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src/hotspot/share/trace/traceevents.xml

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rev 49619 : JEP 328 : Flight Recorder open source preview


 628   </event>
 629 
 630   <event id="Shutdown" path="vm/runtime/shutdown" label="VM Shutdown"
 631          description="VM shutting down" has_thread="true" has_stacktrace="true" is_instant="true">
 632     <value type="STRING" field="reason" label="Reason" description="Reason for VM shutdown"/>
 633   </event>
 634 
 635   <!-- Allocation events -->
 636   <event id="ObjectAllocationInNewTLAB" path="java/object_alloc_in_new_TLAB" label="Allocation in new TLAB"
 637          description="Allocation in new Thread Local Allocation Buffer" has_thread="true" has_stacktrace="true" is_instant="true">
 638     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 639     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 640     <value type="BYTES64" field="tlabSize" label="TLAB Size"/>
 641   </event>
 642 
 643   <event id="ObjectAllocationOutsideTLAB" path="java/object_alloc_outside_TLAB" label="Allocation outside TLAB"
 644          description="Allocation outside Thread Local Allocation Buffers" has_thread="true" has_stacktrace="true" is_instant="true">
 645     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 646     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 647   </event>




























































































































































































































































































































































 648 </events>


 628   </event>
 629 
 630   <event id="Shutdown" path="vm/runtime/shutdown" label="VM Shutdown"
 631          description="VM shutting down" has_thread="true" has_stacktrace="true" is_instant="true">
 632     <value type="STRING" field="reason" label="Reason" description="Reason for VM shutdown"/>
 633   </event>
 634 
 635   <!-- Allocation events -->
 636   <event id="ObjectAllocationInNewTLAB" path="java/object_alloc_in_new_TLAB" label="Allocation in new TLAB"
 637          description="Allocation in new Thread Local Allocation Buffer" has_thread="true" has_stacktrace="true" is_instant="true">
 638     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 639     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 640     <value type="BYTES64" field="tlabSize" label="TLAB Size"/>
 641   </event>
 642 
 643   <event id="ObjectAllocationOutsideTLAB" path="java/object_alloc_outside_TLAB" label="Allocation outside TLAB"
 644          description="Allocation outside Thread Local Allocation Buffers" has_thread="true" has_stacktrace="true" is_instant="true">
 645     <value type="CLASS" field="objectClass" label="Object Class" description="Class of allocated object"/>
 646     <value type="BYTES64" field="allocationSize" label="Allocation Size"/>
 647   </event>
 648   
 649    <event id="OldObjectSample" path="java/old_object" label="Old Object Sample"
 650        description="A potential memory leak" has_stacktrace="true" has_thread="true" is_instant="true" cutoff="true">
 651     <value type="TICKS" field="allocationTime" label="Allocation Time"/>
 652     <value type="OLDOBJECT" field="object" label="Object"/>
 653     <value type="INTEGER" field="arrayElements" label="Array Elements" description="If the object is an array, the number of elements, or -1 if it is not an array"/>
 654     <value type="OLDOBJECTGCROOT" field="root" label="GC Root"/>
 655   </event>
 656 
 657   <event id="DumpReason" path="flight_recorder/dump_reason" label="Recording Reason"
 658          description="Who requested the recording and why" is_instant="true">
 659     <value type="STRING" field="reason" label="Reason" description="Reason for writing recording data to disk"/>
 660     <value type="INTEGER" field="recordingId" label="Recording Id"  description="Id of the recording that triggered the dump, or -1 if it was not related to a recording"/>
 661   </event>
 662 
 663   <event id="DataLoss" path="flight_recorder/data_loss" label="Data Loss"
 664          description="Data could not be copied out from a buffer, typically because of contention" is_instant="true">
 665     <value type="BYTES" field="amount" label="Amount" description="Amount lost data"/>
 666     <value type="BYTES" field="total" label="Total" description="Total lost amount for thread"/>
 667   </event>
 668   
 669   <event id="JVMInformation" path="vm/info" label="JVM Information"
 670          description="Description of JVM and the Java application"
 671          is_requestable="true" is_constant="true">
