[concurrency] Inside the Python GIL

Jeremy McMillan jeremy.mcmillan at gmail.com
Fri Jun 12 21:45:43 CEST 2009


Proof is in the pudding. If you can cook up a load test, under what  
conditions can you soak up all of your CPU's cycles?

On Jun 12, 2009, at 12:39 PM, skip at pobox.com wrote:

>
>     Jeremy> I'm not sure I understand how to distinguish between I/ 
> O bound
>     Jeremy> threads and CPU bound threads.
>
> I don't know that we can (people writing bits of Python which  
> operate on
> threads).  I suspect a useful distinction though is that an I/O  
> bound thread
> mostly gives up the CPU to wait on an I/O device, while a CPU bound  
> thread
> is mostly "evicted" from the CPU by the OS scheduler.  (Though I  
> sort of
> suspect you already understand this textbook definition.)  Is that  
> what
> you're referring to by "not sure I understand"?
>
> Skip
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