[Python-ideas] multiprocessing and physical CPU cores count

Antoine Pitrou solipsis at pitrou.net
Thu Sep 12 21:10:04 CEST 2013

On Thu, 12 Sep 2013 20:59:46 +0200
"Giampaolo Rodola'" <g.rodola at gmail.com>
> This is a follow up of a feature request which recently appeared on psutil
> bug tracker:
> https://code.google.com/p/psutil/issues/detail?id=427
> I don't know whether the proposal makes sense for psutil per-se but it
> certainly made me think about multiprocessing.cpu_count() and the fact that
> it currently returns the number of virtual CPUs (physical + logical).
> Given that multiple processes cannot take any advantage of hyper threading
> technology

Of course they can.  The CPU doesn't distinguish between different
kinds of "threads", they can either belong to the same process or to
different ones.



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