def run_ecn_test(api, testbed_config, conn_data, fanout_data, duthost,
dut_port, kmin, kmax, pmax, pkt_size, pkt_cnt, lossless_prio,
prio_dscp_map, iters):
"""
Run a ECN test
Args:
api (obj): IXIA session
testbed_config (obj): L2/L3 config of a T0 testbed
conn_data (dict): the dictionary returned by conn_graph_fact.
fanout_data (dict): the dictionary returned by fanout_graph_fact.
duthost (Ansible host instance): device under test
dut_port (str): DUT port to test
kmin (int): RED/ECN minimum threshold in bytes
kmax (int): RED/ECN maximum threshold in bytes
pmax (int): RED/ECN maximum marking probability in percentage
pkt_size (int): data packet size in bytes
pkt_cnt (int): data packet count
lossless_prio (int): lossless priority
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
iters (int): # of iterations in the test
Returns:
Return captured IP packets (list of list)
"""
pytest_assert(testbed_config is not None,
'Failed to get L2/3 testbed config')
stop_pfcwd(duthost)
disable_packet_aging(duthost)
""" Configure WRED/ECN thresholds """
config_result = config_wred(host_ans=duthost,
kmin=kmin,
kmax=kmax,
pmax=pmax)
pytest_assert(config_result is True,
'Failed to configure WRED/ECN at the DUT')
""" Enable ECN marking """
enable_ecn(host_ans=duthost, prio=lossless_prio)
""" Configure PFC threshold to 2 ^ 3 """
config_result = config_ingress_lossless_buffer_alpha(host_ans=duthost,
alpha_log2=3)
pytest_assert(config_result is True,
'Failed to configure PFC threshold to 8')
""" Get the ID of the port to test """
port_id = get_dut_port_id(dut_hostname=duthost.hostname,
dut_port=dut_port,
conn_data=conn_data,
fanout_data=fanout_data)
pytest_assert(port_id is not None,
'Failed to get ID for port {}'.format(dut_port))
""" Generate packet capture config """
capture_config = __config_capture_ip_pkt(testbed_config=testbed_config,
port_id=port_id)
""" Generate traffic config """
flows = __gen_traffic(testbed_config=testbed_config,
port_id=port_id,
pause_flow_name=PAUSE_FLOW_NAME,
data_flow_name=DATA_FLOW_NAME,
prio=lossless_prio,
data_pkt_size=pkt_size,
data_pkt_cnt=pkt_cnt,
data_flow_delay_sec=DATA_START_DELAY_SEC,
exp_dur_sec=EXP_DURATION_SEC,
prio_dscp_map=prio_dscp_map)
""" Tgen config = testbed config + flow config + capture config"""
config = testbed_config
config.flows = flows
config.captures = capture_config
""" Run traffic and capture packets """
capture_port_name = capture_config[0].port_names[0]
result = []
for i in range(iters):
pcap_file_name = '{}-{}.pcap'.format(capture_port_name, i)
__run_traffic(api=api,
config=config,
all_flow_names=[PAUSE_FLOW_NAME, DATA_FLOW_NAME],
exp_dur_sec=EXP_DURATION_SEC,
capture_port_name=capture_port_name,
pcap_file_name=pcap_file_name)
result.append(__get_ip_pkts(pcap_file_name))
return result
def run_pfc_test(api,
testbed_config,
port_config_list,
conn_data,
fanout_data,
duthost,
dut_port,
global_pause,
pause_prio_list,
test_prio_list,
bg_prio_list,
prio_dscp_map,
test_traffic_pause):
"""
Run a PFC test
Args:
api (obj): IXIA session
testbed_config (obj): testbed L1/L2/L3 configuration
port_config_list (list): list of port configuration
conn_data (dict): the dictionary returned by conn_graph_fact.
fanout_data (dict): the dictionary returned by fanout_graph_fact.
duthost (Ansible host instance): device under test
dut_port (str): DUT port to test
global_pause (bool): if pause frame is IEEE 802.3X pause
pause_prio_list (list): priorities to pause for pause frames
test_prio_list (list): priorities of test flows
bg_prio_list (list): priorities of background flows
prio_dscp_map (dict): Priority vs. DSCP map (key = priority).
test_traffic_pause (bool): if test flows are expected to be paused
Returns:
N/A
"""
pytest_assert(testbed_config is not None, 'Fail to get L2/3 testbed config')
stop_pfcwd(duthost)
disable_packet_aging(duthost)
""" Get the ID of the port to test """
port_id = get_dut_port_id(dut_hostname=duthost.hostname,
dut_port=dut_port,
conn_data=conn_data,
fanout_data=fanout_data)
pytest_assert(port_id is not None,
'Fail to get ID for port {}'.format(dut_port))
""" Rate percent must be an integer """
test_flow_rate_percent = int(TEST_FLOW_AGGR_RATE_PERCENT / len(test_prio_list))
bg_flow_rate_percent = int(BG_FLOW_AGGR_RATE_PERCENT / len(bg_prio_list))
""" Generate traffic config """
flows = __gen_traffic(testbed_config=testbed_config,
port_config_list=port_config_list,
port_id=port_id,
duthost=duthost,
pause_flow_name=PAUSE_FLOW_NAME,
global_pause=global_pause,
pause_prio_list=pause_prio_list,
test_flow_name=TEST_FLOW_NAME,
test_flow_prio_list=test_prio_list,
test_flow_rate_percent=test_flow_rate_percent,
bg_flow_name=BG_FLOW_NAME,
bg_flow_prio_list=bg_prio_list,
bg_flow_rate_percent=bg_flow_rate_percent,
data_flow_dur_sec=DATA_FLOW_DURATION_SEC,
data_flow_delay_sec=DATA_FLOW_DELAY_SEC,
data_pkt_size=DATA_PKT_SIZE,
prio_dscp_map=prio_dscp_map)
""" Tgen config = testbed config + flow config """
config = testbed_config
config.flows = flows
"""
import json
config_json = json.dumps(config, indent=2, default=lambda x: x.__dict__)
print(config_json)
"""
all_flow_names = [flow.name for flow in flows]
data_flow_names = [flow.name for flow in flows if PAUSE_FLOW_NAME not in flow.name]
""" Run traffic """
flow_stats = __run_traffic(api=api,
config=config,
data_flow_names=data_flow_names,
all_flow_names=all_flow_names,
exp_dur_sec=DATA_FLOW_DURATION_SEC+DATA_FLOW_DELAY_SEC)
speed_str = config.layer1[0].speed
speed_gbps = int(speed_str.split('_')[1])
""" Verify experiment results """
__verify_results(rows=flow_stats,
duthost=duthost,
pause_flow_name=PAUSE_FLOW_NAME,
test_flow_name=TEST_FLOW_NAME,
bg_flow_name=BG_FLOW_NAME,
data_flow_dur_sec=DATA_FLOW_DURATION_SEC,
test_flow_rate_percent=test_flow_rate_percent,
bg_flow_rate_percent=bg_flow_rate_percent,
data_pkt_size=DATA_PKT_SIZE,
speed_gbps=speed_gbps,
test_flow_pause=test_traffic_pause,
tolerance=TOLERANCE_THRESHOLD)