[MagicAndre1981]

Which device to you have exactly? The Firestudio only has beta drivers for Windows 7.

[sounds]

MagicAndre1981, on 05 March 2010 - 07:05 AM, said:

Which device to you have exactly? The Firestudio only has beta drivers for Windows 7.

That's right they are beta. but it doesn't explain what windows 7 is saying in the health report. I have a high interrupt rate. it does it even if my firestudio is not plugged in.

[vfwh]

Hey MagicAndre,

I followed your very instructive method and got to the bottom of it (BTW, might be interesting to point out that one needs to de-select all in a custom install of the SDK, and then only select Development Tools - including the .NET part. Then it's only a 400Mb download).

My problem now lies in the fix. I am running W7 64-bit on a 27" iMac (late 2009 model) on a Core i7 (quad) using Bootcamp 3.0 with OSX SL 10.6..

I'm currently downloading the 3.1 update of Bootcamp, but am not hopeful that it will solve my problem.

The process you described yielded the very clear finding that ACPI.sys is causing the pb:

 CaptureSystemInterruptsDiag.PNG (83.56K)
Number of downloads: 116

This is using up a full processor out of my 4 processors 100% of the time... My iMac is red-hot.

Now I have cruised the forums all over the place, but nobody has identified this particular problem with Boocamp on this iMac, although similar problems point to the fact that one should disable ACPI compatibility stuff. My problem?

My Windows 7 won't let me do that. I just don't get the Remove or Disable buttons when I go to these devices. I can't go in BIOS either as there is no BIOS, it's Bootcamp.

I'm at a loss here.

Just to be quite complete: I'm running Windows with Bootcamp, but also have VMware installed on the machine, using the Bootcamp intall when in OSX. I've tried disabling the VMWare stuff while in native W7 mode, but it doesn't change anything.

Any pointers?

(It's extremely rare that I post a question, usually the answer is already somewhere. In this case, it isn't, or I'm really not looking right.)

[MagicAndre1981]

sounds, on 05 March 2010 - 03:46 PM, said:

I have a high interrupt rate. it does it even if my firestudio is not plugged in.

but the drivers are installed! What happens if you remove the drivers? If the issue gone?

vfwh, on 08 March 2010 - 06:05 AM, said:

My problem now lies in the fix. I am running W7 64-bit on a 27" iMac (late 2009 model) on a Core i7 (quad) using Bootcamp 3.0 with OSX SL 10.6..

I'm currently downloading the 3.1 update of Bootcamp, but am not hopeful that it will solve my problem.

The process you described yielded the very clear finding that ACPI.sys is causing the pb:

CaptureSystemInterruptsDiag.PNG

This is using up a full processor out of my 4 processors 100% of the time... My iMac is red-hot.

Now I have cruised the forums all over the place, but nobody has identified this particular problem with Boocamp on this iMac, although similar problems point to the fact that one should disable ACPI compatibility stuff. My problem?

My Windows 7 won't let me do that. I just don't get the Remove or Disable buttons when I go to these devices. I can't go in BIOS either as there is no BIOS, it's Bootcamp.

I'm at a loss here.

Just to be quite complete: I'm running Windows with Bootcamp, but also have VMware installed on the machine, using the Bootcamp intall when in OSX. I've tried disabling the VMWare stuff while in native W7 mode, but it doesn't change anything.

Any pointers?

You can't disable ACPI, this is required for using Windows >= Vista. Have you tried the latest Bootcamp?

[Saftawy]

Hello MagicAndre1981,

This is my summary table, as you can see it's not good!

I'm using Windows 7 x64 - please help...

Attached File(s)

•  summary.png (179.83K)
  Number of downloads: 115

[MagicAndre1981]

Hi,

I've used a disassembler to look what the function does and from what I see, it belongs to the PowerManagment which control the new CoreParking ( http://thelazyadmin....re-parking.aspx, http://blogs.technet...-in-action.aspx, http://www.windowsit...er-scheme-.aspx ) feature.

Can you disable it and check if the CPU usage is reduced?

André

[Saftawy]

Hello André, Thanks for your quick reply

It was a bug in bios, I had a beta bios installed for sometime and forgot about it, I just reverted to latest stable bios and the problem is now gone.

[MagicAndre1981]

Hi,

great to hear, that it is fixed. So the BIOS had some trouble with the CoreParking feature.

Have fun with your Windows now

[vfwh]

MagicAndre1981, on 08 March 2010 - 06:36 AM, said:

vfwh, on 08 March 2010 - 06:05 AM, said:

My problem now lies in the fix. I am running W7 64-bit on a 27" iMac (late 2009 model) on a Core i7 (quad) using Bootcamp 3.0 with OSX SL 10.6..

I'm currently downloading the 3.1 update of Bootcamp, but am not hopeful that it will solve my problem.

The process you described yielded the very clear finding that ACPI.sys is causing the pb:

CaptureSystemInterruptsDiag.PNG

This is using up a full processor out of my 4 processors 100% of the time... My iMac is red-hot.

Now I have cruised the forums all over the place, but nobody has identified this particular problem with Boocamp on this iMac, although similar problems point to the fact that one should disable ACPI compatibility stuff. My problem?

My Windows 7 won't let me do that. I just don't get the Remove or Disable buttons when I go to these devices. I can't go in BIOS either as there is no BIOS, it's Bootcamp.

I'm at a loss here.

Just to be quite complete: I'm running Windows with Bootcamp, but also have VMware installed on the machine, using the Bootcamp intall when in OSX. I've tried disabling the VMWare stuff while in native W7 mode, but it doesn't change anything.

Any pointers?

