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Add links to understand the GIL

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Ryan Day
2011-12-30 00:50:36 -05:00
parent f2a0af5541
commit d139b348a3
1 changed files with 13 additions and 3 deletions
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docs/scenarios/speed.rst
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@@ -11,7 +11,13 @@ Context
The GIL
-------
`The GIL`_ (Global Interpreter Lock) is how Python allows multiple threads to operate at the same time. Python's
memory management isn't entirely thread-safe, so the GIL is requried to prevents multiple threads from running
the same Python code at once.
David Beazley has a great `guide`_ on how the GIL operates. He also covers the `new GIL`_ in Python 3.2. His
results show that maximizing performance in a Python application requires a strong understanding of the GIL,
how it affects your specific application, how many cores you have, and where your application bottlenecks are.
C Extentions
------------
@@ -20,8 +26,8 @@ C Extentions
The GIL
-------
`Special care`_ must be taken when writing C extensions to make sure you register your threads
with the interpreter.
C Extentions
::::::::::::
@@ -56,4 +62,8 @@ Multiprocessing
---------------
.. _`PyPy`: http://pypy.org
.. _`PyPy`: http://pypy.org
.. _`The GIL`: http://wiki.python.org/moin/GlobalInterpreterLock
.. _`Understanding GIL`: http://www.dabeaz.com/python/UnderstandingGIL.pdf
.. _`New GIL`: http://www.dabeaz.com/python/NewGIL.pdf
.. _`Thread State`: http://docs.python.org/c-api/init.html#threads