python multiprocessingを使って並列処理を行う

import multiprocessing

if __name__ == "__main__":
　　　　p1 = multiprocessing.Process(name="プロセス名", target=実行する関数, args=(引数,))

RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:

            if __name__ == '__main__':
                freeze_support()
                ...

        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.

import multiprocessing
import time

def worker(t):
    for n in range(5):
        time.sleep(t)
        print("%s %d回目の実行" % (multiprocessing.current_process().name, n+1))

if __name__ == "__main__":
    # 2秒ごとに実行
    process1 = multiprocessing.Process(name="process1", target=worker, args=(2,))
    # 6秒ごとに実行
    process2 = multiprocessing.Process(name="process2", target=worker, args=(6,))

    # process開始
    process1.start()

    # process開始
    process2.start()