# under the License.
from traffic_base import AbstractTrafficGenerator
+import traffic_utils as utils
class DummyTG(AbstractTrafficGenerator):
Useful for unit testing without actually generating any traffic.
"""
- def __init__(self, runner):
- AbstractTrafficGenerator.__init__(self, runner)
+ def __init__(self, config):
+ AbstractTrafficGenerator.__init__(self, config)
self.port_handle = []
self.rates = []
+ self.l2_frame_size = 0
+ self.duration_sec = self.config.duration_sec
+ self.intf_speed = config.generator_config.intf_speed
def get_version(self):
return "0.1"
def init(self):
pass
+ def get_tx_pps_dropped_pps(self, tx_rate):
+ '''Get actual tx packets based on requested tx rate
+
+ :param tx_rate: requested TX rate with unit ('40%', '1Mbps', '1000pps')
+
+ :return: the actual TX pps and the dropped pps corresponding to the requested TX rate
+ '''
+ dr, tx = self.__get_dr_actual_tx(tx_rate)
+ actual_tx_bps = utils.load_to_bps(tx, self.intf_speed)
+ avg_packet_size = utils.get_average_packet_size(self.l2_frame_size)
+ tx_packets = utils.bps_to_pps(actual_tx_bps, avg_packet_size)
+
+ dropped = tx_packets * dr / 100
+ # print '===get_tx_pkts_dropped_pkts req tex=', tx_rate, 'dr=', dr,
+ # 'actual tx rate=', tx, 'actual tx pkts=', tx_packets, 'dropped=', dropped
+ return int(tx_packets), int(dropped)
+
+ def set_response_curve(self, lr_dr=0, ndr=100, max_actual_tx=100, max_11_tx=100):
+ '''Set traffic gen response characteristics
+
+ Specifies the drop rate curve and the actual TX curve
+ :param float lr_dr: The actual drop rate at TX line rate (in %, 0..100)
+ :param float ndr: The true NDR (0 packet drop) in % (0..100) of line rate"
+ :param float max_actual_tx: highest actual TX when requested TX is 100%
+ :param float max_11_tx: highest requested TX that results in same actual TX
+ '''
+ self.target_ndr = ndr
+ if ndr < 100:
+ self.dr_slope = float(lr_dr) / (100 - ndr)
+ else:
+ self.dr_slope = 0
+ self.max_11_tx = max_11_tx
+ self.max_actual_tx = max_actual_tx
+ if max_11_tx < 100:
+ self.tx_slope = float(max_actual_tx - max_11_tx) / (100 - max_11_tx)
+ else:
+ self.tx_slope = 0
+
+ def __get_dr_actual_tx(self, requested_tx_rate):
+ '''Get drop rate at given requested tx rate
+ :param float requested_tx_rate: requested tx rate in % (0..100)
+ :return: the drop rate and actual tx rate at that requested_tx_rate in % (0..100)
+ '''
+ if requested_tx_rate <= self.max_11_tx:
+ actual_tx = requested_tx_rate
+ else:
+ actual_tx = self.max_11_tx + (requested_tx_rate - self.max_11_tx) * self.tx_slope
+ if actual_tx <= self.target_ndr:
+ dr = 0.0
+ else:
+ dr = (actual_tx - self.target_ndr) * self.dr_slope
+ return dr, actual_tx
+
def connect(self):
ports = list(self.config.generator_config.ports)
self.port_handle = ports
pass
def create_traffic(self, l2frame_size, rates, bidirectional, latency=True):
- pass
+ self.rates = [utils.to_rate_str(rate) for rate in rates]
+ self.l2_frame_size = l2frame_size
def clear_streamblock(self):
pass
def get_stats(self):
+ '''Get stats from current run.
