# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
-from ssh import SSH
+
+"""Performance testing traffic generator library."""
+
from robot.api import logger
+from robot.libraries.BuiltIn import BuiltIn
+
+from resources.libraries.python.constants import Constants
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.topology import NodeType
+from resources.libraries.python.topology import NodeSubTypeTG
+from resources.libraries.python.topology import Topology
+from resources.libraries.python.DropRateSearch import DropRateSearch
+
+__all__ = ['TrafficGenerator', 'TGDropRateSearchImpl']
+
+
+class TGDropRateSearchImpl(DropRateSearch):
+ """Drop Rate Search implementation."""
+
+ def __init__(self):
+ super(TGDropRateSearchImpl, self).__init__()
+
+ def measure_loss(self, rate, frame_size, loss_acceptance,
+ loss_acceptance_type, traffic_type):
+ """Runs the traffic and evaluate the measured results.
+
+ :param rate: Offered traffic load.
+ :param frame_size: Size of frame.
+ :param loss_acceptance: Permitted drop ratio or frames count.
+ :param loss_acceptance_type: Type of permitted loss.
+ :param traffic_type: Traffic profile ([2,3]-node-L[2,3], ...).
+ :type rate: int
+ :type frame_size: str
+ :type loss_acceptance: float
+ :type loss_acceptance_type: LossAcceptanceType
+ :type traffic_type: str
+ :returns: Drop threshold exceeded? (True/False)
+ :rtype: bool
+ :raises: NotImplementedError if TG is not supported.
+ :raises: RuntimeError if TG is not specified.
+ """
+ # we need instance of TrafficGenerator instantiated by Robot Framework
+ # to be able to use trex_stl-*()
+ tg_instance = BuiltIn().get_library_instance(
+ 'resources.libraries.python.TrafficGenerator')
-__all__ = ['TrafficGenerator']
+ if tg_instance._node['subtype'] is None:
+ raise RuntimeError('TG subtype not defined')
+ elif tg_instance._node['subtype'] == NodeSubTypeTG.TREX:
+ unit_rate = str(rate) + self.get_rate_type_str()
+ tg_instance.trex_stl_start_remote_exec(self.get_duration(),
+ unit_rate, frame_size,
+ traffic_type)
+ loss = tg_instance.get_loss()
+ sent = tg_instance.get_sent()
+ if self.loss_acceptance_type_is_percentage():
+ loss = (float(loss) / float(sent)) * 100
+
+ logger.trace("comparing: {} < {} {}".format(loss,
+ loss_acceptance,
+ loss_acceptance_type))
+ if float(loss) > float(loss_acceptance):
+ return False
+ else:
+ return True
+ else:
+ raise NotImplementedError("TG subtype not supported")
+
+ def get_latency(self):
+ """Returns min/avg/max latency.
+
+ :returns: Latency stats.
+ :rtype: list
+ """
+ tg_instance = BuiltIn().get_library_instance(
+ 'resources.libraries.python.TrafficGenerator')
+ return tg_instance.get_latency_int()
class TrafficGenerator(object):
+ """Traffic Generator."""
+
+ # use one instance of TrafficGenerator for all tests in test suite
+ ROBOT_LIBRARY_SCOPE = 'TEST SUITE'
def __init__(self):
self._result = None
self._loss = None
self._sent = None
+ self._latency = None
self._received = None
+ self._node = None
+ # T-REX interface order mapping
+ self._ifaces_reordered = 0
+
+ def get_loss(self):
+ """Return number of lost packets.
+
+ :returns: Number of lost packets.
+ :rtype: str
+ """
+ return self._loss
+
+ def get_sent(self):
+ """Return number of sent packets.
+
+ :returns: Number of sent packets.
+ :rtype: str
+ """
+ return self._sent
+
+ def get_received(self):
+ """Return number of received packets.
+
+ :returns: Number of received packets.
+ :rtype: str
+ """
+ return self._received
+
+ def get_latency_int(self):
+ """Return rounded min/avg/max latency.
+
+ :returns: Latency stats.
+ :rtype: list
+ """
+ return self._latency
+
+ def initialize_traffic_generator(self, tg_node, tg_if1, tg_if2,
+ tg_if1_adj_node, tg_if1_adj_if,
+ tg_if2_adj_node, tg_if2_adj_if,
+ test_type):
+ """TG initialization.
