1 # Copyright (c) 2018 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """Performance testing traffic generator library."""
16 from robot.api import logger
17 from robot.libraries.BuiltIn import BuiltIn
19 from resources.libraries.python.constants import Constants
20 from resources.libraries.python.ssh import SSH
21 from resources.libraries.python.topology import NodeType
22 from resources.libraries.python.topology import NodeSubTypeTG
23 from resources.libraries.python.topology import Topology
24 from resources.libraries.python.DropRateSearch import DropRateSearch
26 __all__ = ['TrafficGenerator', 'TGDropRateSearchImpl']
29 class TGDropRateSearchImpl(DropRateSearch):
30 """Drop Rate Search implementation."""
33 super(TGDropRateSearchImpl, self).__init__()
35 def measure_loss(self, rate, frame_size, loss_acceptance,
36 loss_acceptance_type, traffic_type):
37 """Runs the traffic and evaluate the measured results.
39 :param rate: Offered traffic load.
40 :param frame_size: Size of frame.
41 :param loss_acceptance: Permitted drop ratio or frames count.
42 :param loss_acceptance_type: Type of permitted loss.
43 :param traffic_type: Traffic profile ([2,3]-node-L[2,3], ...).
46 :type loss_acceptance: float
47 :type loss_acceptance_type: LossAcceptanceType
48 :type traffic_type: str
49 :returns: Drop threshold exceeded? (True/False)
51 :raises: NotImplementedError if TG is not supported.
52 :raises: RuntimeError if TG is not specified.
54 # we need instance of TrafficGenerator instantiated by Robot Framework
55 # to be able to use trex_stl-*()
56 tg_instance = BuiltIn().get_library_instance(
57 'resources.libraries.python.TrafficGenerator')
59 if tg_instance.node['subtype'] is None:
60 raise RuntimeError('TG subtype not defined')
61 elif tg_instance.node['subtype'] == NodeSubTypeTG.TREX:
62 unit_rate = str(rate) + self.get_rate_type_str()
63 tg_instance.trex_stl_start_remote_exec(self.get_duration(),
64 unit_rate, frame_size,
66 loss = tg_instance.get_loss()
67 sent = tg_instance.get_sent()
68 if self.loss_acceptance_type_is_percentage():
69 loss = (float(loss) / float(sent)) * 100
71 logger.trace("comparing: {} < {} {}".format(loss,
73 loss_acceptance_type))
74 if float(loss) > float(loss_acceptance):
79 raise NotImplementedError("TG subtype not supported")
81 def get_latency(self):
82 """Returns min/avg/max latency.
84 :returns: Latency stats.
87 tg_instance = BuiltIn().get_library_instance(
88 'resources.libraries.python.TrafficGenerator')
89 return tg_instance.get_latency_int()
92 class TrafficGenerator(object):
93 """Traffic Generator."""
95 # use one instance of TrafficGenerator for all tests in test suite
96 ROBOT_LIBRARY_SCOPE = 'TEST SUITE'
103 self._received = None
105 # T-REX interface order mapping
106 self._ifaces_reordered = False
112 :returns: Traffic generator node.
118 """Return number of lost packets.
120 :returns: Number of lost packets.
126 """Return number of sent packets.
128 :returns: Number of sent packets.
133 def get_received(self):
134 """Return number of received packets.
136 :returns: Number of received packets.
139 return self._received
141 def get_latency_int(self):
142 """Return rounded min/avg/max latency.
144 :returns: Latency stats.
149 def initialize_traffic_generator(self, tg_node, tg_if1, tg_if2,
150 tg_if1_adj_node, tg_if1_adj_if,
151 tg_if2_adj_node, tg_if2_adj_if,
153 tg_if1_dst_mac=None, tg_if2_dst_mac=None):
154 """TG initialization.
156 :param tg_node: Traffic generator node.
157 :param tg_if1: TG - name of first interface.
158 :param tg_if2: TG - name of second interface.
