High CPU usage applet

Mackenzie Morgan macoafi at gmail.com
Fri May 8 04:53:30 UTC 2009

On Friday 08 May 2009 12:40:04 am Timo Sirainen wrote:
> Somewhat relevant, yes, but I think people talking in that page don't  
> understand correctly the root cause of the problem. Linux scheduler is  
> good enough nowadays that even lots of processes all eating 100% CPU  
> don't make the system unusable. The problem comes from when some  
> process eats all the memory and starts forcing other processes to swap.
> I just tested this actually. I created 100 processes running an  
> infinite loop, causing the system load on a 2 core machine to hit 100.  
> It was a bit sluggish, but still perfectly usable.

Quick question:
On a dual-core machine, does 100% CPU mean 100% of *both* cores or 100% of one 
and 0% of the other?  

I'm pretty sure I've seen top report 105% for a process before, so I thought 
100% on a dual core was really only half of the processing power.

Mackenzie Morgan
apt-get moo
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