Date: Tue, 16 Dec 2008 15:29:42 +0100 From: Michel Talon <talon@lpthe.jussieu.fr> To: freebsd-questions@freebsd.org Subject: Re: Python with many threads Message-ID: <20081216142942.GA14998@lpthe.jussieu.fr>
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Otto wrote: > Exception in thread 30: > Traceback (most recent call last): > File "/usr/local/lib/python2.5/threading.py", line 486, in > __bootstrap_in= > ner > self.run() > > The number of errors increases rapidly with even bigger number of > threads. > Is there any way I can increase the maximum number of Python threads? Nothing limits the number of concurrent threads. Personnally i have checked i can run Grub Next Generation Python Client with 600 threads without any problem. niobe% uname -a FreeBSD niobe.lpthe.jussieu.fr 7.0-STABLE FreeBSD 7.0-STABLE #0: Tue Jul 22 10:31:01 CEST 2008 niobe% python Python 2.5.2 (r252:60911, Jul 5 2008, 13:44:44) Recall that python threads are just native threads, but these threads are protected from trashing the python state by a single lock, the GIL, which is released when you do IO. This allows to effectively thread IO, but not python computation. The FreeBSD thread library has no particular limitations, you can run hundreds or thousands of threads without much problem, for example under Java. -- Michel TALON
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