100% CPU needed

My machine is a 1.8 GHz P4, running Windows 2K and Mozilla
Firefox 3.0.3. I recently installed the latest Flash player for
Mozilla. I am getting really crappy performance. For example,
playing this MSNBC video clip:
http://www.huffingtonpost.com/2008/10/06/olbermann-special-comment_n_132456.html
takes 100% of the CPU. This is playing it after the download
has completed. I can't play it in streaming mode because whenever
the end of the buffer is reached the playback stops while more
bytes are downloaded.
Surely a simple video clip shouldn't need 100% of a P4?!
Any suggestions?
Gib

gibbogle wrote:
> My machine is a 1.8 GHz P4, running Windows 2K and
Mozilla Firefox 3.0.3. I
> recently installed the latest Flash player for Mozilla.
I am getting really
> crappy performance. For example, playing this MSNBC
video clip:
>
>
http://www.huffingtonpost.com/2008/10/06/olbermann-special-comment_n_132456.html
> takes 100% of the CPU. This is playing it after the
download has completed.
> I can't play it in streaming mode because whenever the
end of the buffer is
> reached the playback stops while more bytes are
downloaded.
> Surely a simple video clip shouldn't need 100% of a P4?!
> Any suggestions?
> Gib
Even tho the Adobe minimum recommended specs are 1Ghz
processor or faster, 1.8 is considered
rather slow especially when comes to full screen websites and
video. I complain about some
websites performance running 3.4ghz and 4gb rams, so imagine
your CPU is really getting dated
if you want to enjoy the latest websites and all the features
it comes with. There really isn't
any software solution for you, only hard ware upgrade will
improve the performance.
Best Regards
Urami
"Never play Leap-Frog with a Unicorn."
<urami>
If you want to mail me - DO NOT LAUGH AT MY ADDRESS
</urami>

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Oracle.exe is consuming 100% cpu o windows

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Lightroom is very slow, utilizes 100% CPU, then freezes or closes program. How do I fix it?

I am having a problem with Lightroom 5 being very slow, utilizing 100% CPU, then freezing or closing the program. How do I fix it?
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I talked to HP briefly about CPU updates for my HP PC. He said I probably do not have a problem but suggested I run self-diagnostics and maybe buy a new CPU anyway.
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I'm running LR with no speed issues on an Intel 17-860 quad core with about the same performance as your AMD Phenom II X6 1045T Processor. My system is also an HP, which originally had a single 1TB 7200 HDD. I've since added a second 2TB Black Caviar HDD, which provided no significant difference in LR's performance.
AMD processors do not implement hyper-threading and don't need it. I'd start debug by process of elimination:
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3) Remove your Internet connection and turn off all Antivirus and firewall programs.
4) Open LR and under Catalog Settings set 'Standard Preview Size' to 1440 (slightly larger than your display width). Under the Metadata tab here make sure 'Automatically Write changes into XMP is NOT checked.
4) Create a 'New Catalog,' Create a new folder and add about 10 raw image file copies to it for testing, and Import it into the new catalog. In the Import module make sure under File Handling 'Render Previews' has 1:1 selected. Wait until all Preview building has completed in the Library module.
Try editing these image files inside the new catalog as you were previously.

This new version of FireFox is making me nutz! It is SUCKING 100% CPU time almost constantly. I could just pull my hair out. I wpdated once a month or so ag

