/>
 267 
 268     <structvalue type="VirtualSpace" field="youngSpace" label="Young Space"/>
 269     <structvalue type="ObjectSpace" field="edenSpace" label="Eden Space"/>
 270     <structvalue type="ObjectSpace" field="fromSpace" label="From Space"/>
 271     <structvalue type="ObjectSpace" field="toSpace" label="To Space"/>
 272   </event>
 273 
 274   <event id="G1HeapSummary" path="vm/gc/heap/g1_summary" label="G1 Heap Summary" is_instant="true">
 275     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 276     <value type="GCWHEN" field="when" label="When" />
 277 
 278     <value type="BYTES64" field="edenUsedSize" label="Eden Used Size" />
 279     <value type="BYTES64" field="edenTotalSize" label="Eden Total Size" />
 280     <value type="BYTES64" field="survivorUsedSize" label="Survivor Used Size" />
 281     <value type="UINT" field="numberOfRegions" label="Number of Regions" />
 282   </event>
 283 
 284   <event id="GarbageCollection" path="vm/gc/collector/garbage_collection" label="Garbage Collection"
 285          description="Garbage collection performed by the JVM">
 286     <value type="UINT" field="gcId"  label="GC Identifier" relation="GcId" />
 287     <value type="GCNAME" field="name" label="Name" description="The name of the Garbage Collector" />
 288     <value type="GCCAUSE" field="cause" label="Cause" description="The reason for triggering this Garbage Collection" />
 289     <value type="TICKSPAN" field="sumOfPauses" label="Sum of Pauses" description="Sum of all the times in which Java execution was paused during the garbage collection" />
 290     <value type="TICKSPAN" field="longestPause" label="Longest Pause" description="Longest individual pause during the garbage collection" />
 291   </event>
 292 
 293   <event id="ParallelOldGarbageCollection" path="vm/gc/collector/parold_garbage_collection" label="Parallel Old Garbage Collection"
 294          description="Extra information specific to Parallel Old Garbage Collections">
 295     <value type="UINT" field="gcId"  label="GC Identifier" relation="GcId" />
 296     <value type="ADDRESS" field="densePrefix" label="Dense Prefix" description="The address of the dense prefix, used when compacting" />
 297   </event>
 298 
 299   <event id="YoungGarbageCollection" path="vm/gc/collector/young_garbage_collection" label="Young Garbage Collection"
 300          description="Extra information specific to Young Garbage Collections">
 301     <value type="UINT" field="gcId"  label="GC Identifier" relation="GcId" />
 302     <value type="UINT" field="tenuringThreshold" label="Tenuring Threshold" />
 303   </event>
 304 
 305   <event id="OldGarbageCollection" path="vm/gc/collector/old_garbage_collection" label="Old Garbage Collection"
 306          description="Extra information specific to Old Garbage Collections">
 307     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 308   </event>
 309 
 310   <event id="G1GarbageCollection" path="vm/gc/collector/g1_garbage_collection" label="G1 Garbage Collection"
 311          description="Extra information specific to G1 Garbage Collections">
 312     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 313     <value type="G1YCTYPE" field="type" label="Type" />
 314   </event>
 315 
 316   <event id="G1MMU" path="vm/gc/detailed/g1_mmu_info" label="G1 MMU Information" is_instant="true">
 317     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 318     <value type="MILLIS" field="timeSlice" label="Time Slice" description="Time slice used to calculate MMU"/>
 319     <value type="MILLIS" field="gcTime" label="GC Time" description="Time stopped because of GC during last time slice"/>
 320     <value type="MILLIS" field="pauseTarget" label="Pause Target" description="Max time allowed to be spent on GC during last time slice"/>
 321   </event>
 322 
 323   <event id="EvacuationInformation" path="vm/gc/detailed/evacuation_info" label="Evacuation Information" is_instant="true">
 324     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 325     <value type="UINT" field="cSetRegions" label="Collection Set Regions"/>
 326     <value type="BYTES64" field="cSetUsedBefore" label="Collection Set Before" description="Memory usage before GC in the collection set regions"/>