 672     <value type="STRING" field="jvmName" label="JVM Name"/>
 673     <value type="STRING" field="jvmVersion" label="JVM Version"/>
 674     <value type="STRING" field="jvmArguments" label="JVM Command Line Arguments"/>
 675     <value type="STRING" field="jvmFlags" label="JVM Settings File Arguments"/>
 676     <value type="STRING" field="javaArguments" label="Java Application Arguments"/>
 677     <value type="EPOCHMILLIS" field="jvmStartTime" label="JVM Start Time"/>
 678   </event>
 679 
 680   <event id="OSInformation" path="os/information" label="OS Information"
 681          is_requestable="true" is_constant="true">
 682     <value type="STRING" field="osVersion" label="OS Version"/>
 683   </event>
 684 
 685   <event id="InitialSystemProperty" path="vm/initial_system_property" label="Initial System Property"
 686          description="System Property at JVM start" is_requestable="true" is_constant="true">
 687     <value type="STRING" field="key" label="Key"/>
 688     <value type="STRING" field="value" label="Value"/>
 689   </event>
 690 
 691   <event id="InitialEnvironmentVariable" path="os/initial_environment_variable" label="Initial Environment Variable"
 692          is_requestable="true" is_constant="true">
 693     <value type="STRING" field="key" label="Key"/>
 694     <value type="STRING" field="value" label="Value"/>
 695   </event>
 696 
 697   <event id="SystemProcess" path="os/system_process" label="System Process"
 698          is_requestable="true" is_constant="true">
 699     <value type="STRING" field="pid" label="Process Identifier"/>
 700     <value type="STRING" field="commandLine" label="Command Line"/>
 701   </event>
 702 
 703   <event id="CPUInformation" path="os/processor/cpu_information" label="CPU Information"
 704          is_requestable="true" is_constant="true">
 705     <value type="STRING" field="cpu" label="Type"/>
 706     <value type="STRING" field="description" label="Description"/>
 707     <value type="UINT" field="sockets" label="Sockets"/>
 708     <value type="UINT" field="cores" label="Cores"/>
 709     <value type="UINT" field="hwThreads" label="Hardware Threads"/>
 710   </event>
 711 
 712   <event id="CPUTimeStampCounter" path="os/processor/cpu_tsc" label="CPU Time Stamp Counter"
 713          is_requestable="true" is_constant="true">
 714     <value type="BOOLEAN" field="fastTimeEnabled" label="Fast Time"/>
 715     <value type="BOOLEAN" field="fastTimeAutoEnabled" label="Trusted Platform"/>
 716     <value type="LONG" field="osFrequency" label="OS Frequency Per Second"/>
 717     <value type="LONG" field="fastTimeFrequency" label="Fast Time Frequency per Second"/>
 718   </event>
 719 
 720   <event id="CPULoad" path="os/processor/cpu_load" label="CPU Load"
 721          description="OS CPU Load" is_requestable="true">
 722   <value type="PERCENTAGE" field="jvmUser" label="JVM User"/>
 723   <value type="PERCENTAGE" field="jvmSystem" label="JVM System"/>
 724   <value type="PERCENTAGE" field="machineTotal" label="Machine Total"/>
 725   </event>
 726 
 727   <event id="ThreadCPULoad" path="os/processor/thread_cpu_load" label="Thread CPU Load"
 728          is_requestable="true" has_thread="true">
 729     <value type="PERCENTAGE" field="user" label="User Mode CPU Load" description="User mode thread CPU load"/>
 730     <value type="PERCENTAGE" field="system" label="System Mode CPU Load" description="System mode thread CPU load"/>
 731   </event>
 732 
 733   <event id="ThreadContextSwitchRate" path="os/processor/context_switch_rate"
 734          label="Thread Context Switch Rate" is_requestable="true">
 735   <value type="FLOAT" field="switchRate" label="Switch Rate" description="Number of context switches per second"/>
 736   </event>
 737 
 738   <event id="JavaThreadStatistics" path="java/statistics/threads" label="Java Thread Statistics"
 739          is_requestable="true">
 740     <value type="LONG" field="activeCount" label="Active Threads"  description="Number of live active threads including both daemon and non-daemon threads"/>
 741     <value type="LONG" field="daemonCount" label="Daemon Threads" description="Number of live daemon threads"/>
 742     <value type="LONG" field="accumulatedCount" label="Accumulated Threads" description="Number of threads created and also started since JVM start"/>
 743     <value type="LONG" field="peakCount" label="Peak Threads" description="Peak live thread count since JVM start or when peak count was reset"/>
 744   </event>
 745 
 746   <event id="ClassLoadingStatistics" path="java/statistics/class_loading" label="Class Loading Statistics"
 747          is_requestable="true">
 748     <value type="LONG" field="loadedClassCount" label="Loaded Class Count"  description="Number of classes loaded since JVM start"/>
