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Interrupts and strange ProcessExplorer Behaviour

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guguma View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote guguma Quote  Post ReplyReply Direct Link To This Post Topic: Interrupts and strange ProcessExplorer Behaviour
    Posted: 22 May 2013 at 10:30am
Dear All,

I am running Windows 7 Professional 64-bit on an ASUS UL50VT laptop (I will write in detail why this laptop model is a little strange, please see information after the dash line).

Long story short process explorer reports and almost constant CPU usage by Interrupts/DPC's of 20%. For a snapshot of ProcessExplorer please see the image in the provided link:

https://dl.dropboxusercontent.com/u/14021697/procexp.png


So I ran xperf (for about 2 minutes), but to my surprise neither DPC's nor Interrupts show a CPU use close to 20%. Please see the etl file in the link provided:

https://dl.dropboxusercontent.com/u/14021697/interr.etl


So what is going on here, I am utterly confused, and your help is greatly appreciated. If you are interested in the history of the issue and what I have tried before please see additional information below.

ADDITIONAL INFORMATION
----------------------------------------------------------------

I must confess that before posting here I have done these tests before, and in the etl files I could see my nvidia drivers being problematic. UL50VT has 2 display adapters One Intel and an NVIDIA G210M, and uses an ASUS proprietary technology to switch between the 2 and ASUS stopped driver support for these in 2009.

Some people managed to build custom driver packages and I was using one of those. When I had that driver package I did run the same routine tests and the nvidia drivers were problematic (it showed clearly in the etl file).

Now I have gone back to the official ASUS drivers, and when I saw process explorer reporting similar interrupt use I tried a billion things to fix the issue. I disabled usb ports from the bios, and network adapters and audio drivers, but to no awail. I tried a bunch of drivers for all components (all official ASUS drivers). A couple of full reinstalls of the system but this issue with interrupts was not resolved.

But now that xperf does not show any interrupt/dpc use but process explorer reporting almost constant %20 use I am seriously confused and your help is greatly appreciated.
-----------------------------------------------------------------------

Best,

-Guguma

Edited by guguma - 22 May 2013 at 10:32am
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MagicAndre1981 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MagicAndre1981 Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2013 at 4:17pm
you have graphic issues:

Total = 5059 for module dxgkrnl.sys
Elapsed Time, >     4096 usecs AND <=     8192 usecs,    268, or   5.30%
Total,                                                  5059

You use an old driver version:

nvlddmkm.sys 8.15.11.8688.

Use this driver:

http://www.nvidia.com/object/notebook-win8-win7-64bit-320.14-beta-driver.html

Also install the Windows 7 Sp1!
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guguma View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote guguma Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2013 at 5:10pm
Dear MagicAndre1981,

I understand there are graphic issues, the problem is that this driver:

http://www.nvidia.com/object/notebook-win8-win7-64bit-320.14-beta-driver.html

is not compatible with my computer.

As I said in the Additional Information, ASUS has a special controller between the intel and nvidia card, making official nvidia drivers not even install.

To overcome this issue some people did release supposedly stable 260.xx drivers, I have tried them and they make the issue even worse.

The strange thing is that I have been using this laptop for 3-4 years and did quite a lot of re-installs. ProcessExplorer was always a must in the system, and this is the first time I am seeing this issue.

Could it be a Directx update that is causing the issue? If so how can I use and older version of Directx?

Best,

Guguma
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guguma View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote guguma Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2013 at 10:24pm
So I have Installed Service Pack 1 but there is absolutely no effect. Any more ideas?
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