 327     <value type="BYTES64" field="cSetUsedAfter" label="Collection Set After" description="Memory usage after GC in the collection set regions"/>
 328     <value type="UINT" field="allocationRegions" label="Allocation Regions" description="Regions chosen as allocation regions during evacuation (includes survivors and old space regions)"/>
 329     <value type="BYTES64" field="allocationRegionsUsedBefore" label="Allocation Regions Before" description="Memory usage before GC in allocation regions"/>
 330     <value type="BYTES64" field="allocationRegionsUsedAfter" label="Allocation Regions After" description="Memory usage after GC in allocation regions"/>
 331     <value type="BYTES64" field="bytesCopied" label="Bytes Copied"/>
 332     <value type="UINT" field="regionsFreed" label="Regions Freed"/>
 333   </event>
 334 
 335   <event id="GCReferenceStatistics" path="vm/gc/reference/statistics"
 336          label="GC Reference Statistics" is_instant="true"
 337          description="Total count of processed references during GC">
 338     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 339     <value type="REFERENCETYPE" field="type" label="Type" />
 340     <value type="ULONG" field="count" label="Total Count" />
 341   </event>
 342 
 343   <struct id="CopyFailed">
 344     <value type="ULONG" field="objectCount" label="Object Count"/>
 345     <value type="BYTES64" field="firstSize" label="First Failed Object Size"/>
 346     <value type="BYTES64" field="smallestSize" label="Smallest Failed Object Size"/>
 347     <value type="BYTES64" field="totalSize" label="Total Object Size"/>
 348   </struct>
 349 
 350   <event id="ObjectCountAfterGC" path="vm/gc/detailed/object_count_after_gc" is_instant="true" label="Object Count after GC">
 351     <value type="UINT" field="gcId"  label="GC Identifier" relation="GcId" />
 352     <value type="CLASS" field="objectClass" label="Object Class" />
 353     <value type="LONG" field="count" label="Count" />
 354     <value type="BYTES64" field="totalSize" label="Total Size" />
 355   </event>
 356 
 357   <struct id="G1EvacuationStatistics">
 358     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 359     <value type="BYTES64" field="allocated" label="Allocated" description="Total memory allocated by PLABs"/>
 360     <value type="BYTES64" field="wasted" label="Wasted" description="Total memory wasted within PLABs due to alignment or refill"/>
 361     <value type="BYTES64" field="used" label="Used" description="Total memory occupied by objects within PLABs"/>
 362     <value type="BYTES64" field="undoWaste" label="Undo Wasted" description="Total memory wasted due to allocation undo within PLABs"/>
 363     <value type="BYTES64" field="regionEndWaste" label="Region End Wasted" description="Total memory wasted at the end of regions due to refill"/>
 364     <value type="UINT" field="regionsRefilled" label="Region Refills" description="Total memory wasted at the end of regions due to refill"/>
 365     <value type="BYTES64" field="directAllocated" label="Allocated (direct)" description="Total memory allocated using direct allocation outside of PLABs"/>
 366     <value type="BYTES64" field="failureUsed" label="Used (failure)" description="Total memory occupied by objects in regions where evacuation failed"/>
 367     <value type="BYTES64" field="failureWaste" label="Wasted (failure)" description="Total memory left unused in regions where evacuation failed"/>
 368   </struct>
 369 
 370   <event id="G1EvacuationYoungStatistics" path="vm/gc/detailed/g1_evac_young_stats" label="G1 Evacuation Statistics for Young"
 371          is_instant="true" description="Memory related evacuation statistics during GC for the young generation">
 372     <structvalue type="G1EvacuationStatistics" field="statistics" label="Evacuation Statistics"/>
 373   </event>
 374 
 375   <event id="G1EvacuationOldStatistics" path="vm/gc/detailed/g1_evac_old_stats" label="G1 Evacuation Memory Statistics for Old"
 376          is_instant="true" description="Memory related evacuation statistics during GC for the old generation">
 377     <structvalue type="G1EvacuationStatistics" field="statistics" label="Evacuation Statistics"/>
 378   </event>
 379 
 380   <event id="G1BasicIHOP" path="vm/gc/detailed/g1_basic_ihop_status" label="G1 Basic IHOP Statistics"
 381          is_instant="true" description="Basic statistics related to current IHOP calculation">
