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  1. JDK
  2. JDK-8283147

Include NonJavaThread stacktrace during thread dump

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    Details

    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 19
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
      svc

      Description

      When we use jcmd <pid> Thread.dump/jstack <pid>, we could dump all Java thread stack trace, but unfortunately we are not able to print NonJavaThread stack trace such as VMThread/GCWorker, etc. For these threads, we know nothing about what are they doing/are they blocked in pthread condition from jstack output´╝Ü

      ====== JStack Ouput(Currrent)
      "VM Thread" os_prio=31 cpu=24295.92ms elapsed=68237.50s tid=0x00007f8d49046000 nid=0x4703 runnable

      "GC Thread#0" os_prio=31 cpu=3749.61ms elapsed=68237.53s tid=0x00007f8d49809800 nid=0x3603 runnable

      "GC Thread#1" os_prio=31 cpu=3695.24ms elapsed=68236.59s tid=0x00007f8d4a9b3000 nid=0x6103 runnable

      "GC Thread#2" os_prio=31 cpu=3681.42ms elapsed=68236.09s tid=0x00007f8d48249000 nid=0x12f27 runnable

      "CMS Main Thread" os_prio=31 cpu=6613.32ms elapsed=68237.53s tid=0x00007f8d4780f800 nid=0x4b03 runnable

      "CMS Thread#0" os_prio=31 cpu=2429.86ms elapsed=68237.53s tid=0x00007f8d4900e000 nid=0x3703 runnable

      "CMS Thread#1" os_prio=31 cpu=2422.35ms elapsed=68236.08s tid=0x00007f8d4d044000 nid=0x11a03 runnable

      "CMS Thread#2" os_prio=31 cpu=2418.81ms elapsed=68236.08s tid=0x00007f8d48b93800 nid=0xea03 runnable

      "VM Periodic Task Thread" os_prio=31 cpu=8224.90ms elapsed=68236.76s tid=0x00007f8d49035000 nid=0xa003 waiting on condition

      Most of above information makes no sense for further debugging. I think we can extend this functionality, e.g. add a new flag such as DumpAllThreadStackTrace, to print non java thread stack trace:

      ====== JStack Ouput(Modified)
      2022-03-16 10:46:55
      Full thread dump OpenJDK 64-Bit Server VM (19-internal-adhoc.qingfengyy.jdktip mixed mode, sharing):

      Threads class SMR info:
      _java_thread_list=0x00007f15040015f0, length=22, elements={
      0x00007f159c0255b0, 0x00007f159c1babc0, 0x00007f159c1bc180, 0x00007f159c1c21d0,
      0x00007f159c1c36a0, 0x00007f159c1c4bb0, 0x00007f159c1c6730, 0x00007f159c1c7db0,
      0x00007f159c1c9330, 0x00007f159c1fc300, 0x00007f159c211a60, 0x00007f159c213b60,
      0x00007f159c302960, 0x00007f14cc0319d0, 0x00007f14cc0375c0, 0x00007f159c307e80,
      0x00007f159c30db30, 0x00007f159c3e6db0, 0x00007f159c647300, 0x00007f159c64b600,
      0x00007f159c678910, 0x00007f1504000be0
      }

