From: TongKe Xue <tongke@...>
Date: 2007-07-08T10:55:47+09:00
Subject: Re: CPU/Memory limiting

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I think there is a misunderstanding.
My goal is not to enforce these limits at compile time.

My goal is to enforece these limits at run time.

You exceed the memory limit? I don't allow you to allocate more memory.
You exceed your cpu slice? I swap you out and run another thread for a
while.

On 7/7/07, M. Edward (Ed) Borasky <znmeb@cesmail.net> wrote:
>
> TongKe Xue wrote:
> > Hey Everyone,
> >
> >  I'm working on a massive simulation project (like worldforge). I need
> to
> > be able to allow users to script objects in the world. I am thinking of
> > ussing Ruby as my scripting language of choice. However:
> >
> >  (1) I need to be able to limit the memory usage of the object.
> >  (2) I need to be able to limit the CPU cycle usage of the object.
> >
> >  I.e. I don't want users to use my game to calculate digits of PI.
> >
> >  Is there a way (or an existing implemntation of Ruby) to let me create
> > these light-weight tasklets/threadlets/processlets (there's too many
> > objects
> > to have a UNIX process for each object) such that I can limit the
> > memory/cpu
> > usage on each?
> >
> >
> > Thanks,
> > --TongKe
> >
>
> I don't think it's possible to use *any* Turing-complete scripting
> language in such a manner, let alone Ruby. You'd be better off designing
> your own language based on finite-state machines, for which you *can*
> impose such control.
>
>

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