def test_red_accuracy(request, snappi_api, snappi_testbed_config,
conn_graph_facts, fanout_graph_facts, duthosts,
rand_one_dut_hostname, rand_one_dut_portname_oper_up,
rand_one_dut_lossless_prio, prio_dscp_map):
"""
Measure RED/ECN marking accuracy of the device under test (DUT).
Dump queue length vs. ECN marking probability results into a file.
Args:
request (pytest fixture): pytest request object
snappi_api (pytest fixture): SNAPPI session
snappi_testbed_config (pytest fixture): testbed configuration information
conn_graph_facts (pytest fixture): connection graph
fanout_graph_facts (pytest fixture): fanout graph
duthosts (pytest fixture): list of DUTs
rand_one_dut_hostname (str): hostname of DUT
rand_one_dut_portname_oper_up (str): name of port to test, e.g., 's6100-1|Ethernet0'
rand_one_dut_lossless_prio (str): name of lossless priority to test, e.g., 's6100-1|3'
prio_dscp_map (pytest fixture): priority vs. DSCP map (key = priority).
Returns:
N/A
"""
disable_test = request.config.getoption("--disable_ecn_snappi_test")
if disable_test:
pytest.skip("test_red_accuracy is disabled")
dut_hostname, dut_port = rand_one_dut_portname_oper_up.split('|')
dut_hostname2, lossless_prio = rand_one_dut_lossless_prio.split('|')
pytest_require(rand_one_dut_hostname == dut_hostname == dut_hostname2,
"Priority and port are not mapped to the expected DUT")
testbed_config, port_config_list = snappi_testbed_config
duthost = duthosts[rand_one_dut_hostname]
lossless_prio = int(lossless_prio)
kmin = 500000
kmax = 2000000
pmax = 5
pkt_size = 1024
pkt_cnt = 2100
iters = 100
result_file_name = 'result.txt'
ip_pkts_list = run_ecn_test(api=snappi_api,
testbed_config=testbed_config,
port_config_list=port_config_list,
conn_data=conn_graph_facts,
fanout_data=fanout_graph_facts,
duthost=duthost,
dut_port=dut_port,
kmin=kmin,
kmax=kmax,
pmax=pmax,
pkt_size=pkt_size,
pkt_cnt=pkt_cnt,
lossless_prio=lossless_prio,
prio_dscp_map=prio_dscp_map,
iters=iters)
""" Check if we capture packets of all the rounds """
pytest_assert(
len(ip_pkts_list) == iters,
'Only capture {}/{} rounds of packets'.format(len(ip_pkts_list),
iters))
queue_mark_cnt = {}
for i in range(pkt_cnt):
queue_len = (pkt_cnt - i) * pkt_size
queue_mark_cnt[queue_len] = 0
for i in range(iters):
ip_pkts = ip_pkts_list[i]
""" Check if we capture all the packets in each round """
pytest_assert(
len(ip_pkts) == pkt_cnt,
'Only capture {}/{} packets in round {}'.format(
len(ip_pkts), pkt_cnt, i))
for j in range(pkt_cnt):
ip_pkt = ip_pkts[j]
queue_len = (pkt_cnt - j) * pkt_size
if is_ecn_marked(ip_pkt):
queue_mark_cnt[queue_len] += 1
""" Dump queue length vs. ECN marking probability into a file """
queue_mark_cnt = collections.OrderedDict(sorted(queue_mark_cnt.items()))
f = open(result_file_name, 'w')
for queue, mark_cnt in queue_mark_cnt.iteritems():
f.write('{} {}\n'.format(queue, float(mark_cnt) / iters))
f.close()
def test_dequeue_ecn(request, ixia_api, ixia_testbed_config, conn_graph_facts,
fanout_graph_facts, duthosts, rand_one_dut_hostname,
rand_one_dut_portname_oper_up, rand_one_dut_lossless_prio,
prio_dscp_map):
"""
Test if the device under test (DUT) performs ECN marking at the egress
Args:
request (pytest fixture): pytest request object
ixia_api (pytest fixture): IXIA session
ixia_testbed_config (pytest fixture): testbed configuration information
conn_graph_facts (pytest fixture): connection graph
fanout_graph_facts (pytest fixture): fanout graph
duthosts (pytest fixture): list of DUTs
rand_one_dut_hostname (str): hostname of DUT
rand_one_dut_portname_oper_up (str): name of port to test, e.g., 's6100-1|Ethernet0'
rand_one_dut_lossless_prio (str): name of lossless priority to test, e.g., 's6100-1|3'
prio_dscp_map (pytest fixture): priority vs. DSCP map (key = priority).
Returns:
N/A
"""
disable_test = request.config.getoption("--disable_ecn_test")
if disable_test:
pytest.skip("test_dequeue_ecn is disabled")
dut_hostname, dut_port = rand_one_dut_portname_oper_up.split('|')
dut_hostname2, lossless_prio = rand_one_dut_lossless_prio.split('|')
pytest_require(rand_one_dut_hostname == dut_hostname == dut_hostname2,
"Priority and port are not mapped to the expected DUT")
testbed_config, port_config_list = ixia_testbed_config
duthost = duthosts[rand_one_dut_hostname]
lossless_prio = int(lossless_prio)
kmin = 50000
kmax = 51000
pmax = 100
pkt_size = 1024
pkt_cnt = 100
ip_pkts = run_ecn_test(api=ixia_api,
testbed_config=testbed_config,
port_config_list=port_config_list,
conn_data=conn_graph_facts,
fanout_data=fanout_graph_facts,
duthost=duthost,
dut_port=dut_port,
kmin=kmin,
kmax=kmax,
pmax=pmax,
pkt_size=pkt_size,
pkt_cnt=pkt_cnt,
lossless_prio=lossless_prio,
prio_dscp_map=prio_dscp_map,
iters=1)[0]
""" Check if we capture all the packets """
pytest_assert(
len(ip_pkts) == pkt_cnt,
'Only capture {}/{} IP packets'.format(len(ip_pkts), pkt_cnt))
""" Check if the first packet is marked """
pytest_assert(is_ecn_marked(ip_pkts[0]),
"The first packet should be marked")
""" Check if the last packet is not marked """
pytest_assert(not is_ecn_marked(ip_pkts[-1]),
"The last packet should not be marked")
