성태의 닷넷 이야기
홈 주인
모아 놓은 자료
프로그래밍
질문/답변
사용자 관리
사용자
메뉴
Digital Stories
방명록
최근 덧글
[정성태] Get Started with Milvus Vector DB i...
[정성태] cyberark/PipeViewer - A tool that...
[정성태] WinForms in a 64-Bit world – our st...
[정성태] 예제에서 SELECT_SQL도 내부적으로는 SqlCommand/...
[victor] SELECT_LINQ SELECT_SQL 같은 쿼리인...
[victor] 답변 갑사합니다. 예외(Exception)가 났습니다. ...
[정성태] 일단, 위의 방식대로 하면 예외(Exception) 없이 잘 동...
[정성태] Windows 10 (버전 1809)에 이런 기능이 ^^ 추가되...
[정성태] pde windbg extension ; https://lea...
[정성태] // GetEnumerator extensions for Ran...
글쓰기
제목
이름
암호
전자우편
HTML
홈페이지
유형
기타
생각의 전환
부모글 보이기/감추기
내용
<div style='display: inline'> <div style='font-family: 맑은 고딕, Consolas; font-size: 20pt; color: #006699; text-align: center; font-weight: bold'>Windows 7 - Taskhost.exe CPU 점유 문제</div> <br /> 노트북의 CPU 100% 점유 문제 감지기(이름하여, CPU 쿨러)가 이상 현상을 보고하기 시작했습니다. 별다른 작업도 하고 있지 않은데, CPU 쿨러가 미친듯이 돌기 시작하는 것입니다.<br /> <br /> 작업관리자를 보니 taskhost.exe가 "(1 * 100) / 8"만큼의 CPU 점유율을 보이기 시작했습니다. 즉, <a target='_tab' href='http://www.sysnet.pe.kr/0/0/285'>8개 논리 스레드를 가진 시스템</a>이기 때문에 단일 스레드 하나가 무한 루프에 빠졌을 때와 동일한 CPU 사용률을 보이고 있는 것입니다. 재빠르게 작업관리자를 이용해서 덤프를 뜨고 (요즘 <a target='_tab' href='http://www.sysnet.pe.kr/2/0/991'>덤프 뜨는 재미</a>에 빠졌습니당. ^^) 약 5분 정도였을까... 시간이 지나니 다행히 문제를 발생시킨 taskhost.exe가 스스로 종료는 되었습니다.<br /> <br /> 그래도, 이런 현상이 또 발생할지도 몰라서 한번 검색을 해보니, 다음과 같은 글에서 해결책이 나왔습니다.<br /> <br /> <pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' > Taskhost.exe ; <a target='_tab' href='http://social.answers.microsoft.com/Forums/en-US/w7performance/thread/0882ab46-43ee-4d90-8404-6802f8f4f2cf'>http://social.answers.microsoft.com/Forums/en-US/w7performance/thread/0882ab46-43ee-4d90-8404-6802f8f4f2cf</a> </pre> <br /> 질문에 대한 답글 중에서 2개가 의미있습니다.<br /> <br /> <div style='font-size: 12pt; font-family: 맑은 고딕, Consolas; color: #2211AA; text-align: left; font-weight: bold'>J.Mac</div><br /> <br /> <div style='BACKGROUND-COLOR: #ccffcc; padding: 10px 10px 5px 10px; MARGIN: 0px 10px 10px 10px; FONT-FAMILY: 맑은 고딕, Consolas, Verdana; COLOR: #005555'> Wow... so I have struggled most of the weekend with this :(<br /> <br /> And I think I have it narrowed down to the <b style='COLOR: blue'>Windows RAC</b> task... <br /> <br /> This after installing (and buying a few) multiple spyware and antivirus tools... I wonder if I should ask for reimbursement??<br /> <br /> Anyway - my cpu was being consumed by the <b style='COLOR: blue'>Windows Reliability Analysis Task</b> - the way that I narrowed it down to this was by installing process explorer and letting it show me what was actually running under taskhost.exe<br /> <br /> I then went into scheduled tasks and stopped the reliability analysis scheduled activity - and presto the taskhost.exe went away and processor utilization shot down to essentially nothing.<br /> <br /> Anyway - that seemed to help me... maybe it will help you<br /> <br /> Not sure why it is trying to burn up so much cpu...<br /> </div><br /> <br /> <br /> <div style='font-size: 12pt; font-family: 맑은 고딕, Consolas; color: #2211AA; text-align: left; font-weight: bold'>Travis Vaske</div><br /> <br /> <div style='BACKGROUND-COLOR: #ccffcc; padding: 10px 10px 5px 10px; MARGIN: 0px 10px 10px 10px; FONT-FAMILY: 맑은 고딕, Consolas, Verdana; COLOR: #005555'> Here is how you fix it........