Python threading (was: Re: global interpreter lock not working as it should)

Martin v. Loewis martin at v.loewis.de
Sun Aug 4 21:34:29 CEST 2002


a-steinhoff at web.de (Armin Steinhoff) writes:

> >  Just because they're POSSIBLE
> > doesn't mean they necessarily HAPPEN.  It just means the OS's
> > scheduler can decide to switch threads there if it wants to.  It might
> > not want to.
> 
> Interesting :) IMHO, scheduler rules are event (IRQ, timers) and
> priority driven ... so there is no room for 'may or may not'

There is certainly room. If priorities are adjusted dynamically, it is
difficult to predict whether a thread switch will occur - since the
priorities may change depending on other load of the system.

Regards,
Martin



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