Replace the 'spawn' start method with 'fork' start method for multiprocessing, on MacOS with python>=3.8#27317

Merged

gfwm2013 merged 2 commits intoPaddlePaddle:developfrom

gfwm2013:multiprocessing

Sep 17, 2020

Commits on Sep 15, 2020

Replace the 'spawn' start method with 'fork' start method for multiprocessing, on MacOs when python>=3.8
gfwm2013
committed
Replace the 'spawn' start method with 'fork' start method for multiprocessing, on MacOS with python>=3.8
gfwm2013
committed