<br /> <br /> Go to task manager end Taskhost.exe then quickly browse to <b style='COLOR: blue'>C:\ProgramData\Microsoft\RAC</b> before the process starts back up. <b style='COLOR: blue'>Delete all the files inside the subfolders and reboot the machine</b>. This will reset the Reliability database and end the curruption.<br /> </div><br /> <br /> 위의 답변을 확인했을 때는 이미 taskhost.exe가 종료되어서 테스트를 할 수 없었는데, 일단 "C:\ProgramData\Microsoft\RAC" 폴더에 있는 모든 파일을 지웠으니 다음에 또 이런 현상이 발생하는지 기다려봐야겠습니다.<br /> <br /> 참고로, 제 경우에도 Windows RAC 문제가 맞는 것 같습니다. 아래의 덤프 분석을 보면 RacEngn.dll이 포함되어 있는 데다, 콜스택에도 RacEngn이 보입니다.<br /> <br /> <pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' > 0:000> <b style='COLOR: blue'>~*kb</b> . 0 Id: 2984.263c Suspend: 0 Teb: 000007ff`fffde000 Unfrozen RetAddr : Args to Child : Call Site 000007fe`fd2b10ac : 000007fe`00000002 00000000`ff7a1303 00000000`000000ce 00000000`00000000 : ntdll!ZwWaitForSingleObject+0xa 00000000`ff7a216e : 00000000`000000cc 00000000`ff7aa57e 00000000`00000000 00000000`000000cc : KERNELBASE!WaitForSingleObjectEx+0x9c 00000000`ff7a1fb5 : 00000000`00000000 00000000`00000001 00000000`00000000 00000000`001ffa30 : taskhost+0x216e 00000000`ff7a2e4e : 00000000`00000000 00000000`00000000 00000000`001056d0 00000000`00106bf0 : taskhost+0x1fb5 00000000`76faf56d : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : taskhost+0x2e4e 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 1 Id: 2984.2b00 Suspend: 0 Teb: 000007ff`fffdc000 Unfrozen RetAddr : Args to Child : Call Site 00000000`770c9b47 : 00000000`00000003 00000000`00000000 00000000`771b4470 00000000`771b4470 : ntdll!ZwWaitForMultipleObjects+0xa 00000000`76faf56d : 00000000`00000000 00000000`00000000 00000000`00000000 0000034d`b751255d : ntdll!EtwTraceMessageVa+0xe07 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 2 Id: 2984.2f24 Suspend: 0 Teb: 000007ff`fffd6000 Unfrozen RetAddr : Args to Child : Call Site 00000000`770c90bb : 00000000`00000001 00000000`00000000 00000000`771b4298 00000000`00000000 : ntdll!ZwWaitForWorkViaWorkerFactory+0xa 00000000`76faf56d : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!EtwTraceMessageVa+0x37b 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 3 Id: 2984.2ad4 Suspend: 0 Teb: 000007ff`fffae000 Unfrozen RetAddr : Args to Child : Call Site 000007fe`fd2b10ac : 00000000`00000000 00000000`76fa6246 00000000`00000000 000007fe`fd2e260f : ntdll!ZwWaitForSingleObject+0xa *** ERROR: Symbol file could not be found. Defaulted to export symbols for RacEngn.dll - 000007fe`d7723c09 : 00000000`003ae620 00000000`003ae620 00000000`00000000 00000000`00000374 : KERNELBASE!WaitForSingleObjectEx+0x9c 000007fe`d773bf12 : 00000000`003ae338 00000000`00000000 00000000`002dc270 00000000`002dbff0 : <b style='COLOR: blue'>RacEngn+0x23c09</b> 00000000`76faf56d : 00000000`00000001 00000000`00000000 00000000`00badbad 00000000`00000004 : <b style='COLOR: blue'>RacEngn!DllGetClassObject+0xfafe</b> 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 4 Id: 2984.1850 Suspend: 0 Teb: 000007ff`fffac000 Unfrozen *** ERROR: Symbol file could not be found. Defaulted to export symbols for user32.dll - RetAddr : Args