cpu.py

# MIT License
#
# Copyright (c) Fredrik B
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE

import func
import sys
import getopt
import time
import math
import multiprocessing
import threading
from multiprocessing import Value

DEFAULT_NUMBER = 10000000

def main(argv):
    func.write_header()
    
    number = DEFAULT_NUMBER
    opts, args = getopt.getopt(argv, "n:")
    cpu_count = func.get_cpu_count()

    try:
        for opt, arg in opts:
            if opt in ("-n"):
                number = int(arg)
    except:
        pass

    if number < 0:
        number = DEFAULT_NUMBER

    if number < 10000:
        cpu_count = 1

    ranges = func.get_ranges(number, cpu_count)
    total_prime_count = 0
    procs = []
    values = []

    func.g_running = True
    spinner_thread = threading.Thread(target = func.write_spinner)
    start_time = time.time()

    for x in ranges:
        value = Value('i', 0)
        proc = multiprocessing.Process(target = func.crunch_range, args = (value, x.f, x.t), daemon = False)
        procs.append(proc)
        values.append(value)
        proc.start()

    print("crunching primes from number " + str(number) + " using " + str(cpu_count) + " cores")
    spinner_thread.start()

    for x in procs:
        x.join()

    for x in values:
        total_prime_count += x.value

    func.g_running = False

    stop_time = time.time()
    seconds = math.floor(stop_time - start_time)
    spinner_thread.join()

    print("\r", end = "")
    print("found " + str(total_prime_count) + " primes in " + str(seconds) + " seconds")

if __name__ == "__main__":
    main(sys.argv[1:])