 749     <value type="LONG" field="unloadedClassCount" label="Unloaded Class Count" description="Number of classes unloaded since JVM start"/>
 750   </event>
 751 
 752   <event id="ClassLoaderStatistics" path="java/statistics/class_loaders" label="Class Loader Statistics"
 753          is_requestable="true">
 754     <value type="CLASSLOADER" field="classLoader" label="Class Loader"/>
 755     <value type="CLASSLOADER" field="parentClassLoader" label="Parent Class Loader"/>
 756     <value type="ADDRESS" field="classLoaderData" label="ClassLoaderData pointer" description="Pointer to the ClassLoaderData structure in the JVM"/>
 757     <value type="LONG" field="classCount" label="Classes" description="Number of loaded classes"/>
 758     <value type="BYTES64" field="chunkSize" label="Total Chunk Size" description="Total size of all allocated metaspace chunks (each chunk has several blocks)"/>
 759     <value type="BYTES64" field="blockSize" label="Total Block Size" description="Total size of all allocated metaspace blocks (each chunk has several blocks)"/>
 760     <value type="LONG" field="anonymousClassCount" label="Unsafe Anonymous Classes" description="Number of loaded classes to support invokedynamic"/>
 761     <value type="BYTES64" field="anonymousChunkSize" label="Total Unsafe Anonymous Classes Chunk Size" description="Total size of all allocated metaspace chunks for anonymous classes (each chunk has several blocks)"/>
 762     <value type="BYTES64" field="anonymousBlockSize" label="Total Unsafe Anonymous Classes Block Size" description="Total size of all allocated metaspace blocks for anonymous classes (each chunk has several blocks)"/>
 763   </event>
 764     
 765   <event id="ThreadAllocationStatistics" path="java/statistics/thread_allocation" label="Thread Allocation Statistics"
 766          is_requestable="true">
 767     <value type="BYTES64" field="allocated" label="Allocated" description="Approximate number of bytes allocated since thread start"/>
 768     <value type="THREAD" field="thread" label="Thread"/>
 769   </event>
 770 
 771   <event id="PhysicalMemory" path="os/memory/physical_memory" label="Physical Memory"
 772          description="OS Physical Memory" is_requestable="true">
 773     <value type="BYTES64" field="totalSize" label="Total Size"
 774         description="Total amount of physical memory available to OS"/>
 775     <value type="BYTES64" field="usedSize" label="Used Size"
 776         description="Total amount of physical memory in use"/>
 777   </event>
 778 
 779   <event id="ExecutionSample" path="vm/prof/execution_sample" label="Method Profiling Sample"
 780          description="Snapshot of a threads state"
 781          is_requestable="true">
 782     <value type="THREAD" field="sampledThread" label="Thread"/>
 783     <value type="STACKTRACE" field="stackTrace" label="Stack Trace"/>
 784     <value type="THREADSTATE" field="state" label="Thread State"/>
 785   </event>
 786   
 787   <event id="NativeMethodSample" path="vm/prof/native_method_sample" label="Method Profiling Sample Native"
 788          description="Snapshot of a threads state when in native"
 789          is_requestable="true" ignore_check="true">
 790     <value type="THREAD" field="sampledThread" label="Thread"/>
 791     <value type="STACKTRACE" field="stackTrace" label="Stack Trace"/>
 792     <value type="THREADSTATE" field="state" label="Thread State"/>
 793   </event>
 794   
 795   <event id="ThreadDump" path="vm/runtime/thread_dump" label="Thread Dump"
 796          is_requestable="true">
 797     <value type="STRING" field="result" label="Thread Dump"/>
 798   </event>
 799 
 800   <event id="NativeLibrary" path="vm/runtime/native_library" label="Native Library" is_requestable="true">
 801     <value type="STRING" field="name" label="Name"/>
 802     <value type="ADDRESS" field="baseAddress" label="Base Address" description="Starting address of the module"/>
 803     <value type="ADDRESS" field="topAddress" label="Top Address" description="Ending address of the module"/>
 804   </event>
 805 
 806   <event id="ModuleRequire" path="vm/runtime/modules/module_require" label="Module Require"
 807          has_thread="false" is_requestable="true" description="A directed edge representing a dependency">
 808     <value type="MODULE" field="source" label="Source Module"/>
 809     <value type="MODULE" field="requiredModule" label="Required Module"/>
 810   </event>
 811 
 812   <event id="ModuleExport" path="vm/runtime/modules/module_export" label="Module Export"
 813          has_thread="false" is_requestable="true">
 814     <value type="PACKAGE" field="exportedPackage" label="Exported Package"/>
 815     <value type="MODULE" field="targetModule" label="Target Module"
 816            description="Module to which the package is qualifiedly exported.
