#!/usr/bin/python
import operator
import hashlib
from threading import Thread

def ticks_all():
  with open('/proc/stat') as f:
    cpu = f.readline().split()
    return (int(cpu[1]), int(cpu[3]))

def ticks_process():
  with open('/proc/self/stat') as f:
    cpu = f.readline().split()
    return (int(cpu[13]), int(cpu[14]))

def do_work():
  d = hashlib.md5()
  d.update('nobody inspects')
  for i in xrange(0, 10000000):
    d.update(' the spammish repetition')

before_all_user, before_all_sys = ticks_all()
before_process_user, before_process_sys = ticks_process()

threads = []
for i in xrange(0, 8):
  t = Thread(target=do_work)
  threads.append(t)
  t.start()
for t in threads:
  t.join()

after_process_user, after_process_sys = ticks_process()
after_all_user, after_all_sys = ticks_all()

print 'delta process: user:', after_process_user - before_process_user, 'sys:', after_process_sys - before_process_sys
print 'delta all: user:', after_all_user - before_all_user, 'sys:', after_all_sys - before_all_sys