High cpu usage from WmiPrvSE.exe (trace attached)

[rgmuir]

I've read through various posts, but nothing seems to match exactly the situation I'm seeing.

I have a Sony Vaio laptop running Windows 8.1 64 bit which is showing a constant 20% cpu usage from WmiPrvSE.

I don't see instructions on how to determine what is being loaded by the WMI Provider Host from the trace file.

I've uploaded the trace file here: https://drive.google.com/file/d/0B39RE7vcQxdPMHYwbGdSMGJHeEk/edit?usp=sharing

Any help with specifics or a pointer to how I can read the etl file to determine what exactly is being loaded and using so many cpu cycles would be highly appreciated.

Rob.

[MagicAndre1981]

You need to run this .cmd to capture WMI data:

xperf -on PROC_THREAD+LOADER+PROFILE+INTERRUPT+DPC+DISPATCHER -stackwalk profile -BufferSize 1024 -MaxFile 512 -FileMode Circular -f Kernel.etlxperf -start WMILogger -on Microsoft-Windows-WMI-Activity -BufferSize 1024 -f WMI.etlecho At this point, the test pass should be performed.pauseXperf -stopXperf -stop WMILoggerXperf -merge WMI.etl kernel.etl WMItracing.etldel WMI.etldel kernel.etl

Zip and upload the WMItracing.etl

Also use the WPT from the Windows 8.1 SDK in Windows 8.1:

http://msdn.microsoft.com/en-US/windows/desktop/bg162891

Edited December 1, 2013 by MagicAndre1981

[rgmuir]

Thanks very much, Andre.

I've followed your script with the Windows 8.1 SDK and uploaded the zipped log here:

https://drive.google.com/file/d/0B39RE7vcQxdPN1p5eWJudlhqem8/edit?usp=sharing

I also tried the voodoo steps of stopping and starting the WMI service, then restarting the machine. The CPU usage dropped from 20% to about 7%. Better, but still enough to quickly drain the battery on a laptop.

Please let me know if anything jumps out as causing the high usage.

Regards,

Rob.

[MagicAndre1981]

I can't really see the cause. Try to capture 2 new traces later this day.