def __gen_traffic(testbed_config, port_config_list, port_id, pause_flow_name,
pause_flow_dur_sec, data_flow_name_list,
data_flow_delay_sec_list, data_flow_dur_sec_list,
data_pkt_size, prio_list, prio_dscp_map):
"""
Generate configurations of flows, including data flows and pause storm.
Args:
testbed_config (obj): testbed L1/L2/L3 configuration
port_config_list (list): list of port configuration
port_id (int): ID of DUT port to test.
pause_flow_name (str): name of pause storm
pause_flow_dur_sec (float): duration of pause storm in second
data_flow_name_list (list): list of data flow names
data_flow_delay_sec_list (list): list of data flow start delays in second
data_flow_dur_sec_list (list): list of data flow durations in second
data_pkt_size (int): size of data packets in byte
prio_list (list): priorities of data flows and pause storm
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
flows configurations (list): the list should have configurations of
len(prio_list) * 2 data flows, and a pause storm.
"""
result = list()
rx_port_id = port_id
tx_port_id_list, rx_port_id_list = select_ports(
port_config_list=port_config_list,
pattern="many to one",
rx_port_id=rx_port_id)
pytest_assert(len(tx_port_id_list) > 0, "Cannot find any TX ports")
tx_port_id = select_tx_port(tx_port_id_list=tx_port_id_list,
rx_port_id=rx_port_id)
pytest_assert(tx_port_id is not None, "Cannot find a suitable TX port")
tx_port_config = next((x for x in port_config_list if x.id == tx_port_id),
None)
rx_port_config = next((x for x in port_config_list if x.id == rx_port_id),
None)
tx_mac = tx_port_config.mac
if tx_port_config.gateway == rx_port_config.gateway and \
tx_port_config.prefix_len == rx_port_config.prefix_len:
""" If soruce and destination port are in the same subnet """
rx_mac = rx_port_config.mac
else:
rx_mac = tx_port_config.gateway_mac
""" PFC storm """
pause_time = []
for x in range(8):
if x in prio_list:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector(prio_list)
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
pause_endpoint = PortTxRx(
tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_pkt_cnt = pps * pause_flow_dur_sec
pause_flow = Flow(name=pause_flow_name,
tx_rx=TxRx(pause_endpoint),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(
FixedPackets(packets=pause_pkt_cnt, delay=0)))
result.append(pause_flow)
data_endpoint = PortTxRx(
tx_port_name=testbed_config.ports[tx_port_id].name,
rx_port_name=testbed_config.ports[rx_port_id].name)
data_flow_rate_percent = int(100 / len(prio_list))
""" For each data flow """
for i in range(len(data_flow_name_list)):
""" For each priority """
for prio in prio_list:
eth_hdr = EthernetHeader(src=FieldPattern(tx_mac),
dst=FieldPattern(rx_mac),
pfc_queue=FieldPattern([prio]))
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
ipv4_hdr = Ipv4Header(src=FieldPattern(tx_port_config.ip),
dst=FieldPattern(rx_port_config.ip),
priority=ip_prio)
data_flow = Flow(
name='{} Prio {}'.format(data_flow_name_list[i], prio),
tx_rx=TxRx(data_endpoint),
packet=[Header(choice=eth_hdr),
Header(choice=ipv4_hdr)],
size=Size(data_pkt_size),
rate=Rate('line', data_flow_rate_percent),
duration=Duration(
FixedSeconds(seconds=data_flow_dur_sec_list[i],
delay=sec_to_nanosec(
data_flow_delay_sec_list[i]),
delay_unit='nanoseconds')))
result.append(data_flow)
return result
def __gen_traffic(testbed_config, port_id, pause_flow_name, data_flow_name,
prio, data_pkt_size, data_pkt_cnt, data_flow_delay_sec,
exp_dur_sec, prio_dscp_map):
"""
Generate configurations of flows, including a data flow and a PFC pause storm.
