CSIT-516: Add keywords for 2-node topology
[csit.git] / resources / libraries / python / TrafficGenerator.py
1 # Copyright (c) 2016 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:
5 #
6 #     http://www.apache.org/licenses/LICENSE-2.0
7 #
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.
13
14 """Performance testing traffic generator library."""
15
16 from robot.api import logger
17 from robot.libraries.BuiltIn import BuiltIn
18
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
25
26 __all__ = ['TrafficGenerator', 'TGDropRateSearchImpl']
27
28
29 class TGDropRateSearchImpl(DropRateSearch):
30     """Drop Rate Search implementation."""
31
32     def __init__(self):
33         super(TGDropRateSearchImpl, self).__init__()
34
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.
38
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], ...).
44         :type rate: int
45         :type frame_size: str
46         :type loss_acceptance: float
47         :type loss_acceptance_type: LossAcceptanceType
48         :type traffic_type: str
49         :returns: Drop threshold exceeded? (True/False)
50         :rtype: bool
51         :raises: NotImplementedError if TG is not supported.
52         :raises: RuntimeError if TG is not specified.
53         """
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')
58
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,
65                                                    traffic_type)
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
70
71             logger.trace("comparing: {} < {} {}".format(loss,
72                                                         loss_acceptance,
73                                                         loss_acceptance_type))
74             if float(loss) > float(loss_acceptance):
75                 return False
76             else:
77                 return True
78         else:
79             raise NotImplementedError("TG subtype not supported")
80
81     def get_latency(self):
82         """Returns min/avg/max latency.
83
84         :returns: Latency stats.
85         :rtype: list
86         """
87         tg_instance = BuiltIn().get_library_instance(
88             'resources.libraries.python.TrafficGenerator')
89         return tg_instance.get_latency_int()
90
91
92 class TrafficGenerator(object):
93     """Traffic Generator."""
94
95     # use one instance of TrafficGenerator for all tests in test suite
96     ROBOT_LIBRARY_SCOPE = 'TEST SUITE'
97
98     def __init__(self):
99         self._result = None
100         self._loss = None
101         self._sent = None
102         self._latency = None
103         self._received = None
104         self._node = None
105         # T-REX interface order mapping
106         self._ifaces_reordered = 0
107
108     @property
109     def node(self):
110         """Getter.
111
112         :returns: Traffic generator node.
113         :rtype: dict
114         """
115         return self._node
116
117     def get_loss(self):
118         """Return number of lost packets.
119
120         :returns: Number of lost packets.
121         :rtype: str
122         """
123         return self._loss
124
125     def get_sent(self):
126         """Return number of sent packets.
127
128         :returns: Number of sent packets.
129         :rtype: str
130         """
131         return self._sent
132
133     def get_received(self):
134         """Return number of received packets.
135
136         :returns: Number of received packets.
137         :rtype: str
138         """
139         return self._received
140
141     def get_latency_int(self):
142         """Return rounded min/avg/max latency.
143
144         :returns: Latency stats.
145         :rtype: list
146         """
147         return self._latency
148
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,
152                                      test_type,
153                                      tg_if1_dst_mac=None, tg_if2_dst_mac=None):
154         """TG initialization.
155
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' or 'L3' - src/dst MAC address.
164         :param tg_if1_dst_mac: Interface 1 destination MAC address.
165         :param tg_if2_dst_mac: Interface 2 destination MAC address.
166         :type tg_node: dict
167         :type tg_if1: str
168         :type tg_if2: str
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
173         :type test_type: str
174         :type tg_if1_dst_mac: str
175         :type tg_if2_dst_mac: str
176         :returns: nothing
177         :raises: RuntimeError in case of issue during initialization.
