How to get the cause of high CPU usage by DPC / Interrupt
Posted 13 September 2011 - 05:33 AM
i've readed almost the whole thread this morning... i have some similiar issues as users described here before.
i have a sony vaio vpcec2s1e with an intel h55 chipset and i5 processor running win7 64bit. i've reinstalled windows from a clean dvd, no vaio installation!
now i have dpc latence caused by ndis.sys, acpi and usbport.sys... but i can only install all the updates available from sony vaio support, not the original intel ar ati stuff... any ideas? (i can post the files later when i'm back home)
This post has been edited by adlib: 13 September 2011 - 08:22 AM
Posted 13 September 2011 - 08:19 AM
is there a way to work around sony's driver-block-strategy?
This post has been edited by adlib: 13 September 2011 - 08:24 AM
Posted 13 September 2011 - 08:32 AM
how to install in device manager when i only get exe or install-files and no INF?
and one additional quastion: where do i get proper usbport drivers? the search for intel 55 chipset drivers only leads me to a chipset driver-set where intel states that apg and usb is not port of the driverset?
This post has been edited by adlib: 13 September 2011 - 09:07 AM
Posted 13 September 2011 - 12:28 PM
have done the traces... here are the files from interrupt_cpu and cpu (wasn't sure which one you'll need after reading your tut, sorry)
hope you can find the problems!
i've tried to disable apci battery management and the atheros wlan card with the device manager and all latency problems are gone... hope we find a way so i don't need to disable those devices evertime i will use the laptop for audio (as daw)
Posted 13 September 2011 - 12:32 PM
Your system appears to be suitable for playing real time audio without dropouts.
Time running: 0:00:16
Highest DPC routine execution time (µs): 1459
Responsible driver: ACPI.sys (ACPI-Treiber für NT, Microsoft Corporation)
DPC count (execution time <500 µs): 351251
DPC count (execution time 500-999 µs): 49
DPC count (execution time 1000-1999 µs): 52
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0
Highest ISR routine execution time (µs): 87
Responsible driver: iaStor.sys (Intel Matrix Storage Manager driver - x64, Intel Corporation)
ISR count (execution time <250 µs): 185011
ISR count (execution time 250-499 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time >=2000 µs): 0
Highest pagefault resolution time (µs): 7
Hard pagefault count (total): 51
Number of processes hit: 1
Pagefault count of hardest hit process: 51
Process with highest pagefault count: svchost.exe (PID: 960, Hostprozess für Windows-Dienste, Microsoft Corporation)
Note: all execution times are calculated based on a CPU clock speed of 2261 MHz. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.
Posted 13 September 2011 - 12:39 PM
Also install Windows 7 Sp1 + all updates. You're still using Windows7 RTM from 2009 which is now over 2 years old. That is enormous age for a software.
Posted 13 September 2011 - 12:44 PM
and i will get all win7 updates/sp1 if you say it is a real help... a support-guy at my music-store told me not to update anything after a clean new win isntallation when i want to use the pc as DAW only...
i download all this stuff now... its 297mb... should be quite quick
updates 30/94 is done... which ETL file should i redo with buffer size set correct? the CPU or the interrupt_CPU?
This post has been edited by adlib: 13 September 2011 - 12:58 PM
Posted 13 September 2011 - 02:06 PM
Posted 13 September 2011 - 04:02 PM
Total = 5287 for module ndis.sys Elapsed Time, > 4096 usecs AND <= 8192 usecs, 13, or 0.25%
So ndis.sys causes the spikes. This is network related. Update the athr.sys driver for your Atheros AR9285 Wireless Network Adapter
And install the Sp1, you use Build 7600.
This post has been edited by MagicAndre1981: 13 September 2011 - 04:03 PM
Posted 14 September 2011 - 07:20 AM
Total = 1614 for module ndis.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 4, or 0.25%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 0, or 0.00%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 5, or 0.31%
And this happens when you use Opera. Does it happen with other browsers, too?
Posted 14 September 2011 - 07:43 AM
when i've uploaded the first traces opera wasnt even installed... i installed opera yesterday but its not difference if i use ie8, ie9, opera or no browser at all... the ndis caus some spikes even when there is no internet usage at all... atheros is updated and there are no more windows updates available. what to do next?
Posted 16 September 2011 - 06:17 AM
thx for your help so far... any more ideas?
i've tried a lot of different drivers for the atheros this weekend... odler drivers, new drivers... no difference. as soona s the atheros 9285 driver is activate ndis.sys creats latency spikes. the same for the battery... sony drivers and win7 drivers both make acpi.sys create latency. when i deactivate atheros and battery in the device manager the laptop runs perfect... really annoyed with this situation