Thanks, I didn't know that multiprocessing Managers could be used with processes not started by multiprocessing itself... I will give them a try. I just need to compute FFTs, but speed is a real issue for me (I am using the results for real-time feedback). To be honest I don't know yet if the FFTs are going to be the limiting step but I thought I may as well give pyFFTW a try and ran into that issue... Antony
2013/9/18 Robert Kern <robert.k...@gmail.com> > On Wed, Sep 18, 2013 at 1:51 AM, Antony Lee <antony....@berkeley.edu> > wrote: > > > > Hi all, > > > > While I realize that this is certainly tweaking multiprocessing beyond > its specifications, I would like to use it on Windows to start a 32-bit > Python process from a 64-bit Python process (use case: I need to interface > with a 64-bit DLL and use an extension (pyFFTW) for which I can only find a > 32-bit compiled version (yes, I could try to install MSVC and compile it > myself but I'm trying to avoid that...)) > > Just use subprocess to start up the 32-bit Python. If you want to use the > multiprocessing tools for communicating data, use a Manager server in the > 32-bit Python to communicate over a socket. > > http://docs.python.org/2/library/multiprocessing#managers > http://docs.python.org/2/library/multiprocessing#using-a-remote-manager > > It is possible that this won't work if the protocol assumes that the > bitness is the same between server and client (e.g. struct.pack('Q', ...)), > but I suspect this is not the case. > > You may also consider writing a small server using pyzmq or similar. I am > guessing that you are just calling one function from pyFFTW and getting the > result back. A simple REQ/REP server is easy to write with pyzmq. Do you > need to use pyFFTW for some specific functionality that is not available in > numpy.fft or scipy.fftpack? > > -- > Robert Kern > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > >
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