On Wed, 07 Feb 2007 14:44:08 -0700, Jason Martin <[EMAIL PROTECTED]> wrote:
>
> On Linux, grep /proc/cpuinfo for lines beginning with "processor".
> Take the line with the biggest number and add one to it. Kinda
> kludgey, but that's the first thing that comes to mind.
>
> On OS X, the command "sysctl hw.ncpu" will give it to you.
>
> On Solaris, I believe that "procinfo" will give it to you, but I
> haven't worked on a Solaris box in a while, so that may be old.
>
> On Windows, I have no clue.
>
> I think that on some x86 platforms, you can actually get this
> information with the "cpuid" assembly instruction. I'll look that up
> and send you some C code to do it if it's possible.
Perhaps somebody should write a function
number_of_cpus()
and put it in a file sage/misc/parallel.py and send me a patch. It would
default to 1 if it can't figure it out using heuristics as
above. Also, it would be customizable, i.e., there could be
a variable one could set in that file that would make number_of_cpus()
just return the value of the variable.
William
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