+
+ The binary search mainly looks at 2 results to make the decision:
+ actual tx packets
+ actual rx dropped packets
+ From the Requested TX rate - we get the Actual TX rate and the RX drop rate
+ From the Run duration and actual TX rate - we get the actual total tx packets
+ From the Actual tx packets and RX drop rate - we get the RX dropped packets
+ '''
result = {}
- for ph in self.port_handle:
+ total_tx_pps = 0
+
+ # use dummy values for all other result field as the goal is to
+ # test the ndr/pdr convergence code
+ for idx, ph in enumerate(self.port_handle):
+ requested_tx_rate = utils.get_load_from_rate(self.rates[idx])
+ tx_pps, dropped_pps = self.get_tx_pps_dropped_pps(requested_tx_rate)
+
+ # total packets sent per direction - used by binary search
+ total_pkts = tx_pps * self.duration_sec
+ dropped_pkts = dropped_pps * self.duration_sec
+ _, tx_pkt_rate = self.__get_dr_actual_tx(requested_tx_rate)
result[ph] = {
'tx': {
- 'total_pkts': 1000,
+ 'total_pkts': total_pkts,
'total_pkt_bytes': 100000,
- 'pkt_rate': 100,
+ 'pkt_rate': tx_pkt_rate,
'pkt_bit_rate': 1000000
},
'rx': {
- 'total_pkts': 1000,
+ # total packets received
+ 'total_pkts': total_pkts - dropped_pkts,
'total_pkt_bytes': 100000,
'pkt_rate': 100,
'pkt_bit_rate': 1000000,
- 'dropped_pkts': 0
+ 'dropped_pkts': dropped_pkts
}
}
result[ph]['rx']['max_delay_usec'] = 10.0
result[ph]['rx']['min_delay_usec'] = 1.0
result[ph]['rx']['avg_delay_usec'] = 2.0
+ total_tx_pps += tx_pps
+ # actual total tx rate in pps
+ result['total_tx_rate'] = total_tx_pps
return result
def clear_stats(self):
import os
import sys
+import pytest
+
from attrdict import AttrDict
from nfvbench.config import config_loads
from nfvbench.credentials import Credentials
from nfvbench.specs import ChainType
from nfvbench.specs import Encaps
import nfvbench.traffic_gen.traffic_utils as traffic_utils
-import pytest
__location__ = os.path.realpath(os.path.join(os.getcwd(),
os.path.dirname(__file__)))
assert result == expected_result
"""
-# =========================================================================
-# PVVP Chain tests
-# =========================================================================
-
-"""
-@pytest.fixture
-def pvvp_chain(monkeypatch, openstack_vxlan_spec):
- tor_vni1 = Interface('vni-4097', 'n9k', 50, 77)
- vsw_vni1 = Interface('vxlan_tunnel0', 'vpp', 77, 48)
- vsw_vif1 = Interface('VirtualEthernet0/0/2', 'vpp', 48, 77)
- vsw_vif3 = Interface('VirtualEthernet0/0/0', 'vpp', 77, 47)
- vsw_vif4 = Interface('VirtualEthernet0/0/1', 'vpp', 45, 77)
- vsw_vif2 = Interface('VirtualEthernet0/0/3', 'vpp', 77, 44)
- vsw_vni2 = Interface('vxlan_tunnel1', 'vpp', 43, 77)
- tor_vni2 = Interface('vni-4098', 'n9k', 77, 40)
-
- def mock_init(self, *args, **kwargs):
- self.vni_ports = [4099, 4100]
- self.v2vnet = V2VNetwork()
- self.specs = openstack_vxlan_spec
- self.clients = {
- 'vpp': AttrDict({
- 'get_v2v_network': lambda reverse=None: Network([vsw_vif3, vsw_vif4], reverse),
- 'set_interface_counters': lambda pvvp=None: None,
- 'set_v2v_counters': lambda: None,
- })
- }
- self.worker = AttrDict({
- 'run': lambda: None,
- })
-
- def mock_empty(self, *args, **kwargs):
- pass
-
- def mock_get_network(self, traffic_port, vni_id, reverse=False):
- if vni_id == 0:
- return Network([tor_vni1, vsw_vni1, vsw_vif1], reverse)
- else:
- return Network([tor_vni2, vsw_vni2, vsw_vif2], reverse)
-
- def mock_get_data(self):
- return {}
-
- monkeypatch.setattr(PVVPChain, '_get_network', mock_get_network)
- monkeypatch.setattr(PVVPChain, '_get_data', mock_get_data)
- monkeypatch.setattr(PVVPChain, '_setup', mock_empty)
- monkeypatch.setattr(VxLANWorker, '_clear_interfaces', mock_empty)
