It seems the mutiprocessing module is not Mac compatible? The documentation states: "It runs on both Unix and Windows." I guess Unix could include Mac. But when I run the below test code, I see only one Python process running in activity monitor.
This is getting more confusing.
Depending on the values of the two ranges I sometimes see 4 processes running, and sometimes only 1. But even when 4 processes are indeed running, the sum of their cpu load never gets above 100%, which seems to indicate they don't actually run on separate cores.
import multiprocessing as mp
import math
#import numpy as np
def cube(x):
a=1
for i in range(1,100000000):
# a=np.random.rand(1)[0]
a=math.cos(i)*a
return x**3, a
pool = mp.Pool(processes=4)
results = [pool.apply(cube, args=(x,)) for x in range(1,7)]
print(results)This is getting more confusing.
Depending on the values of the two ranges I sometimes see 4 processes running, and sometimes only 1. But even when 4 processes are indeed running, the sum of their cpu load never gets above 100%, which seems to indicate they don't actually run on separate cores.
