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How to get the cause of high CPU usage by DPC / Interrupt Rate Topic: -----

#61 User is offline   NewestGuy 

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Posted 27 April 2010 - 03:27 PM

Can anyone help me cypher my interrupt storm analysis? Windows 7 Pro.

They look like Windows system drivers causing it, what should I do?


Posted Image




TIA

This post has been edited by NewestGuy: 27 April 2010 - 03:46 PM



#62 User is offline   MagicAndre1981 

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Posted 27 April 2010 - 05:40 PM

the dx.sys is related to your graphics card. Which graphics card do you use? make sure you are using the latest drivers! nDIS.sys is part of the networking functionality of Windows. So make sure that you use the latest network card drivers. The 3rd driver belongs to your sound card. Which one do you use? The 4th driver is the USB port driver. Have you installed the chipset drivers for your mainboard? which USb devices do you use?

#63 User is offline   NewestGuy 

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Posted 27 April 2010 - 06:11 PM

View PostMagicAndre1981, on 27 April 2010 - 05:40 PM, said:

the dx.sys is related to your graphics card. Which graphics card do you use? make sure you are using the latest drivers! nDIS.sys is part of the networking functionality of Windows. So make sure that you use the latest network card drivers. The 3rd driver belongs to your sound card. Which one do you use? The 4th driver is the USB port driver. Have you installed the chipset drivers for your mainboard? which USb devices do you use?


82945G Graphics

Realtek RTL8168C Gigabit ethernet adapter

ALC888 sound chip

I have tried newer drivers, but it seems to make the problem worse or no better, right now it may not do it for weeks, then when it does act up it seems like it does it for several days, rebooting several times today, then its back to normal. I have tried to notice if I am doing anything different on those istorm days, but cannot correlate anything, I don't do much but surf and email, analyze a few minidumps occasionally.

I shut down the PC every night.

Here are the full hardware specs
http://eu.msi.com/in...o=&prod_no=1674



All I can do I guess is try the latest drivers again, maybe there are newer versions.

I am beginning to think it is a Windows 7 bug running on this particular hardware, just won't play nice together.


Thanks for looking.
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#64 User is offline   MagicAndre1981 

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Posted 27 April 2010 - 06:24 PM

please compress the etl file as a zip archive and upload it and send me the link in a Personal Message.

#65 User is offline   NewestGuy 

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Posted 27 April 2010 - 06:50 PM

Done.

Thanks.

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#66 User is offline   MagicAndre1981 

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Posted 29 April 2010 - 07:57 AM

View PostNewestGuy, on 27 April 2010 - 06:11 PM, said:

right now it may not do it for weeks, then when it does act up it seems like it does it for several days, rebooting several times today, then its back to normal. I have tried to notice if I am doing anything different on those istorm days, but cannot correlate anything, I don't do much but surf and email, analyze a few minidumps occasionally.


I don't see anything new in the trace which helps you. Please Contact the MSI support and tell them about it.

#67 User is offline   NewestGuy 

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Posted 29 April 2010 - 10:17 AM

Thanks for looking, I guess I will live with it.

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#68 User is offline   MagicAndre1981 

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Posted 29 April 2010 - 03:56 PM

maybe cluberti has an idea, but I think it may be an hardware issue.

#69 User is offline   chazzi 

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Posted 04 May 2010 - 10:24 AM

View PostMagicAndre1981, on 25 April 2010 - 06:16 AM, said:

What's your hardware? Please make sure you're using the latest BIOS and chipset drivers.


Hi! Sorry for the slow response, been away.
I've got the latest chipset drivers but I'm very unsure about the BIOS.

I'm running: Gigabyte p35c-ds3r rev 2.1
so i've been checking around on gigabytes site but the only BIOS related things are helping programs.
No direct updates / new versions...

please help :=)

#70 User is offline   MagicAndre1981 

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Posted 04 May 2010 - 02:20 PM

Are you using Version F12?

http://www.gigabyte....&ver=#anchor_os

Are you using the latest drivers?

http://www.gigabyte....64bit#anchor_os

#71 User is offline   chazzi 

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Posted 06 May 2010 - 11:38 AM

View PostMagicAndre1981, on 04 May 2010 - 02:20 PM, said:

Are you using Version F12?

http://www.gigabyte....&ver=#anchor_os

Are you using the latest drivers?

http://www.gigabyte....64bit#anchor_os


I was running F8 :P

downloading F12 now

edit..couldnt find a F12 that works with 64bit =/
contacted gigabyte about it though