Args:
testbed_config (obj): L2/L3 config of a T0 testbed
port_id (int): ID of DUT port to test
pause_flow_name (str): name of the pause storm
data_flow_name (str): name of the data flow
prio (int): priority of the data flow and PFC pause storm
data_pkt_size (int): packet size of the data flow in byte
data_pkt_cnt (int): # of packets of the data flow
data_flow_delay_sec (float): start delay of the data flow in second
exp_dur_sec (float): experiment duration in second
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
Configurations of the data flow and the PFC pause storm (list)
"""
result = list()
rx_port_id = port_id
tx_port_id = (port_id + 1) % len(testbed_config.devices)
data_endpoint = DeviceTxRx(
tx_device_names=[testbed_config.devices[tx_port_id].name],
rx_device_names=[testbed_config.devices[rx_port_id].name],
)
data_flow_delay_nanosec = sec_to_nanosec(data_flow_delay_sec)
""" Data Flow """
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
pfc_queue = FieldPattern([prio])
data_flow = Flow(name=data_flow_name,
tx_rx=TxRx(data_endpoint),
packet=[
Header(choice=EthernetHeader(pfc_queue=pfc_queue)),
Header(choice=Ipv4Header(priority=ip_prio))
],
size=Size(data_pkt_size),
rate=Rate('line', 100),
duration=Duration(
FixedPackets(packets=data_pkt_cnt,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds')))
result.append(data_flow)
""" PFC Pause Storm """
pause_time = []
for x in range(8):
if x == prio:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector([prio])
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
""" Pause frames are sent from the RX port """
pause_src_point = PortTxRx(
tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_flow = Flow(name=pause_flow_name,
tx_rx=TxRx(pause_src_point),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(
FixedSeconds(seconds=exp_dur_sec,
delay=0,
delay_unit='nanoseconds')))
result.append(pause_flow)
return result
def __gen_traffic(testbed_config,
port_config_list,
port_id,
duthost,
pause_flow_name,
global_pause,
pause_prio_list,
test_flow_name,
test_flow_prio_list,
test_flow_rate_percent,
bg_flow_name,
bg_flow_prio_list,
bg_flow_rate_percent,
data_flow_dur_sec,
data_flow_delay_sec,
data_pkt_size,
prio_dscp_map):
"""
Generate configurations of flows, including test flows, background flows and
pause storm. Test flows and background flows are also known as data flows.
Args:
testbed_config (obj): testbed L1/L2/L3 configuration
port_config_list (list): list of port configuration
port_id (int): ID of DUT port to test
duthost (Ansible host instance): device under test
pause_flow_name (str): name of pause storm
global_pause (bool): if pause frame is IEEE 802.3X pause
pause_prio_list (list): priorities to pause for pause frames
test_flow_name (str): name of test flows
test_prio_list (list): priorities of test flows
test_flow_rate_percent (int): rate percentage for each test flow
bg_flow_name (str): name of background flows
bg_prio_list (list): priorities of background flows
bg_flow_rate_percent (int): rate percentage for each background flow
data_flow_dur_sec (int): duration of data flows in second
data_flow_delay_sec (int): start delay of data flows in second
data_pkt_size (int): packet size of data flows in byte
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
flows configurations (list): the list should have configurations of
len(test_flow_prio_list) test flow, len(bg_flow_prio_list) background
flows and a pause storm.
"""
result = list()
rx_port_id = port_id
tx_port_id_list, rx_port_id_list = select_ports(port_config_list=port_config_list,
duthost=duthost,
pattern="many to one",
rx_port_id=rx_port_id)
pytest_assert(len(tx_port_id_list) > 0, "Cannot find any TX ports")
tx_port_id = select_tx_port(tx_port_id_list=tx_port_id_list,
rx_port_id=rx_port_id)
pytest_assert(tx_port_id is not None, "Cannot find a suitable TX port")
tx_port_config = next((x for x in port_config_list if x.id == tx_port_id), None)
rx_port_config = next((x for x in port_config_list if x.id == rx_port_id), None)
tx_mac = tx_port_config.mac
if tx_port_config.gateway == rx_port_config.gateway and \
tx_port_config.prefix_len == rx_port_config.prefix_len:
""" If soruce and destination port are in the same subnet """
rx_mac = rx_port_config.mac
else:
rx_mac = tx_port_config.gateway_mac
data_endpoint = PortTxRx(tx_port_name=testbed_config.ports[tx_port_id].name,
