> How is the data shared? Using files or somehow differently? Slices of numeric python arrays
> custom mark-and-sweep garbage collector. This collector collects quite a > bit information while it is running, especially how much non-dead memory > is used currently. This would make it possible to impose a hard limit there. Ok. But this limit would be for the entire app and not per user model. This should be fine, I would just take the penalty of the OS/interpretor than releasing back all the unused memory. > Doable, but harder (and I guess you mean this in a more general way than > just checking during long computations). You would need a transformation > that inserts checks into the PyPy graphs to see whether something is > running too long without ever reaching the interpreter main loop. You > might be better served with having the program run with a timeout. > I think again os based timeout interrupts would work fine? Do you see any downside of using os level interrupts? Any way that the application would not be able to catch them? > You could fix the recursion limit. Again this would be for the entire application and not per user model. > Another thing I can see there is accessing the file system in malicious > ways. Can be fixed on the OS level, I guess. You could not include > things like socket into your PyPy interpreter executable. This is the tricky part. The main python application used a lot of cPython libraries, so not including them in the interpreter was not an option. I was hoping that there would be some other way which could tell the pypy interpreter, before it executes a certain piece of code, that access to the following list of modules ([x, y, z...]) is allowed. > As Holger said, it depends very much on what exactly you want. In PyPy > usually many things are possible and you have to choose the right > possibilities. > Do you know about lunatic Python? http://labix.org/lunatic-python Yes. I'm using a modified version of this library. Vineet ____________________________________________________________________________________ Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html _______________________________________________ [email protected] http://codespeak.net/mailman/listinfo/pypy-dev
