old_contents: '''
  1. set packet to 4096
  python tcp.server.py 1990 4096 >/dev/null
  
    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                       
   5157 winlin    20   0  157m 5780 2808 R 100.0  0.3   0:34.11 python tcp.client.py 1990 4096                                                                                
   5140 winlin    20   0  157m 5932 2824 S 28.2  0.3   0:09.84 python tcp.server.py 1990 4096 
  
  ----total-cpu-usage---- -dsk/total- ---net/lo-- ---paging-- ---system--
  usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
   20   5  63   0   0  12|   0   144k| 245M  245M|   0     0 |2597  2896 
   21   6  63   0   0  10|   0  4096B| 251M  251M|   0     0 |2714  3015 
  '''
  import socket, sys
  if len(sys.argv) <= 2:
      print("Usage: %s <port> <packet_bytes>"%(sys.argv[0]))
      print("   port: the listen port.")
      print("   packet_bytes: the bytes for packet to send.")
      print("For example:")
      print("   %s %d %d"%(sys.argv[0], 1990, 4096))
      sys.exit(-1)
  
  listen_port = int(sys.argv[1])
  packet_bytes = int(sys.argv[2])
  print("listen_port is %d"%listen_port)
  print("packet_bytes is %d"%packet_bytes)
  
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  
  s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
  print("setsockopt reuse-addr success.")
  
  s.bind(('', listen_port))
  print("bind socket success.")
  
  s.listen(10)
  print("listen socket success.")
  
  b = ''
  for i in range(0, packet_bytes):
      b += str(i)
      
  while True:
      conn, addr = s.accept()
      while True:
          try:
              conn.send(b)
              print("send %d bytes"%len(b))
          except Exception, ex:
              print("ex:%s"%ex)
              break
      conn.close()
  
new_contents: '''
  1. set packet to 4096
  python tcp.server.py 1990 4096 >/dev/null
  
  ----total-cpu-usage---- -dsk/total- ---net/lo-- ---paging-- ---system--
  usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
   20   5  63   0   0  12|   0   144k| 245M  245M|   0     0 |2597  2896 
   21   6  63   0   0  10|   0  4096B| 251M  251M|   0     0 |2714  3015 
  
    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                       
   5157 winlin    20   0  157m 5780 2808 R 100.0  0.3   0:34.11 python tcp.client.py 1990 4096                                                                                
   5140 winlin    20   0  157m 5932 2824 S 28.2  0.3   0:09.84 python tcp.server.py 1990 4096 
  '''
  import socket, sys
  if len(sys.argv) <= 2:
      print("Usage: %s <port> <packet_bytes>"%(sys.argv[0]))
      print("   port: the listen port.")
      print("   packet_bytes: the bytes for packet to send.")
      print("For example:")
      print("   %s %d %d"%(sys.argv[0], 1990, 4096))
      sys.exit(-1)
  
  listen_port = int(sys.argv[1])
  packet_bytes = int(sys.argv[2])
  print("listen_port is %d"%listen_port)
  print("packet_bytes is %d"%packet_bytes)
  
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  
  s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
  print("setsockopt reuse-addr success.")
  
  s.bind(('', listen_port))
  print("bind socket success.")
  
  s.listen(10)
  print("listen socket success.")
  
  b = ''
  for i in range(0, packet_bytes):
      b += str(i)
      
  while True:
      conn, addr = s.accept()
      while True:
          try:
              conn.send(b)
              print("send %d bytes"%len(b))
          except Exception, ex:
              print("ex:%s"%ex)
              break
      conn.close()
  
subject: use tcp server