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As a fun exercise, what is the best way to maximize the unix CPU load average without actually consuming lots of resources (CPU cycles or memory)?

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Via OS-specific mechanisms. –  Ignacio Vazquez-Abrams May 18 '13 at 2:58
    
Let's suppose this is on modern day Linux. –  Victor Liu May 18 '13 at 3:00
    
Why don't you patch the kernel so that it lies about the CPU load average? –  Dan D. May 18 '13 at 3:37
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closed as not a real question by random May 18 '13 at 3:55

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2 Answers

up vote 1 down vote accepted

This question is covered on Stackoverflow: Artificially modify server load in Ubuntu

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Last week I wanted to create backup from my HDD I mount it to my old linux machine after that I run tar cvjf command to create and compressed my hdd! My system has celeron CPU and I think it's older that 6 years. It's done after 48Hours and CPU works 99% but my memory didn't use very much maybe 50Mb.

Now there are many solution for your question.

Another one is to calculate Factorial of one number!!! (Big Number)

Edit:

I write a simple C program like below:

#include <stdio.h>
void main() {
for ( int i = 0; i < 10000000000000; i++);
}

Then I compiled it with GCC command and opened 5 terminals and executed them! below photo shows my load average. It's 5!!!!! Notice: My program depends on your CPU. I test it with Pentium M !

enter image description here

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What I meant was that I didn't want to perform computationally intensive tasks. These examples all peg the CPU. –  Victor Liu May 18 '13 at 3:16
    
Can you please give me an example? –  Sepahrad Salour May 18 '13 at 3:18
    
Well, I can't think of one that doesn't peg the CPU but increases the cpu load average. Hence the question. –  Victor Liu May 18 '13 at 3:27
    
Please read my edited post. Hope this helps. –  Sepahrad Salour May 20 '13 at 9:01
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