using profilehooks with classes derived from multiprocessing.Process

[lebedov]

Is there some way to use profilehooks to profile the body of a class derived from multiprocessing.Process? The following code doesn't seem to report any function calls:

import multiprocessing as mp
from profilehooks import profile
import numpy as np

class MyProcess(mp.Process):
    def __init__(self, x): 
        super(MyProcess, self).__init__()
        self.x = x 

    @profile
    def run(self):
        return np.linalg.pinv(self.x)

if __name__ == '__main__':
    p = MyProcess(np.random.rand(100, 100))
    p.start()

(One can obviously profile the contents of the run() method using profile/cProfile directly, but I'm curious whether the the convenience of profilehooks can be exploited in the above situation.)

[mgedmin]

The simplest way would probably be to use @profile(immediate=True). I tested it with your code example; it seems to work fine.

I admit that I don't quite understand how multiprocessing works. It doesn't seem to be executing any top-level module code, or run any atexit hooks (even when registered in the child process).

It would be good to add a note about this to the documentation. I'll keep this issue open until that's done.

[lebedov]

Thanks - confirming that your suggestion works with Python 2.7.6.