gunicorn workers config based on physical cpu

gunicorn.py

from sys import platform
if platform == "linux" or platform == "linux2":
    from sh import grep, wc, cat
    # cat /proc/cpuinfo | grep 'core id' | wc -l
    cpu_count = wc(grep(cat('/proc/cpuinfo'), 'core id'), '-l')
elif platform == "darwin":
    from sh import grep, sysctl, awk
    # sysctl -a | grep machdep.cpu.core_count | awk '{print $2}'
    cpu_count = awk(grep(sysctl('-a'), 'machdep.cpu.core_count'), '{print $2}')

if cpu_count:
    globals()['workers'] = 2 * int(cpu_count) + 1