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-2.22"
 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 && sleep 3'")
 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 'sleep 3; "
 277                     "{0}/resources/tools/t-rex/t-rex-server-info.py'"\
 278                     .format(Constants.REMOTE_FW_DIR),
 279                     timeout=120)
 280                 if int(ret) == 0:
 281                     # If we get info T-rex is running
 282                     return
 283                 # try again
 284                 max_startup_retries -= 1
 285             # after max retries T-rex is still not responding to API
 286             # critical error occured
 287             raise RuntimeError('t-rex-64 startup failed')
 288
 289
 290     @staticmethod
 291     def teardown_traffic_generator(node):
 292         """TG teardown.
 293
 294         :param node: Traffic generator node.
 295         :type node: dict
 296         :returns: nothing
 297         :raises: RuntimeError if T-rex teardown failed.
 298         :raises: RuntimeError if node type is not a TG.
 299         """
 300         if node['type'] != NodeType.TG:
 301             raise RuntimeError('Node type is not a TG')
 302         if node['subtype'] == NodeSubTypeTG.TREX:
 303             ssh = SSH()
 304             ssh.connect(node)
 305             (ret, stdout, stderr) = ssh.exec_command(
 306                 "sh -c 'sudo pkill t-rex && sleep 3'")
 307             if int(ret) != 0:
 308                 logger.error('pkill t-rex failed: {0}'.format(stdout + stderr))
 309                 raise RuntimeError('pkill t-rex failed')
 310
 311     @staticmethod
 312     def trex_stl_stop_remote_exec(node):
 313         """Execute script on remote node over ssh to stop running traffic.
 314
 315         :param node: T-REX generator node.
 316         :type node: dict
 317         :returns: Nothing
 318         :raises: RuntimeError if stop traffic script fails.
 319         """
 320         ssh = SSH()
 321         ssh.connect(node)
 322
 323         (ret, stdout, stderr) = ssh.exec_command(
 324             "sh -c '{}/resources/tools/t-rex/"
 325             "t-rex-stateless-stop.py'".format(Constants.REMOTE_FW_DIR))
 326         logger.trace(ret)
 327         logger.trace(stdout)
 328         logger.trace(stderr)
 329
 330         if int(ret) != 0:
 331             raise RuntimeError('T-rex stateless runtime error')
 332
 333     def trex_stl_start_remote_exec(self, duration, rate, framesize,
 334                                    traffic_type, async_call=False,
 335                                    latency=True, warmup_time=5):
 336         """Execute script on remote node over ssh to start traffic.
 337
 338         :param duration: Time expresed in seconds for how long to send traffic.
 339         :param rate: Traffic rate expressed with units (pps, %)
 340         :param framesize: L2 frame size to send (without padding and IPG).
 341         :param traffic_type: Traffic profile.
 342         :param async_call: If enabled then don't wait for all incomming trafic.
 343         :param latency: With latency measurement.
 344         :param warmup_time: Warmup time period.
 345         :type duration: int
 346         :type rate: str
 347         :type framesize: int
 348         :type traffic_type: str
 349         :type async_call: bool
 350         :type latency: bool
 351         :type warmup_time: int
 352         :returns: Nothing
 353         :raises: NotImplementedError if traffic type is not supported.
 354         :raises: RuntimeError in case of TG driver issue.