to Child : Call Site 00000000`76eac95e : 00000000`00000000 00000000`021cf988 00000000`00000000 00000000`000002b8 : user32!SfmDxSetSwapChainStats+0x1a *** ERROR: Symbol file could not be found. Defaulted to export symbols for ole32.dll - 000007fe`fd4cca7e : 00000000`04d1008c 00000000`00000000 000007fe`fd4e7850 00000000`00000000 : user32!GetMessageW+0x2a 000007fe`fd613bd7 : 00000000`01ec3a60 00000000`00000000 00000000`01ec3a60 000007fe`fd4eb226 : ole32!GetErrorInfo+0x16a 000007fe`fd4d203e : 00000000`01ec3a60 00000000`01ec1e90 00000000`00000000 00000000`00000000 : ole32!CoUnloadingWOW+0x117 000007fe`fd4d358a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ole32!CLSIDFromString+0xee6 00000000`76faf56d : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ole32!CLSIDFromString+0x2432 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 5 Id: 2984.1344 Suspend: 0 Teb: 000007ff`fffaa000 Unfrozen RetAddr : Args to Child : Call Site 000007fe`fd2b10ac : 00000000`035df9d0 00000000`035df940 00000004`00000004 00000000`000003a8 : ntdll!ZwWaitForSingleObject+0xa 000007fe`d7702111 : 000007fe`d7816f38 000007fe`d7816f38 00000000`00000000 00000000`0000011c : KERNELBASE!WaitForSingleObjectEx+0x9c 00000000`76faf56d : 00000000`00000001 00000000`00000000 00000000`00000000 00000000`00000000 : <b style='COLOR: blue'>RacEngn+0x2111</b> 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 6 Id: 2984.1704 Suspend: 0 Teb: 000007ff`fffa8000 Unfrozen RetAddr : Args to Child : Call Site 000007fe`fd2b10ac : 00000000`01eb6050 00000000`00080000 00000000`01eb6040 00000000`77101f05 : ntdll!ZwWaitForSingleObject+0xa 000007fe`d7722852 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`0000011c : KERNELBASE!WaitForSingleObjectEx+0x9c 00000000`76faf56d : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : <b style='COLOR: blue'>RacEngn+0x22852</b> 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 7 Id: 2984.2dd4 Suspend: 0 Teb: 000007ff`fffa6000 Unfrozen *** ERROR: Symbol file could not be found. Defaulted to export symbols for sqlceqp30.dll - RetAddr : Args to Child : Call Site 000007fe`d79a8570 : 00000000`0371f6a8 00000000`0369ac50 00000000`0369ac50 00000000`0369d9d8 : sqlceqp30!DllCanUnloadNow+0x6c63b 000007fe`d79c7a67 : 00000000`036962d8 00000000`0369da30 00000000`0369da30 000007fe`d7976b8e : sqlceqp30!DllCanUnloadNow+0x6c0a8 000007fe`d7962af2 : 00000000`02c04500 00000000`0369da30 00000000`0036c318 00000000`02c4e758 : sqlceqp30!DllCanUnloadNow+0x8b59f 000007fe`d795d0aa : 00000000`0369da28 00000000`0369da28 00000000`02c045b8 00000000`0036c318 : sqlceqp30!DllCanUnloadNow+0x2662a 000007fe`d79d2241 : 00000000`00000001 00000000`00000000 00000000`036961f0 000007fe`e0f80967 : sqlceqp30!DllCanUnloadNow+0x20be2 000007fe`d7979192 : 00000000`02ec6601 000007fe`e0f38400 00000000`00000000 00000000`0371f818 : sqlceqp30!DllCanUnloadNow+0x95d79 000007fe`d79a8c87 : 00000000`00367398 00000000`0036c318 00000000`02c4e718 00000000`0371f860 : sqlceqp30!DllCanUnloadNow+0x3ccca 000007fe`d79a8570 : 00000000`00000000 00000000`0369ac80 00000000`036957d8 00000000`0371fb90 : sqlceqp30!DllCanUnloadNow+0x6c7bf 000007fe`d79cc3f6 : 00000000`00000000 00000000`0371f980 00000000`00000001 00000000`0371fb90 : sqlceqp30!DllCanUnloadNow+0x6c0a8 000007fe`d7962042 : 00000000`036960f8 00000000`00000000 00000000`00000001 000007fe`e0f724e9 : sqlceqp30!DllCanUnloadNow+0x8ff2e 000007fe`d7962af2 : 00000000`0371fa00 00000000`0036c318 00000000`0369d940 00000000`02c4daf8 : sqlceqp30!DllCanUnloadNow+0x25b7a 000007fe`d795d0aa : 00000000`0369d938 00000000`02c320a8 00000000`00000008 00000000`0036c318 : sqlceqp30!DllCanUnloadNow+0x2662a 000007fe`d79d368d : 00000000`00000001 00000000`00000000 00000000`00367c20 00000000`0371fad8 : sqlceqp30!DllCanUnloadNow+0x20be2 000007fe`d79d5e27 : 00000000`00000000 00000000`0036c301 00000000`0036c318 00000000`0371fb50 : sqlceqp30!DllCanUnloadNow+0x971c5 000007fe`d79401f7 : 00000000`0000005f 00000000`0369d938 00000000`0371fb80 00000000`002f3630 : sqlceqp30!DllCanUnloadNow+0x9995f *** ERROR: Symbol file could not be found. Defaulted to export symbols for sqlceoledb30.dll - 000007fe`e4310f28 : 00000000`02c4d898 00000000`02ed93c8 00000000`0371fb88 00000000`0371fb80 : sqlceqp30!DllCanUnloadNow+0x3d2f 000007fe`d770b370 : 00000000`00000000 00000000`00000000 000007fe`d78187f8 00000000`00000000 : sqlceoledb30!DllCanUnloadNow+0xf40 000007fe`d77d007e : 000007fe`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : <b style='COLOR: blue'>RacEngn+0xb370</b> 000007fe`d77ceffb : 00000000`00000000 00000000`0371fed8 ffffffff`fffffffe 000007fe`d786c5d0 : <b style='COLOR: blue'>RacEngn!DllUnregisterServer+0xe546</b> 000007fe`d775446f : 00000000`003ae2e0 00000000`4d4e9b50 00000000`4d4e9b50 000007fe`d786c210 : <b style='COLOR: blue'>RacEngn!DllUnregisterServer+0xd4c3</b> 8 Id: 2984.2bcc Suspend: 0 Teb: 000007ff`fffa4000 Unfrozen RetAddr : Args to Child : Call Site 00000000`76ea899e : 00000000`00000004 00000000`00000000 00160006`000207db 00000259`0036002e : user32!SfmDxSetSwapChainStats+0x1a *** ERROR: Symbol file could not be found. Defaulted to export symbols for sqlcese30.dll - 000007fe`e0f8e7d0 : 00000000`00000000 00000000`00000004 00000000`00000000 00000000`00000000 : user32!GetMessageA+0x4e 00000000`76faf56d : 00000000`00000000 00000000`00000001 01cbc64f`c0796b90 01cbc64f`c096b790 : sqlcese30!InitSerialization+0x60c4 00000000`770e3021 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21 0:000> <b style='COLOR: blue'>lm</b> start end module name 00000000`71680000 00000000`71683000 sfc (deferred) ...[생략]... 00000000`770b0000 00000000`7725b000 ntdll (export symbols) ntdll.dll 00000000`77280000 00000000`77283000 normaliz (deferred) 00000000`ff7a0000 00000000`ff7b4000 taskhost (no symbols) 000007fe`d7700000 000007fe`d7880000 <b style='COLOR: blue'>RacEngn (export symbols) RacEngn.dll</b> 000007fe`d7920000 000007fe`d79f1000 sqlceqp30 (export symbols) sqlceqp30.dll 000007fe`e0f30000 000007fe`e0fa4000 sqlcese30 (export symbols) sqlcese30.dll 000007fe`e4030000 000007fe`e40b5000 WinSATAPI (deferred) 000007fe`e4300000 000007fe`e4333000 sqlceoledb30 (export symbols) sqlceoledb30.dll ...[생략]... 000007fe`ff0a0000 000007fe`ff0bf000 sechost (deferred) 000007fe`ff1e0000 000007fe`ff3b7000 setupapi (deferred) Unloaded modules: 00000000`71e90000 00000000`71f2d000 MSVCR90.dll 000007fe`ed420000 000007fe`ed431000 MSOXMLMF.DLL </pre> </div>
첨부파일
스팸 방지용 인증 번호
3479
(왼쪽의 숫자를 입력해야 합니다.)