159 :param tg_if1_adj_node: TG if1 adjecent node.
160 :param tg_if1_adj_if: TG if1 adjecent interface.
161 :param tg_if2_adj_node: TG if2 adjecent node.
162 :param tg_if2_adj_if: TG if2 adjecent interface.
163 :param test_type: 'L2', 'L3' or 'L7' - OSI Layer testing type.
164 :param tg_if1_dst_mac: Interface 1 destination MAC address.
165 :param tg_if2_dst_mac: Interface 2 destination MAC address.
169 :type tg_if1_adj_node: dict
170 :type tg_if1_adj_if: str
171 :type tg_if2_adj_node: dict
172 :type tg_if2_adj_if: str
174 :type tg_if1_dst_mac: str
175 :type tg_if2_dst_mac: str
177 :raises: RuntimeError in case of issue during initialization.
179 if tg_node['type'] != NodeType.TG:
180 raise RuntimeError('Node type is not a TG')
183 if tg_node['subtype'] == NodeSubTypeTG.TREX:
187 (ret, _, _) = ssh.exec_command(
188 "sudo -E sh -c '{0}/resources/tools/trex/"
189 "trex_installer.sh {1}'".format(Constants.REMOTE_FW_DIR,
190 Constants.TREX_INSTALL_VERSION),
193 raise RuntimeError('TRex installation failed.')
195 if1_pci = Topology().get_interface_pci_addr(tg_node, tg_if1)
196 if2_pci = Topology().get_interface_pci_addr(tg_node, tg_if2)
197 if1_addr = Topology().get_interface_mac(tg_node, tg_if1)
198 if2_addr = Topology().get_interface_mac(tg_node, tg_if2)
200 if test_type == 'L2':
201 if1_adj_addr = if2_addr
202 if2_adj_addr = if1_addr
203 elif test_type == 'L3':
204 if1_adj_addr = Topology().get_interface_mac(tg_if1_adj_node,
206 if2_adj_addr = Topology().get_interface_mac(tg_if2_adj_node,
208 elif test_type == 'L7':
209 if1_addr = Topology().get_interface_ip4(tg_node, tg_if1)
210 if2_addr = Topology().get_interface_ip4(tg_node, tg_if2)
211 if1_adj_addr = Topology().get_interface_ip4(tg_if1_adj_node,
213 if2_adj_addr = Topology().get_interface_ip4(tg_if2_adj_node,
216 raise ValueError("Unknown Test Type")
218 # in case of switched environment we can override MAC addresses
219 if tg_if1_dst_mac is not None and tg_if2_dst_mac is not None:
220 if1_adj_addr = tg_if1_dst_mac
221 if2_adj_addr = tg_if2_dst_mac
223 if min(if1_pci, if2_pci) != if1_pci:
224 if1_pci, if2_pci = if2_pci, if1_pci
225 if1_addr, if2_addr = if2_addr, if1_addr
226 if1_adj_addr, if2_adj_addr = if2_adj_addr, if1_adj_addr
227 self._ifaces_reordered = True
229 if test_type == 'L2' or test_type == 'L3':
230 (ret, _, _) = ssh.exec_command(
231 "sudo sh -c 'cat << EOF > /etc/trex_cfg.yaml\n"
234 " interfaces: [\"{0}\",\"{1}\"]\n"
236 " - dest_mac: [{2}]\n"
238 " - dest_mac: [{4}]\n"
241 .format(if1_pci, if2_pci,
242 "0x"+if1_adj_addr.replace(":", ",0x"),
243 "0x"+if1_addr.replace(":", ",0x"),
244 "0x"+if2_adj_addr.replace(":", ",0x"),
245 "0x"+if2_addr.replace(":", ",0x")))
246 elif test_type == 'L7':
247 (ret, _, _) = ssh.exec_command(
248 "sudo sh -c 'cat << EOF > /etc/trex_cfg.yaml\n"
251 " interfaces: [\"{0}\",\"{1}\"]\n"
254 " default_gw: [{3}]\n"
256 " default_gw: [{5}]\n"
258 .format(if1_pci, if2_pci,
259 if1_addr, if1_adj_addr,
260 if2_addr, if2_adj_addr))