rx_port_name=testbed_config.ports[rx_port_id].name)
data_flow_delay_nanosec = sec_to_nanosec(data_flow_delay_sec)
""" Test flows """
for prio in test_flow_prio_list:
eth_hdr = EthernetHeader(src=FieldPattern(tx_mac),
dst=FieldPattern(rx_mac),
pfc_queue=FieldPattern([prio]))
ip_prio = Priority(Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
ipv4_hdr = Ipv4Header(src=FieldPattern(tx_port_config.ip),
dst=FieldPattern(rx_port_config.ip),
priority=ip_prio)
test_flow = Flow(
name='{} Prio {}'.format(test_flow_name, prio),
tx_rx=TxRx(data_endpoint),
packet=[Header(choice=eth_hdr), Header(choice=ipv4_hdr)],
size=Size(data_pkt_size),
rate=Rate('line', test_flow_rate_percent),
duration=Duration(FixedSeconds(seconds=data_flow_dur_sec,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds'))
)
result.append(test_flow)
""" Background flows """
for prio in bg_flow_prio_list:
eth_hdr = EthernetHeader(src=FieldPattern(tx_mac),
dst=FieldPattern(rx_mac),
pfc_queue=FieldPattern([prio]))
ip_prio = Priority(Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
ipv4_hdr = Ipv4Header(src=FieldPattern(tx_port_config.ip),
dst=FieldPattern(rx_port_config.ip),
priority=ip_prio)
bg_flow = Flow(
name='{} Prio {}'.format(bg_flow_name, prio),
tx_rx=TxRx(data_endpoint),
packet=[Header(choice=eth_hdr), Header(choice=ipv4_hdr)],
size=Size(data_pkt_size),
rate=Rate('line', bg_flow_rate_percent),
duration=Duration(FixedSeconds(seconds=data_flow_dur_sec,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds'))
)
result.append(bg_flow)
""" Pause storm """
if global_pause:
pause_pkt = Header(EthernetPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce')
))
else:
pause_time = []
for x in range(8):
if x in pause_prio_list:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector(pause_prio_list)
pause_pkt = Header(PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
""" Pause frames are sent from the RX port """
pause_endpoint = PortTxRx(tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_flow = Flow(
name=pause_flow_name,
tx_rx=TxRx(pause_endpoint),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(Continuous(delay=0, delay_unit='nanoseconds'))
)
result.append(pause_flow)
return result
def __gen_pause_flow(testbed_config, src_port_id, flow_name, pause_prio_list,
flow_dur_sec):
"""
Generate the configuration for a PFC pause storm
Args:
testbed_config (obj): L2/L3 config of a T0 testbed
src_port_id (int): ID of the source port
flow_name (str): flow' name
pause_prio_list (list): priorities to pause for PFC frames
flow_dur_sec (float): duration of the flow in second
Returns:
flow configuration (obj): including name, packet format, rate, ...
"""
pause_time = []
for x in range(8):
if x in pause_prio_list:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector(pause_prio_list)
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
dst_port_id = (src_port_id + 1) % len(testbed_config.devices)
pause_src_point = PortTxRx(
tx_port_name=testbed_config.ports[src_port_id].name,
rx_port_name=testbed_config.ports[dst_port_id].name)
"""
The minimal fixed time duration in IXIA is 1 second.
To support smaller durations, we need to use # of packets
"""
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pkt_cnt = pps * flow_dur_sec
pause_flow = Flow(name=flow_name,
tx_rx=TxRx(pause_src_point),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(FixedPackets(packets=pkt_cnt,
delay=0)))
return pause_flow
def __gen_traffic(testbed_config, port_id, pause_flow_name, pause_flow_dur_sec,
data_flow_name_list, data_flow_delay_sec_list,
data_flow_dur_sec_list, data_pkt_size, prio_list,
prio_dscp_map):
"""
Generate configurations of flows, including data flows and pause storm.
Args:
testbed_config (obj): L2/L3 config of a T0 testbed
port_id (int): ID of DUT port to test.
pause_flow_name (str): name of pause storm
pause_flow_dur_sec (float): duration of pause storm in second
data_flow_name_list (list): list of data flow names
data_flow_delay_sec_list (list): list of data flow start delays in second
data_flow_dur_sec_list (list): list of data flow durations in second
data_pkt_size (int): size of data packets in byte
prio_list (list): priorities of data flows and pause storm
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
flows configurations (list): the list should have configurations of
len(prio_list) * 2 data flows, and a pause storm.
