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High CPU usage, System Idle Process @ 99 ....????

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Anonymous
a b à CPUs
August 28, 2010 8:00:35 PM

Problem solved! I decided to reveal how given how many high CPU usage threads there are with people claiming System Idle Process was at 99%. Turned out to be a problem with hardware interrupts, which is either related to a driver you're using, or an actual hardware failure. Found it by using a program called Process Explorer to further inspect my processes. Used a program called RATT to actually see what was requesting so many CPU cycles. I checked the log RATT created for a column labeled IRS, which showed one file requesting a staggeringly higher amount of CPU cycles In particular hdaud.sys had to be disabled. Set the driver to disabled in Device Manager and the problem no longer persists. If it continues to persist after being disabled, then it is likely a hardware problem and need to reseat components and check their integrity through tools available from their manufacturer.
450 Watt PSU
2.0 Ghz AMD 3200+
Gigabyte K8N Mobo
512mb Corsair RAM x2
HIS Radeon 4670 AGP
XP Home SP3
Western Digital 200gb x2

Yesterday I woke up to find my computer was off, due to a power outage. CPU usage is now idling at around 30-50%. I checked the process tab in task manager to find that nothing was using my CPU, and that System Idle Process was at 99. This should mean nothing is using it, yet the high CPU usage remains.

Prior to this my computer would often idle at 2-4%, only reaching about 50-60% when running Call of Duty 4, and 80% when running Starcraft 2. I noticed in both games with the graphics on low that I was getting around 30 fps, whereas I normally get around a steady 60 with medium settings. Interestingly enough, my ping to nearby servers was up 20-30 ms which has never happened before. Ping increase was also present at speedtest.net

Scanned using Avira and Spybot, found nothing. Uninstalled Avira, checked with AVG, still nothing.

Checked MSConfig, most of startup is always unchecked, in services there wasn't anything new.

I run my OS partition very lean, so reformatting was a quick answer to try. Surprisingly it remained at a consistent medium usage despite the fresh install.

I've tried googling various terms and have come across many with CPU usage problems, but my situation hasn't been answered by anything I've found.

So I turn to minds more experienced than my own:

Is there a program I can use to break down CPU cycles more completely?
Is there a way to test if the power outage has partially damaged the CPU, without another computer to test it in?
Are there other plausible explanations for this behavior I'm unaware of?

Screenshots of my task manager processes and performance tab can be found here:

http://img413.imageshack.us/i/wtm1.png/

http://img690.imageshack.us/i/wtm2.png/so
a c 131 à CPUs
August 28, 2010 8:09:02 PM

Under the processes tab in the task manager, check the box that says "show processes from all users". Then sort by CPU usage. Ignore the "system idle process". It is always the leftover. ie, if your CPU usage is 30%, the system idle process will be 70%.
See what is using those CPU cycles.
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Anonymous
a b à CPUs
August 28, 2010 8:19:00 PM

Nothing different. This is the confusion. Everything looks normal from the processes view, my CPU is idle at 46% right now, with 10% usage by firefox shown in the processes tab with 'Show processes from all users' checked.
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Related resources
a c 131 à CPUs
August 28, 2010 8:21:37 PM

Quote:
Nothing different. This is the confusion. Everything looks normal from the processes view, my CPU is idle at 46% right now, with 10% usage by firefox shown in the processes tab with 'Show processes from all users' checked.

Can you show us a couple printscreens? A picture's worth a thousand words.
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a b à CPUs
August 28, 2010 8:23:07 PM

Sort your task manager by CPU usage (with processes from all users shown), then take a screenshot of it. That's probably the fastest way for us to see what's going on.
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Anonymous
a b à CPUs
August 28, 2010 8:31:10 PM

Let me know if you need more. Thx for taking a look! :D 




Included these with the OP as well.
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October 21, 2010 6:04:20 PM

quit same problem.
havnt played sc2 for 1.5month,
came back home,
updated all the patches,
and after i enter pass and login i get 98-99% cpu ussage from sc2.
pc on idle shows 98-99%.

updated newest video drivers, same.
amd 3400+
2gb 530 ram
gf 7600gt
previously worked good.
i gues its the problem somewhere with patch :/ 
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August 16, 2013 4:31:12 AM