+
+ :param tg_node: Traffic generator node.
+ :param tg_if1: TG - name of first interface.
+ :param tg_if2: TG - name of second interface.
+ :param tg_if1_adj_node: TG if1 adjecent node.
+ :param tg_if1_adj_if: TG if1 adjecent interface.
+ :param tg_if2_adj_node: TG if2 adjecent node.
+ :param tg_if2_adj_if: TG if2 adjecent interface.
+ :param test_type: 'L2' or 'L3' - src/dst MAC address.
+ :type tg_node: dict
+ :type tg_if1: str
+ :type tg_if2: str
+ :type tg_if1_adj_node: dict
+ :type tg_if1_adj_if: str
+ :type tg_if2_adj_node: dict
+ :type tg_if2_adj_if: str
+ :type test_type: str
+ :returns: nothing
+ :raises: RuntimeError in case of issue during initialization.
+ """
+
+ topo = Topology()
+
+ if tg_node['type'] != NodeType.TG:
+ raise RuntimeError('Node type is not a TG')
+ self._node = tg_node
+
+ if tg_node['subtype'] == NodeSubTypeTG.TREX:
+ trex_path = "/opt/trex-core-2.09"
+
+ ssh = SSH()
+ ssh.connect(tg_node)
+
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sudo -E sh -c '{}/resources/tools/t-rex/"
+ "t-rex-installer.sh'".format(Constants.REMOTE_FW_DIR),
+ timeout=1800)
+ if int(ret) != 0:
+ logger.error('trex installation failed: {0}'.format(
+ stdout + stderr))
+ raise RuntimeError('Installation of TG failed')
+
+ if1_pci = topo.get_interface_pci_addr(tg_node, tg_if1)
+ if2_pci = topo.get_interface_pci_addr(tg_node, tg_if2)
+ if1_mac = topo.get_interface_mac(tg_node, tg_if1)
+ if2_mac = topo.get_interface_mac(tg_node, tg_if2)
+
+ if test_type == 'L2':
+ if1_adj_mac = if2_mac
+ if2_adj_mac = if1_mac
+ elif test_type == 'L3':
+ if1_adj_mac = topo.get_interface_mac(tg_if1_adj_node,
+ tg_if1_adj_if)
+ if2_adj_mac = topo.get_interface_mac(tg_if2_adj_node,
+ tg_if2_adj_if)
+ else:
+ raise Exception("test_type unknown")
+
+ if min(if1_pci, if2_pci) != if1_pci:
+ if1_mac, if2_mac = if2_mac, if1_mac
+ if1_pci, if2_pci = if2_pci, if1_pci
+ if1_adj_mac, if2_adj_mac = if2_adj_mac, if1_adj_mac
+ self._ifaces_reordered = 1
+
+ if1_mac_hex = "0x"+if1_mac.replace(":", ",0x")
+ if2_mac_hex = "0x"+if2_mac.replace(":", ",0x")
+ if1_adj_mac_hex = "0x"+if1_adj_mac.replace(":", ",0x")
+ if2_adj_mac_hex = "0x"+if2_adj_mac.replace(":", ",0x")
+
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sudo sh -c 'cat << EOF > /etc/trex_cfg.yaml\n"
+ "- port_limit : 2\n"
+ " version : 2\n"
+ " interfaces : [\"{}\",\"{}\"]\n"
+ " port_info :\n"
+ " - dest_mac : [{}]\n"
+ " src_mac : [{}]\n"
+ " - dest_mac : [{}]\n"
+ " src_mac : [{}]\n"
+ "EOF'"\
+ .format(if1_pci, if2_pci,
+ if1_adj_mac_hex, if1_mac_hex,
+ if2_adj_mac_hex, if2_mac_hex))
+ if int(ret) != 0:
+ logger.error("failed to create t-rex config: {}"\
+ .format(stdout + stderr))
+ raise RuntimeError('trex config generation error')
+
+ max_startup_retries = 3
+ while max_startup_retries > 0:
+ # kill T-rex only if it is already running
+ (ret, _, _) = ssh.exec_command(
+ "sh -c 'pgrep t-rex && sudo pkill t-rex'")
+
+ # configure T-rex
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c 'cd {0}/scripts/ && sudo ./trex-cfg'"\
+ .format(trex_path))
+ if int(ret) != 0:
+ logger.error('trex-cfg failed: {0}'.format(stdout + stderr))
+ raise RuntimeError('trex-cfg failed')
+
+ # start T-rex
+ (ret, _, _) = ssh.exec_command(
+ "sh -c 'cd {0}/scripts/ && "
+ "sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /dev/null 2>&1 &'"
+ "> /dev/null"\
+ .format(trex_path))
+ if int(ret) != 0:
+ raise RuntimeError('t-rex-64 startup failed')
+ # get T-rex server info
+ (ret, _, _) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-server-info.py'"\
+ .format(Constants.REMOTE_FW_DIR),
+ timeout=120)
+ if int(ret) == 0:
+ # If we get info T-rex is running
+ return
+ # try again
+ max_startup_retries -= 1
+ # after max retries T-rex is still not responding to API
+ # critical error occured
+ raise RuntimeError('t-rex-64 startup failed')
- def send_traffic_on(self, node, tx_port, rx_port, duration, rate,
- framesize):
+
+ @staticmethod
+ def teardown_traffic_generator(node):
+ """TG teardown.