      "main" #1 prio=5 os_prio=0 cpu=766.48ms elapsed=23.73s tid=0x00007f159c0255b0 nid=115919 in Object.wait() [0x00007f15a3e58000]
         java.lang.Thread.State: TIMED_WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <no object reference available>
      at jdk.internal.org.jline.utils.NonBlockingInputStreamImpl.read(jdk.internal.le@19-internal/NonBlockingInputStreamImpl.java:139)
      - locked <0x00000000a2000368> (a jdk.internal.jshell.tool.ConsoleIOContext$1)
      at jdk.internal.org.jline.utils.NonBlockingInputStream.read(jdk.internal.le@19-internal/NonBlockingInputStream.java:62)
      at jdk.internal.org.jline.utils.NonBlocking$NonBlockingInputStreamReader.read(jdk.internal.le@19-internal/NonBlocking.java:168)
      at jdk.internal.org.jline.utils.NonBlockingReader.read(jdk.internal.le@19-internal/NonBlockingReader.java:57)
      at jdk.internal.org.jline.keymap.BindingReader.readCharacter(jdk.internal.le@19-internal/BindingReader.java:160)
      at jdk.internal.org.jline.keymap.BindingReader.readBinding(jdk.internal.le@19-internal/BindingReader.java:110)
      at jdk.internal.org.jline.keymap.BindingReader.readBinding(jdk.internal.le@19-internal/BindingReader.java:61)
      at jdk.internal.org.jline.reader.impl.LineReaderImpl.doReadBinding(jdk.internal.le@19-internal/LineReaderImpl.java:923)
      at jdk.internal.org.jline.reader.impl.LineReaderImpl.readBinding(jdk.internal.le@19-internal/LineReaderImpl.java:956)
      at jdk.internal.jshell.tool.ConsoleIOContext$2.readBinding(jdk.jshell@19-internal/ConsoleIOContext.java:173)
      at jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(jdk.internal.le@19-internal/LineReaderImpl.java:651)
      at jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(jdk.internal.le@19-internal/LineReaderImpl.java:468)
      at jdk.internal.jshell.tool.ConsoleIOContext.readLine(jdk.jshell@19-internal/ConsoleIOContext.java:249)
      at jdk.internal.jshell.tool.JShellTool.getInput(jdk.jshell@19-internal/JShellTool.java:1281)
      at jdk.internal.jshell.tool.JShellTool.run(jdk.jshell@19-internal/JShellTool.java:1215)
      at jdk.internal.jshell.tool.JShellTool.start(jdk.jshell@19-internal/JShellTool.java:1001)
      at jdk.internal.jshell.tool.JShellToolBuilder.start(jdk.jshell@19-internal/JShellToolBuilder.java:261)
      at jdk.internal.jshell.tool.JShellToolProvider.main(jdk.jshell@19-internal/JShellToolProvider.java:120)

      "Reference Handler" #2 daemon prio=10 os_prio=0 cpu=1.04ms elapsed=23.72s tid=0x00007f159c1babc0 nid=115926 waiting on condition [0x00007f1529302000]
         java.lang.Thread.State: RUNNABLE
      at java.lang.ref.Reference.waitForReferencePendingList(java.base@19-internal/Native Method)
      at java.lang.ref.Reference.processPendingReferences(java.base@19-internal/Reference.java:253)
      at java.lang.ref.Reference$ReferenceHandler.run(java.base@19-internal/Reference.java:215)

      "Finalizer" #3 daemon prio=8 os_prio=0 cpu=0.35ms elapsed=23.72s tid=0x00007f159c1bc180 nid=115927 in Object.wait() [0x00007f1529201000]
         java.lang.Thread.State: WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <0x00000000a00002e8> (a java.lang.ref.ReferenceQueue$Lock)
      at java.lang.ref.ReferenceQueue.remove(java.base@19-internal/ReferenceQueue.java:155)
      - locked <0x00000000a00002e8> (a java.lang.ref.ReferenceQueue$Lock)
      at java.lang.ref.ReferenceQueue.remove(java.base@19-internal/ReferenceQueue.java:176)
      at java.lang.ref.Finalizer$FinalizerThread.run(java.base@19-internal/Finalizer.java:183)

      "Signal Dispatcher" #4 daemon prio=9 os_prio=0 cpu=0.24ms elapsed=23.71s tid=0x00007f159c1c21d0 nid=115928 waiting on condition [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "Service Thread" #5 daemon prio=9 os_prio=0 cpu=0.20ms elapsed=23.71s tid=0x00007f159c1c36a0 nid=115929 runnable [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "Monitor Deflation Thread" #6 daemon prio=9 os_prio=0 cpu=0.24ms elapsed=23.71s tid=0x00007f159c1c4bb0 nid=115930 runnable [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "C2 CompilerThread0" #7 daemon prio=9 os_prio=0 cpu=527.71ms elapsed=23.71s tid=0x00007f159c1c6730 nid=115931 waiting on condition [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE
         No compile task

      "C1 CompilerThread0" #19 daemon prio=9 os_prio=0 cpu=216.87ms elapsed=23.71s tid=0x00007f159c1c7db0 nid=115932 waiting on condition [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE
         No compile task