You can't disable ACPI, this is required for using Windows >= Vista. Have you tried the latest Bootcamp?

So, problem identified and circumvented for now, not solved. It turns out that this crazy processor hogging happens when I connect a headset to the headset jack. Plug it in, boom, CPU at 100%. Unbelievable.

As it happens, I also had a huge network latency problem (my 10Mbps connexion wouldn't go past 300Kbps - i.e. instead of 2-3Megabytes per second I'd get 10Kbytes per second download). I thought it was related. In fact it wasn't.

So I have also, eventually, connected an external WiFi device (Belkin F5D8053) and it works. I think it's very clear now that the Atheros WiFi installed on the 27" Core i7 basically doesn't work with W7 Bootcamp. I have reinstalled drivers and so on (BTW, finding Atheros drivers on the net is close to impossible). Will have to wait until they release new drivers before I enable it again. It works like a breeze on Snow Leopard, though.

I'll investigate the headset freaky issue. Will resintall or change drivers and see what happens. Will keep you posted.

Thanks for posting.

[MagicAndre1981]

this is a really strange issue with your headset. Ok, post us what you found out later

[vfwh]

MagicAndre1981, on 09 March 2010 - 06:15 AM, said:

this is a really strange issue with your headset. Ok, post us what you found out later

Well, it's a hell of a weird story, but it's, er, "fixed", so to speak.

Basically, if I ease out the headset jack just a fraction, then it works... There's some issue also about the fact that trrs (mic and audio out in the same jack) is not implemented properly in Bootcamp/Win7. It's threrefore probably related, as the trrs depends on finer position of the connector in the jack, I guess. Or something.

You can go here to find out more details about that story and how broad of a user base that issue affects, with Apple obviously not giving a rat's a**:
http://discussions.a...00699

Cheers.

V.

P.S.: I did of course try several driver versions for the internal Cirrus Logic and so on, to no avail.

This post has been edited by vfwh: 09 March 2010 - 06:10 PM

[sounds]

Ididnt think it woudl do anything if I uninstalled the Firestudio driver, but it did. and it when I ran the W7 health report it said nothing of high interrupt rate. So i guess i will let presonus know. thanks Andre.

[quote name='MagicAndre1981' date='08 March 2010 - 07:36 AM' timestamp='1268051794' post='912175']
[quote name='sounds' date='05 March 2010 - 10:46 PM' timestamp='1267825561' post='911847']
I have a high interrupt rate. it does it even if my firestudio is not plugged in.
[/quote]

but the drivers are installed! What happens if you remove the drivers? If the issue gone?

This post has been edited by sounds: 12 March 2010 - 12:39 PM

[MagicAndre1981]

sounds, on 12 March 2010 - 12:39 PM, said:

Ididnt think it woudl do anything if I uninstalled the Firestudio driver, but it did. and it when I ran the W7 health report it said nothing of high interrupt rate. So i guess i will let presonus know. thanks Andre.

ok, so contact the support of PreSonus.

[BartDude]

Hello, I'm having a similar problem but as you can see in the sumary the causer is intelppm.sys. I already tryed a clean boot but the cpu its still at 50%++

http://img98.imagesh...98/2557/dcp.png

[MagicAndre1981]

Hi, the idle process is nothing you should worry about. The intelppm.sys brings the power saving features of your CPU to Windows.

Extend the "System" node please and post the new picture!

regards
André

[BartDude]

MagicAndre1981, on 21 March 2010 - 03:05 PM, said:

Hi, the idle process is nothing you should worry about. The intelppm.sys brings the power saving features of your CPU to Windows.

Extend the "System" node please and post the new picture!

regards
André

Here it is http://img153.images...3/6871/dcp1.png

[MagicAndre1981]

please provide the complete etl file. upload it to your SkyDrive (if you have a LiveID) and send me the link via PM.

[MagicAndre1981]

You have the same issue like vfwh. The ACPI driver is causing the usage. Do you use the latest BIOS/drivers? Does it also happen if you make a Clean Boot (http://support.microsoft.com/kb/929135). If not a third party driver/program is causing it.

[VultureX]

Hello,

thank you for this tutorial

While analysing my laptop* I found 2 things.
This is with my WLAN enabled. There are 2 bands with high CPU usage to see. During that time I was downloading and uploading with about 1.3MB/s respectively.
There are also other peeks to be noticed. I will come back to those later.



As you can see, the main culprit is the ndis.sys driver, which indicates bad WLAN drivers. Is there something I can do about this, besides updating the drivers? I can't find any new drivers on the net. I can't find ANY firmware updates on the net.
The latest drivers I can find are:
http://www.atheros.c...AR9285&system=3
which have version number 7.7.0.331, which are in fact older than the Windows Update drivers which have version number 8.0.0.238
I've found some drivers on MSI's site and I've tried multiple versions, but it makes no difference for the high DPC latencies.



Now the trace with WLAN disabled:





There's just peeks to be seen. These are the same peeks you saw after the downloading/uploading in the previous images. These peeks occur every 15 seconds and are caused by:



ACPI.sys. This does not change with a (sort of) clean boot.
'Sort of' clean boot? Well, the norton internet security service does not allow itself to be disabled. When I deselect it and click apply it just becomes selected automatically again. Even in safe mode...

*
MSI CS620:
Interl Core i3-330M
ATi Radeon HD5470
4 GB DDR3
Win7 32 bit
Wireless Network Adapter: Atheros AR9285

This post has been edited by VultureX: 07 April 2010 - 06:05 AM

[MagicAndre1981]

Hi,

don't worry about the WLAN. The cause is the ACPI.sys driver. Have you installed the latest BIOS/chipset drivers?