I tried to add this in the topic already open but it kept sending me through the unending rabbit holes!
My question is: How do I figure out what release I was on, get rid of this one and got back to a functional firefox that moves in realtime. I already did all the reset and etc.... I just want to go back to the speed I had. This halting , hanging up misery of a browzer is Sad. I have had firefox for years and always recommended it ..... BUT NOT ANY MORE. I agree with the other poster ... there should be a rollback feature. Peoples time has value and right now FireFox is sucking the value down a rabbit hole.
See Below Comment Feedback submitted before I finally got here:
This new version of FireFox is making me nutz! It is SUCKING 100% CPU time almost constantly. I could just pull my hair out. I wpdated once a month or so ago and it slowed down..... but the latest update before I did the reset really slowed me down. I came here to fix it a couple of dayz ago and did the reset firefox and now it IS RUNNING SO POORLY AND SLOW I AM ABOUT TO KILL IT OFF MY MACHINE!!! Yes that is me yelling - and it happened in SSSSSSSSSSSSS LLLLLLLLL OOOOOOOO WWWWWWWWWW Motion. I have run all the security scans and cleanups ---this needs a fix ASAP!!! PS: The hang ups and slowness is EVERYWHERE I go. I only get speed doing programs not connected to ON LINE.

Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

Firefox 15.0.1 stops responding (100% cpu) when a link opens in a new window.

Whenever I click a link that is designed to open in a new window Firefox goes straight to 100% cpu usage and I have to go through the Windows "end now" sequence to close the program. I've tried opening one of the links in a new window but I think it was done in java not html (not sure if all the links are java when this happens as that's the only one I've tested). Not sure what details someone might need but this is on my Mom's older laptop with Windows XP Media Center Edition Ver. 2002 Service Pack 2. Hmmm just saw the SP2 will try to update and see what that does though I don't think that's the issue.

So what is happening or not happening now ? The problem computer is your Moms, but I assume your own computer works ok. Have you tried that on the same internet connection as your Mom uses & visiting the same sites?
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I suggest you try the Firefox Reset feature on your Mom's computer,
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** back up the Firefox profile [[Back up and restore information in Firefox profiles]]
* follow the instructions in the following article, after reading the caution about what will be lost
**[[Reset Firefox preferences to troubleshoot and fix problems]]

100% CPU using LabView 7.1 and DSC module

Seven years ago I used BridgeView and PXI to execute a project, and the results were so good that after that initial system, I installed one more using BridgeView, and three more using LabView 7.1.
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Application problems were suspect from the very first time this problem appeared, but I was unable to identify the source, if any. I used PROFILE VI's and apparently the write/read tags were taking all the processor resources. However, changing the routines and disabling communications, and optimizing CPU intensive programs never solved the CPU overload.
Until now, I was aware of only one system showing this erratic behavior. But today I went to check another system, with a totally different application. This one is used to measure the thickness of the steel sheet on a rolling mill. Is not so resource-intensive, but the maintenance folks told me that every time they turned off this particular system, they always had problems trying to turn it on.
I was suspecting of a PLC-communication related issue, but what I found turned my alarms on. I turned off the system, which was fully functional, and turned it back on, and there it was, CPU load at 100%!. Is exactly the same problem that I have on the welder. This system has a PXI-8184, a PXI-1042 chassis, Windows XP, one PXI-6030E, one PXI-6713 and one PXI-6533. I battled for 20 minutes to put the system back in normal conditions.
I specified every single board, installed everything and programmed all the applications. The BridgeView applications have never showed anything like this. I am using the DSC (Datalogging and Supervisory Control Module) on both applications, and the Lookout Protocol Drivers are communicating to Modicon PLC's.
Please, I need help to solve this issue. I believe none of your actual Knowledge Base "100% CPU" articles apply to my case...
Thanks in advance...
Antonio Jimenez
[email protected]

Thanks for your reply...
Yes, sometimes I have the feeling that the systems works again because some file or database gets initialized after so many reboots.
Intentionally I turned off all the events and alarm logging to disk. Also the historical data logging is disabled. This is done by code, every time the main VI is started. This was included precisely to save CPU processing power. However, I am communicating to PLC's, and of course I have to declare variables inside the citadel database to make the communication possible.
Right now I can't have access to the application, because the mill is rolling, but during the next maintenance stop I will check the database location and size, and I could change the directory location the next time the fault comes up.