- monkeypatch.setattr(PVVPChain, '_generate_traffic', mock_empty)
- monkeypatch.setattr(PVVPChain, '__init__', mock_init)
-
- return PVVPChain(None, None, {'vm': None, 'vpp': None, 'tor': None, 'traffic': None}, None)
-
-
-def test_pvvp_chain_run(pvvp_chain):
- result = pvvp_chain.run()
-
- expected_result = {
- 'raw_data': {},
- 'stats': None,
- 'packet_analysis':
- {'direction-forward': [
- OrderedDict([
- ('interface', 'vni-4097'),
- ('device', 'n9k'),
- ('packet_count', 50)
- ]),
- OrderedDict([
- ('interface', 'vxlan_tunnel0'),
- ('device', 'vpp'),
- ('packet_count', 48),
- ('packet_drop_count', 2),
- ('packet_drop_percentage', 4.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/2'),
- ('device', 'vpp'),
- ('packet_count', 48),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/0'),
- ('device', 'vpp'),
- ('packet_count', 47),
- ('packet_drop_count', 1),
- ('packet_drop_percentage', 2.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/1'),
- ('device', 'vpp'),
- ('packet_count', 45),
- ('packet_drop_count', 2),
- ('packet_drop_percentage', 4.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/3'),
- ('device', 'vpp'),
- ('packet_count', 44),
- ('packet_drop_count', 1),
- ('packet_drop_percentage', 2.0)
- ]),
- OrderedDict([
- ('interface', 'vxlan_tunnel1'),
- ('device', 'vpp'),
- ('packet_count', 43),
- ('packet_drop_count', 1),
- ('packet_drop_percentage', 2.0)
- ]),
- OrderedDict([
- ('interface', 'vni-4098'),
- ('device', 'n9k'),
- ('packet_count', 40),
- ('packet_drop_count', 3),
- ('packet_drop_percentage', 6.0)
- ])
- ],
- 'direction-reverse': [
- OrderedDict([
- ('interface', 'vni-4098'),
- ('device', 'n9k'),
- ('packet_count', 77)
- ]),
- OrderedDict([
- ('interface', 'vxlan_tunnel1'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/3'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/1'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/0'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'VirtualEthernet0/0/2'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'vxlan_tunnel0'),
- ('device', 'vpp'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ]),
- OrderedDict([
- ('interface', 'vni-4097'),
- ('device', 'n9k'),
- ('packet_count', 77),
- ('packet_drop_count', 0),
- ('packet_drop_percentage', 0.0)
- ])
- ]}
- }
- assert result == expected_result
-"""
-
-
# =========================================================================
# Traffic client tests
# =========================================================================
except Exception:
return True
else:
- assert False
+ return False
assert should_raise_error('101')
assert should_raise_error('201%')
assert traffic_utils.pps_to_bps(31.6066319896, 1518) == pytest.approx(388888)
assert traffic_utils.pps_to_bps(3225895.85831, 340.3) == pytest.approx(9298322222)
+# pps at 10Gbps line rate for 64 byte frames
+LR_64B_PPS = 14880952
+LR_1518B_PPS = 812743
+
+def assert_equivalence(reference, value, allowance_pct=1):
+ '''Asserts if a value is equivalent to a reference value with given margin
+
+ :param float reference: reference value to compare to
+ :param float value: value to compare to reference
+ :param float allowance_pct: max allowed percentage of margin
+ 0 : requires exact match
+ 1 : must be equal within 1% of the reference value
+ ...
+ 100: always true
+ '''
+ if reference == 0:
+ assert value == 0
+ else:
+ assert abs(value - reference) * 100 / reference <= allowance_pct
+
+def test_load_from_rate():
+ assert traffic_utils.get_load_from_rate('100%') == 100
+ assert_equivalence(100, traffic_utils.get_load_from_rate(str(LR_64B_PPS) + 'pps'))
