I have 100% CPU utilization in w3wp.exe, and the top 3 threads by CPU are shown below
When I switch to one of the threads in question (for example, 18), I get an error below when I try to get through the call, so I assume this is unmanaged code, as well as the "k" and "dumpstack" below
So myquestion - how do you know what the entire processor consumes for these Theadpool workflows?
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
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