178         """
179
180         topo = Topology()
181
182         if tg_node['type'] != NodeType.TG:
183             raise RuntimeError('Node type is not a TG')
184         self._node = tg_node
185
186         if tg_node['subtype'] == NodeSubTypeTG.TREX:
187             trex_path = "/opt/trex-core-2.09"
188
189             ssh = SSH()
190             ssh.connect(tg_node)
191
192             (ret, stdout, stderr) = ssh.exec_command(
193                 "sudo -E sh -c '{}/resources/tools/t-rex/"
194                 "t-rex-installer.sh'".format(Constants.REMOTE_FW_DIR),
195                 timeout=1800)
196             if int(ret) != 0:
197                 logger.error('trex installation failed: {0}'.format(
198                     stdout + stderr))
199                 raise RuntimeError('Installation of TG failed')
200
201             if1_pci = topo.get_interface_pci_addr(tg_node, tg_if1)
202             if2_pci = topo.get_interface_pci_addr(tg_node, tg_if2)
203             if1_mac = topo.get_interface_mac(tg_node, tg_if1)
204             if2_mac = topo.get_interface_mac(tg_node, tg_if2)
205
206             if test_type == 'L2':
207                 if1_adj_mac = if2_mac
208                 if2_adj_mac = if1_mac
209             elif test_type == 'L3':
210                 if1_adj_mac = topo.get_interface_mac(tg_if1_adj_node,
211                                                      tg_if1_adj_if)
212                 if2_adj_mac = topo.get_interface_mac(tg_if2_adj_node,
213                                                      tg_if2_adj_if)
214             else:
215                 raise ValueError("test_type unknown")
216
217             if tg_if1_dst_mac is not None and tg_if2_dst_mac is not None:
218                 if1_adj_mac = tg_if1_dst_mac
219                 if2_adj_mac = tg_if2_dst_mac
220
221             if min(if1_pci, if2_pci) != if1_pci:
222                 if1_mac, if2_mac = if2_mac, if1_mac
223                 if1_pci, if2_pci = if2_pci, if1_pci
224                 if1_adj_mac, if2_adj_mac = if2_adj_mac, if1_adj_mac
225                 self._ifaces_reordered = 1
226
227             if1_mac_hex = "0x"+if1_mac.replace(":", ",0x")
228             if2_mac_hex = "0x"+if2_mac.replace(":", ",0x")
229             if1_adj_mac_hex = "0x"+if1_adj_mac.replace(":", ",0x")
230             if2_adj_mac_hex = "0x"+if2_adj_mac.replace(":", ",0x")
231
232             (ret, stdout, stderr) = ssh.exec_command(
233                 "sudo sh -c 'cat << EOF > /etc/trex_cfg.yaml\n"
234                 "- port_limit      : 2\n"
235                 "  version         : 2\n"
236                 "  interfaces      : [\"{}\",\"{}\"]\n"
237                 "  port_info       :\n"
238                 "          - dest_mac        :   [{}]\n"
239                 "            src_mac         :   [{}]\n"
240                 "          - dest_mac        :   [{}]\n"
241                 "            src_mac         :   [{}]\n"
242                 "EOF'"\
243                 .format(if1_pci, if2_pci,
244                         if1_adj_mac_hex, if1_mac_hex,
245                         if2_adj_mac_hex, if2_mac_hex))
246             if int(ret) != 0:
247                 logger.error("failed to create t-rex config: {}"\
248                 .format(stdout + stderr))
249                 raise RuntimeError('trex config generation error')
250
251             max_startup_retries = 3
252             while max_startup_retries > 0:
253                 # kill T-rex only if it is already running
254                 (ret, _, _) = ssh.exec_command(
255                     "sh -c 'pgrep t-rex && sudo pkill t-rex'")
256
257                 # configure T-rex
258                 (ret, stdout, stderr) = ssh.exec_command(
259                     "sh -c 'cd {0}/scripts/ && sudo ./trex-cfg'"\
260                     .format(trex_path))
261                 if int(ret) != 0:
262                     logger.error('trex-cfg failed: {0}'.format(stdout + stderr))
263                     raise RuntimeError('trex-cfg failed')
264
265                 # start T-rex
266                 (ret, _, _) = ssh.exec_command(
267                     "sh -c 'cd {0}/scripts/ && "
268                     "sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /dev/null 2>&1 &'"
269                     "> /dev/null"\
270                     .format(trex_path))
271                 if int(ret) != 0:
272                     raise RuntimeError('t-rex-64 startup failed')
273
274                 # get T-rex server info
275                 (ret, _, _) = ssh.exec_command(
276                     "sh -c '{0}/resources/tools/t-rex/t-rex-server-info.py'"\
277                     .format(Constants.REMOTE_FW_DIR),
278                     timeout=120)
279                 if int(ret) == 0:
280                     # If we get info T-rex is running
281                     return
282                 # try again
283                 max_startup_retries -= 1
284             # after max retries T-rex is still not responding to API
285             # critical error occured
286             raise RuntimeError('t-rex-64 startup failed')
287
288
289     @staticmethod
290     def teardown_traffic_generator(node):
291         """TG teardown.