+ assert_equivalence(50, traffic_utils.get_load_from_rate(str(LR_64B_PPS / 2) + 'pps'))
+ assert_equivalence(100, traffic_utils.get_load_from_rate('10Gbps'))
+ assert_equivalence(50, traffic_utils.get_load_from_rate('5000Mbps'))
+ assert_equivalence(1, traffic_utils.get_load_from_rate('100Mbps'))
+ assert_equivalence(100, traffic_utils.get_load_from_rate(str(LR_1518B_PPS) + 'pps',
+ avg_frame_size=1518))
+ assert_equivalence(100, traffic_utils.get_load_from_rate(str(LR_1518B_PPS * 2) + 'pps',
+ avg_frame_size=1518,
+ line_rate='20Gbps'))
"""
@pytest.fixture
'rates': [{'rate_percent': '10'}, {'rate_pps': '1'}]
}
- self.config = AttrDict({
- 'generator_config': {
- 'intf_speed': 10000000000
- },
- 'ndr_run': True,
- 'pdr_run': True,
- 'single_run': False,
- 'attempts': 1,
- 'measurement': {
- 'NDR': 0.0,
- 'PDR': 0.1,
- 'load_epsilon': 0.1
- }
- })
-
- self.runner = AttrDict({
- 'time_elapsed': lambda: 30,
- 'stop': lambda: None,
- 'client': AttrDict({'get_stats': lambda: None})
- })
-
- self.current_load = None
- self.dummy_stats = {
- 50.0: 72.6433562831,
- 25.0: 45.6095059858,
- 12.5: 0.0,
- 18.75: 27.218642979,
- 15.625: 12.68585861,
- 14.0625: 2.47154392563,
- 13.28125: 0.000663797066801,
- 12.890625: 0.0,
- 13.0859375: 0.0,
- 13.18359375: 0.00359387347122,
- 13.671875: 0.307939922531,
- 13.4765625: 0.0207718516156,
- 13.57421875: 0.0661795060969
- }
-
def mock_modify_load(self, load):
self.run_config['rates'][0] = {'rate_percent': str(load)}
self.current_load = load
- def mock_run_traffic(self):
- yield {
- 'overall': {
- 'drop_rate_percent': self.dummy_stats[self.current_load],
- 'rx': {
- 'total_pkts': 1,
- 'avg_delay_usec': 0.0,
- 'max_delay_usec': 0.0,
- 'min_delay_usec': 0.0
- }
- }
- }
-
monkeypatch.setattr(TrafficClient, '__init__', mock_init)
monkeypatch.setattr(TrafficClient, 'modify_load', mock_modify_load)
- monkeypatch.setattr(TrafficClient, 'run_traffic', mock_run_traffic)
return TrafficClient()
-
-
-def test_ndr_pdr_search(traffic_client):
- expected_results = {
- 'pdr': {
- 'l2frame_size': '64',
- 'initial_rate_type': 'rate_percent',
- 'stats': {
- 'overall': {
- 'drop_rate_percent': 0.0661795060969,
- 'min_delay_usec': 0.0,
- 'avg_delay_usec': 0.0,
- 'max_delay_usec': 0.0
- }
- },
- 'load_percent_per_direction': 13.57421875,
- 'rate_percent': 13.57422547,
- 'rate_bps': 1357422547.0,
- 'rate_pps': 2019974.0282738095,
- 'duration_sec': 30
- },
- 'ndr': {
- 'l2frame_size': '64',
- 'initial_rate_type': 'rate_percent',
- 'stats': {
- 'overall': {
- 'drop_rate_percent': 0.0,
- 'min_delay_usec': 0.0,
- 'avg_delay_usec': 0.0,
- 'max_delay_usec': 0.0
- }
- },
- 'load_percent_per_direction': 13.0859375,
- 'rate_percent': 13.08594422,
- 'rate_bps': 1308594422.0,
- 'rate_pps': 1947313.1279761905,
- 'duration_sec': 30
- }
- }
-
- results = traffic_client.get_ndr_and_pdr()
- assert len(results) == 2
- for result in results.values():
- result.pop('timestamp_sec')
- result.pop('time_taken_sec')
- assert results == expected_results
"""
def setup_module(module):
nfvbench.log.setup(mute_stdout=True)
-
def test_no_credentials():
cred = Credentials('/completely/wrong/path/openrc', None, False)
if cred.rc_auth_url:
# pylint: disable=wrong-import-position,ungrouped-imports
from nfvbench.traffic_client import Device
from nfvbench.traffic_client import IpBlock
-
+from nfvbench.traffic_client import TrafficClient
+from nfvbench.traffic_client import TrafficGeneratorFactory
# pylint: enable=wrong-import-position,ungrouped-imports
raise Exception("test")
except Exception:
logger.exception("got exception")
+
+def assert_ndr_pdr(stats, ndr, ndr_dr, pdr, pdr_dr):
+ assert stats['ndr']['rate_percent'] == ndr