Lol that System Idle process doesn't acutally exist and doesn't use your CPU at all... its something buggy and fake... nothing to worry about

i have it as well myself.. it doesn't affect my pc performance :D 
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October 25, 2013 12:43:30 PM

Anonymous said:
Problem solved! I decided to reveal how given how many high CPU usage threads there are with people claiming System Idle Process was at 99%. Turned out to be a problem with hardware interrupts, which is either related to a driver you're using, or an actual hardware failure. Found it by using a program called Process Explorer to further inspect my processes. Used a program called RATT to actually see what was requesting so many CPU cycles. I checked the log RATT created for a column labeled IRS, which showed one file requesting a staggeringly higher amount of CPU cycles In particular hdaud.sys had to be disabled. Set the driver to disabled in Device Manager and the problem no longer persists. If it continues to persist after being disabled, then it is likely a hardware problem and need to reseat components and check their integrity through tools available from their manufacturer.
450 Watt PSU
2.0 Ghz AMD 3200+
Gigabyte K8N Mobo
512mb Corsair RAM x2
HIS Radeon 4670 AGP
XP Home SP3
Western Digital 200gb x2

Yesterday I woke up to find my computer was off, due to a power outage. CPU usage is now idling at around 30-50%. I checked the process tab in task manager to find that nothing was using my CPU, and that System Idle Process was at 99. This should mean nothing is using it, yet the high CPU usage remains.

Prior to this my computer would often idle at 2-4%, only reaching about 50-60% when running Call of Duty 4, and 80% when running Starcraft 2. I noticed in both games with the graphics on low that I was getting around 30 fps, whereas I normally get around a steady 60 with medium settings. Interestingly enough, my ping to nearby servers was up 20-30 ms which has never happened before. Ping increase was also present at speedtest.net

Scanned using Avira and Spybot, found nothing. Uninstalled Avira, checked with AVG, still nothing.

Checked MSConfig, most of startup is always unchecked, in services there wasn't anything new.

I run my OS partition very lean, so reformatting was a quick answer to try. Surprisingly it remained at a consistent medium usage despite the fresh install.

I've tried googling various terms and have come across many with CPU usage problems, but my situation hasn't been answered by anything I've found.

So I turn to minds more experienced than my own:

Is there a program I can use to break down CPU cycles more completely?
Is there a way to test if the power outage has partially damaged the CPU, without another computer to test it in?
Are there other plausible explanations for this behavior I'm unaware of?

Screenshots of my task manager processes and performance tab can be found here:

http://img413.imageshack.us/i/wtm1.png/

http://img690.imageshack.us/i/wtm2.png/so


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October 25, 2013 12:47:00 PM

yeah man i got the same problem. system idle process says one thing but means another. because of the iproper driver or hardware being the root of the problem it is the idle process thats hogging up the UNUSED space thats not doing anything bullshit i keep hearing. and those idiots that keep saying that well experience the issue and tell me differently..........
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November 19, 2013 12:50:39 PM

In my case it was a driver that caused high cpu usage. I don't know exactly which one it was so below is the list of drivers I rolled back:

Computer configuration:
Intel i5-3470 3.20 Ghz
ASRock Z77 Pro3
Nvidia Geforce GTX 660
16GB DDR3 Ram 1600Mhz
Windows 7 Home premium 64bit

list of rolled-back drivers:

-Intel HD Graphics
-Nvidia GeForce GTX660
-Generic bluetooth radio
-Intel 82801 PCI bridge -244E
-Intel 7 Series/C216 Chipset Family SMBus Host Controller -1E22
-Realtek PCIe GBE Family Controller
-Intel USB 3.0 eXtensible Host Controller

After i restored above listed drivers to previous version, computer idles normally at around 7%. Prior to this, usage was constantly between 40-60%.

Hope this helps and if someone finds out which driver in particular causes this problem, be sure to let me know.
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June 6, 2014 8:37:00 AM

1] open run and type without the quots "TASKSCHD.MSC" and press enter onthe left panel u will see the running shedule task @ idle , either end them or delete them.
2]open run and type without the quots "msconfig" goto "services" and click on hide all microsoft . It will show what services otherthen microsoft are going, then uncheck them , & hit apply & go to the next tab which is "Startup" uncheck those u dont need to run when u boot.
3]open run and type without the quots "services.msc" it will open a window & stop or disable those u dont need.
It will solve ur problem.
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