      "Sweeper thread" #25 daemon prio=9 os_prio=0 cpu=0.04ms elapsed=23.71s tid=0x00007f159c1c9330 nid=115933 runnable [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "Notification Thread" #26 daemon prio=9 os_prio=0 cpu=0.05ms elapsed=23.70s tid=0x00007f159c1fc300 nid=115936 runnable [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "Common-Cleaner" #27 daemon prio=8 os_prio=0 cpu=0.99ms elapsed=23.68s tid=0x00007f159c211a60 nid=115938 in Object.wait() [0x00007f15282d2000]
         java.lang.Thread.State: TIMED_WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <no object reference available>
      at java.lang.ref.ReferenceQueue.remove(java.base@19-internal/ReferenceQueue.java:155)
      - locked <0x00000000a0000628> (a java.lang.ref.ReferenceQueue$Lock)
      at jdk.internal.ref.CleanerImpl.run(java.base@19-internal/CleanerImpl.java:140)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)
      at jdk.internal.misc.InnocuousThread.run(java.base@19-internal/InnocuousThread.java:162)

      "Timer-0" #28 daemon prio=5 os_prio=0 cpu=0.10ms elapsed=23.68s tid=0x00007f159c213b60 nid=115939 in Object.wait() [0x00007f15281d1000]
         java.lang.Thread.State: TIMED_WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <0x00000000a00007e8> (a java.util.TaskQueue)
      at java.util.TimerThread.mainLoop(java.base@19-internal/Timer.java:563)
      - locked <0x00000000a00007e8> (a java.util.TaskQueue)
      at java.util.TimerThread.run(java.base@19-internal/Timer.java:516)

      "process reaper" #30 daemon prio=10 os_prio=0 cpu=0.17ms elapsed=23.53s tid=0x00007f159c302960 nid=115944 runnable [0x00007f15a3c9e000]
         java.lang.Thread.State: RUNNABLE
      at java.lang.ProcessHandleImpl.waitForProcessExit0(java.base@19-internal/Native Method)
      at java.lang.ProcessHandleImpl$1.run(java.base@19-internal/ProcessHandleImpl.java:147)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@19-internal/ThreadPoolExecutor.java:1136)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@19-internal/ThreadPoolExecutor.java:635)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "JDI Internal Event Handler" #34 daemon prio=5 os_prio=0 cpu=14.16ms elapsed=23.49s tid=0x00007f14cc0319d0 nid=115971 in Object.wait() [0x00007f15096b7000]
         java.lang.Thread.State: WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <no object reference available>
      at java.lang.Object.wait(java.base@19-internal/Object.java:338)
      at com.sun.tools.jdi.EventQueueImpl.removeUnfiltered(jdk.jdi@19-internal/EventQueueImpl.java:190)
      - locked <0x00000000a0000e80> (a com.sun.tools.jdi.EventQueueImpl)
      at com.sun.tools.jdi.EventQueueImpl.removeInternal(jdk.jdi@19-internal/EventQueueImpl.java:125)
      at com.sun.tools.jdi.InternalEventHandler.run(jdk.jdi@19-internal/InternalEventHandler.java:61)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "JDI Target VM Interface" #33 daemon prio=5 os_prio=0 cpu=16.02ms elapsed=23.49s tid=0x00007f14cc0375c0 nid=115972 runnable [0x00007f15095b6000]
         java.lang.Thread.State: RUNNABLE
      at sun.nio.ch.SocketDispatcher.read0(java.base@19-internal/Native Method)
      at sun.nio.ch.SocketDispatcher.read(java.base@19-internal/SocketDispatcher.java:47)
      at sun.nio.ch.NioSocketImpl.tryRead(java.base@19-internal/NioSocketImpl.java:258)
      at sun.nio.ch.NioSocketImpl.implRead(java.base@19-internal/NioSocketImpl.java:309)
      at sun.nio.ch.NioSocketImpl.read(java.base@19-internal/NioSocketImpl.java:347)
      at sun.nio.ch.NioSocketImpl$1.read(java.base@19-internal/NioSocketImpl.java:800)
      at java.net.Socket$SocketInputStream.read(java.base@19-internal/Socket.java:966)
      at java.net.Socket$SocketInputStream.read(java.base@19-internal/Socket.java:961)
      at com.sun.tools.jdi.SocketConnection.readPacket(jdk.jdi@19-internal/SocketConnection.java:82)
      - locked <0x00000000a00012e0> (a java.lang.Object)
      at com.sun.tools.jdi.TargetVM.run(jdk.jdi@19-internal/TargetVM.java:123)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "event-handler" #35 daemon prio=5 os_prio=0 cpu=8.29ms elapsed=23.48s tid=0x00007f159c307e80 nid=115973 in Object.wait() [0x00007f15098b9000]
         java.lang.Thread.State: WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <no object reference available>
      at java.lang.Object.wait(java.base@19-internal/Object.java:338)
      at com.sun.tools.jdi.EventQueueImpl.removeUnfiltered(jdk.jdi@19-internal/EventQueueImpl.java:190)
      - locked <0x00000000a0001e98> (a com.sun.tools.jdi.EventQueueImpl)
      at com.sun.tools.jdi.EventQueueImpl.remove(jdk.jdi@19-internal/EventQueueImpl.java:97)
      at com.sun.tools.jdi.EventQueueImpl.remove(jdk.jdi@19-internal/EventQueueImpl.java:83)
      at jdk.jshell.execution.JdiEventHandler.run(jdk.jshell@19-internal/JdiEventHandler.java:79)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "output reader" #36 daemon prio=5 os_prio=0 cpu=0.30ms elapsed=23.44s tid=0x00007f159c30db30 nid=115990 runnable [0x00007f15097b8000]
         java.lang.Thread.State: RUNNABLE
      at sun.nio.ch.SocketDispatcher.read0(java.base@19-internal/Native Method)
      at sun.nio.ch.SocketDispatcher.read(java.base@19-internal/SocketDispatcher.java:47)
      at sun.nio.ch.NioSocketImpl.tryRead(java.base@19-internal/NioSocketImpl.java:258)
      at sun.nio.ch.NioSocketImpl.implRead(java.base@19-internal/NioSocketImpl.java:309)
      at sun.nio.ch.NioSocketImpl.read(java.base@19-internal/NioSocketImpl.java:347)
      at sun.nio.ch.NioSocketImpl$1.read(java.base@19-internal/NioSocketImpl.java:800)
      at java.net.Socket$SocketInputStream.read(java.base@19-internal/Socket.java:966)
      at java.net.Socket$SocketInputStream.read(java.base@19-internal/Socket.java:961)
      at java.io.FilterInputStream.read(java.base@19-internal/FilterInputStream.java:79)
      at jdk.jshell.execution.DemultiplexInput.run(jdk.jshell@19-internal/DemultiplexInput.java:60)

