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-   -   top: number of CPUs (https://www.linuxquestions.org/questions/linux-newbie-8/top-number-of-cpus-288982/)

naijaguy 02-11-2005 12:27 PM

top: number of CPUs
 
Why is it that when you run top, it looks like there are double the number of CPUs on the machine? E.g. on a 1-processor box it shows two CPUs, and on a 2-processor box, it shows four, like down below:


CPU states: cpu user nice system irq softirq iowait idle
total 18.8% 0.0% 20.5% 0.1% 0.4% 0.6% 59.2%
cpu00 13.8% 0.0% 4.5% 0.0% 0.1% 2.1% 79.1%
cpu01 16.2% 0.0% 22.2% 0.7% 1.1% 0.0% 59.5%
cpu02 35.9% 0.0% 42.4% 0.0% 0.3% 0.3% 20.8%
cpu03 9.3% 0.0% 13.0% 0.0% 0.0% 0.0% 77.5%

Blinker_Fluid 02-11-2005 12:38 PM

Hyper-threading turned on?

naijaguy 02-11-2005 12:46 PM

We're not sure--how would we find out?

sgrayban 02-11-2005 12:52 PM

Your boxes the CPU and/or memory sticks will say "Hyper-thread" on it.

Blinker_Fluid 02-11-2005 06:36 PM

Quote:

Originally posted by naijaguy
We're not sure--how would we find out?
It's a bios setting.


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