How to get the cause of high CPU usage by DPC / Interrupt
Posted 23 November 2011 - 12:57 PM
It's happened even with the western digital harddrive out.
I'll install SP2, remove every USB device and do another trace if you think that will help?
Posted 24 November 2011 - 01:53 PM
New DPC: http://img259.images...9/7034/dpc2.jpg
New Interupt: http://img406.images...2/interupt2.jpg
And I've private messaged you the new ETL file
Thank you so much for your insight on this issue. Rarely do I ever get free help from someone I am a stranger to
Posted 24 November 2011 - 05:32 PM
some spikes are only caused by DPCs:
Total = 32336 for module ndis.sys
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 1, or 0.00%
Total = 14752 for module ataport.SYS
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 2, or 0.01%
Total = 1353 for module acpi.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 13, or 0.96%
So ACPI causes the spikes which causes your issues. Try a different power plan and update the BIOS of your laptop.
Posted 24 November 2011 - 06:31 PM
I've already updated the BIOS (The Dell website had the same version I had already installed though, but I installed it anyway) and switched from "dell recommended" power to "maximum power" or whatever it's called. This was prior to that last trace.
Do you have any other suggestions? I'm going to try reformatting and reinstalling windows but if it's a BIOS problem I don't think that will help
Posted 29 November 2011 - 01:35 PM
I even succeeded to run xperf under WinXP (this is something I wanted to share with the community to give something back):
- first I extracted "xperf.exe" and "xperfctl.dll" from the "wpt_x86.msi" (you can use 7zip to do this)
- i copied this to a temporary folder
- i started a dos box and changed to that folder
- i ran the xperf logging like described and stopped it like described
I did NOT succeed viewing/debugging the etl-file in WinXP, but: I just copied the "*.etl" to a Win7 computer (where I have a normal wpt-Installation running) and doubleclicked the *.etl-file to find results...
It seems to work and I could identify a troublemaker on the WinXP machine (see attachmed file, etl was created with xperf in WinXP and diagnose ran in xperfview@Win7, thats why there's the aero window style).
Number of downloads: 10
So thank you for this thread and I hope someone could benefit from my WinXP-trials with this tool...
Posted 02 December 2011 - 02:53 AM
Would it be easier if I just PM you my scan to look at?
Many thanks for any help you can provide.
This post has been edited by BearandNeets: 02 December 2011 - 03:02 AM
Posted 04 December 2011 - 07:31 PM
Can anyone help? It causes ripping and popping audio wise in anything cpu intensive like skyrim or deus ex...
Bloodycpu copy.jpg (308.78K)
Number of downloads: 9
Posted 05 December 2011 - 05:53 AM
If this doesn't help, compress and upload the trace to mediafire.com and post a link here.
Posted 20 December 2011 - 09:11 AM
The ntoskrnl.exe seems to have some high values.
In Process Explorer I do see a 5-6% CPU usage for Intrerrupts.
I do have a Intel i7 @ 2.0Ghz and 12gig of ram.
What happens? My mouse starts to slug.
Number of downloads: 8
This post has been edited by h3x00r: 20 December 2011 - 09:11 AM
Posted 12 January 2012 - 09:42 AM
Posted 16 January 2012 - 10:40 PM
Posted 17 January 2012 - 03:58 PM
ATA Channel 0
ATA Channel 1
ATA Channel 3
ATA Channel 4
ATA Channel 5
Intel ® 6 Series/C200 Series Chipset Family 6 Port SATA AHCI Controller - 1C02
I'm not sure if the above has anything to do with the problem, but figured I'd list it anyway.
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