socket 多线程安全、粘包问题

脚本如下：

# -*- coding:utf-8 -*-
'''
@Author: Stefan

@File:  server_listener.py

@Date:  2016-11-09

If you execute this test script on servers, you have to modify the system parameter below:
sysctl net.ipv4.tcp_tw_recycle=1
'''
import sys
sys.path.append('/export/servers/app/xxxx')
import time
import socket
import threading
import multiprocessing
from src.xxxxclient.xxxx_client.lib.socket import header_pack, receive
HEADER_LENGTH = 16
DEFAULT_TCP_PORT = 1104
DATA = {'xxxx_ADMIN': 'thread_keepalive'}

count_of_processes = range(1)
# DO NOT modify the parameter below
count_of_threads = range(1)

# Unit: second
execute_time = 60

def loop(times):
        """

        :return:
        """
        time_start_now = time.time()
        time_future = time_start_now + execute_time
        while True:
            if time_start_now > time_future:
                break
            else:
                time_start = time.time()
                S = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                # S.connect(('127.0.0.1', DEFAULT_TCP_PORT))
                S.connect(('x.x.x.x', DEFAULT_TCP_PORT))
                header, data = header_pack(DATA, HEADER_LENGTH)
                S.sendall(header+data)
                header, result = receive(S, HEADER_LENGTH, 1024)
                S.close()
                time_end = time.time()
                time_used = time_end - time_start
                print "Thread lasted %.2f sec. Status: %s" % (time_used, result)
                time_end_now = time.time()
                time_gap = time_end_now - time_start_now
                time_start_now += time_gap

def multi_threads():
    """

    :return:
    """
    threads_list = list()
    for i in count_of_threads:
        t = threading.Thread(target=loop, args=str(count_of_threads[i]).split())
        threads_list.append(t)

    for i in count_of_threads:
        threads_list[i].start()

    for i in count_of_threads:
        threads_list[i].join()

class muliti_process(multiprocessing.Process):
    """

    """
    def __init__(self):
        """

        :return:
        """
        multiprocessing.Process.__init__(self)
        self.processes_list = list()

    def run(self):
        """

        :return:
        """
        for i in count_of_processes:
            p = multiprocessing.Process(target=multi_threads,)
            self.processes_list.append(p)

        for i in self.processes_list:
            i.start()

if __name__ == '__main__':
    p = muliti_process()
    global_start = time.time()
    p.start()
    p.join()
    global_end = time.time()
    global_used = global_end - global_start
    print "==================\nTotal %.2f sec" % global_used