def _update_sw_stas(self, datapath):
"""Update statistics for switches method."""
# Initialization
if switch_stat.get(datapath.dp.id) is None:
alive_ports = []
switch_stat.update({datapath.dp.id: {'alive_port': alive_ports}})
# Update active ports in list
alive_port_list = switch_stat.get(datapath.dp.id).get('alive_port')
for port in datapath.ports:
if port.is_live():
if port.port_no not in alive_port_list:
alive_port_list.append(port.port_no)
else:
if port.port_no in alive_port_list:
alive_port_list.remove(port.port_no)
if switch_stat.get(datapath.dp.id).get('stats').get(port.port_no) is not None:
p_stat = switch_stat.get(datapath.dp.id).get('stats')
p_stat[port.port_no] = None
def _port_stats_reply_handler(self, ev):
"""Handle PortStatsReply from switches method."""
sw_dpid = ev.msg.datapath.id
# self.logger.info('-----------')
# self.logger.info(ev.msg.datapath.id)
# self.logger.info('-----------')
# Initialization
if switch_stat.get(sw_dpid).get('stats') is None:
switch_stat.get(sw_dpid).update({'stats': {}})
if switch_stat.get(sw_dpid).get('weight') is None:
switch_stat.get(sw_dpid).update({'weight': {}})
if switch_stat.get(sw_dpid).get('cost') is None:
switch_stat.get(sw_dpid).update({'cost': 0.0})
if switch_stat.get(sw_dpid).get('load') is None:
switch_stat.get(sw_dpid).update({'load': 0.0})
r = 0
t = 0
e = 0
for stat in ev.msg.body:
if stat.port_no in switch_stat.get(sw_dpid).get('alive_port'):
# Claculate statistics on each active port
# self.logger.info(stat.port_no)
counter_list = [stat.port_no, stat.rx_bytes, stat.tx_bytes, stat.rx_dropped, stat.tx_dropped, stat.rx_errors, stat.tx_errors, stat.collisions]
port_stat = {stat.port_no: counter_list}
p_r = 0
p_t = 0
p_e = 0
if switch_stat.get(sw_dpid).get('stats').get(stat.port_no) is not None:
his_stat = switch_stat.get(sw_dpid).get('stats').get(stat.port_no)
# self.logger.info('%s %s', counter_list, his_stat)
# self.logger.info('rx_byte %d', (counter_list[1] - his_stat[1])/1)
# self.logger.info('tx_byte %d', (counter_list[2] - his_stat[2])/1)
# self.logger.info('drop %d', (counter_list[3] - his_stat[3])/1)
p_r = (counter_list[1] - his_stat[1])/1
p_t = (counter_list[2] - his_stat[2])/1
p_e = (counter_list[3] + counter_list[4] - his_stat[3] - his_stat[4])/1
r = r + (counter_list[1] - his_stat[1])/1
t = t + (counter_list[2] - his_stat[2])/1
e = e + (counter_list[3] + counter_list[4] - his_stat[3] - his_stat[4])/1
weight_list = [p_r, p_t, p_e]
port_weight = {stat.port_no: weight_list}
# Update port statistics
sw_stat = switch_stat.get(sw_dpid).get('stats')
sw_stat.update(port_stat)
sw_weight = switch_stat.get(sw_dpid).get('weight')
sw_weight.update(port_weight)
# self.logger.info('=======')
# self.logger.info('cost function r : %d', r)
# self.logger.info('cost function t : %d', t)
# self.logger.info('cost function r-t: %d', r-t)
# self.logger.info('cost function d: %d', e)
# ts = time.time()
# st = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')
# self.logger.info('time %s', st)
pp = r-t
if r != 0:
# self.logger.info('cost function: %f',float(pp)/float(r))
switch_stat.get(sw_dpid).update({'cost': float(pp)/float(r)})
switch_stat.get(sw_dpid).update({'load': [r, t, e]})