292
293         :param node: Traffic generator node.
294         :type node: dict
295         :returns: nothing
296         :raises: RuntimeError if T-rex teardown failed.
297         :raises: RuntimeError if node type is not a TG.
298         """
299         if node['type'] != NodeType.TG:
300             raise RuntimeError('Node type is not a TG')
301         if node['subtype'] == NodeSubTypeTG.TREX:
302             ssh = SSH()
303             ssh.connect(node)
304             (ret, stdout, stderr) = ssh.exec_command(
305                 "sh -c 'sudo pkill t-rex'")
306             if int(ret) != 0:
307                 logger.error('pkill t-rex failed: {0}'.format(stdout + stderr))
308                 raise RuntimeError('pkill t-rex failed')
309
310     @staticmethod
311     def trex_stl_stop_remote_exec(node):
312         """Execute script on remote node over ssh to stop running traffic.
313
314         :param node: T-REX generator node.
315         :type node: dict
316         :returns: Nothing
317         :raises: RuntimeError if stop traffic script fails.
318         """
319         ssh = SSH()
320         ssh.connect(node)
321
322         (ret, stdout, stderr) = ssh.exec_command(
323             "sh -c '{}/resources/tools/t-rex/"
324             "t-rex-stateless-stop.py'".format(Constants.REMOTE_FW_DIR))
325         logger.trace(ret)
326         logger.trace(stdout)
327         logger.trace(stderr)
328
329         if int(ret) != 0:
330             raise RuntimeError('T-rex stateless runtime error')
331
332     def trex_stl_start_remote_exec(self, duration, rate, framesize,
333                                    traffic_type, async_call=False,
334                                    latency=True, warmup_time=5):
335         """Execute script on remote node over ssh to start traffic.
336
337         :param duration: Time expresed in seconds for how long to send traffic.
338         :param rate: Traffic rate expressed with units (pps, %)
339         :param framesize: L2 frame size to send (without padding and IPG).
340         :param traffic_type: Traffic profile.
341         :param async_call: If enabled then don't wait for all incomming trafic.
342         :param latency: With latency measurement.
343         :param warmup_time: Warmup time period.
344         :type duration: int
345         :type rate: str
346         :type framesize: int
347         :type traffic_type: str
348         :type async_call: bool
349         :type latency: bool
350         :type warmup_time: int
351         :returns: Nothing
352         :raises: NotImplementedError if traffic type is not supported.
353         :raises: RuntimeError in case of TG driver issue.