      "Thread-1" #38 daemon prio=5 os_prio=0 cpu=222.19ms elapsed=23.37s tid=0x00007f159c3e6db0 nid=115995 waiting on condition [0x00007f15094b5000]
         java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park(java.base@19-internal/Native Method)
      - parking to wait for <0x00000000a007a880> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
      at java.util.concurrent.locks.LockSupport.park(java.base@19-internal/LockSupport.java:341)
      at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(java.base@19-internal/AbstractQueuedSynchronizer.java:506)
      at java.util.concurrent.ForkJoinPool.unmanagedBlock(java.base@19-internal/ForkJoinPool.java:3464)
      at java.util.concurrent.ForkJoinPool.managedBlock(java.base@19-internal/ForkJoinPool.java:3435)
      at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(java.base@19-internal/AbstractQueuedSynchronizer.java:1623)
      at java.util.concurrent.LinkedBlockingQueue.take(java.base@19-internal/LinkedBlockingQueue.java:435)
      at java.util.concurrent.ThreadPoolExecutor.getTask(java.base@19-internal/ThreadPoolExecutor.java:1062)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@19-internal/ThreadPoolExecutor.java:1122)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@19-internal/ThreadPoolExecutor.java:635)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "process reaper" #40 daemon prio=10 os_prio=0 cpu=1.83ms elapsed=22.94s tid=0x00007f159c647300 nid=116044 waiting on condition [0x00007f15280d0000]
         java.lang.Thread.State: TIMED_WAITING (parking)
      at jdk.internal.misc.Unsafe.park(java.base@19-internal/Native Method)
      - parking to wait for <0x00000000a0079fb0> (a java.util.concurrent.SynchronousQueue$TransferStack)
      at java.util.concurrent.locks.LockSupport.parkNanos(java.base@19-internal/LockSupport.java:252)
      at java.util.concurrent.SynchronousQueue$TransferStack.transfer(java.base@19-internal/SynchronousQueue.java:401)
      at java.util.concurrent.SynchronousQueue.poll(java.base@19-internal/SynchronousQueue.java:903)
      at java.util.concurrent.ThreadPoolExecutor.getTask(java.base@19-internal/ThreadPoolExecutor.java:1061)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@19-internal/ThreadPoolExecutor.java:1122)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@19-internal/ThreadPoolExecutor.java:635)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "Thread-3" #41 daemon prio=5 os_prio=0 cpu=1.39ms elapsed=22.94s tid=0x00007f159c64b600 nid=116045 runnable [0x00007f14734ed000]
         java.lang.Thread.State: RUNNABLE
      at java.io.FileInputStream.read0(java.base@19-internal/Native Method)
      at java.io.FileInputStream.read(java.base@19-internal/FileInputStream.java:228)
      at jdk.internal.org.jline.terminal.impl.AbstractPty$PtyInputStream.read(jdk.internal.le@19-internal/AbstractPty.java:73)
      at jdk.internal.org.jline.utils.NonBlockingInputStream.read(jdk.internal.le@19-internal/NonBlockingInputStream.java:62)
      at jdk.internal.jshell.tool.StopDetectingInputStream.lambda$setInputStream$0(jdk.jshell@19-internal/StopDetectingInputStream.java:74)
      at jdk.internal.jshell.tool.StopDetectingInputStream$$Lambda$355/0x0000000800dd68d0.run(jdk.jshell@19-internal/Unknown Source)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "null non blocking reader thread" #43 daemon prio=5 os_prio=0 cpu=0.15ms elapsed=22.78s tid=0x00007f159c678910 nid=116063 in Object.wait() [0x00007f1472ee6000]
         java.lang.Thread.State: WAITING (on object monitor)
      at java.lang.Object.wait(java.base@19-internal/Native Method)
      - waiting on <no object reference available>
      at java.lang.Object.wait(java.base@19-internal/Object.java:338)
      at jdk.internal.jshell.tool.StopDetectingInputStream.read(jdk.jshell@19-internal/StopDetectingInputStream.java:111)
      - locked <0x00000000a2000908> (a jdk.internal.jshell.tool.StopDetectingInputStream)
      at jdk.internal.org.jline.utils.NonBlockingInputStreamImpl.run(jdk.internal.le@19-internal/NonBlockingInputStreamImpl.java:216)
      at jdk.internal.org.jline.utils.NonBlockingInputStreamImpl$$Lambda$530/0x0000000800dfde40.run(jdk.internal.le@19-internal/Unknown Source)
      at java.lang.Thread.run(java.base@19-internal/Thread.java:828)