This post has been edited by chazzi: 06 May 2010 - 11:49 AM


#72 User is offline   Morgoe 

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Posted 06 May 2010 - 09:44 PM

I followed this and got an Unknown process with a bunch of functions like 0x85f9aa18 taking up a lot of CPU Usage... need help deciphering this :/ I tried PMing you MagicAndre but your inbox is full. Here's a capture tho:
Posted Image

#73 User is offline   cluberti 

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Posted 07 May 2010 - 08:20 AM

The unknown module, if it has an offset starting at 0x8xxxxxxx, is a kernel mode driver.

#74 User is offline   MagicAndre1981 

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Posted 07 May 2010 - 08:56 AM

@cluberti

How can we detect which driver it is?

#75 User is offline   Morgoe 

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Posted 07 May 2010 - 11:31 AM

View Postcluberti, on 07 May 2010 - 08:20 AM, said:

The unknown module, if it has an offset starting at 0x8xxxxxxx, is a kernel mode driver.


The reason I reached this website was because a process called System (description: NT Kernel & System) was using around 30% of my CPU during really CPU intensive parts of work, meaning my computer locked up or ran really slow. Only been happening in the last week or so (I reformatted a couple months ago to get rid of the W7 RC) :/ running W7 32bit, not sure if this helps.

#76 User is offline   Nukkels 

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Posted 09 May 2010 - 10:46 PM

I've only noticed this happening in the last week or so and the only thing I've done since then was move house. The only difference was that I used my phone as a modem for the first time ever - a lot of googling for the last few days has led me here but so far there are dozens of theories and no confirmed solutions. In my case, this is quite random. The process called 'System' (description NT Kernel and System) randomly seems to max out one core of the CPU then stops after a random amount of time. There's nothing in the event log for when this occurs.

I've run all the malware, AV, etc scans. Almost everyone with this problem that has reformatted and done a clean install says that the problem persists which indicates either hardware or a root kit. I've run 14 hours of memtest which came back clean and I've disabled my wireless card. Nothing has helped.

One thing that is interesting which I have found in all my research is that it may be related to IRQ settings. The reason I say this is that one time it occurred was while playing a game and the sound from my Creative SB X-FI went into a very short loop (about 50-100ms). There has also been a lot of talk about Interrupts, USB devices and hardware conflicts which all point at an IRQ problem. I have previously had my hardware working perfectly and then my sound card suddenly stop working for no reason and playing musical chairs with PCI cards changed the IRQ settings and fixed the problem. None of that explains the random nature of the current issue or why there has been a sudden increase in this problem recently.

My hardware is a Phenom II 965 with 4GB RAM, ATI 4850, X-FI Fatal1ty and TP-Link wireless-N card (can't remember the model number and I'm at work right now).

#77 User is offline   MagicAndre1981 

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Posted 10 May 2010 - 05:17 AM

you should run the xperf command I've posted here when the System- Process uses the CPU and look which driver causes the issue.

#78 User is offline   Resilient 

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Posted 12 May 2010 - 01:56 PM

Hi, I have come across this site trying to resolve the problem described in the first post. But, after downloading symbols, I am still getting an Module "Unknown" as the issue and I cant pin it down.

I have uploaded a rar here:

w2designs.dreamhosters.com/DPC_Interrupt.rar

which contains the elt file.

Thanks for any insight anyone can provide. I had daemon tools installed but it has been removed and I beleive these problems started before I had it installed anyway.

#79 User is offline   omenofthephoenix 

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Posted 13 May 2010 - 08:41 AM

Hi everyone,
I have spikes in CPU usage at fairly regular intervals when streaming video or playing a game full-screen.
I have done as MagicAndre has suggested and done a trace and found the USBport.sys is most likely the problem.
You mentioned updating chipset drivers, I think I did that but not sure if I did it correctly, I don't really understand the chipset thing.
Tried updating USB drivers, nVidia chipset? drivers and BIOS but still having problems.
Anyone able to help?
Let me know if there's any info you might need.

AMD athlon processors
ASUS M2N-VN DVI motherboard
nVidia chipset (nForce 560 and Southbridge nForce 630a) from CPU-Z
Windows 7 Pro 64bit

#80 User is offline   MagicAndre1981 

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Posted 13 May 2010 - 09:01 AM

yeah, install the latest nVIDIA nForce drivers.

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