Curious - CPU usage sometimes high!

Sometimes (but not often) I'll notice my Q10 (with OS 10.2.1.3247) is warm and using battery faster than usual.
A check of the CPU usage shows the System as the user of the CPU with usage rate vascillating around 50%.
A reboot thus far has always remedied the anomaly.
. . . . Pete

Did you add any emails account recently or install anything new like media card?
Or did you do an os update recently?

Similar Messages

Satellite A45 - CPU usage is high and applications slow

Hi all,
I'm trying to debug a hardware problem on my Toshiba Satellite A45. I'm running Ubuntu 10.04, but I don't believe this is OS or software related.
THE PROBLEM: CPU usage is high and applications slow to a crawl after using a memory intensive application for a few minutes, i.e. viewing a video or playing a game. Basically, anything that might use the screen a lot. If instead I work only from a command prompt, even when the application might be doing a lot of work, I don't encounter this problem. After shutting down all application, CPU usage is still higher than normal (90% idle, should normally be about 99% idle).
Xorg typically now showing about 6% usage (normally < 2%). If I at any time after this try to work in any application, usage is still bogged down. Only a reset gets me back to normal.
Note: My system had always worked fine, and I had not done any software installation or changes when this started happening.
However, the laptop did go through an 800 mile round trip in the back of the car in a padded laptop bag.
DEBUG: This doesn't seem to be RAM as I have replaced RAM and reseated the RAM, and the problem still occurs. This doesn't seem to be the Hard Drive as I can try to run from a Live CD (no HDD usage) and everything still slows to a crawl.
HELP: I'm not sure how to debug from here.
I don't have extra bits of hardware to do swaps.
Any ideas how to further debug this?
Thanks,
Grommit

Hi grommit
What do You think about the possibility that your PC is becoming overheated?
To me this sounds like such a scenario.
Your using an application which is intensive - which makes the unit warm up a lot probably.
After that everything is sluggish. This is what may happen when cooling is not sufficient - the CPU is throttled to reduce heat generation. And the effect is that the unit works pretty slow.
May I suggest that You try to let the unit be off for some time before trying it again - I don't know your possibilities, but I would put it on the balcony or on the floor below an open window too cool it really much.
Then try again from whatever media you like.
The result? Good performance for a while again? Then either clean the cooling module yourself or have a repair workshop do this for You.
Good luck and stay with Linux! :)
BR Tom

Why is Flash CPU usage so high on my PC?

To other psoters here - Please do not hijack my thread for any other performance issues with Flash other than high CPU usage.
This thread is (hopefully) dedicated to why the CPU usage on my desktop PC jumps when I go to a page with flash 'content'. Thank you!
I am hoping that there is an answer for why my computer is using a very high amount of CPU percentage when I am viewing flash content?
I am running Windows Vista Home Premium Service Pack 2 on a Gateway GT5432 desktop computer.
I have Shockwave Flash version 11.7.700.169 installed.
I am using Firefox version 20.0.1 (but I have seen same problem of high CPU with Google chrome).
Here is one page that is causing the high CPU usage.
-   http://logansroadhouse.com/Default.aspx
That page appears to have lots of Flash content.
If I open that logans roadhouse page, my CPU usage goes from an average of 12%, to 80%!
The process I see jump are:
- Firefox's "plugin-container.exe" goes from 0% to about 50%
- Firefox browser "firefox.exe" goes from around 8% to 14%
- Adobe's plugin "FlashPlayerPlugin_11_7_700_169.exe" goes from 0% to 16%
- TOTAL CPU change from 8% to 80% after opening up just this one page !
When I close the page, the CPU usage goes down again. Open again - CPU goes high again.
Also if I go to the firefox addons page and DISABLE the SHOCKWAVE FLASH plugin, then go to that Logans Roadhouse page, very little of the content I saw with Flash enabled is visible - which I take to mean it is a page consisting of lots of Flash 'content'. Also the CPU usage remains low (8%) if I go to that page - after disabling the Shockwave Flash plugin.
I have seen the CPU also go high on youtube.com pages also - CPU jumps just as I said above - if Flash is enabled. CPU then drops after disabling Flash plugin.
I was hoping you had a fix for my problem? My PC becomes almost unusable with the CPU so high. It sure looks like it is the Flash plugin driving the CPU so high.

I am also facing the same problem from last 2-3 weeks since i upgraded my flash player to latest one.
All softwares and drivers are upto-date.
I play wartune MMO flash browser based game (also applicable to youtube videos) which is now using above 80% of CPU. Before upgrading, CPU usage was normal around 5-15% depending upon the events, but not more than 20% even if i open 3-4 accounts of wartune in different windows at the same time. It happens in all browsers (IE10, Mozila22.00, Opera12.15, Chrome27.0.1453.116 m).
I tried all solutions like disabling hardware acceleration, flash cache size to unlimited, clearing all flash cache etc but the same problem.
Please fix this problem as soon as possible.
My System Specs as follows
System
Manufacturer
System manufacturer
Model
System Product Name
Total amount of system memory
4.00 GB RAM
System type
64-bit operating system
Number of processor cores
2
Storage
Total size of hard disk(s)
307 GB
Disk partition (C:)
18 GB Free (40 GB Total)
Disk partition (D:)
28 GB Free (34 GB Total)
Disk partition (E:)
11 GB Free (58 GB Total)
Disk partition (F:)
4 GB Free (58 GB Total)
Disk partition (G:)
6 GB Free (116 GB Total)
Graphics
Display adapter type
Intel(R) G41 Express Chipset
Total available graphics memory
1759 MB
      Dedicated graphics memory
128 MB
      Dedicated system memory
0 MB
      Shared system memory
1631 MB
Display adapter driver version
8.15.10.2869
Primary monitor resolution
1440x900
DirectX version
DirectX 10
Network
Network Adapter
Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC (NDIS 6.20)
OS Name
Microsoft Windows 7 Ultimate
Version
6.1.7601 Service Pack 1 Build 7601
Other OS Description
Not Available
OS Manufacturer
Microsoft Corporation
System Name
Y2K-PC
System Manufacturer
System manufacturer
System Model
System Product Name
System Type
x64-based PC
Processor
Intel(R) Core(TM)2 Duo CPU
E4500 @ 2.20GHz, 2203 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date
American Megatrends Inc. 0702, 17-01-2011
SMBIOS Version
2.5
Windows Directory
C:\Windows
System Directory
C:\Windows\system32
Boot Device
\Device\HarddiskVolume1
Locale
India
Hardware Abstraction Layer
Version = "6.1.7601.17514"
User Name
y2k-PC\y2k
Time Zone
India Standard Time
Installed Physical Memory (RAM)
4.00 GB
Total Physical Memory
3.75 GB
Available Physical Memory
2.07 GB
Total Virtual Memory
7.49 GB
Available Virtual Memory
5.80 GB
Page File Space
3.75 GB
Page File
C:\pagefile.sys
Name
Intel(R) G41 Express Chipset
PNP Device ID
PCI\VEN_8086&DEV_2E32&SUBSYS_836D1043&REV_03\3&11583659&0&10
Adapter Type
Intel(R) 4 Series Express Chipset Family, Intel Corporation compatible
Adapter Description
Intel(R) G41 Express Chipset
Adapter RAM
1.75 GB (1,877,536,768 bytes)
Installed Drivers
igdumd64.dll,igd10umd64.dll,igdumdx32,igd10umd32
Driver Version
8.15.10.2869
INF File
oem6.inf (iEGL0 section)
Color Planes
Not Available
Color Table Entries
4294967296
Resolution
1440 x 900 x 59 hertz
Bits/Pixel
32
Memory Address
0xFE400000-0xFE7FFFFF
Memory Address
0xE0000000-0xEFFFFFFF
I/O Port
0x0000DC00-0x0000DC07
IRQ Channel
IRQ 4294967294
I/O Port
0x000003B0-0x000003BB
I/O Port
0x000003C0-0x000003DF
Memory Address
0xA0000-0xBFFFF
Driver
c:\windows\system32\drivers\igdkmd64.sys (8.15.10.2869, 10.14 MB (10,629,408 bytes), 14-11-2012 16:57)

CPU Usage is high - WebLogic Server 8.1 SP5

Hi,
We upgraded the WebLogic Server 6.1 to WebLogic Server 8.1 SP5 for one of our application.
The load test with WLS6.1 results,
CPU Usage was peak up to 18% with sessions 10 -15 simultaneously.
The load test with WLS8.1 results,
CPU Usage was peak up to 60% for 12 users simultaneously.
Why this higher CPU Usage in WebLogic 8.1 SP5 than WebLogic 6.1 for the similar environment (hardware)?
Please give us the solution or the suggestions asap.

If MQ V5 clients cannot interoperate with MQ V7 servers, then perhaps MQ V6 clients support the 1.4 JVM? If so, I suppose you can use an MQ V6 client to communicate with V7.
Alternatively, perhaps MQ's "extended transactional client" provides more flexibility in interoperability than the client you're using.
Tom

CPU usage very high, performance low

Using activity monitor, I gauge my cpu usage to be between 50 and 60 percent, with the Activity Monitor being THE ONLY APPLICATION OPEN! There are only two events which I can remotely correlate to this problem: downloading and using a new version of Firefox (3.07) and downloading and using Amadeus so I could listen to a Wiki file.
When I open Firefox or any other application, CPU usage goes straight to 100%. Then the machine slows down significantly. Any ideas?

You guys are not going to believe this! I did some searching where I discovered this comment by a user on MacRumors (sp?) named "cyantist:"
"For some reason I remember having this issue a while back, and the solution was this: right-click on the desktop > show view options > deselect show item info. It worked for me, but it wasn't Finder that was giving me 100% cpu, it was Safari or Camino."
Well, I couldn't really figure out what he had done but I right-clicked on the desktop>More>Configure Folder Actions> disable Folder Actions. Voila! Finder and mds dropped off the Activity Monitor list with percentages less than 1. Yikes! I did some experimentation and it turns out that all one has to do IS RIGHT-CLICK ON THE DESKTOP! At first, I thought it was toggling every time I selected and deselected "Enable Folder Actions," but doggone if the Finder and mds didn't drop off the map by simply right-clicking on the desktop. Bizarre! Now, with Activity Monitor and Firefox open, the cpu is running between 10% and 20%. Go figure! I'm not going to mark this problem as solved until someone chimes in with a reasonable explanation (which might come from . . . The Twilight Zone . . . )

CPU usage suspiciously high while idle

I have the following problem, help is very appreciated
Right after my computer finishes booting the CPU usage raises up to approx. 55% on both cores, I'll attach a screenshot to clarify.
What can be the cause of this?
To me, Xorg seems to be using more CPU than it needs.. still it's not 55%. The performance isn't bad either, the system works very well.
The screenshot http://dl.getdropbox.com/u/1811427/misc/idle.jpg
$ uname -a
Linux felipe-desktop 2.6.31-ARCH #1 SMP PREEMPT Tue Oct 6 00:48:55 CEST 2009 x86_64 Intel(R) Core(TM)2 Duo CPU E7300 @ 2.66GHz GenuineIntel GNU/Linux
$ top
top - 17:48:01 up 35 min, 3 users, load average: 0.28, 0.11, 0.08
Tasks: 107 total, 4 running, 103 sleeping, 0 stopped, 0 zombie
Cpu(s): 35.9%us, 18.5%sy, 0.0%ni, 44.9%id, 0.0%wa, 0.3%hi, 0.3%si, 0.0%st
Mem: 2057796k total, 840600k used, 1217196k free, 43768k buffers
Swap: 1020088k total, 0k used, 1020088k free, 344868k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1881 root 20 0 627m 42m 15m S 14 2.1 2:16.56 X
6263 felipe 20 0 40232 6136 2184 S 11 0.3 1:35.33 gconfd-2
6253 felipe 20 0 149m 7152 5516 R 4 0.3 0:40.75 gnome-session
14947 felipe 20 0 195m 34m 14m S 4 1.7 0:23.10 compiz
6259 felipe 20 0 11076 1524 820 S 3 0.1 0:34.75 dbus-daemon
7185 felipe 20 0 679m 121m 32m R 2 6.1 0:35.01 firefox
6267 felipe 20 0 215m 10m 7772 S 1 0.5 0:18.88 gnome-settings-
6285 felipe 20 0 399m 31m 20m S 1 1.6 0:10.30 nautilus
6323 felipe 20 0 162m 3044 1580 S 1 0.1 0:04.37 gnome-screensav
7592 felipe 20 0 197m 18m 11m S 1 0.9 0:06.89 gnome-terminal
6303 felipe 20 0 286m 36m 14m S 1 1.8 0:11.25 python
6284 felipe 20 0 229m 16m 11m S 1 0.8 0:11.05 gnome-panel
6273 felipe 20 0 36840 2080 1744 S 0 0.1 0:02.85 gvfsd
6311 felipe 20 0 145m 6792 5388 S 0 0.3 0:03.59 gdu-notificatio
6458 felipe 20 0 166m 8584 6368 S 0 0.4 0:04.06 notification-da
15615 felipe 20 0 324m 41m 18m S 0 2.0 0:03.91 gnome-do
1 root 20 0 3796 640 540 S 0 0.0 0:00.30 init
What else would be useful about my configuration?
Thanks in advance for any help

well well... looks like compiz WAS the problem after all... must've messed up while testing. So i 'found' a 'decent' workaround.
Deactivated compiz (set metacity as the WM) and removed compiz-icon from the startup applications, then i enabled metacity compositing (because i use both screenlets and docky)... and that's it, .. for now

System CPU usage too high

Hi, i've been trying to troubleshoot this problem for some months.. everytime i try to use perfmon or another program to watch for network usage (download and upload) the System process spikes to 13%~ constantly until i close it.. I could "live"
without that but now everytime i'm using an application on my second monitor, the same thing happens... started happening just an hour ago, and it's really bothering me because i don't have a clue what driver could possibly cause this.
I've tried capturing xperf traces on another forum but they keep come as corrupted as the person whose trying to troubleshoot with me tells me, and i can't seem to get a grip of the xperf analyser myself to see what (driver?) is using the cpu so i can try
to replace it...
Anyway, as i type this it jumped up to 20% and i don't know what to do.
I'll upload two xperf traces here, but at least one is "corrupted" as the other kind member on the other forums told me. (which is the first one below)
https://dl.dropboxusercontent.com/u/36066558/highCPUUsage.7z
https://dl.dropboxusercontent.com/u/36066558/highCPUUsage2.7z
And the one i just recorded, https://dl.dropboxusercontent.com/u/36066558/highCPUUsage3.7z
Does someone have another way or can help me find what's causing it?
I used the command xperf -on latency -stackwalk profile -buffersize 1024 -MaxFile 512 -FileMode Circular && timeout -1 && xperf -d highCPUUsage.etl
I took a print of the System process Threads in Process Explorer http://i.imgur.com/vbW36rU.png
Before the today's change, the function shown there was mostly ntoskml.exe!KeGetCurrentProcessorNumberEx+0x34, i don't know if that means anything...
Thanks.

NTM
First Xperf has been replaced by Windows performance recorder. Second there was almost no data recorded in your trace. Please run a windows performance trace as instructed in the wiki and upload it. Make sure you run the trace when the
problem is happening
In order to diagnose your problem we need to run Windows performance toolkit the instructions for which can be found in
this wiki
If you have any questions feel free to ask
Please run the trace when you are experiencing the problem
Wanikiya and Dyami--Team Zigzag

High CPU & Memory issues - Excessive and unnecessary CPU usage in Firefox for Windows (see also questions1003966 & 998289)

I am using the latest version of Firefox, 32.0.1, on an HP Pavilion dv7-4141sa laptop computer, running Windows 8.1 Pro 64-bit. There should be more than enough power here to run a browser without any problem, yet the computer is regularly being overloaded by the browser's resource usage.
I am currently measuring typical average CPU usage of 45% - with the browser minimised. That is to say, Firefox is not doing any browser jobs - it is not drawing on the screen - but it is using the most CPU of any process currently running. Why?
I am an ex-software engineer, and my understanding of current application development technology is limited, but I think I can say with some confidence that many techniques and software architectures exist that enable the suspension of program activity, or at least its reduction to a very low bare minimum, when the program is not actually carrying out its design function, which is in this case to draw pictures of website data on a screen.
There is a very serious problem here, one which means that I cannot run Firefox all the time, but have to kill it when I am not actively browsing, otherwise other applications cannot run to their full capacity. This is a great pity, because I have committed a lot of effort to making Firefox my primary web tool. It manages all my many bookmarks, contains my secure password manager (LastPass), manages my web security (via NoScript, AdBlock, and FlashBlock), just for a start.
Before any well-meaning moderators or other commenters start down the usual trail of "have you done this, tried that, disabled the other", I should point out that I have followed all the advice I can find, with no positive outcome. This computer is running a fresh installation of Windows, and a fresh installation of Firefox. At the moment I am running a new test Firefox profile.
The latest version of Adobe Flash, 14.0.0.179, is installed but disabled. When it is enabled and in use, Firefox's CPU usage seems high over longer periods, but overall there is little difference. It doesn't look as though the problem can be laid at Flash's door. A few other add-ins are installed, mainly those mentioned above, and Firefox is skinned with LavaFox v2-Green, but I have previously started from a clean installation, which has made little difference after an initial period during which things seemed to be better. Turning off or disabling various add-ons has made no discernible difference.
Just now I turned Flash on, and after a long period with Firefox minimised, Resource Monitor reported Firefox at 8% average CPU and FlashPlayerPlugin at 0.32%. While running a small video, RM reports FlashPlayerPlugin at about 45% and Firefox at 8%. After the video, Flash went back down to around 0.4%, and after a bit more browsing Firefox went to around 17% minimised. There seems little rhyme or reason here, except that Flash does not seem to be the culprit, although Firefox does seem to consume less when fewer tabs are actually active, as you might expect. I just refreshed more than a dozen tabs, and now Firefox is at 30%, but still not back up to the higher figures. Weird.
The CPU usage does vary a lot around the average, but 30% is still a lot for a program that shouldn't be doing anything above the minimum status maintenance, and still puts it at the top of my Top Process Monitor list. (Right now it's gone back up to 45%, without my using it in any way).
I have Telemetry turned on, so presumably Mozilla is recording some of the relevant data.
This is a very serious fault, which is more or less reproducible and which a lot of people seem to be experiencing. Probably more people have it than realise, because most users will not know anything other than that their computer slows down for some non-obvious reason; they may just think it's something to do with the computer itself, not knowing how to use the Resource Monitor and interpret the results.
Oddly, the problem does not seem to occur when running Firefox under Linux Mint 17, where the response is snappy and the CPU usage ostensibly low; I am going to look at this in more detail shortly.
I am not posting here for advice, but for information and as a form of bug report which hopefully other users will see. It will hopefully spare them a lot of effort and time in trying a lot of recommended "solutions" which will not work. The problem is inherent in the software, and can be solved only by Mozilla.
I am willing to supply any diagnostic data requested; as I said above, I have also turned on "Telemetry". However, I will not be trying out any more reinstallation/new-profile/add-on disable-enable-delete cycles unless I am asked to for very specific reasons. Please do not suggest courses of action which have already been mentioned elsewhere on this forum. I have tried them all.
The situation is very disappointing, but I have confidence that the Firefox developers will pin down the fault eventually and engineer a satisfactory solution that makes it viable to leave Firefox open all the time. Even with that restriction, it's still far better than the alternatives.

I share jmward's frustration. This is not a bug report so much as a request for a badly needed feature, ie the ability to have Firefox be able to tell us which tabs on which windows are eating time so we can target them. There are some very poorly written web pages out there which just plain loop while making no updates or inconsequential updates on the page.
This is not a OS problem; jmward runs Windows and I run Linux but we have the same issue. It is not a question of Firefox plugins or extensions, or even viruses; I have a new, clean Linux install but have the same problem on both my regular Firefox AND on a FRESH install of the latest Firefox (35.0.1) which has *NO* non-default plugins or extensions.
Here is an example of a web page which will eat 100% of one CPU's time:
http://patch.com/massachusetts/arlington/arlington-woman-allegedly-attacks-neighbor-snow-blower-0
I will attach 3 images to back up my claim. All of the images show my dark blue system monitor (gkrellm) superimposed on the web page. The top graph shows CPU time. I have 4 CPUs in my machine, so 25% means the web page is eating 100% of one CPU equivalent.
The first image shows the load of the offending page with elevated CPU usage along with the download net activity on eth0, but the CPU activity does not stop when the download activity is over.
The second images show the steady state 100% CPU equivalent of this page just sitting there apparently doing nothing. It IS, however, doing at least two different things. I know from my regular Firefox where I have "Remove It Permanently" installed that if I remove the the little weather indicator in the upper right of the offending page that CPU utilization drops to about 40% of one CPU equivalent. If I use RIP to remove everything else right down to a bare screen that 40% utilization stays until I delete the tab.
The third image shows the CPU utilization drop to zero when I delete the tab holding the offending page.
Now I will add a note here: If the offending page is NOT the top tab in a window then it stops eating time. The offender will also stop eating time if I minimize the window. However if I have another window up but leave the offender up on top in its window it continues to eat time even tho I am looking at another window. The offender will continue to eat time even if its window is completely covered by another window, and it will also eat time if I switch to another desktop.
I will often have half a dozen windows open, and there are many pages out there which will suck endless CPU time. Unless I want to open up a new tab on each window before I leave it there is likely to be some tab on top eating time uselessly. Get a couple of those going and Firefox becomes sluggish and can even stop responding for many seconds.
I guess I not only want to have Firefox tell us which tabs are eating time, but I would also like it if Firefox would stop giving CPU time to any tab which is not visible because it is covered by some other window and/or it is on a desktop which is currently not showing. If you can stop a tab's CPU usage by reason of tab-not-showing then you should also be able to stop its CPU usage when the window is covered or on the not-top desktop. Indeed is there any reason to not schedule absolute CPU utilization priority to the visible tab on the window with focus and give time to the other tabs only when the visible tab isn't using time?
My final thought on this is that I have had Firefox SO tied up sometimes that I swear their are web pages which are eating time even tho they are not the top tab. I regret that I do not have an example to show you. But Firefox grinds to a complete halt on a regular basis, and that is not acceptable. I am a programmer with long experience in multi-threaded programs so I *know* there is no reason you cannot do better. If there were another browser around which had the commitment to privacy which Firefox has I would probably switch out of shear annoyance. :-(

High CPU Usage with Flash Player 11

I am not sure what the problem is but ever since I had those issues I went back to flash archive and installed a previous version that did not come with the flash plug in and I never had any problem with it since I am currently using the Adobe flash version 10 plug in with an adobe flash player active X. and I find out it was the new flash plug in that is the issue it suck all your ram. If you get some people who is having the same issues where flash player is duplicating and eating all their ram then ask them to try the version 10 plug in with the flash 11 active x it will work fine. I tried to run the version 10 flash as a complete set but some dynamic site that plays videos require a later version of flash active x to work and will be asking for an update however by keeping the flash 10 plug in there won't be any other issues. Adobe need to find out what is wrong with the new flash plug in and run a comparison with the flash 10 plug in. I hope this will help some user to get over the issues that made my online experience a nightmare for a while too.

The best way to get a resolution is to address your individual issue. Your complaint is that RAM usage is high, which is unrelated to the thread from the guy on Mac that was seeing High CPU usage on high definition video.
In order to fix the issue that you're describing, we need to be able to reproduce it. Please provide the information below, and the results of the basic troubleshooting steps as you work through them. This will help us narrow down the root-cause, and allow us to find comparable hardware in our compatibility lab to reproduce the issue with.
Basic Troubleshooting Info
To help troubleshoot we'll need the following system information:
- Operating system
- Browser
- Flash Player version - http://helpx.adobe.com/flash-player/kb/find-version-flash-player.html
- Antivirus/Anti-Malware software and versions
The first step is to work through the video troubleshooting guide for your operating system, here:
- Windows - http://helpx.adobe.com/flash-player/kb/video-playback-issues.html
- Mac - http://helpx.adobe.com/flash-player/kb/video-playback-issues.htm
When reporting issues with video or audio, it's also helpful to get your system hardware and driver details. Instructions for finding this information can be found here:
- Windows - http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_For_Windows_users
- Mac - http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_For_Mac_OS_users
Finally, sometimes video and audio problems are caused at a lower level and not directly related to Flash Player. I recommend trying both of the links below to see how they perform. If the problem exists with both, then Flash Player is most likely not the culprit as the HTML5 video link does not use Flash Player when playing. You can verify this by right clicking the HTML5 video and looking for the words "About HTML5" at the bottom of the menu.
- HTML5 video - http://www.youtube.com/watch?v=cTl3U6aSd2w&html5=True
- Non-HTML5 video - http://www.youtube.com/watch?v=cTl3U6aSd2we
Thanks!

High CPU usage during 15 acquiring analog input and write to file (suggestion needed)

Helllo everybody,
I have a problem about the usage of CPU now i am using a realtime target (PXI-8186) with Daq (PXI-6259) to get 15 analog signals at the rate of 10kHz
at first i try to get signal at different rate but i found out that all of the channels share the same clock so i get the highest frequency that i desired after that i do
some data manipulation with displaying charts and use shift register to stack data in array of string finally i write the data to spreadsheet every 5 second, by doing this the CPU usage
is always 100% and reduce by the time the file is recordedto 71% or so and then start to increase to 100% again. I think the things that make CPU usage too high are
1. Time loop: because i set the period to be 10ms maybe this is too low.
2. The shift registered: may be it use too much overhead memory but i do not know other method to stack data before writing to a file
3. RAM too low: The RAM of PXI is only 256mb
4. Poor program arrangement: Because i am new to labview the program is not arranging correctly or i may use some inappropriate structure.
My program is very messy sorry about it because i avoid using SubVI and i am new to labview. Please help any suggestion is apperciated. Thanks in advance.
Best regard
Wuttikrai
Attachments:
target save.vi ‏328 KB

It looks like you are writing your data to disk every so often. For that reason, I recommend making it based on the number of samples you have instead of the time. With that you can preallocate your arrays with constants going into the shift registers. You then use Replace Array Subset to update your arrays. When you write to the file, make sure you go back to overwriting the beginning of your array. This will greatly reduce the amount of time you spend reallocating memory and will reduce your memory usage.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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MBP with 10.6.8: CPU usage high, no responsible processes shown in Activity Monitor. What causes this?

After using my computer for some time, CPU usage climbs to about 90% (ca. 65% user / 26% system) and fans run at high speed, but there is no processes that seem to use CPU (other than Activity Monitor itself ~1%).
This has happened a few times recently. It happens when I've used my computer for some time, hours or a couple of days (I usually put my computer to sleep when not using it but rarely shut it down). I've tried to quit all running apps incl. Growl, Dropbox, and anything that could be responsible to this but with no results. Putting computer to sleep for a long time doesn't help, cpu usage will climb instantly after wake up. Restarting system is the only thing that helps.
Most of the time I use my laptop with external monitor, lid closed and connected to power supply. When experiencing this, opening the lid causes fans to slow down, but CPU usage remains high and battery drains quick.
Any ideas what might cause this?
My MBP is 15" model with Core 2 Duo 2,66 GHz (MacBookPro 5,3), OS X version is 10.6.8, all available updates are installed.

Perform a SMU reset.
https://support.apple.com/kb/HT3964
Remove the anti-virus, it's running a root level process all the time that's taking your CPU and it's not necessary as there are no Mac viruses, Apple has the trojan angle covered already.
Always on anti-virus on a Mac is always a source of problems, also is MacKeeper, uninstall that here if you have it.
http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/
If you need to clean the Windows filth off PC files, then use the free, run as you need, ClamXav.
http://www.clamxav.com/
It seems your machine is used in a corporate enviroment, thus likely a rule that anti-virus must be used, you can avoid high CPU usuage by using the ClamXav instead.

High CPU usages

I just got my machine running last week and am getting settled in. I do have a question do you all find that the CPU usages are high in comparison to a P4 2.5GHz with 1 GHz of RAM. I am noticing that things like the windows media player are using 20-30% when running!!! My PVR is using 50-60% as apposed to the P4 I was around 15-20%. Am I doing something wrong or is this normal to see this kind of usages.

watching for idle time isn't really a good comparions you becasue you may have another task loaded that is consuming CPU time that isn't the primary task.
Also if you have cool-n-quiet enable your typical cpu utilization will be higher, becasue the CPU is running at a lower clock speed in general.

I notice that Foxfire 4 sometimes shows 50 to 60% CPU usage for no apparent reason. If I reboot, its back to normal for a few hours. Then the same problem recurrs and I have to reboot again. I have just upgraded to 4.0.1. Don't know if it helps

At the same time, I often see ccsvchst.exe using 30 to 50% CPU to really slow everything down. I checked this with Norton; and they uninstall/reinstalled Norton - three times. I still see this program with excessive CPU usage sometimes. If I reboot, sometimes it helps. Other times, not.

When you have kernel panics, the pertinent information is in the panic report.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
In the Console window, select
DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report.
I know the report is long, maybe several hundred lines. Please post all of it anyway.

Hanging programs, high Finder CPU usage

Since early October 2012, programs such as Firefox, Thunderbird and TextEdit have been repeatedly hanging (Not Responding) for a few minutes at a time. Also, Finder CPU usage sometimes surges to 80% even 100% (via Activity Monitor), but not necessarily at the same time. Wondering if these are related. Running OS 10.6.8 (with latest updates) on early 2008 3.06 GHz Core 2 Duo.
Is anyone else having these problems? Any suggestions?
Thanks!

Hi JB,
See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...
http://support.apple.com/kb/PH7029
Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?
How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.
Open Console in Utilities & see if there are any clues or repeating messages when this happens.
In the Memory tab, are there a lot of Pageouts?
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

IOS 4.x camera high cpu usage bug

Ever since upgrading to iOS 4, I've noticed that periodically my 3GS's CPU usage is higher than normal. Instead of 97% of the CPU or higher being idle, only 85% is higher. This causes the battery to drain at about the same rate as if I'm constantly playing music, so the phone won't last the day. This problem persists under iOS 4.1. The CPU usage can be seen by any number of free apps in the App store, simply search for CPU.
Using an app that uses the location services or turning airplane mode on and off will temporarily drop the CPU back to the normal idle rates, but the problem will return within a few minutes. The only permanent fix is to reboot the phone.
For the longest time I thought it was related to using location services, but I've finally tracked down the problem to using the camera. If any app uses the camera (camera app or 3rd party app), the problem has a high probability of occurring within the next few minutes. If I never use the camera, the problem never occurs. I've pretty much confirmed this by having weeks go by without seeing the issue, then immediately seeing the issue after using an app that enables the camera (such as a bar code reader).
I've reported this to Apple a number of times and they keep either ignoring it or asking my for log files over and over again. Either they can't reproduce it or they're not even trying to reproduce it. Considering how easy it is to reproduce and the fact that I've seen someone post in the battery life thread reporting the same exact thing, the later seems more likely.

Assume you've read threads on draining batteries and random shutdowns. You may be on to something.
My 3GS shuts down now randomly but usually once the battery hits about 30%...the part that sets it off every single time is opening any app that uses the camera!
Once this happens it won't usually come back on without power tethered.
Would love to see Aplle acknowledge this issue and put to rest all the moronic responses on here telling people to stop using their phones as they have been for the last year and turn everything off to save battery.

Curious - CPU usage sometimes high!

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