def run(pkt_size, gap_ms):
util.ping_test()
switch = Switch(config.active_config)
switch.reset_flow_table()
control_client = ExpControlClient('mumu.ucsd.edu')
control_client.execute('RESET')
control_client.execute('SET learning False')
pktgen = Pktgen(config.active_config)
pktgen.low_level_start(pkt_count=50000, flow_count=50000,
pkt_size=pkt_size, gap_ns=1000000*gap_ms)
try:
time.sleep(20)
except KeyboardInterrupt:
pktgen.stop_and_get_result()
sys.exit(1)
pktgen_result = pktgen.stop_and_get_result()
pkt_in_count = control_client.execute('GET pkt_in_count')
pktgen_rate = pktgen_result.sent_pkt_count / pktgen_result.running_time
pkt_in_rate = pkt_in_count / pktgen_result.running_time
control_client.execute('RESET')
return (pktgen_rate, pkt_in_rate)
def run(flow_mod_gap_ms):
util.ping_test()
switch = Switch(config.active_config)
switch.reset_flow_table()
control_client = ExpControlClient('mumu.ucsd.edu')
control_client.execute('RESET')
control_client.execute('SET auto_install_rules False')
control_client.execute('SET manual_install_gap_ms %s' % flow_mod_gap_ms)
control_client.execute('SET manual_install_active True')
# Send a starter packet to trigger packet-in. Doesn't matter what port it
# goes to, as long as it has the IP address of what would have been the
# pktgen host.
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto('Hi', (config.active_config.source_ip, 12345))
# Let the whole system run for a while. We cannot check for TCAM status;
# that'd sometimes take forever when the switch is busily processing flow-
# mods, and it'd probably affect the flow-mods. We check the TCAM
# afterwards.
util.verbose_sleep(60)
control_client.execute('SET manual_install_active False')
# Gather stats about flow-mod. The flow-mod gap may not be accurate.
flow_mod_count = control_client.execute('GET flow_mod_count')
flow_mod_start_time = control_client.execute('GET flow_mod_start_time')
flow_mod_end_time = control_client.execute('GET flow_mod_end_time')
flow_mod_rate = flow_mod_count / (flow_mod_end_time - flow_mod_start_time)
# Wait for the switch to stabilize before asking it for stats.
util.verbose_sleep(80)
print 'Dumping table...'
# Parse flow tables. Search up to the last point of a TCAM-write, which
# signifies a full TCAM. Up to that point, we count the total number of
# rules added.
rule_list = switch.dump_tables(filter_str='')
tcam_rule_count = 0
total_rule_count = 0
print 'Parsing', len(rule_list), 'rules...'
for rule in rule_list:
total_rule_count += 1
if 'table_id=0' in rule:
tcam_rule_count += 1
if tcam_rule_count == 1500:
break
control_client.execute('RESET')
switch.reset_flow_table()
util.verbose_sleep(5)
return (tcam_rule_count, total_rule_count, flow_mod_rate)
def run(packet_per_second=100, pkt_size=1500, run_time=220):
"""
Returns (pktgen_pps, pkt_in_pps, flow_mod_pps, flow_mod_pps_stdev, pkt_out_pps), where
pps_in is the actual number of packets/sec of pktgen, and flow_mod_pps and
flow_mod_pps_stdev are the mean and stdev pps of successful flow
installations at steady state.
"""
util.ping_test()
switch = Switch(config.active_config)
switch.reset_flow_table()
# Initialize the experimental controller so that POX would have the
# necessary settings.
control_client = ExpControlClient('mumu.ucsd.edu')
control_client.execute(['RESET'])
control_client.execute(['SET', 'flow_stat_interval', 20])
control_client.execute(['SET', 'install_bogus_rules', True])
control_client.execute(['SET', 'emulate_hp_switch', True])
# Start capturing packets.
tcpdump = Tcpdump(config.active_config)
tcpdump.start()
tcpdump_start_time = time.time()
# Start firing packets.
pktgen = Pktgen(config.active_config)
gap = 1.0 / packet_per_second
pkt_count = int(run_time * packet_per_second)
pktgen.low_level_start(pkt_count=pkt_count, pkt_size=pkt_size,
gap_ns=gap*1000*1000*1000, flow_count=1)
pktgen_start_time = time.time()
flow_mod_pps_list = []
# How fast were rules successfully written into the hardware table? We take
# statistics at steady state. Also display flow statistics once in a while.
last_stat_time = [0]
def callback(t_left):
flow_stat_dict = control_client.execute(['GET', 'flow_count_dict'])
for stat_time in sorted(flow_stat_dict.keys()):
if stat_time > last_stat_time[0]:
last_stat_time[0] = stat_time
flow_count = flow_stat_dict[stat_time]
print t_left, 'seconds left, with flows', flow_count
if pktgen_start_time + 60 <= time.time() <= pktgen_start_time + 180:
flow_mod_pps_list.append(flow_count / 10.0)
# Check the stat every 20 seconds.
util.callback_sleep(run_time, callback, interval=20)
# How fast were packets actually generated?
pktgen_result = pktgen.stop_and_get_result()
pktgen_pps = pktgen_result.sent_pkt_count / pktgen_result.running_time
# How fast were pkt_out events?
tcpdump_end_time = time.time()
tcpdump_result = tcpdump.stop_and_get_result()
pkt_out_pps = (tcpdump_result.dropped_pkt_count + tcpdump_result.recvd_pkt_count) / \
(tcpdump_end_time - tcpdump_start_time)
# Calculate the mean and stdev of successful flow_mod pps.
(flow_mod_pps, flow_mod_pps_stdev) = util.get_mean_and_stdev(flow_mod_pps_list)
# How fast were pkt_in events arriving?
pkt_in_count = control_client.execute(['GET', 'pkt_in_count'])
pkt_in_start_time = control_client.execute(['GET', 'pkt_in_start_time'])
pkt_in_end_time = control_client.execute(['GET', 'pkt_in_end_time'])
pkt_in_pps = pkt_in_count / (pkt_in_end_time - pkt_in_start_time)
return (pktgen_pps, pkt_in_pps, flow_mod_pps, flow_mod_pps_stdev, pkt_out_pps)