354         """
355         ssh = SSH()
356         ssh.connect(self._node)
357
358         _p0 = 1
359         _p1 = 2
360         _async = "--async" if async_call else ""
361         _latency = "--latency" if latency else ""
362
363         if self._ifaces_reordered != 0:
364             _p0, _p1 = _p1, _p0
365
366         if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
367             (ret, stdout, stderr) = ssh.exec_command(
368                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
369                 "--duration={1} -r {2} -s {3} "
370                 "--p{4}_src_start_ip 10.10.10.1 "
371                 "--p{4}_src_end_ip 10.10.10.254 "
372                 "--p{4}_dst_start_ip 20.20.20.1 "
373                 "--p{5}_src_start_ip 20.20.20.1 "
374                 "--p{5}_src_end_ip 20.20.20.254 "
375                 "--p{5}_dst_start_ip 10.10.10.1 "
376                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
377                                                     duration, rate, framesize,
378                                                     _p0, _p1, _async, _latency,
379                                                     warmup_time),
380                 timeout=int(duration)+60)
381         elif traffic_type in ["3-node-IPv4"]:
382             (ret, stdout, stderr) = ssh.exec_command(
383                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
384                 "--duration={1} -r {2} -s {3} "
385                 "--p{4}_src_start_ip 10.10.10.2 "
386                 "--p{4}_src_end_ip 10.10.10.254 "
387                 "--p{4}_dst_start_ip 20.20.20.2 "
388                 "--p{5}_src_start_ip 20.20.20.2 "
389                 "--p{5}_src_end_ip 20.20.20.254 "
390                 "--p{5}_dst_start_ip 10.10.10.2 "
391                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
392                                                     duration, rate, framesize,
393                                                     _p0, _p1, _async, _latency,
394                                                     warmup_time),
395                 timeout=int(duration)+60)
396         elif traffic_type in ["3-node-IPv4-dst-10000"]:
397             (ret, stdout, stderr) = ssh.exec_command(
398                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
399                 "--duration={1} -r {2} -s {3} "
400                 "--p{4}_src_start_ip 10.0.0.1 "
401                 "--p{4}_dst_start_ip 20.0.0.0 "
402                 "--p{4}_dst_end_ip 20.0.39.15 "
403                 "--p{5}_src_start_ip 20.0.0.1 "
404                 "--p{5}_dst_start_ip 10.0.0.0 "
405                 "--p{5}_dst_end_ip 10.0.39.15 "
406                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
407                                                     duration, rate, framesize,
408                                                     _p0, _p1, _async, _latency,
409                                                     warmup_time),
410                 timeout=int(duration)+60)
411         elif traffic_type in ["3-node-IPv4-dst-100000"]:
412             (ret, stdout, stderr) = ssh.exec_command(
413                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
414                 "--duration={1} -r {2} -s {3} "
415                 "--p{4}_src_start_ip 10.0.0.1 "
416                 "--p{4}_dst_start_ip 20.0.0.0 "
417                 "--p{4}_dst_end_ip 20.1.134.159 "
418                 "--p{5}_src_start_ip 20.0.0.1 "
419                 "--p{5}_dst_start_ip 10.0.0.0 "
420                 "--p{5}_dst_end_ip 10.1.134.159 "
421                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
422                                                     duration, rate, framesize,
423                                                     _p0, _p1, _async, _latency,
424                                                     warmup_time),
425                 timeout=int(duration)+60)
426         elif traffic_type in ["3-node-IPv4-dst-1000000"]:
427             (ret, stdout, stderr) = ssh.exec_command(
428                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
429                 "--duration={1} -r {2} -s {3} "
430                 "--p{4}_src_start_ip 10.0.0.1 "
431                 "--p{4}_dst_start_ip 20.0.0.0 "
432                 "--p{4}_dst_end_ip 20.15.66.63 "
433                 "--p{5}_src_start_ip 20.0.0.1 "
434                 "--p{5}_dst_start_ip 10.0.0.0 "
435                 "--p{5}_dst_end_ip 10.15.66.63 "
436                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
437                                                     duration, rate, framesize,
438                                                     _p0, _p1, _async, _latency,
439                                                     warmup_time),
440                 timeout=int(duration)+60)
441         elif traffic_type in ["3-node-IPv6"]:
442             (ret, stdout, stderr) = ssh.exec_command(
443                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
444                 "--duration={1} -r {2} -s {3} -6 "
445                 "--p{4}_src_start_ip 2001:1::2 "
446                 "--p{4}_src_end_ip 2001:1::FE "
447                 "--p{4}_dst_start_ip 2001:2::2 "
448                 "--p{5}_src_start_ip 2001:2::2 "