 817              If null, the package is unqualifiedly exported"/>
 818   </event>
 819 
 820   <!-- Compiler events -->
 821 
 822   <event id="CompilerStatistics" path="vm/compiler/stats" label="Compiler Statistics"
 823          has_thread="false" is_requestable="true" is_constant="false" is_instant="true">
 824     <value type="INTEGER" field="compileCount" label="Compiled Methods"/>
 825     <value type="INTEGER" field="bailoutCount" label="Bailouts"/>
 826     <value type="INTEGER" field="invalidatedCount" label="Invalidated Compilations"/>
 827     <value type="INTEGER" field="osrCompileCount" label="OSR Compilations"/>
 828     <value type="INTEGER" field="standardCompileCount" label="Standard Compilations"/>
 829     <value type="BYTES" field="osrBytesCompiled" label="OSR Bytes Compiled"/>
 830     <value type="BYTES" field="standardBytesCompiled" label="Standard Bytes Compiled"/>
 831     <value type="BYTES" field="nmetodsSize" label="Compilation Resulting Size"/>
 832     <value type="BYTES" field="nmetodCodeSize" label="Compilation Resulting Code Size"/>
 833     <value type="MILLIS" field="peakTimeSpent" label="Peak Time"/>
 834     <value type="MILLIS" field="totalTimeSpent" label="Total time"/>
 835   </event>
 836 
 837   <event id="CompilerConfiguration" path="vm/compiler/config" label="Compiler Configuration"
 838          has_thread="false" is_requestable="true" is_constant="true" is_instant="true">
 839     <value type="INTEGER" field="threadCount" label="Thread Count"/>
 840     <value type="BOOLEAN" field="tieredCompilation" label="Tiered Compilation"/>
 841   </event>
 842 
 843   <!-- Code cache events -->
 844 
 845   <event id="CodeCacheStatistics" path="vm/code_cache/stats" label="Code Cache Statistics"
 846          has_thread="false" is_requestable="true" is_constant="false" is_instant="true">
 847     <value type="CODEBLOBTYPE" field="codeBlobType" label="Code Heap"/>
 848     <value type="ADDRESS" field="startAddress" label="Start Address"/>
 849     <value type="ADDRESS" field="reservedTopAddress" label="Reserved Top"/>
 850     <value type="INTEGER" field="entryCount" label="Entries"/>
 851     <value type="INTEGER" field="methodCount" label="Methods"/>
 852     <value type="INTEGER" field="adaptorCount" label="Adaptors"/>
 853     <value type="BYTES64" field="unallocatedCapacity" label="Unallocated"/>
 854     <value type="INTEGER" field="fullCount" label="Full Count"/>
 855   </event>
 856 
 857   <event id="CodeCacheConfiguration" path="vm/code_cache/config" label="Code Cache Configuration"
 858          has_thread="false" is_requestable="true" is_constant="true" is_instant="true">
 859     <value type="BYTES64" field="initialSize" label="Initial Size"/>
 860     <value type="BYTES64" field="reservedSize" label="Reserved Size"/>
 861     <value type="BYTES64" field="nonNMethodSize" label="Non-nmethod Size"/>
 862     <value type="BYTES64" field="profiledSize" label="Profiled Size"/>
 863     <value type="BYTES64" field="nonProfiledSize" label="Non-profiled Size"/>
 864     <value type="BYTES64" field="expansionSize" label="Expansion size"/>
 865     <value type="BYTES64" field="minBlockLength" label="Minimum Block Length"/>
 866     <value type="ADDRESS" field="startAddress" label="Start Address"/>
 867     <value type="ADDRESS" field="reservedTopAddress" label="Reserved Top"/>
 868   </event>
 869 
 870   <!-- Code sweeper events -->
 871 
 872   <event id="CodeSweeperStatistics" path="vm/code_sweeper/stats" label="Code Sweeper Statistics"
 873          has_thread="false" is_requestable="true" is_constant="false" is_instant="true">
 874     <value type="INTEGER" field="sweepCount" label="Sweeps"/>
 875     <value type="INTEGER" field="methodReclaimedCount" label="Methods Reclaimed"/>
 876     <value type="TICKSPAN" field="totalSweepTime" label="Time Spent Sweeping"/>
 877     <value type="TICKSPAN" field="peakFractionTime" label="Peak Time Fraction Sweep"/>
 878     <value type="TICKSPAN" field="peakSweepTime" label="Peak Time Full Sweep"/>
 879   </event>
 880 