+
+ :param node: Traffic generator node.
+ :type node: dict
+ :returns: nothing
+ :raises: RuntimeError if T-rex teardown failed.
+ :raises: RuntimeError if node type is not a TG.
+ """
+ if node['type'] != NodeType.TG:
+ raise RuntimeError('Node type is not a TG')
+ if node['subtype'] == NodeSubTypeTG.TREX:
+ ssh = SSH()
+ ssh.connect(node)
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c 'sudo pkill t-rex'")
+ if int(ret) != 0:
+ logger.error('pkill t-rex failed: {0}'.format(stdout + stderr))
+ raise RuntimeError('pkill t-rex failed')
+
+ @staticmethod
+ def trex_stl_stop_remote_exec(node):
+ """Execute script on remote node over ssh to stop running traffic.
+
+ :param node: T-REX generator node.
+ :type node: dict
+ :returns: Nothing
+ :raises: RuntimeError if stop traffic script fails.
+ """
ssh = SSH()
ssh.connect(node)
(ret, stdout, stderr) = ssh.exec_command(
- "sh -c 'cd MoonGen && sudo -S build/MoonGen "
- "rfc2544/benchmarks/vpp-frameloss.lua --txport 0 --rxport 1 "
- "--duration {0} --rate {1} --framesize {2}'".format(
- duration, rate, framesize),
+ "sh -c '{}/resources/tools/t-rex/"
+ "t-rex-stateless-stop.py'".format(Constants.REMOTE_FW_DIR))
+ logger.trace(ret)
+ logger.trace(stdout)
+ logger.trace(stderr)
+
+ if int(ret) != 0:
+ raise RuntimeError('T-rex stateless runtime error')
+
+ def trex_stl_start_remote_exec(self, duration, rate, framesize,
+ traffic_type, async_call=False,
+ latency=True, warmup_time=5):
+ """Execute script on remote node over ssh to start traffic.
+
+ :param duration: Time expresed in seconds for how long to send traffic.
+ :param rate: Traffic rate expressed with units (pps, %)
+ :param framesize: L2 frame size to send (without padding and IPG).
+ :param traffic_type: Traffic profile.
+ :param async_call: If enabled then don't wait for all incomming trafic.
+ :param latency: With latency measurement.
+ :param warmup_time: Warmup time period.
+ :type duration: int
+ :type rate: str
+ :type framesize: int
+ :type traffic_type: str
+ :type async_call: bool
+ :type latency: bool
+ :type warmup_time: int
+ :returns: Nothing
+ :raises: NotImplementedError if traffic type is not supported.
+ :raises: RuntimeError in case of TG driver issue.