449                 "--p{5}_src_end_ip 2001:2::FE "
450                 "--p{5}_dst_start_ip 2001:1::2 "
451                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
452                                                     duration, rate, framesize,
453                                                     _p0, _p1, _async, _latency,
454                                                     warmup_time),
455                 timeout=int(duration)+60)
456         elif traffic_type in ["3-node-IPv6-dst-10000"]:
457             (ret, stdout, stderr) = ssh.exec_command(
458                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
459                 "--duration={1} -r {2} -s {3} -6 "
460                 "--p{4}_src_start_ip 2001:1::1 "
461                 "--p{4}_dst_start_ip 2001:2::0 "
462                 "--p{4}_dst_end_ip 2001:2::270F "
463                 "--p{5}_src_start_ip 2001:2::1 "
464                 "--p{5}_dst_start_ip 2001:1::0 "
465                 "--p{5}_dst_end_ip 2001:1::270F "
466                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
467                                                     duration, rate, framesize,
468                                                     _p0, _p1, _async, _latency,
469                                                     warmup_time),
470                 timeout=int(duration)+60)
471         elif traffic_type in ["3-node-IPv6-dst-100000"]:
472             (ret, stdout, stderr) = ssh.exec_command(
473                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
474                 "--duration={1} -r {2} -s {3} -6 "
475                 "--p{4}_src_start_ip 2001:1::1 "
476                 "--p{4}_dst_start_ip 2001:2::0 "
477                 "--p{4}_dst_end_ip 2001:2::1:869F "
478                 "--p{5}_src_start_ip 2001:2::1 "
479                 "--p{5}_dst_start_ip 2001:1::0 "
480                 "--p{5}_dst_end_ip 2001:1::1:869F "
481                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
482                                                     duration, rate, framesize,
483                                                     _p0, _p1, _async, _latency,
484                                                     warmup_time),
485                 timeout=int(duration)+60)
486         elif traffic_type in ["3-node-IPv6-dst-1000000"]:
487             (ret, stdout, stderr) = ssh.exec_command(
488                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
489                 "--duration={1} -r {2} -s {3} -6 "
490                 "--p{4}_src_start_ip 2001:1::1 "
491                 "--p{4}_dst_start_ip 2001:2::0 "
492                 "--p{4}_dst_end_ip 2001:2::F:423F "
493                 "--p{5}_src_start_ip 2001:2::1 "
494                 "--p{5}_dst_start_ip 2001:1::0 "
495                 "--p{5}_dst_end_ip 2001:1::F:423F "
496                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
497                                                     duration, rate, framesize,
498                                                     _p0, _p1, _async, _latency,
499                                                     warmup_time),
500                 timeout=int(duration)+60)
501         elif traffic_type in ["2-node-bridge"]:
502             (ret, stdout, stderr) = ssh.exec_command(
503                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
504                 "--duration={1} -r {2} -s {3} "
505                 "--p{4}_src_start_ip 10.10.10.2 "
506                 "--p{4}_src_end_ip 10.10.10.254 "
507                 "--p{4}_dst_start_ip 20.20.20.2 "
508                 "--p{5}_src_start_ip 20.20.20.2 "
509                 "--p{5}_src_end_ip 20.20.20.254 "
510                 "--p{5}_dst_start_ip 10.10.10.2 "
511                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
512                                                     duration, rate, framesize,
513                                                     _p0, _p1, _async, _latency,
514                                                     warmup_time),
515                 timeout = int(duration) + 60)
516         else:
517             raise NotImplementedError('Unsupported traffic type')
518
519         logger.trace(ret)
520         logger.trace(stdout)
521         logger.trace(stderr)
522
523         if int(ret) != 0:
524             raise RuntimeError('T-rex stateless runtime error')
525         elif async_call:
526             #no result
527             self._received = None
528             self._sent = None
529             self._loss = None
530             self._latency = None
531         else:
532             # last line from console output
533             line = stdout.splitlines()[-1]
534
535             self._result = line
536             logger.info('TrafficGen result: {0}'.format(self._result))
537
538             self._received = self._result.split(', ')[1].split('=')[1]
539             self._sent = self._result.split(', ')[2].split('=')[1]
540             self._loss = self._result.split(', ')[3].split('=')[1]
541
542             self._latency = []
543             self._latency.append(self._result.split(', ')[4].split('=')[1])
544             self._latency.append(self._result.split(', ')[5].split('=')[1])
545
546     def stop_traffic_on_tg(self):
547         """Stop all traffic on TG.
