How to get the cause of high CPU usage by DPC / Interrupt

[Malumen]

the new trace shows again the "High Precision Event Timer" issue:

Thanks Andre! I don't understand 99.9999% of that stuff...

So what do I do?

[MagicAndre1981]

try to disable it in the BIOS.

[Malumen]

try to disable it in the BIOS.

Isn't that a little dangerous?

Do you know what that particular thing does? What it is being used for?

And I don't even know how to disable something in the BIOS. I don't even know how to access the BIOS... :/

[MagicAndre1981]

normally F2 oder DEL keys let you go to the BIOS. I've also disabled it. But make a full system backup to be safe.

[Malumen]

normally F2 oder DEL keys let you go to the BIOS. I've also disabled it. But make a full system backup to be safe.

So press F2 when I start into windows 7? Is that how to get INTO the BIOS?

Then when I'm in there, I have no idea how to disable that function... :/

Do you know of another tutorial or guide that can help me?

EDIT:

Andre, I am using an apple iMac with Bootcamp installed.

Thus, I do not have a BIOS. It is using an "EFI".

Do you know how I can access this EFI on my windows side? Alternately I could try booting up my Mac side and changing things from there...

Edited August 15, 2012 by Malumen

[MagicAndre1981]

5s google:

http://www.ehow.com/how_5444026_bios-macbook.html

[Lynxbro]

when u say --> go to C:\temp (cd\temp) and run the following commands:

what do u mean because it wont work with me

Edited August 18, 2012 by Lynxbro

[MagicAndre1981]

this is an example. Create a folder and name it what ever you want. You can also install this Tool:

ContextConsole Shell Extension

http://code.kliu.org/cmdopen/

to open a CMD with admin rights in every folder you want.

[davros303]

Hi Andre & all,

I've been searching for weeks to get a solution to bad latency issues causing static audio pops, dropouts and freezes in Win7 I even bought a brand new motherboard hoping to fix my latency issues, only to find them much worse with the new board!

storport.sys is now the main culprit which I isolated in LatencyMon.

Finally discovered this forum & thread. Andre - followed your instructions and discovered storport.sys "RaidAdapterTimerDpcRoutine" is the culprit, with a max actual duration of over 51ms per spike.

However now that I've located the problem - what can I do about it? I've searched for a long time for any kind of update or fix or revision or driver rollback for storport.sys.

System is:

Windows 7 64bit SP1

Asus Sabertooth 990FX mobo

AMD Phenom II X6 1090T black

8gig ram

Have installed all latest drivers from Asus including latest BIOS, latest drivers for the GFX card etc and all the Win7 updates including SP1.

Cheers from Australia,

David

[MagicAndre1981]

Do you use a RAID adapter/functions of your SATA controller? If not, disable the RAID functions.

[davros303]

Hi Andre,

No I don't have a RAID setup - using 3 separate drives - an internal IDE HDD, an SSD and an external drive connected via SATA.

I checked in the BIOS and the SATA ports are all set to AHCI, and I couldn't find any other options to enable or disable RAID. Are there settings in the device manager or switches in the registry I need to change?

All the best,

David

Edited August 29, 2012 by davros303

[MagicAndre1981]

please gibe me the ETL file, I'll try to find a solution.

[davros303]

Hi Andre,

Much appreciated.

http://www.mediafire.com/?y1ij18z912af58d

Asus got back to me and simply said, "talk to Microsoft". Thanks Asus.

Cheers,

David

[MagicAndre1981]

DPC Info

Total = 3993 for module storport.sys

Elapsed Time, > 1024 usecs AND <= 2048 usecs, 76, or 1.90%

Elapsed Time, > 2048 usecs AND <= 4096 usecs, 0, or 0.00%

Elapsed Time, > 4096 usecs AND <= 8192 usecs, 0, or 0.00%

Elapsed Time, > 8192 usecs AND <= 16384 usecs, 0, or 0.00%

Elapsed Time, > 16384 usecs AND <= 32768 usecs, 0, or 0.00%

Elapsed Time, > 32768 usecs AND <= 65536 usecs, 38, or 0.95%

Total, 3993

storport.sys!RaidpAdapterTimerDpcRoutine calls amd_sata.sys. This is the AMD SATA driver. You use a older version from 2011:

"amd_xata.sys", "1.2.001.0292 built by: WinDDK"

"amd_sata.sys", "1.2.001.0292 built by: WinDDK"

Install the 12.8 Southbridge driver:

http://support.amd.com/us/gpudownload/windows/Pages/raid_windows.aspx

Edited August 30, 2012 by MagicAndre1981

[davros303]

Wow, they were the only drivers I hadn't installed. Big thanks!

The DPC is much better, but still spiking into the red on DPC latency checker every few seconds. The new culprits seem to be Wdf01000.sys (FxDpc:FxDpcThunk) and nvlddmkm.sys (0xfffff88011186128).

What's misbehaving now?

http://www.mediafire.com/?qob0e3k3h0ihgnq

Cheers,

Davros