262 raise ValueError("Unknown Test Type")
264 raise RuntimeError('TRex config generation error')
266 for _ in range(0, 3):
267 # kill TRex only if it is already running
269 "sh -c 'pgrep t-rex && sudo pkill t-rex && sleep 3'")
272 (ret, _, _) = ssh.exec_command(
273 "sh -c 'cd {0}/scripts/ && sudo ./trex-cfg'"\
274 .format(Constants.TREX_INSTALL_DIR))
276 raise RuntimeError('trex-cfg failed')
279 if test_type == 'L2' or test_type == 'L3':
280 (ret, _, _) = ssh.exec_command(
281 "sh -c 'cd {0}/scripts/ && "
282 "sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /tmp/trex.log "
283 "2>&1 &' > /dev/null"\
284 .format(Constants.TREX_INSTALL_DIR))
285 elif test_type == 'L7':
286 (ret, _, _) = ssh.exec_command(
287 "sh -c 'cd {0}/scripts/ && "
288 "sudo nohup ./t-rex-64 --astf -i -c 7 --iom 0 > "
289 "/tmp/trex.log 2>&1 &' > /dev/null"\
290 .format(Constants.TREX_INSTALL_DIR))
292 raise ValueError("Unknown Test Type")
294 ssh.exec_command("sh -c 'cat /tmp/trex.log'")
295 raise RuntimeError('t-rex-64 startup failed')
297 # get TRex server info
298 (ret, _, _) = ssh.exec_command(
300 "{0}/resources/tools/trex/trex_server_info.py'"\
301 .format(Constants.REMOTE_FW_DIR),
304 # If we get info TRex is running
306 # after max retries TRex is still not responding to API
307 # critical error occurred
308 raise RuntimeError('t-rex-64 startup failed')
311 def teardown_traffic_generator(node):
314 :param node: Traffic generator node.
317 :raises: RuntimeError if TRex teardown failed.
318 :raises: RuntimeError if node type is not a TG.
320 if node['type'] != NodeType.TG:
321 raise RuntimeError('Node type is not a TG')
322 if node['subtype'] == NodeSubTypeTG.TREX:
325 (ret, _, _) = ssh.exec_command(
326 "sh -c 'sudo pkill t-rex && sleep 3'")
328 raise RuntimeError('pkill t-rex failed')
331 def trex_stl_stop_remote_exec(node):
332 """Execute script on remote node over ssh to stop running traffic.
334 :param node: TRex generator node.
337 :raises: RuntimeError if stop traffic script fails.
342 (ret, _, _) = ssh.exec_command(
343 "sh -c '{}/resources/tools/trex/"
344 "trex_stateless_stop.py'".format(Constants.REMOTE_FW_DIR))
347 raise RuntimeError('TRex stateless runtime error')
349 def trex_stl_start_remote_exec(self, duration, rate, framesize,
350 traffic_type, async_call=False,
351 latency=True, warmup_time=5):
352 """Execute script on remote node over ssh to start traffic.
354 :param duration: Time expresed in seconds for how long to send traffic.
355 :param rate: Traffic rate expressed with units (pps, %)
356 :param framesize: L2 frame size to send (without padding and IPG).
357 :param traffic_type: Traffic profile.
358 :param async_call: If enabled then don't wait for all incomming trafic.
359 :param latency: With latency measurement.
360 :param warmup_time: Warmup time period.
364 :type traffic_type: str
365 :type async_call: bool
367 :type warmup_time: int
369 :raises: RuntimeError in case of TG driver issue.
