asp.net – 如何找到ThreadPool工作线程正在做什么？

2023年8月30日 167次阅读

我在w3wp.exe中拥有100％的CPU利用率,CPU的前3个线程如下所示

当我切换到其中一个有问题的线程时(例如18)我在尝试走动callstack时会得到以下错误,所以我认为它只是非托管代码而且“k”和“dumpstack”也在下面

所以我的问题是如何找出在这些Theadpool工作线程上占用所有CPU的内容？

    0:018> !runaway
     User Mode Time
      Thread       Time
      15:12a4      0 days 0:13:15.359
      18:830       0 days 0:10:49.046
      17:1084      0 days 0:10:47.343
      12:fc        0 days 0:00:36.828
    ...

    0:018> !threadpool
    CPU utilization 100%
    Worker Thread: Total: 3 Running: 0 Idle: 3 MaxLimit: 100 MinLimit: 1
    Work Request in Queue: 6
    --------------------------------------
    Number of Timers: 8
    --------------------------------------
    Completion Port Thread:Total: 1 Free: 1 MaxFree: 2 CurrentLimit: 0 MaxLimit: 100 MinLimit: 1


    0:018> !threads 
    ThreadCount: 10
    UnstartedThread: 0
    BackgroundThread: 10
    PendingThread: 0
    DeadThread: 0
    Hosted Runtime: no
                                          PreEmptive   GC Alloc           Lock
           ID OSID ThreadOBJ    State     GC       Context       Domain   Count APT Exception
       7    1 1078 016eced8      8220 Enabled  00000000:00000000 016e84d0     0 Ukn
      12    2   fc 016fb0c8      b220 Enabled  00000000:00000000 016e84d0     0 MTA (Finalizer)
      10    3 1148 01717b60   880a220 Enabled  00000000:00000000 016e84d0     0 MTA (Threadpool Completion Port)
      13    4  680 0171dad8    80a220 Enabled  00000000:00000000 016e84d0     0 MTA (Threadpool Completion Port)
      14    5  9b8 0171e470      1220 Enabled  00000000:00000000 016e84d0     0 Ukn
      15    6 12a4 017629f0   180b220 Enabled  00000000:00000000 016e84d0     0 MTA (Threadpool Worker)
       3    7 1188 016ef888       220 Enabled  00000000:00000000 016e84d0     0 Ukn
      17    8 1084 003085e8   180b220 Enabled  00000000:00000000 016e84d0     0 MTA (Threadpool Worker)
      18    9  830 03e433b8   180b220 Enabled  00000000:00000000 016e84d0     0 MTA (Threadpool Worker)
      19    a  f3c 03e79448       220 Enabled  00000000:00000000 016e84d0     0 Ukn

0:018> !clrstack
OS Thread Id: 0x830 (18)
Failed to start stack walk: 80004005

0:018> k
ChildEBP RetAddr  
077ef7a4 76630a91 ntdll!ZwWaitForSingleObject+0x15
077ef810 75711194 KERNELBASE!WaitForSingleObjectEx+0x98
077ef828 6ec25497 kernel32!WaitForSingleObjectExImplementation+0x75
077ef86c 6ec253e3 mscorwks!PEImage::LoadImage+0x1af
077ef8bc 6ec25402 mscorwks!CLREvent::WaitEx+0x117
077ef8d0 6ec8b75f mscorwks!CLREvent::Wait+0x17
077ef950 6ec8bbed mscorwks!ThreadpoolMgr::SafeWait+0x73
077ef9b4 6ed8305a mscorwks!ThreadpoolMgr::WorkerThreadStart+0x11c
077efc58 7571339a mscorwks!Thread::intermediateThreadProc+0x49
077efc64 77559ef2 kernel32!BaseThreadInitThunk+0xe
077efca4 77559ec5 ntdll!__RtlUserThreadStart+0x70
077efcbc 00000000 ntdll!_RtlUserThreadStart+0x1b

0:018> !dumpstack
OS Thread Id: 0x830 (18)
Current frame: ntdll!ZwWaitForSingleObject+0x15
ChildEBP RetAddr  Caller,Callee
077ef7a4 76630a91 KERNELBASE!WaitForSingleObjectEx+0x98, calling ntdll!ZwWaitForSingleObject
077ef810 75711194 kernel32!WaitForSingleObjectExImplementation+0x75, calling KERNELBASE!WaitForSingleObjectEx
077ef828 6ec25497 mscorwks!PEImage::LoadImage+0x1af
077ef854 6eea07a9 mscorwks!UM2MDoADCallBack+0x98, calling mscorwks!_EH_epilog3
077ef86c 6ec253e3 mscorwks!CLREvent::WaitEx+0x117, calling mscorwks!PEImage::LoadImage+0x180
077ef89c 6ec243ea mscorwks!UnsafeEELeaveCriticalSection+0x25, calling mscorwks!DECTHREADNONHOSTLOCKCOUNT
077ef8a8 6ec243ab mscorwks!CrstBase::Leave+0x8c, calling mscorwks!UnsafeEELeaveCriticalSection
077ef8bc 6ec25402 mscorwks!CLREvent::Wait+0x17, calling mscorwks!CLREvent::WaitEx
077ef8d0 6ec8b75f mscorwks!ThreadpoolMgr::SafeWait+0x73, calling mscorwks!CLREvent::Wait
077ef8f8 6ec2d529 mscorwks!GCHolder<1,0,1>::GCHolder<1,0,1>+0x29, calling mscorwks!Thread::DisablePreemptiveGC
077ef900 6ec299cc mscorwks!Thread::EnablePreemptiveGC+0xf, calling mscorwks!Thread::CatchAtSafePoint
077ef950 6ec8bbed mscorwks!ThreadpoolMgr::WorkerThreadStart+0x11c, calling mscorwks!ThreadpoolMgr::SafeWait
077ef9b4 6ed8305a mscorwks!Thread::intermediateThreadProc+0x49
077ef9d0 77559e83 ntdll!LdrInitializeThunk+0x1a, calling ntdll!NtContinue
077efc44 6ed83048 mscorwks!Thread::intermediateThreadProc+0x37, calling mscorwks!_alloca_probe_16
077efc58 7571339a kernel32!BaseThreadInitThunk+0xe
077efc64 77559ef2 ntdll!__RtlUserThreadStart+0x70
077efca4 77559ec5 ntdll!_RtlUserThreadStart+0x1b, calling ntdll!__RtlUserThreadStart

最佳答案 是的,这是非托管代码.

尝试分析您的代码,以确定代码的哪个部分正在吸收CPU.有一些免费的代码分析器,请查看此主题：
https://stackoverflow.com/questions/308816/any-good-free-net-profiler

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