 355         """
 356         ssh = SSH()
 357         ssh.connect(self._node)
 358
 359         _p0 = 1
 360         _p1 = 2
 361         _async = "--async" if async_call else ""
 362         _latency = "--latency" if latency else ""
 363
 364         if self._ifaces_reordered != 0:
 365             _p0, _p1 = _p1, _p0
 366
 367         if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
 368             (ret, stdout, stderr) = ssh.exec_command(
 369                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 370                 "--duration={1} -r {2} -s {3} "
 371                 "--p{4}_src_start_ip 10.10.10.1 "
 372                 "--p{4}_src_end_ip 10.10.10.254 "
 373                 "--p{4}_dst_start_ip 20.20.20.1 "
 374                 "--p{5}_src_start_ip 20.20.20.1 "
 375                 "--p{5}_src_end_ip 20.20.20.254 "
 376                 "--p{5}_dst_start_ip 10.10.10.1 "
 377                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 378                                                     duration, rate, framesize,
 379                                                     _p0, _p1, _async, _latency,
 380                                                     warmup_time),
 381                 timeout=int(duration)+60)
 382         elif traffic_type in ["3-node-IPv4"]:
 383             (ret, stdout, stderr) = ssh.exec_command(
 384                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 385                 "--duration={1} -r {2} -s {3} "
 386                 "--p{4}_src_start_ip 10.10.10.2 "
 387                 "--p{4}_src_end_ip 10.10.10.254 "
 388                 "--p{4}_dst_start_ip 20.20.20.2 "
 389                 "--p{5}_src_start_ip 20.20.20.2 "
 390                 "--p{5}_src_end_ip 20.20.20.254 "
 391                 "--p{5}_dst_start_ip 10.10.10.2 "
 392                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 393                                                     duration, rate, framesize,
 394                                                     _p0, _p1, _async, _latency,
 395                                                     warmup_time),
 396                 timeout=int(duration)+60)
 397         elif traffic_type in ["3-node-IPv4-dst-10000"]:
 398             (ret, stdout, stderr) = ssh.exec_command(
 399                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 400                 "--duration={1} -r {2} -s {3} "
 401                 "--p{4}_src_start_ip 10.0.0.1 "
 402                 "--p{4}_dst_start_ip 20.0.0.0 "
 403                 "--p{4}_dst_end_ip 20.0.39.15 "
 404                 "--p{5}_src_start_ip 20.0.0.1 "
 405                 "--p{5}_dst_start_ip 10.0.0.0 "
 406                 "--p{5}_dst_end_ip 10.0.39.15 "
 407                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 408                                                     duration, rate, framesize,
 409                                                     _p0, _p1, _async, _latency,
 410                                                     warmup_time),
 411                 timeout=int(duration)+60)
 412         elif traffic_type in ["3-node-IPv4-dst-100000"]:
 413             (ret, stdout, stderr) = ssh.exec_command(
 414                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 415                 "--duration={1} -r {2} -s {3} "
 416                 "--p{4}_src_start_ip 10.0.0.1 "
 417                 "--p{4}_dst_start_ip 20.0.0.0 "
 418                 "--p{4}_dst_end_ip 20.1.134.159 "
 419                 "--p{5}_src_start_ip 20.0.0.1 "
 420                 "--p{5}_dst_start_ip 10.0.0.0 "
 421                 "--p{5}_dst_end_ip 10.1.134.159 "
 422                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 423                                                     duration, rate, framesize,
 424                                                     _p0, _p1, _async, _latency,
 425                                                     warmup_time),
 426                 timeout=int(duration)+60)
 427         elif traffic_type in ["3-node-IPv4-dst-1000000"]:
 428             (ret, stdout, stderr) = ssh.exec_command(
 429                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 430                 "--duration={1} -r {2} -s {3} "
 431                 "--p{4}_src_start_ip 10.0.0.1 "
 432                 "--p{4}_dst_start_ip 20.0.0.0 "
 433                 "--p{4}_dst_end_ip 20.15.66.63 "
 434                 "--p{5}_src_start_ip 20.0.0.1 "
 435                 "--p{5}_dst_start_ip 10.0.0.0 "
 436                 "--p{5}_dst_end_ip 10.15.66.63 "
 437                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 438                                                     duration, rate, framesize,
 439                                                     _p0, _p1, _async, _latency,
 440                                                     warmup_time),
 441                 timeout=int(duration)+60)
 442         elif traffic_type in ["3-node-IPv6"]:
 443             (ret, stdout, stderr) = ssh.exec_command(
 444                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 445                 "--duration={1} -r {2} -s {3} -6 "
 446                 "--p{4}_src_start_ip 2001:1::2 "
 447                 "--p{4}_src_end_ip 2001:1::FE "
 448                 "--p{4}_dst_start_ip 2001:2::2 "
 449                 "--p{5}_src_start_ip 2001:2::2 "
