How to get the cause of high CPU usage caused by apps?
Posted 25 July 2011 - 05:18 PM
I've been searching for a while trying to solve the same issue and your forum seems to be the most proficient and your response prompt.
- Laptop CPU 100% typically when viewing videos or flash, but I cannot always confirm this is the cause. Typically though while in a browser.
- Dell Laptop (detail below) recently upgraded to Win 7 64
- Same issue happened on Vista and I thought the upgrade would take care of it
- Disabled Windows Media Player Network Sharing Service and didn't seem to work
- Unplugged monitor (Hannspree HDMI) because I thought it was a driver issue, didn't have a long-term effect.
Intel Core 2 Duo CPU T6500 @ 2.1 Ghz
RAM 3 GB DDR3
Windows 7 Home Premium SP 1
I have downloaded the SDK and installed but the xperf command shows as invalid. I have read the post in Nov. 2010 with this " PATH environment variable and check if the path to the WPT was added". How do you check this variable/path?
I have changed the registry key as you instructed for 64 bit Win 7.
If I can run your commands I will post the issue here for your evaluation if I cannot figure it out.
Thank you in advance.
Posted 27 July 2011 - 12:52 PM
Here's my test:
- Open Chrome Browser
- Go to CNN.com and play a video and waited about 1 minute for CPU to hit 100%
- Captured a .etl file for two instances.
Instance 1 = Playing video in browser then pausing
Instance 2 = Closing Chrome tab for video
.etl files are large so I have only attached screen shots of these. Once I finish this post I will zip and post the smaller file (55 MB) if you wish to see it. I stopped my video test approx. 25 mins ago and the CPU is still at 100% or very close to it, so it is very slow zipping and FTPing a file.
Attached are four files:
Capture_1a = Summary table from Instance #1
Capture_1b = Summary table with Chrome.exe expanded
Capture_2a = Summary table from instance #2
Capture_2b = Expanded
You'll notice Task manager is open as well and I did this to monitor CPU but Task Manager also locked up and required reboot twice while getting the .etl files.
I'll post a zip location of the smaller etl if you want to view this.
Posted 27 July 2011 - 03:16 PM
Your driver for the NVIDIA GeForce 9400M G is very old: 220.127.116.1162 (2009.02.28)
So update the driver, please:
now check if the new driver fixed it.
Posted 27 July 2011 - 05:15 PM
I downloaded the driver v275.33
It appeared to work a little better but went back to CPU100% after I opened one tab in Chrome and viewed a CNN video. I would like to test in IE and FF but it takes about 20 minutes before the CPU comes back down I haven't done it yet. I will this evening.
Currenlty I only have Chrome (to write this) and Windows Live Mail open. Running 57 - 90% for about 15 mins, then just dropped to 8.
I am a web developer so I look at a lot of sites and if one of them happens to have a flash movie on it, I lock up.
This post has been edited by laptoptraveler: 27 July 2011 - 05:16 PM
Posted 27 July 2011 - 05:39 PM
xperf -start perf!GeneralProfiles.InBuffer NOW Run the programs which cause the cpu usage xperf -stop perf!GeneralProfiles.InBuffer 100CPUUsage.etl
zip and upload the 100CPUUsage.etl.
Posted 05 August 2011 - 12:56 PM
Thank you very much!
Posted 10 August 2011 - 01:09 PM
- Since I've installed the driver, it has calmed down considerably, but I lost so much work time I did not want to test it until I had time.
- I just did a Windows upgrade and it locked my laptop at 100% for about an hour or so after the intsall and reboot. It has finally calmed down.
- I'm also downloading another updated NVIDIA driver and will see if that makes a difference.
If there are still issues, I will post the files here for your review again. In my opinion it is the driver, but full testing will be done to confirm that in a couple days.
Posted 23 August 2011 - 10:40 AM
I appreciate your assistance in advance.
Posted 23 August 2011 - 11:27 AM
Posted 23 August 2011 - 12:04 PM
I did notice the umpnpmgr.dll via process explorer, but everything looks to be OK in device manager. It's a laptop with no hardware modifications to the original configuration. Is there a way to isolate Umpnpmgr to determine what's hooked it into that behavior?
Posted 02 September 2011 - 02:32 PM
Andre i am begging you... could you please look at my trace when i upload it on mediafire? Ive tried my best but NT Kernel & System eats 50 % of my cpu when i start playing World of Tanks... Thank you Chrobak
This post has been edited by Chrobak77: 02 September 2011 - 02:33 PM
Posted 02 September 2011 - 05:00 PM
Number of downloads: 20
From what I see this is your Atheros L1c PCI-E Gigabit Ethernet Controller driver. You use version 18.104.22.168 so try to update the driver, please.
Posted 03 September 2011 - 04:56 AM
This post has been edited by Chrobak77: 03 September 2011 - 04:57 AM
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