Excessive Hardware Interrupts
Oct 6, 2009
I have a Dell Workstation (Optiplex 760) with a fresh install of Windows 7. Right from the get go, I noticed that the second core is running around 20-30%. Taskmgr is not that helpful so I installed Process Explorer. While reviewing the cpu information, Hardware Interrupts bounces between 20 and 35%. I downloaded RATTV3 and created a log file.
After 5 minutes I checked the log file but to my disappointment the "Cumulative Histogram for:" is blank. It gives me all the information except the culprit!!! (bangs head on desk). After visiting Microsofts RATTV3 site, it states there is a known bug with vista and windows 7 in regards to displaying a blank value.
Is there any application available that can tell me the file name (drivers) that is causing the excessive hardware interrupts?
-- To give you a little background --
Windows 7 installed all drivers except HECI and SOL (AMT). I installed these which were available on Dell's website. Before these drivers were installed, I was still experiencing the second core cpu excessive usage.
There is nothing in task manager that points to high cpu usage (which is why I am using process manager).
I tried disabling common devices to see if the usage would drop down (all communication ports, NIC, Audio, HECI, SOL).
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Nov 2, 2011
I recently upgraded from a Packard Bell Denver 10/ 2GB RAM motherboard to an ASUS P5G41T-M/ 4GB RAM motherboard on my desktop, and kept my processor, a Pentium E2160 dual core, and I'm running Windows 7 Home Premium. With the Packard Bell motherboard, after switching on the PC all applications start to power down on RAM use after 2 minutes, and this is shown in Task Manager/ Processes as it happens. With the ASUS motherboard, there is no powering down of RAM use, but a powering up instead. Running the same applications, the Packard Bell usually settled at 550MB in Performance/ memory; the ASUS is 1.01GB. Why is this?
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Aug 17, 2011
what is the difference between this two
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Sep 25, 2011
I recently noticed while playing games my FPS was lower than normal. I checked my processes list and found this 'System Interrupts' process was hogging anywhere between 0 and 25% of my processor.I've tried all the usual stuff suggested by people including cleaning the registry, reinstalling drivers, even a windows restore to a few days before.
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Nov 21, 2011
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Dec 1, 2009
i have just decided to turn my old computer into my media center so i decided to do a bit of upgrading, like up the ram, format and install Windows 7. all was fine with that.
then i decided to get the HDMI crankin as well and have had nothing put problems. i tried a pci-e ATI HD 2400pro 1st, and now i have a pci-e Saffire Radeon HD 4350, and they both have the same problem.
when i use process explorer and no card installed (on board card) 0% hardware interrupts. 20% cpu usage install either HDMI card and 80 -90% hardware interrupts, 100% cpu usage all the time.
each time i try a new card i uninstall all vid drivers, turn off the cpu, install card, load new drivers (tried vista and 7 drivers) still no luck. boot time is 10secs with the on board card, 3 mins with either PCI-E card.
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Nov 22, 2012
Whenever a USB device is plugged into my laptop (any of the USB ports), the CPU usage goes way up. It stays up even when the device is then unplugged, and the only way to bring it back down is to either reboot, or to go into "sleep" (when Windows resumes the problem is gone).
The Windows 7 resource monitor indicates that the problem is System Interrupts - Deferred Procedure Calls and Interrupt Service Routines. I have updated my drivers for each thing, and that has not helped. Not has lots of Google searches on this problem.
Running Windows 7 Home Professional 64 bit, on a Toshiba Portege R705-P41.
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Feb 20, 2011
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Dec 14, 2009
ive installed windows 7 ultimate 32 bit and what ive noticed was - high cpu drain from hardware interrupts.
I have two sound cards- first is Realtek HD which is integrated with motherboard. Second is SB Audigy.
Ive noticed some trick to clear the cpu drain from hardware interrupts to a normal size (close to 0%). The trick was to enter sleep mode and come back from it. But the problem was- my system was running quick and easy but without any sound ! Thats a common problem with vista and windows 7 that ive heard of.
So i took out the sb audigy and there is some small improvement. Cpu doesnt get that much load from interrupts (around 10 -20% less). I use now only Realtek HD and now the sleep mode option doesnt work because the interrupts drain stays aswell with the sound.
What to do ? Drivers as windows 7 says are - up to date. I guess that problem was even before installing Windows 7, but then because of xp which works faster on my machine could have been unnoticed by me.
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Jun 5, 2011
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Oct 6, 2012
i am having a problem with my memory getting tied up / used up and not being able to access it again until i reboot.
machine: dell xps studio 8100
os: win 7,
processor: i7 2.8
ram: 16gb (max it will take)
video: ati radeon 5700 (running 3 monitors)
versions: as far as i know i am running current versions of everything, including video drivers, flash, chrome, etc. (i've tried running chrome with both the build in version of flash and the system version -haven't seen a difference)
browser: i nearly exclusively run chrome / canary with auto-updates so am at the latest builds.what seems to cause me to use up / run out of memory is after i play videos (Internet, netflix, etc.), the memory seems to get used, but is not returned to the system, even if the browser is closed and re-opened.right now for example things are working fine; i rebooted my system a couple hours ago (but have not played any videos). i have adobe lightroom running, picasa, chrome and canary (currently 4 web browser windows open with 52 tabs open). task manager currently shows me using 8.20gb of ram, that seems pretty reasonable to me.
normally my system will keep running properly (if a program is closed, memory is freed up) right up until i start to play any videos (Internet, netflix, etc.) then it will start using up more memory. (of course i expect it to use more memory during playback) however, even if i restart the browser, the memory does not get freed back up. for example, just prior to the reboot, with everything closed, i was using right around 8gb of ram. once i rebooted, i was using 1.something gb of ram prior to opening any programs.however, once i start playing some videos, i never seem to be able to get my ram freed back up again unless i reboot the whole system. this is not just a problem with how much memory the system shows as being available, i frequently actually run out of memory. (task manager will show me as using around 15gb and then everything starts swapping out like crazy).
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