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')
- if tg_instance._node['subtype'] is None:
- raise Exception('TG subtype not defined')
- elif tg_instance._node['subtype'] == NodeSubTypeTG.TREX:
+ 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)
- # Get latency stats from stream
- self._latency_stats = tg_instance.get_latency()
-
loss = tg_instance.get_loss()
sent = tg_instance.get_sent()
if self.loss_acceptance_type_is_percentage():
loss = (float(loss) / float(sent)) * 100
- # TODO: getters for tg_instance
logger.trace("comparing: {} < {} {}".format(loss,
loss_acceptance,
loss_acceptance_type))
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."""
# T-REX interface order mapping
self._ifaces_reordered = 0
+ @property
+ def node(self):
+ """Getter.
+
+ :returns: Traffic generator node.
+ :rtype: dict
+ """
+ return self._node
+
def get_loss(self):
"""Return number of lost packets.
- :return: Number of lost packets.
+ :returns: Number of lost packets.
:rtype: str
"""
return self._loss
def get_sent(self):
"""Return number of sent packets.
- :return: Number of sent packets.
+ :returns: Number of sent packets.
:rtype: str
"""
return self._sent
def get_received(self):
"""Return number of received packets.
- :return: Number of received packets.
+ :returns: Number of received packets.
:rtype: str
"""
return self._received
- def get_latency(self):
- """Return min/avg/max latency.
+ def get_latency_int(self):
+ """Return rounded min/avg/max latency.
- :return: Latency stats.
+ :returns: Latency stats.
:rtype: list
"""
return self._latency
- #pylint: disable=too-many-arguments, too-many-locals
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,
: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.
- :test_type: 'L2' or 'L3' - src/dst MAC address.
+ :param test_type: 'L2' or 'L3' - src/dst MAC address.
:type tg_node: dict
:type tg_if1: str
:type tg_if2: str
:type tg_if2_adj_node: dict
:type tg_if2_adj_if: str
:type test_type: str
- :return: nothing
+ :returns: nothing
+ :raises: RuntimeError in case of issue during initialization.
"""
topo = Topology()
if tg_node['type'] != NodeType.TG:
- raise Exception('Node type is not a TG')
+ raise RuntimeError('Node type is not a TG')
self._node = tg_node
if tg_node['subtype'] == NodeSubTypeTG.TREX:
- trex_path = "/opt/trex-core-2.07"
+ trex_path = "/opt/trex-core-2.09"
ssh = SSH()
ssh.connect(tg_node)
(ret, stdout, stderr) = ssh.exec_command(
- "sudo sh -c '{}/resources/tools/t-rex/"
+ "sudo -E sh -c '{}/resources/tools/t-rex/"
"t-rex-installer.sh'".format(Constants.REMOTE_FW_DIR),
timeout=1800)
if int(ret) != 0:
.format(stdout + stderr))
raise RuntimeError('trex config generation error')
- (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')
-
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/ && "
:param node: Traffic generator node.
:type node: dict
- :return: nothing
+ :returns: nothing
+ :raises: RuntimeError if T-rex teardown failed.
+ :raises: RuntimeError if node type is not a TG.
"""
if node['type'] != NodeType.TG:
- raise Exception('Node type is not a TG')
+ raise RuntimeError('Node type is not a TG')
if node['subtype'] == NodeSubTypeTG.TREX:
ssh = SSH()
ssh.connect(node)
:param node: T-REX generator node.
:type node: dict
- :return: Nothing
+ :returns: Nothing
+ :raises: RuntimeError if stop traffic script fails.
"""
ssh = SSH()
ssh.connect(node)
:type async_call: bool
:type latency: bool
:type warmup_time: int
- :return: Nothing
+ :returns: Nothing
+ :raises: NotImplementedError if traffic type is not supported.
+ :raises: RuntimeError in case of TG driver issue.
"""
ssh = SSH()
ssh.connect(self._node)
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
+ """Stop all traffic on TG.
- :return: Nothing
+ :returns: Nothing
+ :raises: RuntimeError if TG is not set.
"""
if self._node is None:
raise RuntimeError("TG is not set")
: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
- :return: TG output.
+ :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.
"""
node = self._node
raise RuntimeError("TG is not set")
if node['type'] != NodeType.TG:
- raise Exception('Node type is not a TG')
+ raise RuntimeError('Node type is not a TG')
if node['subtype'] is None:
- raise Exception('TG subtype not defined')
+ 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,
def no_traffic_loss_occurred(self):
"""Fail if loss occurred in traffic run.
- :return: nothing
+ :returns: nothing
+ :raises: Exception if loss occured.
"""
if self._loss is None:
raise Exception('The traffic generation has not been issued')
loss_acceptance_type):
"""Fail if loss is higher then accepted in traffic run.
- :return: nothing
+ :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')
Code Review / csit.git / blobdiff