      "Attach Listener" #44 daemon prio=9 os_prio=0 cpu=0.17ms elapsed=0.10s tid=0x00007f1504000be0 nid=116383 waiting on condition [0x0000000000000000]
         java.lang.Thread.State: RUNNABLE

      "VM Thread" os_prio=0 cpu=8.31ms elapsed=23.72s tid=0x00007f159c1b78f0 nid=115925 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      V [libjvm.so+0xf21ec5] VM_PrintThreads::doit()+0x25
      V [libjvm.so+0xf225aa] VM_Operation::evaluate()+0xea
      V [libjvm.so+0xf23f18] VMThread::evaluate_operation(VM_Operation*)+0xb8
      V [libjvm.so+0xf245c7] VMThread::inner_execute(VM_Operation*)+0x3a7
      V [libjvm.so+0xf24877] VMThread::run()+0xb7
      V [libjvm.so+0xe99770] Thread::call_run()+0xc0
      V [libjvm.so+0xc37a08] thread_native_entry(Thread*)+0xd8

      "GC Thread#0" os_prio=0 cpu=39.19ms elapsed=23.73s tid=0x00007f159c066a10 nid=115920 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#1" os_prio=0 cpu=9.75ms elapsed=23.16s tid=0x00007f15180140e0 nid=116014 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#2" os_prio=0 cpu=0.48ms elapsed=23.15s tid=0x00007f151801b730 nid=116015 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#3" os_prio=0 cpu=11.09ms elapsed=23.15s tid=0x00007f151801c160 nid=116016 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#4" os_prio=0 cpu=24.95ms elapsed=23.15s tid=0x00007f151801ccc0 nid=116017 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#5" os_prio=0 cpu=0.58ms elapsed=23.15s tid=0x00007f151801d820 nid=116018 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#6" os_prio=0 cpu=35.58ms elapsed=23.15s tid=0x00007f151801e380 nid=116019 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#7" os_prio=0 cpu=13.88ms elapsed=22.98s tid=0x00007f151801b050 nid=116042 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "GC Thread#8" os_prio=0 cpu=12.97ms elapsed=22.92s tid=0x00007f1518021950 nid=116047 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Main Marker" os_prio=0 cpu=0.84ms elapsed=23.73s tid=0x00007f159c076ed0 nid=115921 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xba33] pthread_cond_wait+0xc3
      V [libjvm.so+0xbf1589] Monitor::wait_without_safepoint_check(long)+0x39
      V [libjvm.so+0x725fda] G1ConcurrentMarkThread::wait_for_next_cycle()+0x3a
      V [libjvm.so+0x7270bb] G1ConcurrentMarkThread::run_service()+0xdb
      V [libjvm.so+0x60be0b] ConcurrentGCThread::run()+0x1b
      V [libjvm.so+0xe99770] Thread::call_run()+0xc0
      V [libjvm.so+0xc37a08] thread_native_entry(Thread*)+0xd8

