[EMAIL PROTECTED] wrote: > I have been reading many of the posting on the GIL and impact on > threading etc. I have found is confusing and would welcome some > clarity on this. > > I understand that embedding the interpreter in a C/C++ application > limits it to one CPU. If the application is multi-threaded (system > threads) in will not use additional CPUs as the interpreter is tied > to one CPU courtesy of the GIL. True or False?
True. More than one CPU can be used if the GIL is released during calls to external libraries, though. Well-written C extension modules and the Python standard library do this where appropriate. Still only one thread can execute pure Python code at a time. > I understand that forking or running multiple process instances of the > above application would make use of multiple CPUs. This is because each > process would have its own interpreter and GIL that is independent of > any other process. > True or False? [...] True. HTH, -- Gerhard -- http://mail.python.org/mailman/listinfo/python-list
