Python thread

Prasad, Ramit ramit.prasad at jpmorgan.com
Fri Sep 2 00:21:37 CEST 2011


>So what exactly does threading module do, if it doesn't create a subprocess.
>Does each thread have its own stack and PC.
>What advantage would a threading module provide over sequential execution.

I believe it merely simulates multiple processes through scheduling (like the CPU).

From http://docs.python.org/library/threading.html: CPython implementation detail: Due to the Global Interpreter Lock, in CPython only one thread can execute Python code at once (even though certain performance-oriented libraries might overcome this limitation). If you want your application to make better of use of the computational resources of multi-core machines, you are advised to use multiprocessing. However, threading is still an appropriate model if you want to run multiple I/O-bound tasks simultaneously.

Ramit


Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
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