+ """
+ ssh = SSH()
+ ssh.connect(self._node)
+
+ _p0 = 1
+ _p1 = 2
+ _async = "--async" if async_call else ""
+ _latency = "--latency" if latency else ""
+
+ if self._ifaces_reordered != 0:
+ _p0, _p1 = _p1, _p0
+
+ if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} "
+ "--p{4}_src_start_ip 10.10.10.1 "
+ "--p{4}_src_end_ip 10.10.10.254 "
+ "--p{4}_dst_start_ip 20.20.20.1 "
+ "--p{5}_src_start_ip 20.20.20.1 "
+ "--p{5}_src_end_ip 20.20.20.254 "
+ "--p{5}_dst_start_ip 10.10.10.1 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv4"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} "
+ "--p{4}_src_start_ip 10.10.10.2 "
+ "--p{4}_src_end_ip 10.10.10.254 "
+ "--p{4}_dst_start_ip 20.20.20.2 "
+ "--p{5}_src_start_ip 20.20.20.2 "
+ "--p{5}_src_end_ip 20.20.20.254 "
+ "--p{5}_dst_start_ip 10.10.10.2 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv4-dst-10000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} "
+ "--p{4}_src_start_ip 10.0.0.1 "
+ "--p{4}_dst_start_ip 20.0.0.0 "
+ "--p{4}_dst_end_ip 20.0.39.15 "
+ "--p{5}_src_start_ip 20.0.0.1 "
+ "--p{5}_dst_start_ip 10.0.0.0 "
+ "--p{5}_dst_end_ip 10.0.39.15 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv4-dst-100000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} "
+ "--p{4}_src_start_ip 10.0.0.1 "
+ "--p{4}_dst_start_ip 20.0.0.0 "
+ "--p{4}_dst_end_ip 20.1.134.159 "
+ "--p{5}_src_start_ip 20.0.0.1 "
+ "--p{5}_dst_start_ip 10.0.0.0 "
+ "--p{5}_dst_end_ip 10.1.134.159 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv4-dst-1000000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} "
+ "--p{4}_src_start_ip 10.0.0.1 "
+ "--p{4}_dst_start_ip 20.0.0.0 "
+ "--p{4}_dst_end_ip 20.15.66.63 "
+ "--p{5}_src_start_ip 20.0.0.1 "
+ "--p{5}_dst_start_ip 10.0.0.0 "
+ "--p{5}_dst_end_ip 10.15.66.63 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv6"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} -6 "
+ "--p{4}_src_start_ip 2001:1::2 "
+ "--p{4}_src_end_ip 2001:1::FE "
+ "--p{4}_dst_start_ip 2001:2::2 "
+ "--p{5}_src_start_ip 2001:2::2 "
+ "--p{5}_src_end_ip 2001:2::FE "
+ "--p{5}_dst_start_ip 2001:1::2 "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv6-dst-10000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} -6 "
+ "--p{4}_src_start_ip 2001:1::1 "
+ "--p{4}_dst_start_ip 2001:2::0 "
+ "--p{4}_dst_end_ip 2001:2::270F "
+ "--p{5}_src_start_ip 2001:2::1 "
+ "--p{5}_dst_start_ip 2001:1::0 "
+ "--p{5}_dst_end_ip 2001:1::270F "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv6-dst-100000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} -6 "
+ "--p{4}_src_start_ip 2001:1::1 "
+ "--p{4}_dst_start_ip 2001:2::0 "
+ "--p{4}_dst_end_ip 2001:2::1:869F "
+ "--p{5}_src_start_ip 2001:2::1 "
+ "--p{5}_dst_start_ip 2001:1::0 "
+ "--p{5}_dst_end_ip 2001:1::1:869F "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ elif traffic_type in ["3-node-IPv6-dst-1000000"]:
+ (ret, stdout, stderr) = ssh.exec_command(
+ "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+ "--duration={1} -r {2} -s {3} -6 "
+ "--p{4}_src_start_ip 2001:1::1 "
+ "--p{4}_dst_start_ip 2001:2::0 "
+ "--p{4}_dst_end_ip 2001:2::F:423F "
+ "--p{5}_src_start_ip 2001:2::1 "
+ "--p{5}_dst_start_ip 2001:1::0 "
+ "--p{5}_dst_end_ip 2001:1::F:423F "
+ "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+ duration, rate, framesize,
+ _p0, _p1, _async, _latency,
+ warmup_time),
+ timeout=int(duration)+60)
+ else:
+ raise NotImplementedError('Unsupported traffic type')
logger.trace(ret)
logger.trace(stdout)
logger.trace(stderr)
- for line in stdout.splitlines():
- pass
+ if int(ret) != 0:
+ raise RuntimeError('T-rex stateless runtime error')
+ elif async_call:
+ #no result
+ self._received = None
+ self._sent = None
+ self._loss = None
+ self._latency = None
+ else:
+ # last line from console output
+ line = stdout.splitlines()[-1]
+
+ self._result = line
+ logger.info('TrafficGen result: {0}'.format(self._result))
+
+ self._received = self._result.split(', ')[1].split('=')[1]
+ self._sent = self._result.split(', ')[2].split('=')[1]
+ self._loss = self._result.split(', ')[3].split('=')[1]
+
+ self._latency = []
+ self._latency.append(self._result.split(', ')[4].split('=')[1])
+ self._latency.append(self._result.split(', ')[5].split('=')[1])
+
+ def stop_traffic_on_tg(self):
+ """Stop all traffic on TG.
