Re: Distinguish real vs. virtual CPUs?

[Dr. David Alan Gilbert]

* Dave Jones (davej@xxxxxxxxxx) wrote:
> Compare the 'physical id' fields of /proc/cpuinfo, and count
> how many unique values you get.
> Ie, on my dual+ht, I see..
> 
> physical id     : 0
> physical id     : 0
> physical id     : 3
> physical id     : 3
> 
> Which indicates 2 real CPUs split in two.

Is this guarenteed to be safe on all architectures?  Parsing
/proc/cpuinfo accross different architectures can be a bit hairy;
I'm thinking when non-x86 start to have multiple hardware threads
people might want to do the same thing.

Dave
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    | Running GNU/Linux on Alpha,68K| Happy  \ 
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