 881   <event id="CodeSweeperConfiguration" path="vm/code_sweeper/config" label="Code Sweeper Configuration"
 882          has_thread="false" is_requestable="true" is_constant="true" is_instant="true">
 883     <value type="BOOLEAN" field="sweeperEnabled" label="Code Sweeper Enabled"/>
 884     <value type="BOOLEAN" field="flushingEnabled" label="Code Cache Flushing Enabled"/>
 885   </event>
 886 
 887   <event id="IntFlag" path="vm/flag/int" is_requestable="true" label="Int Flag"
 888          is_constant="true">
 889     <value type="STRING" field="name" label="Name" />
 890     <value type="INTEGER" field="value" label="Value" />
 891     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 892   </event>
 893 
 894   <event id="UnsignedIntFlag" path="vm/flag/uint" is_requestable="true" label="Unsigned Int Flag"
 895          is_constant="true">
 896     <value type="STRING" field="name" label="Name" />
 897     <value type="UINT" field="value" label="Value" />
 898     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 899   </event>
 900 
 901   <event id="LongFlag" path="vm/flag/long" is_requestable="true" label="Long Flag"
 902          is_constant="true">
 903     <value type="STRING" field="name" label="Name" />
 904     <value type="LONG" field="value" label="Value" />
 905     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 906   </event>
 907 
 908   <event id="UnsignedLongFlag" path="vm/flag/ulong" is_requestable="true" label="Unsigned Long Flag"
 909          is_constant="true">
 910     <value type="STRING" field="name" label="Name" />
 911     <value type="ULONG" field="value" label="Value" />
 912     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 913   </event>
 914 
 915   <event id="DoubleFlag" path="vm/flag/double" is_requestable="true" label="Double Flag"
 916          is_constant="true">
 917     <value type="STRING" field="name" label="Name" />
 918     <value type="DOUBLE" field="value" label="Value" />
 919     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 920   </event>
 921 
 922   <event id="BooleanFlag" path="vm/flag/boolean" is_requestable="true" label="Boolean Flag"
 923          is_constant="true">
 924     <value type="STRING" field="name" label="Name" />
 925     <value type="BOOLEAN" field="value" label="Value" />
 926     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 927   </event>
 928 
 929   <event id="StringFlag" path="vm/flag/string" is_requestable="true" label="String Flag"
 930          is_constant="true">
 931     <value type="STRING" field="name" label="Name" />
 932     <value type="STRING" field="value" label="Value" />
 933     <value type="FLAGVALUEORIGIN" field="origin" label="Origin" />
 934   </event>
 935 
 936   <event id="ObjectCount" path="vm/gc/detailed/object_count" is_instant="true"
 937          is_requestable="true" label="Object Count">
 938     <value type="UINT" field="gcId"  label="GC Identifier" relation="GcId" />
 939     <value type="CLASS" field="objectClass" label="Object Class" />
 940     <value type="LONG" field="count" label="Count" />
 941     <value type="BYTES64" field="totalSize" label="Total Size" />
 942   </event>
 943 
 944   <event id="G1HeapRegionInformation" path="vm/gc/detailed/g1_heap_region_information" label="G1 Heap Region Information"
 945          description="Information about a specific heap region in the G1 GC" is_requestable="true">
 946     <value type="UINT" field="index" label="Index" />
 947     <value type="G1HEAPREGIONTYPE" field="type" label="Type" />
 948     <value type="ADDRESS" field="start" label="Start" />
 949     <value type="BYTES64" field="used" label="Used" />
 950   </event>
 951 
 952   <event id="GCConfiguration" path="vm/gc/configuration/gc" label="GC Configuration"
 953          description="The configuration of the garbage collector" is_requestable="true" is_constant="true">
 954     <value type="GCNAME" field="youngCollector" label="Young Garbage Collector" description="The garbage collector used for the young generation"/>
