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Posted 22 Feb 2007


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CPU Load Control

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3.90 (13 votes)
22 Feb 2007CPOL
Demonstration to control the amount of CPU load used by your computer
Screenshot - img.png


This is a basic MFC program that demonstrates how to retrieve the current CPU load percentage and set it using a high priority thread control loop. I created this project simply because I needed to test another fairly time/buffer critical application and wanted to simulate heavy amounts of CPU load and/or a slower computer. By using this app, you can successfully "steal" away certain amounts of processor instructions to emulate slower or more heavily loaded machines.

It only fully works on single core systems. I personally have a dual core machine, and therefore the one thread that runs in this program can never utilize more than 50% of the "Total Processor Load." I tried launching multiple threads that would hopefully use both cores, but it didn't work - I'm guessing you would have to somehow instruct a 2nd thread to use your second core. Anyway, it wasn't worth it for me to implement, so if anyone wants to add full support for multi-core machines, please post how it's done to others.

Included is a project built using VS 2005. The code is very simple and could be easily added to another project. To retrieve the CPU load percentage, you must include the dependency pdh.lib in your Project->Linker settings.


  • 22nd February, 2007: Initial post


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

Questiongood Pin
bleachli9-Nov-11 5:13
Memberbleachli9-Nov-11 5:13 
GeneralXP is showing two processors Pin
Lokanatha Reddy15-May-07 23:38
MemberLokanatha Reddy15-May-07 23:38 
GeneralCPU Load Ported on Visual C++ 6.0 Pin
cristitomi15-Mar-07 23:54
Membercristitomi15-Mar-07 23:54 
GeneralNot work in one core PC with Windows2000 Professional Pin
AleksMain27-Feb-07 2:24
MemberAleksMain27-Feb-07 2:24 
GeneralRe: Not work in one core PC with Windows2000 Professional Pin
jkhax0r2-Apr-07 6:38
Memberjkhax0r2-Apr-07 6:38 
GeneralMulticore Pin
Jörgen Sigvardsson22-Feb-07 11:00
MemberJörgen Sigvardsson22-Feb-07 11:00 
GeneralRe: Multicore Pin
Vasudevan Deepak Kumar22-Feb-07 18:08
MemberVasudevan Deepak Kumar22-Feb-07 18:08 
QuestionRe: Multicore Pin
jkhax0r26-Feb-07 5:16
Memberjkhax0r26-Feb-07 5:16 
AnswerRe: Multicore Pin
Jörgen Sigvardsson26-Feb-07 7:29
MemberJörgen Sigvardsson26-Feb-07 7:29 
GeneralRe: Multicore Pin
tobywf26-Feb-07 23:54
Membertobywf26-Feb-07 23:54 
GeneralRe: Multicore Pin
Jörgen Sigvardsson27-Feb-07 2:36
MemberJörgen Sigvardsson27-Feb-07 2:36 
GeneralRe: Multicore [modified] Pin
tobywf27-Feb-07 8:56
Membertobywf27-Feb-07 8:56 
GeneralRe: Multicore Pin
jkhax0r28-Feb-07 16:46
Memberjkhax0r28-Feb-07 16:46 
QuestionMaybe this would work? Pin
Ivo Beltchev22-Feb-07 10:59
MemberIvo Beltchev22-Feb-07 10:59 
Haven't tried it myself, but maybe you can use SetProcessAffinityMask and SetThreadAffinityMask to force each of the threads on a specific core.
AnswerRe: Maybe this would work? Pin
Vasudevan Deepak Kumar22-Feb-07 18:09
MemberVasudevan Deepak Kumar22-Feb-07 18:09 
GeneralRe: Maybe this would work? Pin
dongbaek19-Jul-09 22:21
Memberdongbaek19-Jul-09 22:21 

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