Sessions with Event "class slave wait" taking 100% CPU

Hi experts,
I have an issue in an 11.2.0.2 RAC database with 2 standby nodes that are driving me nuts.
All started when I've been told there are 2 Oracle processes consuming too much CPU in the environment.
I found 2 processes which takes 100% CPU each. These processes are Oracle processes into the DB and checking them out although they are registered in v$process and v$session, there is nothing related to them in v$bgprocess so I could not find out which oracle processes started these 2 OS processes.
The view v$session shows them ACTIVE in the event "class slave wait". There aren't too much information about this event, at least I failed to find...
Using dbms_monitor and dbms_system to create trace events did not create any tracefile. Only ORADEBUG was able to create events but with nearly no information inside the trace files.
Questions I need to have answered or at least hints that I can follow to find the answer:
1) what is causing the CPUs to be consumed at 100%? Which process?
2) Why does these processes are using that much of CPU?
3) What can be done to safely get over it?
Honestly I don't know where else to look at except trying to get some help. Could someone give me a hand please?
BR,
Lauro Ojeda
Edited by: LauroOjeda on 26/01/2013 06:44

Hi Pal, thanks for your reply!
Here are the answers:
1. If it is RAC there is no such construct as a "standby node" and you say you have two of them. Please be specific ... is this RAC or Data Guard or a combination? Or do you have a three node cluster with all services pointing to only a single server wasting all of the resources of the other three?
A: This is a combination of them. We have 2 nodes in a RAC environment shipping logs to two physical standby databases in another site.
2. Two processes can not be at 100% of CPU any more than I can be 200% awake. Please show us how you arrived at this conclusion, on what hardware and operating system, and include a formatted (read the FAQ to learn how) extract showing what you are seeing.
A: top in Linux shows two oracle processes consuming 100% (or nearly of it) of 1 CPU each. This is a 16 cores server (each primary node) so 2 of these are working on full capacity to service the described processes.
3. What processes? Name them and again run a SQL statement and post the output so we can see what you are looking at.
A: Like I said before I failed to find which background process they belongs to as there are no indications of them in v$bgprocess and in v$session/v$process either. I can see them in v$process and v$session but again, there are no indications of for which bg process they belong to.
4. Is anything slow? Are there any problems with the system or are you only reacting to two numbers you think are too high?
A: No, system is not slow because of that but the client wants to investigate and have it sorted as it is not normal.
Additionally I found a bug in metalink which seems to be the culprit, but I'm unsure yet. This is Bug 12929268 : HIGH CPU ON ORA_O00N PROCESS
Is any other information that I may provide you?
Thanks for help!
Lauro Ojeda

Oracle.exe consuming 100% CPU on windows and database hang

Hi all,
every time my oracle database is hanging when the application run, the problem is the oracle.exe consum 100% CPU but not memory and the server hang and the dabase is going to inaccessible, we need to restart oracle instance service or server to bring the databas eback to normal but it's not permanent because the problem occurs once the application turn on.
Checking the log file i found the below error every time:
My database version is 9.2.0.7.0
OS: Windows 2003 Server Standard Edition Service Pack 2
RAM: 3,5Gb
CPU: Inte Xeon 3.20 GHz
ORA-00600: internal error code, arguments: [kghuclientasp_03], [0xBFEADCE0], [0], [0], [0], [], [], []
ORA-29913: error in executing ODCIEXTTABLEFETCH callout
ORA-29400: data cartridge error
KUP-04050: error while attempting to allocate 163500 bytes of memory
ORA-06512: at "SYS.ORACLE_LOADER", line 14
ORA-06512: at line 1
Fri Mar 05 05:35:15 2010
Errors in file e:\oracle\admin\optprod\udump\optprod_ora_5876.trc:
ORA-00603: ORACLE server session terminated by fatal error
ORA-04030: out of process memory when trying to allocate 8389132 bytes (pga heap,redo read buffer)
ORA-04030: out of process memory when trying to allocate 8389132 bytes (pga heap,redo read buffer)
ORA-04030: out of process memory when trying to allocate 8180 bytes (callheap,kcbtmal allocation)
Thank you
Lucienot.