 955     <value type="GCNAME" field="oldCollector" label="Old Garbage Collector" description="The garbage collector used for the old generation"/>
 956     <value type="UINT" field="parallelGCThreads" label="Parallel GC Threads" description="Number of parallel threads to use for garbage collection"/>
 957     <value type="UINT" field="concurrentGCThreads" label="Concurrent GC Threads" description="Number of concurrent threads to use for garbage collection"/>
 958     <value type="BOOLEAN" field="usesDynamicGCThreads" label="Uses Dynamic GC Threads" description="Whether a dynamic number of GC threads are used or not" />
 959     <value type="BOOLEAN" field="isExplicitGCConcurrent" label="Concurrent Explicit GC" description="Whether System.gc() is concurrent or not"/>
 960     <value type="BOOLEAN" field="isExplicitGCDisabled" label="Disabled Explicit GC" description="Whether System.gc() will cause a garbage collection or not"/>
 961     <value type="MILLIS" field="pauseTarget" label="Pause Target" description="Target for GC pauses"/>
 962     <value type="UINT" field="gcTimeRatio" label="GC Time Ratio" description="Target for runtime vs garbage collection time"/>
 963   </event>
 964 
 965   <event id="GCSurvivorConfiguration" path="vm/gc/configuration/survivor" label="GC Survivor Configuration"
 966          description="The configuration of the survivors of garbage collection" is_requestable="true" is_constant="true">
 967     <value type="UBYTE" field="maxTenuringThreshold" label="Maximum Tenuring Threshold" description="Upper limit for the age of how old objects to keep in the survivor area" />
 968     <value type="UBYTE" field="initialTenuringThreshold" label="Initial Tenuring Threshold" description="Initial age limit for how old objects to keep in survivor area" />
 969   </event>
 970 
 971   <event id="GCTLABConfiguration" path="vm/gc/configuration/tlab" label="TLAB Configuration"
 972          description="The configuration of the Thread Local Allocation Buffers (TLABs)" is_requestable="true" is_constant="true">
 973     <value type="BOOLEAN" field="usesTLABs" label="TLABs Used" description="If Thread Local Allocation Buffers (TLABs) are in use"/>
 974     <value type="BYTES64" field="minTLABSize" label="Minimum TLAB Size" />
 975     <value type="BYTES64" field="tlabRefillWasteLimit" label="TLAB Refill Waste Limit"/>
 976   </event>
 977 
 978   <event id="GCHeapConfiguration" path="vm/gc/configuration/heap" label="GC Heap Configuration"
 979          description="The configuration of the garbage collected heap" is_requestable="true" is_constant="true">
 980     <value type="BYTES64" field="minSize" label="Minimum Heap Size" />
 981     <value type="BYTES64" field="maxSize" label="Maximum Heap Size" />
 982     <value type="BYTES64" field="initialSize" label="Initial Heap Size" />
 983     <value type="BOOLEAN" field="usesCompressedOops" label="If Compressed Oops Are Used" description="If compressed Oops (Ordinary Object Pointers) are enabled" />
 984     <value type="NARROWOOPMODE" field="compressedOopsMode" label="Compressed Oops Mode" description="The kind of compressed oops being used" />
 985     <value type="BYTES64" field="objectAlignment" label="Object Alignment" description="Object alignment (in bytes) on the heap" />
 986     <value type="UBYTE" field="heapAddressBits" label="Heap Address Size" description="Heap Address Size (in bits)" />
 987   </event>
 988 
 989   <event id="YoungGenerationConfiguration" path="vm/gc/configuration/young_generation" label="Young Generation Configuration"
 990          description="The configuration of the young generation of the garbage collected heap" is_requestable="true" is_constant="true">
 991     <value type="BYTES64" field="minSize" label="Minimum Young Generation Size" />
 992     <value type="BYTES64" field="maxSize" label="Maximum Young Generation Size" />
 993     <value type="UINT" field="newRatio" label="New Ratio" description="The size of the young generation relative to the tenured generation" />
 994   </event>
 995   
 996 </events>
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