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RE: How to limit CPU usage in Python

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Paul Rubin wrote:
> Rolando Cañer Roblejo <rolando.caner@cnic.edu.cu> writes:
> > Is it possible for me to put a limit in the amount of processor usage
> > (% CPU) that my current python script is using? Is there any module
> > useful for this task?
> 
> One way is check your cpu usage once in a while, compare with elapsed
> time, and if your % usage is above what you want, sleep for a suitable
> interval before proceeding.
> 
> Tim Roberts: reasons to want to do this might involve a shared host
> where excessive cpu usage affects other users; or a computer with
> limited power consumption, where prolonged high cpu activity causes
> thermal or other problems.

The problem is that checking the CPU usage is fairly misleading 
if you are worried about contention. If your process takes up 
100% of CPU and nothing else needs the resource, does it matter? 
I would not want to sleep *unless* something else needs the 
resource. Of course, there might be a good/easy way of checking
usage + contention, but I am unaware of any off the top of my
head.

On *nix you should just set the appropriate nice-ness and then 
let the OS handle CPU scheduling. Not sure what you would do 
for Windows--I assume OS X is the same as *nix for this context.



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Thread

How to limit CPU usage in Python Rolando Cañer Roblejo <rolando.caner@cnic.edu.cu> - 2012-09-20 11:12 -0400
  Re: How to limit CPU usage in Python Tim Roberts <timr@probo.com> - 2012-09-22 13:55 -0700
    Re: How to limit CPU usage in Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-22 23:24 -0400
  Re: How to limit CPU usage in Python Paul Rubin <no.email@nospam.invalid> - 2012-09-22 16:05 -0700
    Re: How to limit CPU usage in Python Dwight Hutto <dwightdhutto@gmail.com> - 2012-09-22 23:04 -0400
    Re: How to limit CPU usage in Python Tim Roberts <timr@probo.com> - 2012-09-24 21:09 -0700
    RE: How to limit CPU usage in Python "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-09-27 16:58 +0000
    Re: How to limit CPU usage in Python Jerry Hill <malaclypse2@gmail.com> - 2012-09-27 13:07 -0400

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