> I have a program that needs to create a great deal of > threads. Unfortunately, I cannot seem to find a way to lower > the 1MB default stack size per thread. The threading module > does not seem to support setting the stack size explicitly. > I have 1GB of memory on my system so I can only create about > 1000 threads before I receive the following error trace: > > File "C:\Python24\lib\threading.py", line 442, in __bootstrap > self.run() > File "C:\Python24\lib\threading.py", line 422, in run > self.__target(*self.__args, **self.__kwargs) > File "C:\tagent\globalModule.py", line 190, in shell > self.target() > File "C:\tagent\agent.py", line 132, in runLoop > self.timeSliceEvent(currentTime,delta) > File "C:\tagent\agent.py", line 397, in timeSliceEvent > actorInstance.threadStart() > File "C:\tagent\agent.py", line 117, in threadStart > threading.Thread.start(self) > File "C:\Python24\lib\threading.py", line 416, in start > _start_new_thread(self.__bootstrap, ()) > error: can't start new thread > > Any ideas on how to lower the stack size?
Python's thread module is hard-coded to use Windows' default thread stack size, which according to the docs I have will be the same as the process' primary thread stack size (which is usually set at link time). These same docs also indicate that thread creation fails if all memory for the thread stack cannot be committed (some other OSes don't attempt to commit all stack space on thread creation). If you can find a way to modify the stack-size setting of python.exe this might work for you, but be warned that this could also cause other stack related failures as the primary thread usually requires more stack than other threads. If you're in a position to recompile Python, it doesn't take much to change the thread module's hard-coded thread stack size. In my spare time I've been working on a patch to allow the default thread stack size to be changed programmatically - its mostly complete except for doc updates, and I hope to get it into Python 2.5. ---------------------------------------------------------------------- Andrew MacIntyre \ email: [EMAIL PROTECTED] Planning Branch \ tel: +61 2 6256 2812 Australian Broadcasting Authority \ fax: +61 2 6253 3277 -> "These thoughts are mine alone!" <--------------------------------- > > Chad > > _______________________________________________ Python-win32 mailing list Python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32