"""
result = list()
rx_port_id = port_id
tx_port_id = (port_id + 1) % len(testbed_config.devices)
data_endpoint = DeviceTxRx(
tx_device_names=[testbed_config.devices[tx_port_id].name],
rx_device_names=[testbed_config.devices[rx_port_id].name],
)
""" PFC storm """
pause_time = []
for x in range(8):
if x in prio_list:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector(prio_list)
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
pause_src_point = PortTxRx(
tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_pkt_cnt = pps * pause_flow_dur_sec
pause_flow = Flow(name=pause_flow_name,
tx_rx=TxRx(pause_src_point),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(
FixedPackets(packets=pause_pkt_cnt, delay=0)))
result.append(pause_flow)
data_flow_rate_percent = int(100 / len(prio_list))
""" For each data flow """
for i in range(len(data_flow_name_list)):
""" For each priority """
for prio in prio_list:
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
pfc_queue = FieldPattern([prio])
data_flow = Flow(
name='{} Prio {}'.format(data_flow_name_list[i], prio),
tx_rx=TxRx(data_endpoint),
packet=[
Header(choice=EthernetHeader(pfc_queue=pfc_queue)),
Header(choice=Ipv4Header(priority=ip_prio))
],
size=Size(data_pkt_size),
rate=Rate('line', data_flow_rate_percent),
duration=Duration(
FixedSeconds(seconds=data_flow_dur_sec_list[i],
delay=sec_to_nanosec(
data_flow_delay_sec_list[i]),
delay_unit='nanoseconds')))
result.append(data_flow)
return result
def __gen_traffic(testbed_config, port_config_list, port_id, pause_flow_name,
data_flow_name, prio, data_pkt_size, data_pkt_cnt,
data_flow_delay_sec, exp_dur_sec, prio_dscp_map):
"""
Generate configurations of flows, including a data flow and a PFC pause storm.
Args:
testbed_config (obj): testbed L1/L2/L3 configuration
port_config_list (list): list of port configuration
port_id (int): ID of DUT port to test
pause_flow_name (str): name of the pause storm
data_flow_name (str): name of the data flow
prio (int): priority of the data flow and PFC pause storm
data_pkt_size (int): packet size of the data flow in byte
data_pkt_cnt (int): # of packets of the data flow
data_flow_delay_sec (float): start delay of the data flow in second
exp_dur_sec (float): experiment duration in second
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
Configurations of the data flow and the PFC pause storm (list)
"""
result = list()
rx_port_id = port_id
tx_port_id_list, rx_port_id_list = select_ports(
port_config_list=port_config_list,
pattern="many to one",
rx_port_id=rx_port_id)
pytest_assert(len(tx_port_id_list) > 0, "Cannot find any TX ports")
tx_port_id = select_tx_port(tx_port_id_list=tx_port_id_list,
rx_port_id=rx_port_id)
pytest_assert(tx_port_id is not None, "Cannot find a suitable TX port")
tx_port_config = next((x for x in port_config_list if x.id == tx_port_id),
None)
rx_port_config = next((x for x in port_config_list if x.id == rx_port_id),
None)
tx_mac = tx_port_config.mac
if tx_port_config.gateway == rx_port_config.gateway and \
tx_port_config.prefix_len == rx_port_config.prefix_len:
""" If soruce and destination port are in the same subnet """
rx_mac = rx_port_config.mac
else:
rx_mac = tx_port_config.gateway_mac
data_endpoint = PortTxRx(
tx_port_name=testbed_config.ports[tx_port_id].name,
rx_port_name=testbed_config.ports[rx_port_id].name)
data_flow_delay_nanosec = sec_to_nanosec(data_flow_delay_sec)
eth_hdr = EthernetHeader(src=FieldPattern(tx_mac),
dst=FieldPattern(rx_mac),
pfc_queue=FieldPattern([prio]))
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
ipv4_hdr = Ipv4Header(src=FieldPattern(tx_port_config.ip),
dst=FieldPattern(rx_port_config.ip),
priority=ip_prio)
data_flow = Flow(name=data_flow_name,
tx_rx=TxRx(data_endpoint),
packet=[Header(choice=eth_hdr),
Header(choice=ipv4_hdr)],
size=Size(data_pkt_size),
rate=Rate('line', 100),
duration=Duration(
FixedPackets(packets=data_pkt_cnt,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds')))
result.append(data_flow)
""" PFC Pause Storm """
pause_time = []
for x in range(8):
if x == prio:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector([prio])
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
""" Pause frames are sent from the RX port """
pause_endpoint = PortTxRx(
tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_flow = Flow(name=pause_flow_name,
tx_rx=TxRx(pause_endpoint),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(
FixedSeconds(seconds=exp_dur_sec,
delay=0,
delay_unit='nanoseconds')))
result.append(pause_flow)
return result
def __gen_traffic(testbed_config, port_id, pause_flow_name, global_pause,
pause_prio_list, test_flow_name, test_flow_prio_list,
test_flow_rate_percent, bg_flow_name, bg_flow_prio_list,
bg_flow_rate_percent, data_flow_dur_sec, data_flow_delay_sec,
data_pkt_size, prio_dscp_map):
"""
Generate configurations of flows, including test flows, background flows and
pause storm. Test flows and background flows are also known as data flows.