+ assert stats['ndr']['stats']['overall']['drop_percentage'] == ndr_dr
+ assert_equivalence(pdr, stats['pdr']['rate_percent'])
+ assert_equivalence(pdr_dr, stats['pdr']['stats']['overall']['drop_percentage'])
+
+def get_traffic_client():
+ config = AttrDict({
+ 'traffic_generator': {'host_name': 'nfvbench_tg',
+ 'default_profile': 'dummy',
+ 'generator_profile': [{'name': 'dummy',
+ 'tool': 'dummy',
+ 'ip': '127.0.0.1',
+ 'intf_speed': '10Gbps',
+ 'interfaces': [{'port': 0, 'pci': 0},
+ {'port': 1, 'pci': 0}]}],
+ 'ip_addrs_step': '0.0.0.1',
+ 'ip_addrs': ['10.0.0.0/8', '20.0.0.0/8'],
+ 'tg_gateway_ip_addrs': ['1.1.0.100', '2.2.0.100'],
+ 'tg_gateway_ip_addrs_step': '0.0.0.1',
+ 'gateway_ip_addrs': ['1.1.0.2', '2.2.0.2'],
+ 'gateway_ip_addrs_step': '0.0.0.1',
+ 'udp_src_port': None,
+ 'udp_dst_port': None},
+ 'generator_profile': 'dummy',
+ 'service_chain': 'PVP',
+ 'service_chain_count': 1,
+ 'flow_count': 10,
+ 'vlan_tagging': True,
+ 'no_arp': False,
+ 'duration_sec': 1,
+ 'interval_sec': 1,
+ 'single_run': False,
+ 'ndr_run': True,
+ 'pdr_run': True,
+ 'rate': 'ndr_pdr',
+ 'check_traffic_time_sec': 200,
+ 'generic_poll_sec': 2,
+ 'measurement': {'NDR': 0.001, 'PDR': 0.1, 'load_epsilon': 0.1},
+ })
+ generator_factory = TrafficGeneratorFactory(config)
+ config.generator_config = generator_factory.get_generator_config(config.generator_profile)
+ traffic_client = TrafficClient(config, skip_sleep=True)
+ traffic_client.start_traffic_generator()
+ traffic_client.set_traffic('64', True)
+ return traffic_client
+
+def test_ndr_at_lr():
+ traffic_client = get_traffic_client()
+ tg = traffic_client.gen
+
+ # this is a perfect sut with no loss at LR
+ tg.set_response_curve(lr_dr=0, ndr=100, max_actual_tx=100, max_11_tx=100)
+ # tx packets should be line rate for 64B and no drops...
+ assert tg.get_tx_pps_dropped_pps(100) == (LR_64B_PPS, 0)
+ # NDR and PDR should be at 100%
+ traffic_client.ensure_end_to_end()
+ results = traffic_client.get_ndr_and_pdr()
+
+ assert_ndr_pdr(results, 200.0, 0.0, 200.0, 0.0)
+
+def test_ndr_at_50():
+ traffic_client = get_traffic_client()
+ tg = traffic_client.gen
+ # this is a sut with an NDR of 50% and linear drop rate after NDR up to 20% drops at LR
+ # (meaning that if you send 100% TX, you will only receive 80% RX)
+ # the tg requested TX/actual TX ratio is 1up to 50%, after 50%
+ # is linear up 80% actuak TX when requesting 100%
+ tg.set_response_curve(lr_dr=20, ndr=50, max_actual_tx=80, max_11_tx=50)
+ # tx packets should be half line rate for 64B and no drops...
+ assert tg.get_tx_pps_dropped_pps(50) == (LR_64B_PPS / 2, 0)
+ # at 100% TX requested, actual TX is 80% where the drop rate is 3/5 of 20% of the actual TX
+ assert tg.get_tx_pps_dropped_pps(100) == (int(LR_64B_PPS * 0.8),
+ int(LR_64B_PPS * 0.8 * 0.6 * 0.2))
+ results = traffic_client.get_ndr_and_pdr()
+ assert_ndr_pdr(results, 100.0, 0.0, 100.781, 0.09374)
+
+def test_ndr_pdr_low_cpu():
+ traffic_client = get_traffic_client()
+ tg = traffic_client.gen
+ # This test is for the case where the TG is underpowered and cannot send fast enough for the NDR
+ # true NDR=40%, actual TX at 50% = 30%, actual measured DR is 0%
+ # The ndr/pdr should bail out with a warning and a best effort measured NDR of 30%
+ tg.set_response_curve(lr_dr=50, ndr=40, max_actual_tx=60, max_11_tx=0)
+ # tx packets should be 30% at requested half line rate for 64B and no drops...
+ assert tg.get_tx_pps_dropped_pps(50) == (int(LR_64B_PPS * 0.3), 0)
+ results = traffic_client.get_ndr_and_pdr()
+ assert results
+ # import pprint
+ # pp = pprint.PrettyPrinter(indent=4)
+ # pp.pprint(results)
Code Review / nfvbench.git / commitdiff