how many processors

Emilio Casbas ecasbas at unav.es
Thu May 10 07:03:25 UTC 2007


Jim Canfield escribió:
>    Ray Van Dolson wrote:
> 
>  "type 4" will count available slots regardless of the CPU existing.  How
>  about this one...
> 
>  # grep physical /proc/cpuinfo
> 
>  You should have unique ids for each physical CPU.  I don't have a dual
>  core at my disposal but it works for hyper threading.
> 
>  -Jim
>     
> 
>  Interesting.  If you actually look through the information from the
>  type 4 second, I'm guessing it would be clear to the eye that there is
>  or isn't a processor installed though, correct?
> 
>  Sounds like your way is the easiest though.
> 
>  Ray
> 
>   
> 
>    True. Curiosity got the best of me when I ran your "type 4" method and 2
>    returned when I knew I only had one CPU installed...after looking at the
>    output, you are right, it's clear the second processor is not installed.
> 
>    ...I'm surprised no one has mentioned the "open the case" option :)
> 
>    -Jim


Another possibility could be:

#more /proc/cpuinfo
and look the "physical id" feature.

By this way with two processors hyper threading, you'll see:
	4 processors: two with "physical id"=0 plus two with "physical id"=3

So you could assume that there are 2 real processors.

Thanks
Emilio C.




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