[Python-Dev] Fixing the GIL (with a BFS scheduler)

[Lennart Regebro]

On Sun, May 16, 2010 at 22:52, Victor Stinner
<victor.stinner at haypocalc.com> wrote:
> I didn't followed last development around the GIL. Can you explain me why
> Python should have its own scheduler whereas each OS has already its own
> scheduler?

Because the GIL locks and unlocks threads, in practice, it already
have. But the scheduler is so simplistic it ends up fighting with the
OS scheduler, and a large amount of CPU time is used up switching
instead of executing.
Having a proper scheduler fixes this.

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Lennart Regebro: Python, Zope, Plone, Grok
http://regebro.wordpress.com/
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