 382     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 383     <value type="BYTES64" field="threshold" label="Current IHOP Threshold" description="Current IHOP threshold"/>
 384     <value type="PERCENTAGE" field="thresholdPercentage" label="Current IHOP Threshold" description="Current IHOP threshold in percent of old generation"/>
 385     <value type="BYTES64" field="targetOccupancy" label="Target Occupancy" description="Target old generation occupancy to reach at the start of mixed GC"/>
 386     <value type="BYTES64" field="currentOccupancy" label="Current Occupancy" description="Current old generation occupancy"/>
 387     <value type="BYTES64" field="recentMutatorAllocationSize" label="Recent Mutator Allocation Size" description="Mutator allocation during mutator operation in the most recent interval"/>
 388     <value type="MILLIS" field="recentMutatorDuration" label="Recent Mutator Duration" description="Time the mutator ran in the most recent interval"/>
 389     <value type="DOUBLE" field="recentAllocationRate" label="Recent Allocation Rate" description="Allocation rate of the mutator in the most recent interval in bytes/second"/>
 390     <value type="MILLIS" field="lastMarkingDuration" label="Last Marking Duration" description="Last time from the end of the last initial mark to the first mixed GC"/>
 391   </event>
 392 
 393   <event id="G1AdaptiveIHOP" path="vm/gc/detailed/g1_adaptive_ihop_status" label="G1 Adaptive IHOP Statistics"
 394          is_instant="true" description="Statistics related to current adaptive IHOP calculation">
 395     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 396     <value type="BYTES64" field="threshold" label="Threshold" description="Current IHOP Threshold"/>
 397     <value type="PERCENTAGE" field="thresholdPercentage" label="Threshold" description="Current IHOP threshold in percent of the internal target occupancy"/>
 398     <value type="BYTES64" field="ihopTargetOccupancy" label="IHOP Target Occupancy" description="Internal target old generation occupancy to reach at the start of mixed GC"/>
 399     <value type="BYTES64" field="currentOccupancy" label="Current Occupancy" description="Current old generation occupancy"/>
 400     <value type="BYTES64" field="additionalBufferSize" label="Additional Buffer" description="Additional buffer size" experimental="true"/>
 401     <value type="DOUBLE" field="predictedAllocationRate" label="Predicted Allocation Rate" description="Current predicted allocation rate for the mutator in bytes/second"/>
 402     <value type="MILLIS" field="predictedMarkingDuration" label="Predicted Marking Duration" description="Current predicted time from the end of the last initial mark to the first mixed GC"/>
 403     <value type="BOOLEAN" field="predictionActive" label="Prediction Active" description="Indicates whether the adaptive IHOP prediction is active"/>
 404   </event>
 405 
 406   <!-- Promotion events, Supported GCs are Parallel Scavange, G1 and CMS with Parallel New. -->
 407   <event id="PromoteObjectInNewPLAB" path="vm/gc/detailed/object_promotion_in_new_PLAB" label="Promotion in new PLAB"
 408          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."
 409          has_thread="true" has_stacktrace="false" is_instant="true">
 410     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId" description="Identifier signifying GC during which the object was promoted"/>
 411     <value type="CLASS" field="objectClass" label="Object Class" description="Class of promoted object"/>
 412     <value type="BYTES64" field="objectSize" label="Object Size" description="Size of promoted object"/>
 413     <value type="UINT" field="tenuringAge" label="Object Tenuring Age" 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."/>
 414     <value type="BOOLEAN" field="tenured" label="Tenured" description="True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space"/>
 415     <value type="BYTES64" field="plabSize" label="PLAB Size" description="Size of the allocated PLAB to which the object was copied"/>
 416   </event>
 417 
 418   <event id="PromoteObjectOutsidePLAB" path="vm/gc/detailed/object_promotion_outside_PLAB" label="Promotion outside PLAB"
 419          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."