548
549         :returns: Nothing
550         :raises: RuntimeError if TG is not set.
551         """
552         if self._node is None:
553             raise RuntimeError("TG is not set")
554         if self._node['subtype'] == NodeSubTypeTG.TREX:
555             self.trex_stl_stop_remote_exec(self._node)
556
557     def send_traffic_on_tg(self, duration, rate, framesize,
558                            traffic_type, warmup_time=5, async_call=False,
559                            latency=True):
560         """Send traffic from all configured interfaces on TG.
561
562         :param duration: Duration of test traffic generation in seconds.
563         :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...).
564         :param framesize: Frame size (L2) in Bytes.
565         :param traffic_type: Traffic profile.
566         :param warmup_time: Warmup phase in seconds.
567         :param async_call: Async mode.
568         :param latency: With latency measurement.
569         :type duration: str
570         :type rate: str
571         :type framesize: str
572         :type traffic_type: str
573         :type warmup_time: int
574         :type async_call: bool
575         :type latency: bool
576         :returns: TG output.
577         :rtype: str
578         :raises: RuntimeError if TG is not set.
579         :raises: RuntimeError if node is not TG or subtype is not specified.
580         :raises: NotImplementedError if TG is not supported.
581         """
582
583         node = self._node
584         if node is None:
585             raise RuntimeError("TG is not set")
586
587         if node['type'] != NodeType.TG:
588             raise RuntimeError('Node type is not a TG')
589
590         if node['subtype'] is None:
591             raise RuntimeError('TG subtype not defined')
592         elif node['subtype'] == NodeSubTypeTG.TREX:
593             self.trex_stl_start_remote_exec(duration, rate, framesize,
594                                             traffic_type, async_call, latency,
595                                             warmup_time=warmup_time)
596         else:
597             raise NotImplementedError("TG subtype not supported")
598
599         return self._result
600
601     def no_traffic_loss_occurred(self):
602         """Fail if loss occurred in traffic run.
603
604         :returns: nothing
605         :raises: Exception if loss occured.
606         """
607         if self._loss is None:
608             raise Exception('The traffic generation has not been issued')
609         if self._loss != '0':
610             raise Exception('Traffic loss occurred: {0}'.format(self._loss))
611
612     def partial_traffic_loss_accepted(self, loss_acceptance,
613                                       loss_acceptance_type):
614         """Fail if loss is higher then accepted in traffic run.
615
616         :param loss_acceptance: Permitted drop ratio or frames count.
617         :param loss_acceptance_type: Type of permitted loss.
618         :type loss_acceptance: float
619         :type loss_acceptance_type: LossAcceptanceType
620         :returns: nothing
621         :raises: Exception if loss is above acceptance criteria.
622         """
623         if self._loss is None:
624             raise Exception('The traffic generation has not been issued')
625
626         if loss_acceptance_type == 'percentage':
627             loss = (float(self._loss) / float(self._sent)) * 100
628         elif loss_acceptance_type == 'frames':
629             loss = float(self._loss)
630         else:
631             raise Exception('Loss acceptance type not supported')
632
633         if loss > float(loss_acceptance):
634             raise Exception("Traffic loss {} above loss acceptance: {}".format(
635                 loss, loss_acceptance))

©2016 FD.io a Linux Foundation Collaborative Project. All Rights Reserved.
Linux Foundation is a registered trademark of The Linux Foundation. Linux is a registered trademark of Linus Torvalds.
Please see our privacy policy and terms of use.