372 ssh.connect(self._node)
374 _async = "--async" if async_call else ""
375 _latency = "--latency" if latency else ""
376 _p0, _p1 = (2, 1) if self._ifaces_reordered else (1, 2)
378 profile_path = ("{0}/resources/traffic_profiles/trex/"
379 "{1}.py".format(Constants.REMOTE_FW_DIR,
381 (ret, stdout, _) = ssh.exec_command(
383 "'{0}/resources/tools/trex/trex_stateless_profile.py "
393 format(Constants.REMOTE_FW_DIR, profile_path, duration, framesize,
394 rate, warmup_time, _p0 - 1, _p1 - 1, _async, _latency),
395 timeout=int(duration) + 60)
398 raise RuntimeError('TRex stateless runtime error')
401 self._received = None
406 # last line from console output
407 line = stdout.splitlines()[-1]
410 logger.info('TrafficGen result: {0}'.format(self._result))
412 self._received = self._result.split(', ')[1].split('=')[1]
413 self._sent = self._result.split(', ')[2].split('=')[1]
414 self._loss = self._result.split(', ')[3].split('=')[1]
417 self._latency.append(self._result.split(', ')[4].split('=')[1])
418 self._latency.append(self._result.split(', ')[5].split('=')[1])
420 def stop_traffic_on_tg(self):
421 """Stop all traffic on TG.
424 :raises: RuntimeError if TG is not set.
426 if self._node is None:
427 raise RuntimeError("TG is not set")
428 if self._node['subtype'] == NodeSubTypeTG.TREX:
429 self.trex_stl_stop_remote_exec(self._node)
431 def send_traffic_on_tg(self, duration, rate, framesize,
432 traffic_type, warmup_time=5, async_call=False,
434 """Send traffic from all configured interfaces on TG.
436 :param duration: Duration of test traffic generation in seconds.
437 :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...).
438 :param framesize: Frame size (L2) in Bytes.
439 :param traffic_type: Traffic profile.
440 :param warmup_time: Warmup phase in seconds.
441 :param async_call: Async mode.
442 :param latency: With latency measurement.
446 :type traffic_type: str
447 :type warmup_time: int
448 :type async_call: bool
452 :raises: RuntimeError if TG is not set.
453 :raises: RuntimeError if node is not TG or subtype is not specified.
454 :raises: NotImplementedError if TG is not supported.
459 raise RuntimeError("TG is not set")
461 if node['type'] != NodeType.TG:
462 raise RuntimeError('Node type is not a TG')
464 if node['subtype'] is None:
465 raise RuntimeError('TG subtype not defined')
466 elif node['subtype'] == NodeSubTypeTG.TREX:
467 self.trex_stl_start_remote_exec(int(duration), rate, framesize,
468 traffic_type, async_call, latency,
469 warmup_time=warmup_time)
471 raise NotImplementedError("TG subtype not supported")
475 def no_traffic_loss_occurred(self):
476 """Fail if loss occurred in traffic run.
479 :raises: Exception if loss occured.
481 if self._loss is None:
482 raise Exception('The traffic generation has not been issued')
483 if self._loss != '0':
484 raise Exception('Traffic loss occurred: {0}'.format(self._loss))
486 def partial_traffic_loss_accepted(self, loss_acceptance,
487 loss_acceptance_type):
488 """Fail if loss is higher then accepted in traffic run.
490 :param loss_acceptance: Permitted drop ratio or frames count.
491 :param loss_acceptance_type: Type of permitted loss.
492 :type loss_acceptance: float
493 :type loss_acceptance_type: LossAcceptanceType
495 :raises: Exception if loss is above acceptance criteria.
497 if self._loss is None:
498 raise Exception('The traffic generation has not been issued')
500 if loss_acceptance_type == 'percentage':
501 loss = (float(self._loss) / float(self._sent)) * 100
502 elif loss_acceptance_type == 'frames':
503 loss = float(self._loss)
505 raise Exception('Loss acceptance type not supported')
507 if loss > float(loss_acceptance):
508 raise Exception("Traffic loss {} above loss acceptance: {}".format(
509 loss, loss_acceptance))