 420          has_thread="true" has_stacktrace="false" is_instant="true">
 421     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId" description="Identifier signifying GC during which the object was promoted"/>
 422     <value type="CLASS" field="objectClass" label="Object Class" description="Class of promoted object"/>
 423     <value type="BYTES64" field="objectSize" label="Object Size" description="Size of promoted object"/>
 424     <value type="UINT" field="tenuringAge" label="Object Tenuring Age" 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."/>
 425     <value type="BOOLEAN" field="tenured" label="Tenured" description="True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space"/>
 426   </event>
 427 
 428   <event id="PromotionFailed" path="vm/gc/detailed/promotion_failed" label="Promotion Failed" is_instant="true"
 429          description="Promotion of an object failed">
 430     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 431     <structvalue type="CopyFailed" field="promotionFailed" label="Promotion Failed Data"/>
 432     <value type="THREAD" field="thread" label="Running thread"/>
 433   </event>
 434 
 435   <event id="EvacuationFailed" path="vm/gc/detailed/evacuation_failed" label="Evacuation Failed" is_instant="true"
 436          description="Evacuation of an object failed">
 437     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 438     <structvalue type="CopyFailed" field="evacuationFailed" label="Evacuation Failed Data"/>
 439   </event>
 440 
 441   <event id="ConcurrentModeFailure" path="vm/gc/detailed/concurrent_mode_failure" label="Concurrent Mode Failure"
 442          is_instant="true" description="Concurrent Mode failed">
 443     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 444   </event>
 445 
 446   <event id="GCPhasePause" path="vm/gc/phases/pause" label="GC Phase Pause" has_thread="true">
 447     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 448     <value type="STRING" field="name" label="Name" />
 449   </event>
 450 
 451   <event id="GCPhasePauseLevel1" path="vm/gc/phases/pause_level_1" label="GC Phase Pause Level 1" has_thread="true">
 452     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 453     <value type="STRING" field="name" label="Name" />
 454   </event>
 455 
 456   <event id="GCPhasePauseLevel2" path="vm/gc/phases/pause_level_2" label="GC Phase Pause Level 2" has_thread="true">
 457     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 458     <value type="STRING" field="name" label="Name" />
 459   </event>
 460 
 461   <event id="GCPhasePauseLevel3" path="vm/gc/phases/pause_level_3" label="GC Phase Pause Level 3" has_thread="true">
 462     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 463     <value type="STRING" field="name" label="Name" />
 464   </event>
 465 
 466   <event id="GCPhasePauseLevel4" path="vm/gc/phases/pause_level_4" label="GC Phase Pause Level 4" has_thread="true">
 467     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 468     <value type="STRING" field="name" label="Name" />
 469   </event>
 470 
 471   <event id="GCPhaseConcurrent" path="vm/gc/phases/concurrent" label="GC Phase Concurrent" has_thread="true">
 472     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 473     <value type="STRING" field="name" label="Name" />
 474   </event>
 475 
 476   <event id="AllocationRequiringGC" path="vm/gc/detailed/allocation_requiring_gc" label="Allocation Requiring GC"
 477          has_thread="true" has_stacktrace="true"  is_instant="true">
 478     <value type="UINT" field="gcId"  label="Pending GC Identifier" relation="GcId" />
 479     <value type="BYTES64" field="size" label="Allocation Size" />
 480   </event>
 481 
 482   <event id="TenuringDistribution" path="vm/gc/detailed/tenuring_distribution" label="Tenuring Distribution"
 483          is_instant="true">
 484     <value type="UINT" field="gcId" label="GC Identifier" relation="GcId"/>
 485     <value type="UINT" field="age" label="Age" />
 486     <value type="BYTES64" field="size" label="Size" />
 487   </event>
 488 
 489   <event id="G1HeapRegionTypeChange" path="vm/gc/detailed/g1_heap_region_type_change" label="G1 Heap Region Type Change"
 490          description="Information about a G1 heap region type change" is_instant="true">
 491     <value type="UINT" field="index" label="Index" />
