[MagicAndre1981]

correct. Now it is 40% CPU usgae caused by the driver. Check the driver settings and enable Interrupt Moderation and all Offload options. Also try to lower the speed to 100MBit. I doubt that you have a 1GBit Internet connection.

[fluffymasterchief]

Hello Andre.

Nice tutorial. It helped me greatly to find the source of high CPU usage.
But even though I know what is causing the problem, I don't know how to fix the problem: halmacpi.dll

This halmacpi.dll is using 50% or more of my cpu for 2-3 seconds in every 25-30 seconds interval. This causes a noticeable lag or unresponsiveness in my computer whenever I am doing anything that is CPU intensive. halmacpi.dll is also a part of a window system process so I can't exactly remove or shut it off either. And searching around the internet didn't help me much for finding a solution.

I've attached the screenshots of table summary.
A link to the downloadable latency.etl is here: http://www.megaupload.com/?d=PNTZL0GU

I appreciate any help or advice you could give me.
Thanks

Attached File(s)

•  1.png (125.73K)
  Number of downloads: 23
•  2.png (124.04K)
  Number of downloads: 19

[MagicAndre1981]

the BLKWGDv8.sys indicates an issue with the Belkin Wireless G Desktop Card driver. Your driver version is 6.1061.1115.2006. So try to get an update because this driver is from 2006.

[fluffymasterchief]

MagicAndre1981, on 26 October 2011 - 08:36 AM, said:

the BLKWGDv8.sys indicates an issue with the Belkin Wireless G Desktop Card driver. Your driver version is 6.1061.1115.2006. So try to get an update because this driver is from 2006.

Thanks Andre! I solved my problem

I couldn't find a latest driver for window 7 so I just disabled the device and removed the driver (wasn't using the wireless anyway) and now there is no more problem!

Thanks again man. Much appreciated

[MagicAndre1981]

ok, enjoy your Windows 7now

[Tosa23]

Hello Andre! First of all thx for the great tutorial. My explorer.exe causes 50% cpu usage, but now i'm not really sure what is the problem. Maybe this comctl32.dll causes the problem, but how to fix that?

Here are the screen shots and I appreciate any help from you. Thanks.

[MagicAndre1981]

you must load the debug symbols. Have you configured the symbolpath?

[Tosa23]

Update with loaded debug symbols:

[MagicAndre1981]

can you zip the trace, upload it and send me the link?

[Tosa23]

Here is the trace:

http://www.crocko.co...144/latency.zip

[MagicAndre1981]

The explroer uses a high CPU usgae because of the COMCTL32.DLL!CLVItemStore::CacheItem fuction. In the callstack I see VSDATANT.SYS. From what I see this is ZoneAlarm. Try to update or better remove ZA completely.

Next install the Vista Sp2! Vista Sp1 is out of support since July 2011! And also try to enable AHCI in the BIOS to get the best HDD performance. YOu're running the HDD in IDE/ATAPI mode.

[Tosa23]

ZA is now completely removed, but explorer still uses high CPU usage like before, arhg... Here is the new trace(ZA removed): http://www.crocko.co...477/latency.zip

AHCI is enabled in the BIOS, so im not really sure what is the problem with HDD mode.

[MagicAndre1981]

please install the Sp2 and test it again.

[Tosa23]

SP2 installed, but still the same problem...

New trace: http://www.crocko.co...5D6/latency.zip

[MagicAndre1981]

Function

COMCTL32.DLL!CLVView::IsCleanRect

causes 36% CPU usage. There is no docu about the function. IsCleanrect maybe GDI related. So update the graphic card driver for your NVIDIA GeForce 8600M GT. Your driver is ForceWare 176.44 (7.15.11.7644) which is very old.

Try this satble driver:

http://www.nvidia.co...hql-driver.html

or the latest Beta driver:

http://www.nvidia.co...eta-driver.html

and test if this fixes it.

[Tosa23]

Here is the update with new stable driver:

http://www.crocko.co...4A7/latency.zip

But still the same....

[MagicAndre1981]

Make a new trace with this command:

xperf -start perf!GeneralProfiles.InBuffer && timeout -1 && xperf -stop perf!GeneralProfiles.InBuffer ExplorerTrace.etl

this captures some more data.

[Tosa23]

here is the trace: http://www.crocko.co...579/Archive.zip

[MagicAndre1981]

I have no idea. It also doesn't show me more.

Do you have programs instaleld which insert new entries in the left side of the Explorer (ExplorerFrame with the drives, network and others)? Explror is here busy to insert data in a list view. Use ShellExView to disable 3rd party ShellExtensions. Maybe this helps.

[vicrol123]

Andre! i need your help!

i found user32.dll peekmessageA

Correct me if I'm wrong, the problem is 32-bit apps in x64 system?

two programs have the same "symptoms", use 25% of cpu randomly. is a intel 2500K in a gigabyte z68a-d3 drivers update!

here you have the route of one of the programs, HDTach

r3g4rd5