 450                 "--p{5}_src_end_ip 2001:2::FE "
 451                 "--p{5}_dst_start_ip 2001:1::2 "
 452                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 453                                                     duration, rate, framesize,
 454                                                     _p0, _p1, _async, _latency,
 455                                                     warmup_time),
 456                 timeout=int(duration)+60)
 457         elif traffic_type in ["3-node-IPv6-dst-10000"]:
 458             (ret, stdout, stderr) = ssh.exec_command(
 459                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 460                 "--duration={1} -r {2} -s {3} -6 "
 461                 "--p{4}_src_start_ip 2001:1::1 "
 462                 "--p{4}_dst_start_ip 2001:2::0 "
 463                 "--p{4}_dst_end_ip 2001:2::270F "
 464                 "--p{5}_src_start_ip 2001:2::1 "
 465                 "--p{5}_dst_start_ip 2001:1::0 "
 466                 "--p{5}_dst_end_ip 2001:1::270F "
 467                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 468                                                     duration, rate, framesize,
 469                                                     _p0, _p1, _async, _latency,
 470                                                     warmup_time),
 471                 timeout=int(duration)+60)
 472         elif traffic_type in ["3-node-IPv6-dst-100000"]:
 473             (ret, stdout, stderr) = ssh.exec_command(
 474                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 475                 "--duration={1} -r {2} -s {3} -6 "
 476                 "--p{4}_src_start_ip 2001:1::1 "
 477                 "--p{4}_dst_start_ip 2001:2::0 "
 478                 "--p{4}_dst_end_ip 2001:2::1:869F "
 479                 "--p{5}_src_start_ip 2001:2::1 "
 480                 "--p{5}_dst_start_ip 2001:1::0 "
 481                 "--p{5}_dst_end_ip 2001:1::1:869F "
 482                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 483                                                     duration, rate, framesize,
 484                                                     _p0, _p1, _async, _latency,
 485                                                     warmup_time),
 486                 timeout=int(duration)+60)
 487         elif traffic_type in ["3-node-IPv6-dst-1000000"]:
 488             (ret, stdout, stderr) = ssh.exec_command(
 489                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 490                 "--duration={1} -r {2} -s {3} -6 "
 491                 "--p{4}_src_start_ip 2001:1::1 "
 492                 "--p{4}_dst_start_ip 2001:2::0 "
 493                 "--p{4}_dst_end_ip 2001:2::F:423F "
 494                 "--p{5}_src_start_ip 2001:2::1 "
 495                 "--p{5}_dst_start_ip 2001:1::0 "
 496                 "--p{5}_dst_end_ip 2001:1::F:423F "
 497                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 498                                                     duration, rate, framesize,
 499                                                     _p0, _p1, _async, _latency,
 500                                                     warmup_time),
 501                 timeout=int(duration)+60)
 502         elif traffic_type in ["2-node-bridge"]:
 503             (ret, stdout, stderr) = ssh.exec_command(
 504                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 505                 "--duration={1} -r {2} -s {3} "
 506                 "--p{4}_src_start_ip 10.10.10.2 "
 507                 "--p{4}_src_end_ip 10.10.10.254 "
 508                 "--p{4}_dst_start_ip 20.20.20.2 "
 509                 "--p{5}_src_start_ip 20.20.20.2 "
 510                 "--p{5}_src_end_ip 20.20.20.254 "
 511                 "--p{5}_dst_start_ip 10.10.10.2 "
 512                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 513                                                     duration, rate, framesize,
 514                                                     _p0, _p1, _async, _latency,
 515                                                     warmup_time),
 516                 timeout = int(duration) + 60)
 517         else:
 518             raise NotImplementedError('Unsupported traffic type')
 519
 520         logger.trace(ret)
 521         logger.trace(stdout)
 522         logger.trace(stderr)
 523
 524         if int(ret) != 0:
 525             raise RuntimeError('T-rex stateless runtime error')
 526         elif async_call:
 527             #no result
 528             self._received = None
 529             self._sent = None
 530             self._loss = None
 531             self._latency = None
 532         else:
 533             # last line from console output
 534             line = stdout.splitlines()[-1]
 535
 536             self._result = line
 537             logger.info('TrafficGen result: {0}'.format(self._result))
 538
 539             self._received = self._result.split(', ')[1].split('=')[1]
 540             self._sent = self._result.split(', ')[2].split('=')[1]
 541             self._loss = self._result.split(', ')[3].split('=')[1]
 542
 543             self._latency = []
 544             self._latency.append(self._result.split(', ')[4].split('=')[1])
 545             self._latency.append(self._result.split(', ')[5].split('=')[1])
 546
 547     def stop_traffic_on_tg(self):
 548         """Stop all traffic on TG.