+
+ :returns: Nothing
+ :raises: RuntimeError if TG is not set.
+ """
+ if self._node is None:
+ raise RuntimeError("TG is not set")
+ if self._node['subtype'] == NodeSubTypeTG.TREX:
+ self.trex_stl_stop_remote_exec(self._node)
+
+ def send_traffic_on_tg(self, duration, rate, framesize,
+ traffic_type, warmup_time=5, async_call=False,
+ latency=True):
+ """Send traffic from all configured interfaces on TG.
- self._result = line
- logger.info('TrafficGen result: {0}'.format(self._result))
+ :param duration: Duration of test traffic generation in seconds.
+ :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...).
+ :param framesize: Frame size (L2) in Bytes.
+ :param traffic_type: Traffic profile.
+ :param warmup_time: Warmup phase in seconds.
+ :param async_call: Async mode.
+ :param latency: With latency measurement.
+ :type duration: str
+ :type rate: str
+ :type framesize: str
+ :type traffic_type: str
+ :type warmup_time: int
+ :type async_call: bool
+ :type latency: bool
+ :returns: TG output.
+ :rtype: str
+ :raises: RuntimeError if TG is not set.
+ :raises: RuntimeError if node is not TG or subtype is not specified.
+ :raises: NotImplementedError if TG is not supported.
+ """
- self._loss = self._result.split(', ')[3].split('=')[1]
+ node = self._node
+ if node is None:
+ raise RuntimeError("TG is not set")
+
+ if node['type'] != NodeType.TG:
+ raise RuntimeError('Node type is not a TG')
+
+ if node['subtype'] is None:
+ raise RuntimeError('TG subtype not defined')
+ elif node['subtype'] == NodeSubTypeTG.TREX:
+ self.trex_stl_start_remote_exec(duration, rate, framesize,
+ traffic_type, async_call, latency,
+ warmup_time=warmup_time)
+ else:
+ raise NotImplementedError("TG subtype not supported")
return self._result
- def no_traffic_loss_occured(self):
+ def no_traffic_loss_occurred(self):
+ """Fail if loss occurred in traffic run.
+
+ :returns: nothing
+ :raises: Exception if loss occured.
+ """
if self._loss is None:
raise Exception('The traffic generation has not been issued')
if self._loss != '0':
- raise Exception('Traffic loss occured: {0}'.format(self._loss))
+ raise Exception('Traffic loss occurred: {0}'.format(self._loss))
+
+ def partial_traffic_loss_accepted(self, loss_acceptance,
+ loss_acceptance_type):
+ """Fail if loss is higher then accepted in traffic run.
+
+ :param loss_acceptance: Permitted drop ratio or frames count.
+ :param loss_acceptance_type: Type of permitted loss.
+ :type loss_acceptance: float
+ :type loss_acceptance_type: LossAcceptanceType
+ :returns: nothing
+ :raises: Exception if loss is above acceptance criteria.
+ """
+ if self._loss is None:
+ raise Exception('The traffic generation has not been issued')
+
+ if loss_acceptance_type == 'percentage':
+ loss = (float(self._loss) / float(self._sent)) * 100
+ elif loss_acceptance_type == 'frames':
+ loss = float(self._loss)
+ else:
+ raise Exception('Loss acceptance type not supported')
+
+ if loss > float(loss_acceptance):
+ raise Exception("Traffic loss {} above loss acceptance: {}".format(
+ loss, loss_acceptance))