yardstick/network_services/vnf_generic/vnf/tg_rfc2544_trex.py

   1 # Copyright (c) 2016-2019 Intel Corporation
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #      http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 import logging
  16 import time
  17
  18 from six import moves
  19 from yardstick.common import utils
  20 from yardstick.network_services.vnf_generic.vnf import sample_vnf
  21 from yardstick.network_services.vnf_generic.vnf import tg_trex
  22 from trex_stl_lib.trex_stl_exceptions import STLError
  23
  24
  25 LOG = logging.getLogger(__name__)
  26
  27
  28 class TrexRfcResourceHelper(tg_trex.TrexResourceHelper):
  29
  30     SAMPLING_PERIOD = 2
  31     TRANSIENT_PERIOD = 10
  32
  33     def __init__(self, setup_helper):
  34         super(TrexRfcResourceHelper, self).__init__(setup_helper)
  35         self.rfc2544_helper = sample_vnf.Rfc2544ResourceHelper(
  36             self.scenario_helper)
  37
  38     def _run_traffic_once(self, traffic_profile):
  39         self.client_started.value = 1
  40         ports, port_pg_id = traffic_profile.execute_traffic(self)
  41
  42         samples = []
  43         timeout = int(traffic_profile.config.duration) - self.TRANSIENT_PERIOD
  44         time.sleep(self.TRANSIENT_PERIOD)
  45         for _ in utils.Timer(timeout=timeout):
  46             samples.append(self._get_samples(ports, port_pg_id=port_pg_id))
  47             time.sleep(self.SAMPLING_PERIOD)
  48
  49         traffic_profile.stop_traffic(self)
  50         completed, output = traffic_profile.get_drop_percentage(
  51             samples, self.rfc2544_helper.tolerance_low,
  52             self.rfc2544_helper.tolerance_high,
  53             self.rfc2544_helper.correlated_traffic,
  54             self.rfc2544_helper.resolution)
  55         self._queue.put(output)
  56         return completed
  57
  58     def start_client(self, ports, mult=None, duration=None, force=True):
  59         self.client.start(ports=ports, mult=mult, duration=duration, force=force)
  60
  61     def clear_client_stats(self, ports):
  62         self.client.clear_stats(ports=ports)
  63
  64     def run_test(self, traffic_profile, tasks_queue, results_queue, *args): # pragma: no cover
  65         LOG.debug("Trex resource_helper run_test")
  66         if self._terminated.value:
  67             return
  68         # if we don't do this we can hang waiting for the queue to drain
  69         # have to do this in the subprocess
  70         self._queue.cancel_join_thread()
  71         try:
  72             self._build_ports()
  73             self.client = self._connect()
  74             self.client.reset(ports=self.all_ports)
  75             self.client.remove_all_streams(self.all_ports)  # remove all streams
  76             traffic_profile.register_generator(self)
  77
  78             completed = False
  79             self.rfc2544_helper.iteration.value = 0
  80             self.client_started.value = 1
  81             while completed is False and not self._terminated.value:
  82                 LOG.debug("Wait for task ...")
  83                 try:
  84                     task = tasks_queue.get(True, 5)
  85                 except moves.queue.Empty:
  86                     LOG.debug("Wait for task timeout, continue waiting...")
  87                     continue
  88                 else:
  89                     if task != 'RUN_TRAFFIC':
  90                         continue
  91                 self.rfc2544_helper.iteration.value += 1
  92                 LOG.info("Got %s task, start iteration %d", task,
  93                          self.rfc2544_helper.iteration.value)
  94                 completed = self._run_traffic_once(traffic_profile)
  95                 if completed:
  96                     LOG.debug("%s::run_test - test completed",
  97                               self.__class__.__name__)
  98                     results_queue.put('COMPLETE')
  99                 else:
 100                     results_queue.put('CONTINUE')
 101                 tasks_queue.task_done()
 102
 103             self.client.stop(self.all_ports)
 104             self.client.disconnect()
 105             self._terminated.value = 0
 106         except STLError:
 107             if self._terminated.value:
 108                 LOG.debug("traffic generator is stopped")
 109                 return  # return if trex/tg server is stopped.
 110             raise
 111
 112         self.client_started.value = 0
 113         LOG.debug("%s::run_test done", self.__class__.__name__)
 114
 115 class TrexTrafficGenRFC(tg_trex.TrexTrafficGen):
 116     """
 117     This class handles mapping traffic profile and generating
 118     traffic for rfc2544 testcase.
 119     """
 120
 121     def __init__(self, name, vnfd, setup_env_helper_type=None, resource_helper_type=None):
 122         if resource_helper_type is None:
 123             resource_helper_type = TrexRfcResourceHelper
 124
 125         super(TrexTrafficGenRFC, self).__init__(name, vnfd, setup_env_helper_type,
 126                                                 resource_helper_type)