Will multithreading make python less popular?
sturlamolden at yahoo.no
Fri Feb 20 11:36:14 CET 2009
On Feb 20, 12:19 am, Mensanator <mensana... at aol.com> wrote:
> What am I actually seeing? If Python only uses one of the cores,
> why do both light up?
Because of OS scheduling. You have more than one process running. The
Python process does not stay on one core. Try to put CPython into a
tight loop ("while 1: pass"). You will see ~50% use of both cores. If
you had 4 cores, you would see ~25% use.
> Is everything much more complicated (due to
> OS scheduling, etc.) than the simple explanations of GIL?
No. Your Python code cannot use more than one core simultaneously.
It's just that scheduling happens so fast and so often that you don't
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