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How to get the cause of high CPU usage caused by apps?
Posted 27 February 2013 - 10:17 AM
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.
Posted 27 February 2013 - 01:50 PM
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.
Posted 28 February 2013 - 08:14 AM
Posted 28 February 2013 - 09:38 AM
Posted 02 March 2013 - 10:37 AM
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.
Thanks & Regards
Edited by callingashley, 02 March 2013 - 10:38 AM.
Posted 03 March 2013 - 01:01 AM
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.
Posted 09 March 2013 - 11:58 PM
Posted 10 March 2013 - 12:04 AM
Posted 27 March 2013 - 07:18 AM
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.
Thanks & Regards
Posted 27 March 2013 - 03:04 PM
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:
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.
Posted 28 March 2013 - 10:53 AM
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
Posted 28 March 2013 - 11:16 AM
Posted 01 April 2013 - 09:30 AM
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
Posted 01 April 2013 - 02:13 PM
Posted 05 August 2013 - 03:40 AM
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
Posted 05 August 2013 - 03:56 AM
oh yeah sorry here is my system profile
Posted 05 August 2013 - 10:02 PM
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
Posted 29 September 2014 - 01:38 PM
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:
Thanks in advance
Posted 29 September 2014 - 09:48 PM
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.
Posted 31 March 2015 - 09:26 PM
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?
Posted 31 March 2015 - 10:11 PM
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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