Args:
testbed_config (obj): L2/L3 config of a T0 testbed
port_id (int): ID of DUT port to test.
pause_flow_name (str): name of pause storm
global_pause (bool): if pause frame is IEEE 802.3X pause
pause_prio_list (list): priorities to pause for pause frames
test_flow_name (str): name of test flows
test_prio_list (list): priorities of test flows
test_flow_rate_percent (int): rate percentage for each test flow
bg_flow_name (str): name of background flows
bg_prio_list (list): priorities of background flows
bg_flow_rate_percent (int): rate percentage for each background flow
data_flow_dur_sec (int): duration of data flows in second
data_flow_delay_sec (int): start delay of data flows in second
data_pkt_size (int): packet size of data flows in byte
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
Returns:
flows configurations (list): the list should have configurations of
len(test_flow_prio_list) test flow, len(bg_flow_prio_list) background
flows and a pause storm.
"""
result = list()
rx_port_id = port_id
tx_port_id = (port_id + 1) % len(testbed_config.devices)
data_endpoint = DeviceTxRx(
tx_device_names=[testbed_config.devices[tx_port_id].name],
rx_device_names=[testbed_config.devices[rx_port_id].name],
)
data_flow_delay_nanosec = sec_to_nanosec(data_flow_delay_sec)
""" Test flows """
for prio in test_flow_prio_list:
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
pfc_queue = FieldPattern([prio])
test_flow = Flow(
name='{} Prio {}'.format(test_flow_name, prio),
tx_rx=TxRx(data_endpoint),
packet=[
Header(choice=EthernetHeader(pfc_queue=pfc_queue)),
Header(choice=Ipv4Header(priority=ip_prio))
],
size=Size(data_pkt_size),
rate=Rate('line', test_flow_rate_percent),
duration=Duration(
FixedSeconds(seconds=data_flow_dur_sec,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds')))
result.append(test_flow)
""" Background flows """
for prio in bg_flow_prio_list:
ip_prio = Priority(
Dscp(phb=FieldPattern(choice=prio_dscp_map[prio]),
ecn=FieldPattern(choice=Dscp.ECN_CAPABLE_TRANSPORT_1)))
pfc_queue = FieldPattern([prio])
bg_flow = Flow(name='{} Prio {}'.format(bg_flow_name, prio),
tx_rx=TxRx(data_endpoint),
packet=[
Header(choice=EthernetHeader(pfc_queue=pfc_queue)),
Header(choice=Ipv4Header(priority=ip_prio))
],
size=Size(data_pkt_size),
rate=Rate('line', bg_flow_rate_percent),
duration=Duration(
FixedSeconds(seconds=data_flow_dur_sec,
delay=data_flow_delay_nanosec,
delay_unit='nanoseconds')))
result.append(bg_flow)
""" Pause storm """
if global_pause:
pause_pkt = Header(
EthernetPause(dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce')))
else:
pause_time = []
for x in range(8):
if x in pause_prio_list:
pause_time.append('ffff')
else:
pause_time.append('0000')
vector = pfc_class_enable_vector(pause_prio_list)
pause_pkt = Header(
PfcPause(
dst=FieldPattern(choice='01:80:C2:00:00:01'),
src=FieldPattern(choice='00:00:fa:ce:fa:ce'),
class_enable_vector=FieldPattern(choice=vector),
pause_class_0=FieldPattern(choice=pause_time[0]),
pause_class_1=FieldPattern(choice=pause_time[1]),
pause_class_2=FieldPattern(choice=pause_time[2]),
pause_class_3=FieldPattern(choice=pause_time[3]),
pause_class_4=FieldPattern(choice=pause_time[4]),
pause_class_5=FieldPattern(choice=pause_time[5]),
pause_class_6=FieldPattern(choice=pause_time[6]),
pause_class_7=FieldPattern(choice=pause_time[7]),
))
""" Pause frames are sent from the RX port """
pause_src_point = PortTxRx(
tx_port_name=testbed_config.ports[rx_port_id].name,
rx_port_name=testbed_config.ports[tx_port_id].name)
speed_str = testbed_config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
pause_dur = 65535 * 64 * 8.0 / (speed_gbps * 1e9)
pps = int(2 / pause_dur)
pause_flow = Flow(name=pause_flow_name,
tx_rx=TxRx(pause_src_point),
packet=[pause_pkt],
size=Size(64),
rate=Rate('pps', value=pps),
duration=Duration(
Continuous(delay=0, delay_unit='nanoseconds')))
result.append(pause_flow)
return result