Is this a new application on this database?
Has it run well in the past?
I have had this happen before on a 32bit Windows server. Our problem was a poorly written procedure that kept pegging the cpu to 100%. You should be able to figure out what SQL is being used that is causing this problem, it will be the Top Working SQL most likely.
I also had this problem on a Logical Standby server which was trying to apply SQL to the SYS.AUD$ table. As soon as SQL Apply was started, the CPU went to 100%. Once I truncated that table, the cpu usage went back to normal. Not sure what you are using to monitor your database but if you can, try to find out what SQL is running when your CPU goes to 100%.

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

Not sure if its related, but probably, since it happened right after...I just transferred everything from my quad core mac pro to my new 8-core Mac Pro. Everything went well, but now Distiller 8 starts and then sits and gives the beachball of death, and one of the cores shows 100% cpu usage. (I have that utility that shows memory used, CPU usage, etc.). I hadn't bought Acrobat 9 yet so I downloaded it and installed, and Distiller 9 does the EXACT same thing. The ONLY thing I can call an "error message" is that I can see in the window after it launches is "Error in /Library/Application Support/Adobe PDF/Settings/PDFX4 2007.joboptions:/CheckCompliance out of Range."
That message may have been there whole time, even when it worked, though. I don't know. At any rate, I need distiller working! Any ideas?

Glad to hear all is well. Preference files can cause big problems. Eons
ago, in the 1980s, I used a communications program called Red Ryder. I
loved the program. After it was updated to a new version (it might have
been called White Knight by that time), I started to have terrible
problems. I wrote to their technical support. They couldn't duplicate
the problem. It couldn't happen etc. I eventually got a little hot under
the collar. After all, if I couldn't use my modem, I couldn't check my
email, etc. It turned out to be a problem with my preference file when
converted to the latest version, that was causing the problem. Since
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...Mike

NIO Selector.select() enters a 100% CPU infinite loop on interruption

This issue is only reproducible in Windows.
When a thread is calling Selector.select() and the other thread interrupts the selector thread, Selector.select() enters an infinite loop taking up CPU time. All other JDKs I've tried including IBM 1.5 / 1.6, SUN 1.5 / 1.6 simply returned 0 when its interrupted. I think JRockit needs to behave similarly, without 100% CPU consumption. Here's the test code:
import java.nio.channels.Selector;
public class Main {
public static void main(String[] args) throws Exception {
final Thread mainThread = Thread.currentThread();
final Selector s = Selector.open();
new Thread() {
@Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// Ignore.
System.out.println("interrupt()");
mainThread.interrupt();
}.start();
System.out.println("select()");
s.select(5000);
System.out.println("success");
s.close();
Expected result:
select()
interrupt()
success
Actual result:
select()
interrupt()
<stuck with 100% CPU consumption>
Version:
JRMC-3.0.3-1.5.0 - build R27.6.0-50_o-100423-1.5.0_15-20080626-2105-windows-ia32, compiled mode
JRMC-3.0.3-1.6.0 - build R27.6.0-50_o-100423-1.6.0_05-20080626-2105-windows-ia32, compiled mode

Hi,
This looks like a bug. Please open a support ticket and request a patch if you need a fix asap. If you can wait we will fix this in an upcoming release. Thank you for your help

