Re: How to limit CPU usage in Python
On Thu, Sep 20, 2012 at 11:12 AM, Rolando Cañer Roblejo
> Hi all,
> 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? I saw Resource module but I think it is not the module I am
> looking for. Some people recommend to use nice and cpulimit unix tools, but
> those are external to python and I prefer a python solution. I am working
> with Linux (Ubuntu 10.04).
Maximum percentage of CPU used isn't normally something you control.
The only way I know of to do it involves having another process
monitor the thing you want to control and sending signals to stop and
start it (e.g., http://cpulimit.sourceforge.net/).
Typically, you instead want to control the priority (so that higher
priority apps can easily take more CPU time). That's what nice is for
(http://docs.python.org/library/os.html#os.nice). If you want to
limit a process in the same way that ulimit does, then the resources
module is what you want
Is there a particular reason that you'd rather have your CPU sitting
idle, rather than continuing with whatever code is waiting to be run?
I'm having a hard time understanding what problem you might be having
that some combination of setting the nice level and imposing resource
limits won't handle.
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