      "G1 Conc#0" os_prio=0 cpu=6.39ms elapsed=23.73s tid=0x00007f159c077f50 nid=115922 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#1" os_prio=0 cpu=1.74ms elapsed=23.05s tid=0x00007f152c000960 nid=116022 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#2" os_prio=0 cpu=1.23ms elapsed=23.05s tid=0x00007f152c001490 nid=116023 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#3" os_prio=0 cpu=2.04ms elapsed=23.05s tid=0x00007f152c001ff0 nid=116024 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#4" os_prio=0 cpu=1.28ms elapsed=23.05s tid=0x00007f152c002b50 nid=116025 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#5" os_prio=0 cpu=1.60ms elapsed=23.05s tid=0x00007f152c0036b0 nid=116026 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#6" os_prio=0 cpu=1.61ms elapsed=23.05s tid=0x00007f152c004210 nid=116027 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#7" os_prio=0 cpu=2.00ms elapsed=23.05s tid=0x00007f152c005160 nid=116028 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#8" os_prio=0 cpu=1.58ms elapsed=23.05s tid=0x00007f152c0060b0 nid=116029 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#9" os_prio=0 cpu=1.26ms elapsed=23.05s tid=0x00007f152c007000 nid=116030 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#10" os_prio=0 cpu=1.61ms elapsed=23.05s tid=0x00007f152c007f50 nid=116031 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#11" os_prio=0 cpu=1.52ms elapsed=23.05s tid=0x00007f152c008ea0 nid=116032 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#12" os_prio=0 cpu=1.17ms elapsed=23.05s tid=0x00007f152c009df0 nid=116033 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#13" os_prio=0 cpu=1.88ms elapsed=23.05s tid=0x00007f152c00ad40 nid=116034 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#14" os_prio=0 cpu=1.31ms elapsed=23.05s tid=0x00007f152c00bc90 nid=116035 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Conc#15" os_prio=0 cpu=1.52ms elapsed=23.05s tid=0x00007f152c00cbe0 nid=116036 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Refine#0" os_prio=0 cpu=0.03ms elapsed=23.73s tid=0x00007f159c1881d0 nid=115923 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xdb39] do_futex_wait.constprop.1+0x29

      "G1 Service" os_prio=0 cpu=0.72ms elapsed=23.73s tid=0x00007f159c189290 nid=115924 runnable
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xbde2] pthread_cond_timedwait+0x132
      V [libjvm.so+0xbf1589] Monitor::wait_without_safepoint_check(long)+0x39
      V [libjvm.so+0x77d208] G1ServiceThread::wait_for_task()+0xf8
      V [libjvm.so+0x77d600] G1ServiceThread::run_service()+0x20
      V [libjvm.so+0x60be0b] ConcurrentGCThread::run()+0x1b
      V [libjvm.so+0xe99770] Thread::call_run()+0xc0
      V [libjvm.so+0xc37a08] thread_native_entry(Thread*)+0xd8

      "VM Periodic Task Thread" os_prio=0 cpu=4.05ms elapsed=23.71s tid=0x00007f159c1fddf0 nid=115937 waiting on condition
      Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
      C [libpthread.so.0+0xbde2] pthread_cond_timedwait+0x132
      V [libjvm.so+0xbf1589] Monitor::wait_without_safepoint_check(long)+0x39
      V [libjvm.so+0xc07015] WatcherThread::sleep() const+0xa5
      V [libjvm.so+0xc070e5] WatcherThread::run()+0x35
      V [libjvm.so+0xe99770] Thread::call_run()+0xc0
      V [libjvm.so+0xc37a08] thread_native_entry(Thread*)+0xd8

      JNI global refs: 28, weak refs: 0

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              Assignee:
              yyang Yi Yang
              Reporter:
              yyang Yi Yang
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                Created:
                Updated: