100% CPU usage after starting/joining a call

This problem has been persisting for a few months now, and I haven't found a fix. Sometimes when I would start or join a call, the first thread of my i7 would shoot up to 100% usage (Monitored with MSI Afterburner). I originally thought it was because I had an older version of Skype, but I updated to the latest version and still had the issue. To get the usage to go down, I either have to restart the laptop or put it into sleep mode. When I checked the task manager, Skype was only using 0%-2% of my CPU, but System and System Interrupts run at higher usage (6%-7% each). I am running Windows 8.1 on a laptop with the desktop version of Skype. Please note that this also does not happen every time, just on some occasions.
EDIT: It eventually happens, but not always right away.

Yes, you can use NI-DAQmx with Visual C++ and with Mesurement Studio 7 or later you also have Microsoft Visual C++ class libraries for NI-DAQmx.
If you are now developing a application I would advice to move to DAQmx since this the Traditional libraries are nolonger activly developed, we will only be adding new features and hardware to NI-DAQmx, thus for future support of the application it's better to use NI-DAQmx then Traditional NI-DAQ.
For more information on NI-DAQmx see:
http://zone.ni.com/devzone/conceptd.nsf/webmain/ee47b125bb9e053686256fbc0014c384?OpenDocument
Met vriendelijke groet / Kind regards,
Karsten
Applications Engineer
National Instruments

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I now have 10.6.3 and the problem has become worse. I found a similar thread where multiple people had a problem with the kinesis usb keyboard:
http://discussions.apple.com/thread.jspa?threadID=1197549&start=0&tstart=0
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100% CPU usage after games are run

Hi All
Having a Strange problem with iTunes. All works fine unless I play a Steam based game e.g. Counterstrike:source. If I try and launch iTunes after closing a steam game sometimes (but not always) itunes.exe will launch, there is some HD activity, nothing else happens. If I check taskmanager itunes.exe is using 100% of the CPU.
I have tried quitting and closing all possible tasks but iTunes will always launch in the same manner. A log out will not fix it, the only way to get iTunes to work again it restarting the machine.
I have had this problem since the first windows release of itunes. Is it an issue within steam? Is anyone else getting this happen?
Thanks
Dan

Tell the scanning software not to scan the entire iTunes folder. iTunes makes temp XML files every time you play a song. It does this to keep track of times & last date played.
http://discussions.apple.com/thread.jspa?threadID=165247&tstart=0
Or open up a ticket with the antivirus vendor.

Distiller 8 and 9 both locking up, 100 % CPU usage

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Glad to hear all is well. Preference files can cause big problems. Eons
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email, etc. It turned out to be a problem with my preference file when
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100% CPU Usage caused by HMI

Hi everybody:
I'm working with LabVIEW DSC 8.2.1 in a system that monitors many variables of a plant, such a typical SCADA system. For this reason, the use of the graphic tools is highly used on the development of this system. Everything works fine, but I have only one problem.... the usage of the CPU.
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From http://100cpuusage.blogspot.com/
100 Percent CPU Usage when you run programs after you install Windows XP Service Pack 2
CPU Usage 100% Symptoms
When you run some programs, the CPU Usage meter in Task Manager may indicate CPU Usage 100%. When CPU utilization reaches 100 percent, programs will run very slowly or stop responding (hang) and your computer is freezing or crashing.
Noteress CTRL+ALT+DEL to view CPU utilization, click Task Manager, and then click the Performance tab.
These symptoms occur after you install Microsoft Windows XP Service Pack 2 (SP2).
CPU Usage 100% Cause
These problem occurs because of the user interface code that is included in Windows XP SP2. The high CPU utilization is caused by the additional overhead that occurs when the IsWindow function is called by the user interface code.
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:
http://go.microsoft.com/?linkid=6294451
Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Prerequisites
To apply this hotfix, you must have Windows XP SP2 installed.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel. Date Time Version Size File name
30-Mar-2005 19:53 5.1.2600.2643 577,024 User32.dll
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if you still do not know how to Fix CPU Usage 100%?
I suggest you try targeted software - registry cleaner to fix cpu usage 100%
Because there are many cases causing high cpu utilization.
1. If you do a lot of web surfing and are concerned about spyware, adware infecting your machine, they will cause system crashes and CPU utilization reaches 100 percent. Some good registry cleaner has the function of spyware & adware removal.
2. You install many beta version of the software, Drivers are not certified, which resulted in many errors, you get high cpu usage.
3.100% CPU Usage while you use Internet Explorer
4. many unneed Startup Program.
5.Others PC Errors. - DLL errors, runtime errors, Windows-Installer Errors, Windows Startup Errors,paths Broken DLLs, OCX, and ActiveX Components all will cause 100% cpu usage. Your PC will run very slowly.
Registry cleaner can do a complete scan of your entire file system and registry in under 2 minutes! Fix High Cpu Usage. Improve PC Speed By Up to 70%!
http://www.100-cpu-usage.com/ suggest you to download registry cleaner to fix 100% cpu usage too.
PCErrorsfixer.com - Top 3 Windows Registry Cleaners, Improve PC Performance,5 Star Rated. Fix 100% CPU Usage, Runtime Error, DLL Error,Windows Startup Errors,Internet Explorer Errors, Speed Up your slow PC.

High CPU usage after closing a program.

Okay, this is annoying. Doesn't happen on all programs, but too many.
When I close an application, in normal way, alt+f4/press x/file->quit the program quits, BUT, "ghost" application starts, which raises to 100% CPU usage. Then I have to close it via sigterm/sigkill. This has happened (atleast) with mplayer, nvidia-settings (which doesn't even start, but cpu usage raises to 100% anyway, and ghost application starts) and WoW thru Wine. Now, I have absolutely no idea what is going on, and I've found nothing on google.
I think it became after I upgraded to 2.6.29 kernel, it's 2.6.30 now and still the same.
A little help please

The nvidia-settings starts, as it shows on system monitor (htop, etc) but I am not getting the window, and cpu usage raises to 100% instantly. Terminal output:
dfizzle@ohai ~$ nvidia-settings
The valid values for 'XVideoTextureContrast' are in the range -1000 - 1000
(inclusive).
'XVideoTextureContrast' can use the following target types: X Screen.
The valid values for 'XVideoTextureSaturation' are in the range -1000 -
1000 (inclusive).
'XVideoTextureSaturation' can use the following target types: X Screen.

[10.1.2] Protected Mode causing 100% CPU Usage/Extra Processes on Win XP 32-bit?

Hello,
I'm not 100% sure if the two are related, but I have a client who was seeing 100% CPU usage using Adobe Acrobat Reader X 10.1.2 on Windows XP 32-bit and Firefox 11. The acrord32.exe process would hang around after closing the main window and eventually leading to tons of processes and his CPU at 100% use. I believe disabling Protected Mode may have solved this issue. I didn't see it documented anywhere so I figure I'd post about it here and see if anyone else was seeing this resolved as well.

I noticed 'only' 50 % CPU usage. Not during Reader usage with ~ 20 %, but it started after closing main window.
Two instances of acrord32.exe were created - the moment pdf was opened - of which one was using zero CPU.
After opening another pdf, 2 more processes were created, so 4 in total. Have seen 2 of them using 100 %.
Issue is easily recreated.
This is all in 10.1.3, no fix from Adobe, only THE fix from you: turning of Protected Mode!
After which now only one proces is created, with 1 to 3 pdf documents opened at same time.
This instance is then nicely shutdown after the last pfd is closed.

Recently FireFox often has been causing 100% CPU usage and locks up until it finishes the process (various ones). Clearing cookies/cache didn't help. Any ideas?

Windows 2000 SP4, 1g RAM, Firefox 9.0.1
We keep IE6 and Firefox open simultaneously for 2 different mail accounts. Firefox was always much faster even with 3 or 4 tabs open, but for the past couple of weeks when trying to update a screen the CPU suddenly goes to 100% usage and of course nothing will move until the particular process is finished. Closing one or more tabs does not help. If I close Firefox completely with Task Manager CPU usage goes back down to nil. After restarting Firefox CPU usage may or may not go back up depending upon whether it tries to continue the previous task that was locking it up.
It did not do this with Firefox 3.6 but then again it didn't happen immediately after updating to 9.0.1 either.

100% CPU usage occurred most often toward the end of the working day when busy trying to print on-line postage. We don't have any memory-consuming plugins but according to the knowledge base articles Firefox memory usage can gradually increase during the day even if you do nothing. It seems that may be the problem so we close and restart Firefox more often now as that usually fixes the problem. However, if we get stuck on a particular website update that causes the CPU to to go 100%, we can always start Firefox without previous tabs so the update will stop, or simply use a different browser until we have time to let the computer play games with itself.
So our workaround of restarting Firefox turns out to be the final solution (until we find something better - will post it if we do). Vic

100% CPU usage... does anyone else get this?

Here is my code. I would have simplidied it for you... but I honestly have no idea where it went wrong.
One second it is running fine, the next it starts taking up 100% of my CPU cycles. I can't figure out what I did to it to make it do this... nothing I added creates an infinite loop or infinite threads. It's just... weird.
The code is probably too big for anyone to look at and tell me what's wrong, but can someone else download it and tell me if you also get 100% CPU usage? It needs to be run on Windows... it uses a couple JNI calls that are Windows-specific. Those calls were the first place I looked when trying to find the problem, but I have not changed that part of the code for a long time, and it has never been a problem before.
Don't run the bat file... just navigate to the Watchdog2 directory and do 'java Watchdog'.
Are there any tools that can help me figure out where the program is getting hung up? It's not freezing at any specific spot... just moving super slow and taking up 100% of my CPU. I'm so confused...
Message was edited by:
L4E_WakaMol-King

Nevermind!
Sorry for the trouble. The problem was that last time I compiled the code, it reverted back to and older version of a class I had compiled days ago. Why it did this is totally beyond me... but it did, and it just so happens that the old version of that class combined with the new version of my program were the perfect recipe for an infinite loop.
Seriously, if you are in inveterate debugger, you might get a good laugh out of this. I've spent the last week and a half trying to find a way to set the Windows console into cbreak mode (single character processing rather than line-at-a-time processing), and I finally managed to do it by writing some c code and putting it into a DLL with the JNI. So now my program (which runs from the console) can process each character as it is entered rather than waiting for a line return. The older version of the class that got reverted was one that used System.in rather than the input stream generated by the socket. I had set it to System.in for testing purposes, and apparently that testing version is the one it got reverted back to. So combine the two, and you have a console that is feeding System.in each character as it is pressed and a socket wrapper that is listening infinitely. It was a mess... but an uncannily serindipitous mess...
Ahh... debugging... good time...

DotMac Translator 100% CPU usage

During the last few weeks I have a process called dotMac translator running and it's taking 100% CPU usage, I can kill the process off but it just comes back after about 10 minutes.
Does anybody have any ideas on what's causing this and how to fix it.
Thanks
MacBook Mac OS X (10.4.10)

run the 'top' utility and see what the processes are. You will certainly see some oracle procs in the list. can you post back the output here so we can review it?
Also run the command vmstat 10 130 whilst the cpu is at 100% and post back.
rgds
alan

My laptop (win7 2ghz, 1gig) has 100% cpu usage with itunes installed (even when not running itunes) since the upgrade. i had to uninstall. tried installing but still the same problem. my daughter wants the new ipad, but this is a serious problem.

when itunes upgraded my laptop went to 100% cpu usage. only solution was uninstall. have tried itunes again as my daughter wants the new ipad. still same problem tho so not keen to spend £400 on new pad without pc support. anyone help? (ps been using ipod touches 1 and 2, been great source of pleasure for my two girls, but cant sync them, so using the little shuffles for music, syncing to an old version of itunes on an old netbook - had the sense to switch off upgrades when the new version went wrong)

Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 & above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
http://support.apple.com/kb/TS4123?viewlocale=en_US

Queue consumer stops with 100% cpu usage

I'm trying to use Berkeley DB queue with transactions. When I tested what happens when transactions with DB_APPEND are aborted I found that while it works and DB_CONSUME correctly skips over rolled back records, unfortunately extents that have those records are never deleted, which causes database to always grow. Next I tried DB_CONSUME with database opened using DB_INORDER flag and it seems there's a serious regression in Berkeley DB that causes it to loop indefinitely with 100% cpu usage when it encounters a rolled back record. I tested various versions and found that this bug doesn't happen with 5.1.29, but it is reproducible with 5.2.42, so this regression might have been introduced in 5.2. I have also tested 5.3 and 6.0, and both have this behavior. There may be something wrong with the way queue records are rolled back, one indication of that would be that in 5.1.29 doesn't have neither of the two problems I found with DB_QUEUE: extents are deleted after being consumed, and there are no issues when consuming with DB_INORDER either.
You can find Python code to reproduce this issue here:
https://gist.github.com/snaury/027a3c546f5b0a62a440
Sorry for using Python and not e.g. C++, but it's a lot shorter that way.

We have looked at the issues and they are valid. We will roll the fixes out for this in our next release of BDB. The test case was very useful and really helped to speed the process up. If you have any questions, please contact me directly at [email protected] Thanks again for bringing this to our attention.
thanks
mike

100% CPU usage by iCal

For some reason my iCal application uses 100% of CPU. What can I do to avoid it?

I had a similar problem with iTunes.
Here's the link to what fixed my problem immediately. Please note: my problem was resolved following just the three steps pasted below. The original link has additional steps that may be necessary, although I did not employ them, and my problem of 100% CPU USAGE is gone!!! Thank God!
URL source: http://www.hotcomm.com/faq/FAQ_ResetWinsock.asp
Good Luck
Copyright (c) 2009 1stWorks Corporation. All rights reserved.
This article gives instructions for resetting Winsock on Windows XP and Windows Vista:
Reset Winsock (Vista)
To reset Winsock in Vista:
1.Click the Windows Start button.
2. Type Cmd in the Start Search text box and press Ctrl-Shift-Enter (keyboard shortcut to run Command Prompt as Administrator). Click Continue to allow elevation request.
3. Type netsh winsock reset in the Command Prompt shell, and then press the Enter key.
URL source: http://www.hotcomm.com/faq/FAQ_ResetWinsock.asp

Run program in 100% cpu usage

hi all,
does any body know how to set the java program to utilize 100% cpu usage? thanks!

class Empty implements Runnable {
    Empty() {}
    public void run() {
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        new Thread(new Empty()).start();
        new Thread(new Empty()).start();
        new Thread(new Empty()).start();
}Not sure why you would want to do this though?

How to control timing without 100% CPU usage

I wanted fine control over timing (in windows XP), but ran into two problems.
Problem 1: If you use the Swing timer, or Thread.sleep, the resolution is limited to 10 or 11 milliseconds. There is a Thread.sleep(millis, nanos) function, but I tested it and it still has 11ms resolution in WinXP.
Problem 2: If you use jbanes's GAGE timer, CPU utilization will always be 100%.
Solution: Use a hybrid technique. I would love to have nanosecond resolution AND low CPU utilization at any speed (and if you have any suggestions, please post them) but for now:
class /*name*/ extends Thread{
public void run(){
          setDelay(delaySettings[speed]); //Set "delay" to the desired delay in nanoseconds
          long nanos;
          while(true){
               if(running){ //"running" is a boolean that can pause or unpause the game
                    nanos=System.nanoTime()+delay;
                    tick(); //Do the game logic and graphics for one frame
                    if(delay>11000000){ //If the system timer can handle it
                         try{sleep(delay/1000000);} //delay/1000000 gives millis
                         catch(Exception e){System.out.println("Caught sleep exception: "+e);}
                    }else{ //use a nanotimer (cpu-expensive)
                         while(System.nanoTime()<nanos){}
               }else{ //it is paused, so wait a bit
                    try{sleep(50);}
                    catch(Exception e){System.out.println("Caught sleep exception: "+e);}
//The rest of your code
}If your desired delay is greater than the system timer resolution (here, I have it set at 11,000,000 nanoseconds, or 11ms) then you can use the Thread.sleep(milliseconds) call, which will have approximately 0% CPU utilization until the thread wakes up. Theoretically, you could use this time for another thread, but at the very minimum, your computer should use less power / generate less heat. If your desired resolution is smaller than 11,000,000 nanoseconds, it goes into a loop that checks nanoTime()... which gives you 100% CPU usage, but is very accurate. This works pretty well if you want to control the framerate dynamically (I use the "-"/"=" buttons to adjust speed) and it handles "pause" events, though I'm sure there are better ways to do that.
Note: The timing granularity above 11ms for this technique is probably 11ms, though the code could be modified to provide nanosecond granularity at any speed.
Note 2: I found this to run 3% faster than when I used the GAGE timer.
-Cherry

Pause the game when u alt-tab away ^_^
Thats what most native fullscreen games do (the
non-networked kind atleast)Good idea, but the crux of the issue is really the underlying scheduler which allows
the thread to race.
How to "Eliminate" 100% CPU usage.
Tony's Law of the exec constant. <<<<"Any thread or process running on a non-preemptive operating system MUST NOT use blocking
IO, and MUST preempt itself at leat 20MS per iteration."
The reason it is called a constant is because it is the minimum time needed to ensure
the underlying operating system gets enough CPU cycles to function correctly.
Every milliseconds below this increases exponentially the chance of locking up or
crashing despite the speed of your system.
Most people who program do not realize the the implications of running under defective schedulers
such as the one provided with MS windows where, for example, you can block on a socket, and
hang your whole system.
>>> Do NOT use Thread.sleep() <<< but instead use Object.wait();
Do not use blockng IO. If you have to use java.io, use available() to make such you ONLY
read the exact amount of bytes you need without blocking and make sure to prempt
yourself at least 20MS per iteration.
ie:
InputStream inputStream;
while(working)
Object waitObject = new Object();
int readCount = 0;
int availableBytes = 0;
int totalBytes = 10;
   while(readCount < totalBytes)
      if((availableBytes = inputStream.available())!=0)
          read() (the # of Bytes available)
      else
          synchronized(waitObject)
               waitObject.wait(200);        // 5X per second poll
                waitObject.notifyAll();
Using wait() removes the current thread from being scheduled; Thread.sleep()
leaves the Thread on the schedule list. wait() releases all monitors allow other
threads to have them; THread.sleep() does not.
The 100% CPU issue is especially bad under NT BTW.
If you do this not only will your CPU usage go to negligible, but you
will never again lock your system because of it.
Good Luck!
(T)

100% CPU usage after starting/joining a call

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