 492     <value type="G1HEAPREGIONTYPE" field="from" label="From" />
 493     <value type="G1HEAPREGIONTYPE" field="to" label="To" />
 494     <value type="ADDRESS" field="start" label="Start" />
 495     <value type="BYTES64" field="used" label="Used" />
 496     <value type="UINT" field="allocationContext" label="Allocation Context" />
 497   </event>
 498 
 499   <!-- Compiler events -->
 500 
 501   <event id="Compilation" path="vm/compiler/compilation" label="Compilation"
 502          has_thread="true" is_requestable="false" is_constant="false">
 503     <value type="METHOD" field="method" label="Java Method"/>
 504     <value type="UINT" field="compileId" label="Compilation Identifier" relation="CompileId"/>
 505     <value type="USHORT" field="compileLevel" label="Compilation Level"/>
 506     <value type="BOOLEAN" field="succeded" label="Succeeded"/>
 507     <value type="BOOLEAN" field="isOsr" label="On Stack Replacement"/>
 508     <value type="BYTES" field="codeSize" label="Compiled Code Size"/>
 509     <value type="BYTES" field="inlinedBytes" label="Inlined Code Size"/>
 510   </event>
 511 
 512   <event id="CompilerPhase" path="vm/compiler/phase" label="Compiler Phase"
 513          has_thread="true" is_requestable="false" is_constant="false">
 514     <value type="COMPILERPHASETYPE" field="phase" label="Compile Phase"/>
 515     <value type="UINT" field="compileId" label="Compilation Identifier" relation="CompileId"/>
 516     <value type="USHORT" field="phaseLevel" label="Phase Level"/>
 517   </event>
 518 
 519   <event id="CompilationFailure" path="vm/compiler/failure" label="Compilation Failure"
 520          has_thread="true" is_requestable="false" is_constant="false" is_instant="true">
 521     <value type="STRING" field="failureMessage" label="Failure Message"/>
 522     <value type="UINT" field="compileId" label="Compilation Identifier" relation="CompileId"/>
 523   </event>
 524 
 525   <struct id="CalleeMethod">
 526     <value type="STRING" field="type" label="Class"/>
 527     <value type="STRING" field="name" label="Method Name"/>
 528     <value type="STRING" field="descriptor" label="Method Descriptor"/>
 529   </struct>
 530 
 531   <event id="CompilerInlining" path="vm/compiler/optimization/inlining" label="Method Inlining"
 532          has_thread="true" is_instant="true">
 533     <value type="UINT" field="compileId" label="Compilation Identifier" relation="CompileId"/>
 534     <value type="METHOD" field="caller" label="Caller Method"/>
 535     <structvalue type="CalleeMethod" field="callee" label="Callee Method"/>
 536     <value type="BOOLEAN" field="succeeded" label="Succeeded"/>
 537     <value type="STRING" field="message" label="Message"/>
 538     <value type="INTEGER" field="bci" label="Byte Code Index"/>
 539   </event>
 540 
 541   <!-- Code sweeper events -->
 542 
 543   <event id="SweepCodeCache" path="vm/code_sweeper/sweep" label="Sweep Code Cache"
 544          has_thread="true" is_requestable="false" is_constant="false">
 545     <value type="INTEGER" field="sweepId" label="Sweep Identifier" relation="SweepId"/>
 546     <value type="UINT" field="sweptCount" label="Methods Swept"/>
 547     <value type="UINT" field="flushedCount" label="Methods Flushed"/>
 548     <value type="UINT" field="zombifiedCount" label="Methods Zombified"/>
 549   </event>
 550 
 551   <!-- Code cache events -->
 552 
 553   <event id="CodeCacheFull" path="vm/code_cache/full" label="Code Cache Full"
 554          has_thread="true" is_requestable="false" is_constant="false" is_instant="true">
 555     <value type="CODEBLOBTYPE" field="codeBlobType" label="Code Heap"/>
 556     <value type="ADDRESS" field="startAddress" label="Start Address"/>
 557     <value type="ADDRESS" field="commitedTopAddress" label="Commited Top"/>
 558     <value type="ADDRESS" field="reservedTopAddress" label="Reserved Top"/>
 559     <value type="INTEGER" field="entryCount" label="Entries"/>
 560     <value type="INTEGER" field="methodCount" label="Methods"/>
 561     <value type="INTEGER" field="adaptorCount" label="Adaptors"/>
 562     <value type="BYTES64" field="unallocatedCapacity" label="Unallocated"/>
 563     <value type="INTEGER" field="fullCount" label="Full Count"/>
 564   </event>
 565 
 566   <event id="SafepointBegin" path="vm/runtime/safepoint/begin" label="Safepoint Begin"