All programs using 100% CPU, freezing, crashing, -10810, -600, and -1712 errors

Okay, so. I have a Macbook Pro from December 2012, a little over a year old.
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Startup Disk - Macintosh HD
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For the last two months, my computer has been seriously out of whack.
I'm constantly having to refresh finder
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The dock freezes
Constant error messages: 1712, 10810, 600
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Overall, the problem seems to be that I can't do more than one thing at a time -- I can't take a screenshot if more than two programs are open, I can't open DMG files, I can't open Spotify if any Creative Suite program is open. I've been watching the activity monitor, and it seems like each program is trying to use 100% CPU, which doesn't seem right. I have to close every program to work in Photoshop, which makes me miss calls and emails.
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I've looked on other forums and it seems like the Mail app typically causes problems, but I don't even use it, I use Sparrow.
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Launch error -10810 in Mavericks
I have the same issue since a couple of days. Nothing that I found in the community (rebuilding launch info using Onyx or manually deleting the apple.com-launch prefs) has helped me so far. Only some apps are affected (PasswordWallet 4.7.4 among them).
I can launch it once and it will run fine as long as it’s open. Next time it refuses to open displaying the error -10810 message instead. I trash the app and use a fresh one off the vendor’s dmg file I downloaded and the sequence repeats.
MacPro 2.8 QuadCore Intel Xeon, 16 Gig RAM, Samsung SSD 840 PRO Series HD plus 3 more regular 3,5“ HDs, Mavericks 10.9.3

Client process (uniengd) on the Calendar server is consuming 100% CPU usage

The Calendar client bits in the Communicator 4.5 release (Calendar Build 981008)
are suspect of hanging the Calendar server when the end user uses the off-line
feature. The behavior seen will be that a cpu will start climbing and could
reach 80-100% of usage, which will cause the response time for all other end
users to be extremely slow and may not even accept any new logins.

The patch for these bits is available via the Smart Update (Windows and Mac) web
site:

http://home.netscape.com/smartupdate/su1_40.html
 Or you can download the complete version from
http://home.netscape.com/download/selectplatform_1_361.html

For Unix platforms, you will need to download the compressed tar file
(available from http://help/filelib.html#nscal)
and reinstall it.
NOTE: To verify that you are executing a patched version, in the
Calendar client:
Windows platform
 Help menu pulldown, About Netscape Calendar, make sure it has Build
981104 or higher.
 Mac platform
 Select the file from your desktop
 File menu pulldown, Get Info. Make sure has a date of 121698, version
4.51 or later.
 Unix platform
 Help menu pulldown, About Netscape Calendar, make sure it has is Version
4.51 or higher

The procedure for determining which user of Calendar is causing the server's cpu
hang is as follows:
<OL>
<LI>Using your favorite monitoring tool on the server, note the PID
 (process ID) of the uniengd process that is consuming
80 - 100% cpu activity.
<LI>Change directory to /users/unision/db/tmp/PID#
<LI>Execute the command "strings" on all the files in the directory
 (there are usually not very many):

 # strings *

 Near the end of the output, you will see the user's name.
<LI>You can now kill the uniengd process on the server:

 # kill PID# (note: do not use the kill -9 unless absolutely
 necessary!)

<LI>Contact the name of the user whose process you looked up and determine
 what version of Calendar client they are using. Immediately inform
 them of your procedure on upgrading to the correct version.
</OL>

Hi TrondWH,
Thanks for contacting Microsoft.
Currently, would you please try cleaning boot the server and test how the issue goes. Cleaning boot can exclude some third-party application affect. Following are the detailed steps about clean boot:
Log on to the computer by using an account that has administrator rights.
Click Start, type msconfig.exe in the Start Search box, and then press ENTER to start the
 System Configuration Utility.
On the General tab, click Selective Startup, and then click to clear the Load startup items check box. (The Use Original Boot.ini check box is unavailable.)
On the Services tab, click to select the Hide all Microsoft services check box, and then click Disable all.
Click OK, Choose Don’t show this message again and then click Restart.
Please check if the issue is still the same.
Please let me know the result.
Best regards,
Sophia Sun
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Shockwave Flash 11.6.602.168 100% CPU usage

