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# Copyright (c) 2016-2019 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import time
from six import moves
from yardstick.common import utils
from yardstick.network_services.vnf_generic.vnf import sample_vnf
from yardstick.network_services.vnf_generic.vnf import tg_trex
from trex_stl_lib.trex_stl_exceptions import STLError
LOG = logging.getLogger(__name__)
class TrexRfcResourceHelper(tg_trex.TrexResourceHelper):
SAMPLING_PERIOD = 2
TRANSIENT_PERIOD = 10
def __init__(self, setup_helper):
super(TrexRfcResourceHelper, self).__init__(setup_helper)
self.rfc2544_helper = sample_vnf.Rfc2544ResourceHelper(
self.scenario_helper)
def _run_traffic_once(self, traffic_profile):
self.client_started.value = 1
ports, port_pg_id = traffic_profile.execute_traffic(self)
samples = []
timeout = int(traffic_profile.config.duration) - self.TRANSIENT_PERIOD
time.sleep(self.TRANSIENT_PERIOD)
for _ in utils.Timer(timeout=timeout):
samples.append(self._get_samples(ports, port_pg_id=port_pg_id))
time.sleep(self.SAMPLING_PERIOD)
traffic_profile.stop_traffic(self)
completed, output = traffic_profile.get_drop_percentage(
samples, self.rfc2544_helper.tolerance_low,
self.rfc2544_helper.tolerance_high,
self.rfc2544_helper.correlated_traffic,
self.rfc2544_helper.resolution)
self._queue.put(output)
return completed
def start_client(self, ports, mult=None, duration=None, force=True):
self.client.start(ports=ports, mult=mult, duration=duration, force=force)
def clear_client_stats(self, ports):
self.client.clear_stats(ports=ports)
def run_test(self, traffic_profile, tasks_queue, results_queue, *args): # pragma: no cover
LOG.debug("Trex resource_helper run_test")
if self._terminated.value:
return
# if we don't do this we can hang waiting for the queue to drain
# have to do this in the subprocess
self._queue.cancel_join_thread()
try:
self._build_ports()
self.client = self._connect()
self.client.reset(ports=self.all_ports)
self.client.remove_all_streams(self.all_ports) # remove all streams
traffic_profile.register_generator(self)
completed = False
self.rfc2544_helper.iteration.value = 0
self.client_started.value = 1
while completed is False and not self._terminated.value:
LOG.debug("Wait for task ...")
try:
task = tasks_queue.get(True, 5)
except moves.queue.Empty:
LOG.debug("Wait for task timeout, continue waiting...")
continue
else:
if task != 'RUN_TRAFFIC':
continue
self.rfc2544_helper.iteration.value += 1
LOG.info("Got %s task, start iteration %d", task,
self.rfc2544_helper.iteration.value)
completed = self._run_traffic_once(traffic_profile)
if completed:
LOG.debug("%s::run_test - test completed",
self.__class__.__name__)
results_queue.put('COMPLETE')
else:
results_queue.put('CONTINUE')
tasks_queue.task_done()
self.client.stop(self.all_ports)
self.client.disconnect()
self._terminated.value = 0
except STLError:
if self._terminated.value:
LOG.debug("traffic generator is stopped")
return # return if trex/tg server is stopped.
raise
self.client_started.value = 0
LOG.debug("%s::run_test done", self.__class__.__name__)
class TrexTrafficGenRFC(tg_trex.TrexTrafficGen):
"""
This class handles mapping traffic profile and generating
traffic for rfc2544 testcase.
"""
def __init__(self, name, vnfd, setup_env_helper_type=None, resource_helper_type=None):
if resource_helper_type is None:
resource_helper_type = TrexRfcResourceHelper
super(TrexTrafficGenRFC, self).__init__(name, vnfd, setup_env_helper_type,
resource_helper_type)
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