[Stackless] Population simulation in Stackless

[sdfrost at UCSD.Edu]

Dear Aaron,

Thanks for the link.  I've a quick question regarding your scheduler that I 
hope isn't too dumb.  When I start it up on a two processor machine, the load 
isn't balanced; I get the equivalent of 1 cpu's worth (which might be 100+0 or 
90+10 or 65+35).  Given that tasktest.py balances just fine, what restricts the 
balancing in world_new?

Thanks!
Simon

> Aaron Watters wrote:
> 
> > I went ahead and added a modified version of
> 
> > http://www.xs4all.nl/~bsarempt/python/worldsim.html 
> 
> at location: ftp://ftp.reportlab.com/tmp/stackless_experiments.zip
> 
> >
> > updated for aug 2002 stackless and with qt dependancies removed.
> > I think I didn't change the semantics (?).
> >
> > It was easy, but immediately pointed out problems with my "real time
> > scheduler".  Here is the section of notes.txt that talks about it:
> >
> > """
> > The "real time scheduler" doesn't work as well as it should.
> > I think the problem is that
> >
> >    task.run()
> >
> > doesn't do what I expected -- I thought that when the task
> > blocked control would return to the task that called "run",
> > but it doesn't -- it goes to some other task.  I think this
> > is wrong.  schedule() can pick any task but run() should return
> > to the task that that invoked "run".  ymmv.
> >
> > As it is the "scheduling task" is not guaranteed to get invoked
> > before a low priority task runs instead of a higher one, so
> > real time priorities don't necessary get observed.
> > """
> >
> >   -- Aaron Watters
> >
> > Simon Frost wrote:
> >
> >> Dear Stackless list,
> >>
> >> Has anyone played with Boudewijn Rempt's population simulation, 
> >> http://www.xs4all.nl/~bsarempt/python/worldsim.html , (which used the 
> >> old Stackless) in the new Stackless?  I'd like to do something 
> >> similar, with individuals being modelled as threads...
> >>
> >> Thanks!
> >> Simon 
> >
> ps: sometimes two mistakes are better than one.  I forgot the location 
> in the first message
>   and also forgot to copy the stackless list, thus accidentally wasting 
> less bandwidth.
> 
> 


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