Solved System Interrupts Spiking CPU

[N00berG00ber]

i have a process called System Interrupts in performance monitor that us spiking the CPU from 0-10% usage. what is this process and how can i fix this?

this is a brandy new install of windows and all drivers and everything are installed and up to date. in DPC latency checker, i dont have any red spikes. the only thing that causes uneven us is my wifi card, but again, its not spiking red and is staying in the green.

any ideas?

 

[logicearth]

System Interrupts is related to hardware. However are you sure you are actually having a problem?

 

[N00berG00ber]

System Interrupts is related to hardware. However are you sure you are actually having a problem?

well i mean is spiking from 0-15% cpu usage. actual cpu usage is anywhere from 0-4%. in DPC latency checker, its not showing anything abnormal. i disabled my wifi, ethernet, and disconnected things that were plugged in and its still spiking.

 

[N00berG00ber]

i go this error in reliability monitor..... idk what it means tho. maybe my USB 3.0 Driver?

Driver Management concluded the process to install driver NULL Driver for Device Instance ID USB\VID_1BAD&PID_F900\00021929 with the following status: 0xe0000203.

 

[whs]

It could be a bad driver for your mouse or keyboard - since you already disconnected all the other devices.

 

[N00berG00ber]

It could be a bad driver for your mouse or keyboard - since you already disconnected all the other devices.

my mouse and KB have been installed before i installed windows....

 

[whs]

See whether unplugging and replugging them does anything.

 

[N00berG00ber]

See whether unplugging and replugging them does anything.

ok, running DPC latency checker again, i do have a spike into the red accisionally. i ruled out it being wifi, ethernet, and USB 3, keyboard, mouse, realtek audio, gpu audio, gpu driver. what else could it be? ive disabled everything that i could disable in device manager and still having it spike.... what now?

 

[whs]

Does the DPC latency checker not give you a clue - message underneath the bars.

 

[N00berG00ber]

Does the DPC latency checker not give you a clue - message underneath the bars.

read my previous post


"Some device drivers on this machine behave bad and will probably cause drop-outs in real-time audio and/or video streams. To isolate the misbehaving driver use Device Manager and disable/re-enable various devices, one at a time. Try network and W-LAN adapters, modems, internal sound devices, USB host controllers, etc."


it seems to have been reduced somehow....its running at .10% usage instead of the .50 average.

EDIT: nvm it just jumped up to .71%


wait a minute.... i get an error in event viewer saying that a driver never started "cdrom" and that is because i dont have one pluged in at the moment. maybe is because of that? heres the error in event viewer:


Log Name: System
Source: Service Control Manager
Date: 12/5/2013 10:38:10 PM
Event ID: 7026
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Patrick-PC
Description:
The following boot-start or system-start driver(s) failed to load:
cdrom
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />
<EventID Qualifiers="49152">7026</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8080000000000000</Keywords>
<TimeCreated SystemTime="2013-12-06T03:38:10.020811400Z" />
<EventRecordID>12051</EventRecordID>
<Correlation />
<Execution ProcessID="608" ThreadID="612" />
<Channel>System</Channel>
<Computer>Patrick-PC</Computer>
<Security />
</System>
<EventData>
<Data Name="param1">
cdrom</Data>
</EventData>
</Event>


i know thats due to my cdrom and how to fx it, i just chose not to because i do not have a sata cable plugged into it YET.

 

[whs]

Looks like you got this matter under control.

 

[N00berG00ber]

If its not the CDROM then um stumped.

 

[N00berG00ber]

nope. it still spikes every 2 mins or so in DPC latency..... what else could it be? CDROM is excluded

 

[N00berG00ber]

ok, i figured out the causes i believe.... here are the drivers and such that are causing the DPC spikes.

ataport.sys
netbt.sys
USBPORT.sys
afd.sys
ntoskrnl.exe
dpclat_driver.sys
dxgkrnl.sys

how would i update these or fix them from giving high DPC?

 

[carwiz]

Don't disable those or you'll crap your system out.

I don't know what dpclat_driver.sys is but the rest are system drivers.

Turn off Prefetch and let the system settle for a day or two until indexing and updates are finished. You shouldn't try to tweek a new system or try to benchmark it either. Let it stabilize by running it 24 hours, at least.

 

[N00berG00ber]

Don't disable those or you'll crap your system out.

I don't know what dpclat_driver.sys is but the rest are system drivers.

Turn off Prefetch and let the system settle for a day or two until indexing and updates are finished. You shouldn't try to tweek a new system or try to benchmark it either. Let it stabilize by running it 24 hours, at least.

its been up for a week. i have index disabled. and i know i cant disable them. i was wondering if i could update them...? should i install the AMD chipset drivers? i thought windows update did that automatically....

 

[carwiz]

You didn't follow the instruction for your motherboard, did you. The board drivers should have been the first thing loaded and updated. Windows Update does not normally update chipset drivers. It depends on what you have set for options. I wouldn't use them any way. They're likely older than the motherboard updates. Get your drivers from ASUS. They'll include INF installers that Windows needs to correctly deal with your hardware.

 

[N00berG00ber]

problem solved! i updated chipset drivers form AMD and no more DPC spikes! and system interrupts has dropped to <.05%. i ALWAYS thought windows update did that. Oooppps! anyway thanks guys for the huge help!

 

[carwiz]

Good job Patrick!

Pass on your new found knowledge to someone else.

 

[N00berG00ber]

Good job Patrick!

Pass on your new found knowledge to someone else.

lol thanks! glad i got it sorted out!