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MagicAndre1981

How to get the cause of high CPU usage caused by apps?

206 posts in this topic

@akent830

it is now much better, but every 2 second there is a spike of the Intel® Rapid Storage Technology tool (IAStorDataMgrSvc.exe)

Try to get an update for the intel driver.

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Same Password for the 7z files. I updated to the latest Intel could provide. 11.7.0.1013.

http://www22.zippyshare.com/v/94672451/file.html

It looks like it is still happening but not sure why. It is a very minor performance impact due to the capability of the system.

Let me know if you have any more input, I can open a case with Intel.

-Austin

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ok, the Intel spikes are gone, now you have periodic CrashPlane Service CPU usage which calls a DLL md564.dll, which tells me the tool calculates or compares MD5 hashes.

post-70718-0-87984100-1362028699_thumb.p

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Yeah, it is constantly doing that, comparing hashes with the server on their end. This is normal and expected. Thanks for taking a look at that.

Austin

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ok, compared to the begging the CPU is now much better. Enjoy your PC now :)

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Hi MagicAndre,

Got a new laptop 4 months back, Lenovo Z580, till a week, back everything was fine, but now its about 80-100% full CPU utilization.No process utilizing more than 10% (aggregate maybe 30%)(all users checked). Cannot understand the reason.In safe mode its perfectly fine.(CPU 2%)

I downloaded the win perf kit and tried the steps in your blogs, but was unable to find the options (graph "CPU sampling per CPU" ), maybe its different in the new perf kit version.

i uploaded latency.zip. Any help would be greatly appreciated.

http://www.mediafire.com/?9ysx9b84xdbyddd

Thanks & Regards

Ashley

Edited by callingashley
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the explorer uses some CPU usage to display overlay icons.

PromptService64.exe and PromptService.exe (5280) scan the registry for data.

that are the top3 programs which causes a high CPU usage. Next you run 3 AV tools (Windows Security Essentials , McAfee and COMODO). Only use 1 and remove the 2 others!

Use AutoRuns to stop all tools that you don't really need all the time.

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Thanks MagicAndre......MCAfee was expired and after removing it, system seems fine, using commodo as a firewall and security essentials as an anti virus. Although one strange problem does persist, on opening any new application or even a folder, the CPU usage shoots to 100% for a second to two!!!!!

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make a new trace which captures this CPU usage.

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Hey MagicAndre,

Thnx for the reply.....just back from a nice vacation.Please find the link of the trace, this trace is taken whenever i access folders on the system. The CPU usage shoots to 100% on folder access else it remains at 30-40% which i guess is standard.

http://www.mediafire.com/?b5v1c991b5zj64j

Thanks & Regards

Ashley

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you have DPC issues:


Total = 3164 for module iaStor.sys
Elapsed Time, > 512 usecs AND <= 1024 usecs, 1005, or 31.76%
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 25, or 0.79%
Total, 3164

Total = 23 for module netbt.sys
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 4, or 17.39%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 17, or 73.91%
Elapsed Time, > 8192 usecs AND <= 16384 usecs, 1, or 4.35%
Total, 23

Total = 423 for module tcpip.sys
Elapsed Time, > 512 usecs AND <= 1024 usecs, 220, or 52.01%
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 34, or 8.04%
Total, 423

udate the Intel AHCI, Realtek and Broadcom network drivers.

I can also see this call:

ntkrnlmp.exe!VerifierExAllocatePoolEx

this means you have driver verifier enabled. Didi you get several BSODs? Did you enable the verifier for better dumps? Please disable driver verifier and reboot. Your PC should be faster without DriverVerifer.

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Thnx MagicAndre...

I checked all three Intel AHCI, Realtek and Broadcom ....all reverted with the latest driver is already installed (this is a 5 month old lenovoZ580 with win7 laptop).I do get BSODs sometimes, mainly caused by NVIDIA...but that too has the latest driver installed.I have disabled driver verifier.

Thanks & Regards

Ashley

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is it now better with driver verifier disabled?

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Hey MagicAndre,

Thnx a ton!!!!!!...disabling Driver Verifier did it!!!!!! this was enabled by default on my system....win7 came with the laptop.Now the CPU is 12% on folder access, while typical CPU is 2-3%. Do let me know which report you saw on the WPA, i had tried, but could not figure which process was utilizing the CPU. Thnx once again....u da man.

Thanks & Regards

Ashley

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I saw this in the callstack of the CPU sampling summary table.

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HI, I'm new to this forum as I have an issue with the NT Kernel eating over 50% of my CPU and its constantly maxed at 100%. I have read the tips here and have included the following print screens, I am hoping that someone can help me as this is a nightmare for me. I'm a total Noob at this sort of stuff and have tried to follow the instructions but am not getting something right.

First i downloaded the Windows performance tools and there is a screen shot of this, then I downloaded xperf but when I try to run the commands in CMD i get the response in the cmd screen shot. Also I have changed the value in regedit as described to 1.

please help and explain in laymans terms to me as i can not do the trace to get the help needed to sort it.

also in cmd i can not change it to c:\temp as it says its not a correct internal or external command

also when looking further into this thread another user was told to do this :- ( have you installed the wpt_x64.msi from the folder C:\Program Files\Microsoft SDKs\Windows\v7.0\bin? ) only i cannot find this in program files

hope you can understand this and help!

Thanks in advance

Tony

post-380467-0-35281300-1375695564_thumb.

post-380467-0-72228700-1375695580_thumb.

post-380467-0-35548400-1375695607_thumb.

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you miss the impact of the UAC. When you type cmd.exe in the startmenu search, make a rightclick and select "Run as adminitrator". read the link I posted

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I am currently running Windows 8.1 (64 bit standard edition) on a mid 2014 MacBook Pro with retina display. This was installed via boot camp.

 

Unfortunately with a clean install the CPU is idling at around 30%, meaning that the laptop is getting hot and the fans are running quite loud without using it. Task manager shows that this is a result of "system" and "system interrupts" using around 20% and 10% respectively.

 

I have managed to get a latency.etl file but I am unable to interpret the results. I think the interface of windows performance toolkit may have changed slightly since 2009. I can only see that "system" is using a lot of my CPU power.

 

MagicAndre, I have PM'd you a link to where the file is hosted. Would it be possible to look over this and see if you can identify the problem? Please also let me know if you require further information from me. Also, if anybody else wants to have a look at it the file is hosted here:

 

https://drive.google.com/file/d/0Bw27JiFE8K6KcWpkOUZEdjhKWFE/edit?usp=sharing

 

Thanks in advance :)

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looks like you used the Windows 8 SDK, so the fiel is corrupted. But I can see bcmwl63a.sys calls. So update your Broadcom network drivers.

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Any chance of updating the instructions for WIndows Performance Analyzer v6.3? The reason I ask is because:

 

Now go to the graph "CPU sampling per CPU" and select the interval where you have the high CPU usage, make a right click and select "Load Symbols" and next click "clone selection". Make a rightclick again and select "summary table"...

 

Everything in red either cannot be found/is located somewhere else or is named differently. There is a graph called "Utilization by CPU" under "CPU Usage (Sampled)." The option "Load samples" only appears under the "Trace" menu. "Clone selection" isn't available when right-clicking the selection, nor is "summary table."

 

Am I just doing it wrong?

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this guide was written for the old xperfview, not the WPA.exe. Share the ETL file and I'll take a look at it.

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