Hi,
Our computer has 100% CPU usage every time we get in websites that utilize Flash, or watch youtube.
Browser: FF 19.0
Flash 11.6.602.168
Computer: HP Pentium 4, 2.8 GHz, 3G memory, up-to-date BIOS and other drivers.
Graphic card: EVGA GeFprce 6200
Windows 7 32 bits
This window is freshly installed, has AVG on. We do not have many software's installed, except MS Office. All fans and CPU are clean. The computer runs fairly fast: we tried opening multiple FF tabs simultaneously, plus Excel, Word, Solitaire etc. without any problems. However, whenever we get into websites with Flash, the CPU uasage goes to 100% and stays there. Memory usage has always been stable, around 30%. We have tried the following steps, but it hasn't gotten better:
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- Updated all drivers and applications: FF, Flash, Graphic card etc.
- Turned ON and OFF hardware acceleration for both Flash and FF, also tried to turn one On, the other OFF, and vise versa.
- Disabled all add-on's, extensions and Plug-in's, except Flash.
- Uninstalled and reinstall FF and Flash; restarted several times.
- Temporarily turned OFF protected mode.
- Uninstalled FF, Flash, then installed IE 9, then Flash for IE: didn't work.
- Uninstalled IE 9, Flash, then installed IE10 then reinstalled Flash for IE: also didn't work.
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Examples of websites that we have had problems with: pbskids.org, barbie.com, and other school websites for kids to do homework or watch youtube.
While in many websites such as CNN.com, yahoo.com, when we opened it, the CPU usage did spike, but came back to 1-5% within 5 seconds.
This computer is for our kids. Do we really need to buy an i5 or i7 computer so the kids can play and do homework? Or is there any other way that we can do?
Thank you

Moving to the Using Flash Player forum, as this isn't specific to the Beta.
In the Youtube video, if you right-click and choose Show Video Info, it will show you whether you're using Hardware Acceleration for both Video Rendering and Video Decoding.
If you're seeing Software Rendering and/or Software Decoding and you're watching a high-def video, it's going to use a ton of CPU.
Do you see similar behavior in other browsers? (Chrome, IE) The Flash Player distributions are actually quite different for each browser. It would be an interesting data point.

100% cpu AE7 using Magic Bullet Look Suite 2.0

Hi
My pc is over 2Ghz and has 2 gigs of Ram and a high speed hard drive. My video is onboard but usually does very well with video rendering.
The only problem I seem to have is with Look Suite 2.0. I dont bother trying out the latest because it doesnt work with onboard video.
Anyway, 2.0 used to work perfectly fine for the 2 weeks I was rendering. But, recently it started giving me the "unknown exception caught by look suite" error. There does not seem to be a real fix for this.
But I monitored task manager for awhile while compiling projects. Loading effects filters like Curves, Twixtor and others didnt phase the CPU a bit. But after loading Look Suite and going through the presets, all of suddent the cpu went 100% and never came back down as long as AE7 is open. Even if I disable the plugins nothing changes.
So I tried saving the project with the plugins disabled in the composition. Then closed AE and reopened the project. Instant 100% cpu. Next, I deleted the Look Suite plugin from the composition. Reopened the project and everything was perfectly fine.
LOOK SUITE has some kind of incompatibility issue either with AE7 or another plugin that was running. I cannot be sure.
But the bottom line is this. Who's responsible? Adobe or Red Giant?
Red Giant doesn't seem to have a clue what to do. I dont want to upgrade to a version that works only with higher end graphics. I tried changing memory settings in AE and it really isnt needed. I am guessing the "unknown exception" is caused from the CPU overload because it pegs out the cpu while rendering and uses more and more of the page file as it runs, until it finally fails. But if Looks Suite wasn't already loading up on the cpu I would not have a problem. And, a week ago it wasn't hogging the resources. SOmething went snap.
Sorry for the long rambling.

Nope, CPU usage and RAM usage are more or less unrelated. CPU usage is merely dependent on the number of threads/ sub-threads/ handles fired by a program and since the Celeron D only handles a limited number of them, it is quite predictable that it will frequently peak an queue requests it cannot process immediately, when e.g. on a Xeon the same operation would barely register. Updating the processor may improve performance, but it mostly depends on the kind of effects you are using. If they are not particularly computationally intensive like several color correction effects, the benefits will be minor. if on the other hand you use a lot of Blurs and Glows for instance, the speedup may be considerable. Regardles of this, having lots of RAM and processing power is never a bad idea ;-)
Mylenium

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 needed

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