 567          description="Safepointing begin" has_thread="true">
 568     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 569     <value type="INTEGER" field="totalThreadCount" label="Total Threads" description="The total number of threads at the start of safe point"/>
 570     <value type="INTEGER" field="jniCriticalThreadCount" label="JNI Critical Threads" description="The number of threads in JNI critical sections"/>
 571   </event>
 572 
 573   <event id="SafepointStateSynchronization" path="vm/runtime/safepoint/statesync" label="Safepoint State Synchronization"
 574          description="Synchronize run state of threads" has_thread="true">
 575     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 576     <value type="INTEGER" field="initialThreadCount" label="Initial Threads" description="The number of threads running at the beginning of state check"/>
 577     <value type="INTEGER" field="runningThreadCount" label="Running Threads" description="The number of threads still running"/>
 578     <value type="INTEGER" field="iterations" label="Iterations" description="Number of state check iterations"/>
 579   </event>
 580 
 581   <event id="SafepointWaitBlocked" path="vm/runtime/safepoint/waitblocked" label="Safepoint Wait Blocked"
 582          description="Safepointing begin waiting on running threads to block" has_thread="true">
 583     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 584     <value type="INTEGER" field="runningThreadCount" label="Running Threads" description="The number running of threads wait for safe point"/>
 585   </event>
 586 
 587   <event id="SafepointCleanup" path="vm/runtime/safepoint/cleanup" label="Safepoint Cleanup"
 588          description="Safepointing begin running cleanup tasks" has_thread="true">
 589     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 590   </event>
 591 
 592   <event id="SafepointCleanupTask" path="vm/runtime/safepoint/cleanuptask" label="Safepoint Cleanup Task"
 593          description="Safepointing begin running cleanup tasks" has_thread="true">
 594     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 595     <value type="STRING" field="name" label="Task Name" description="The task name"/>
 596   </event>
 597 
 598   <event id="SafepointEnd" path="vm/runtime/safepoint/end" label="Safepoint End"
 599          description="Safepointing end" has_thread="true">
 600     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" relation="SafepointId"/>
 601   </event>
 602 
 603   <event id="ExecuteVMOperation" path="vm/runtime/execute_vm_operation" label="VM Operation"
 604          description="Execution of a VM Operation" has_thread="true">
 605     <value type="VMOPERATIONTYPE" field="operation" label="Operation" />
 606     <value type="BOOLEAN" field="safepoint" label="At Safepoint" description="If the operation occured at a safepoint"/>
 607     <value type="BOOLEAN" field="blocking" label="Caller Blocked" description="If the calling thread was blocked until the operation was complete"/>
 608     <value type="THREAD" field="caller" label="Caller" transition="FROM" description="Thread requesting operation. If non-blocking, will be set to 0 indicating thread is unknown"/>
 609     <value type="INTEGER" field="safepointId" label="Safepoint Identifier" description="The safepoint (if any) under which this operation was completed" relation="SafepointId"/>
 610   </event>
 611 
 612   <!-- Allocation events -->
 613   <event id="ObjectAllocationInNewTLAB" path="java/object_alloc_in_new_TLAB" label="Allocation in new TLAB"
 614          description="Allocation in new Thread Local Allocation Buffer" has_thread="true" has_stacktrace="true" is_instant="true">
 615     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 616     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 617     <value type="BYTES64" field="tlabSize" label="TLAB Size"/>
 618   </event>
 619 
 620   <event id="ObjectAllocationOutsideTLAB" path="java/object_alloc_outside_TLAB" label="Allocation outside TLAB"
 621          description="Allocation outside Thread Local Allocation Buffers" has_thread="true" has_stacktrace="true" is_instant="true">
 622     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 623     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 624   </event>
 625 </events>