 549
 550         :returns: Nothing
 551         :raises: RuntimeError if TG is not set.
 552         """
 553         if self._node is None:
 554             raise RuntimeError("TG is not set")
 555         if self._node['subtype'] == NodeSubTypeTG.TREX:
 556             self.trex_stl_stop_remote_exec(self._node)
 557
 558     def send_traffic_on_tg(self, duration, rate, framesize,
 559                            traffic_type, warmup_time=5, async_call=False,
 560                            latency=True):
 561         """Send traffic from all configured interfaces on TG.
 562
 563         :param duration: Duration of test traffic generation in seconds.
 564         :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...).
 565         :param framesize: Frame size (L2) in Bytes.
 566         :param traffic_type: Traffic profile.
 567         :param warmup_time: Warmup phase in seconds.
 568         :param async_call: Async mode.
 569         :param latency: With latency measurement.
 570         :type duration: str
 571         :type rate: str
 572         :type framesize: str
 573         :type traffic_type: str
 574         :type warmup_time: int
 575         :type async_call: bool
 576         :type latency: bool
 577         :returns: TG output.
 578         :rtype: str
 579         :raises: RuntimeError if TG is not set.
 580         :raises: RuntimeError if node is not TG or subtype is not specified.
 581         :raises: NotImplementedError if TG is not supported.
 582         """
 583
 584         node = self._node
 585         if node is None:
 586             raise RuntimeError("TG is not set")
 587
 588         if node['type'] != NodeType.TG:
 589             raise RuntimeError('Node type is not a TG')
 590
 591         if node['subtype'] is None:
 592             raise RuntimeError('TG subtype not defined')
 593         elif node['subtype'] == NodeSubTypeTG.TREX:
 594             self.trex_stl_start_remote_exec(duration, rate, framesize,
 595                                             traffic_type, async_call, latency,
 596                                             warmup_time=warmup_time)
 597         else:
 598             raise NotImplementedError("TG subtype not supported")
 599
 600         return self._result
 601
 602     def no_traffic_loss_occurred(self):
 603         """Fail if loss occurred in traffic run.
 604
 605         :returns: nothing
 606         :raises: Exception if loss occured.
 607         """
 608         if self._loss is None:
 609             raise Exception('The traffic generation has not been issued')
 610         if self._loss != '0':
 611             raise Exception('Traffic loss occurred: {0}'.format(self._loss))
 612
 613     def partial_traffic_loss_accepted(self, loss_acceptance,
 614                                       loss_acceptance_type):
 615         """Fail if loss is higher then accepted in traffic run.
 616
 617         :param loss_acceptance: Permitted drop ratio or frames count.
 618         :param loss_acceptance_type: Type of permitted loss.
 619         :type loss_acceptance: float
 620         :type loss_acceptance_type: LossAcceptanceType
 621         :returns: nothing
 622         :raises: Exception if loss is above acceptance criteria.
 623         """
 624         if self._loss is None:
 625             raise Exception('The traffic generation has not been issued')
 626
 627         if loss_acceptance_type == 'percentage':
 628             loss = (float(self._loss) / float(self._sent)) * 100
 629         elif loss_acceptance_type == 'frames':
 630             loss = float(self._loss)
 631         else:
 632             raise Exception('Loss acceptance type not supported')
 633
 634         if loss > float(loss_acceptance):
 635             raise Exception("Traffic loss {} above loss acceptance: {}".format(
 636                 loss, loss_acceptance))