On Mon, May 27, 2013 at 5:35 AM, Ian Kelly <ian.g.ke...@gmail.com> wrote: > I'm pretty sure that CPython uses the GIL regardless of platform. And > yes you can have multiple OS-level threads, but because of the GIL > only one will actually be running at a time. Other possibilities > include:
6) It's spinning in a function that has released the GIL. Python threads can certainly execute concurrently; they just can't be manipulating Python objects. Most of the I/O functions will release the GIL before doing a potentially-blocking operation, and some CPU-heavy functions can do the same (I'm given to understand that numpy does this) - just depends on having a long job that involves no refcounted objects. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
