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# Copyright (c) 2016-2017 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 re
from yardstick.common import exceptions
from yardstick.common import utils
class TrafficProfileConfig(object):
"""Class to contain the TrafficProfile class information
This object will parse and validate the traffic profile information.
"""
DEFAULT_SCHEMA = 'nsb:traffic_profile:0.1'
DEFAULT_FRAME_RATE = '100'
DEFAULT_DURATION = 30
RATE_FPS = 'fps'
RATE_PERCENTAGE = '%'
RATE_REGEX = re.compile(r'([0-9]*\.[0-9]+|[0-9]+)\s*(fps|%)*(.*)')
def __init__(self, tp_config):
self.schema = tp_config.get('schema', self.DEFAULT_SCHEMA)
self.name = tp_config.get('name')
self.description = tp_config.get('description')
tprofile = tp_config['traffic_profile']
self.traffic_type = tprofile.get('traffic_type')
self.frame_rate, self.rate_unit = self.parse_rate(
tprofile.get('frame_rate', self.DEFAULT_FRAME_RATE))
self.test_precision = tprofile.get('test_precision')
self.packet_sizes = tprofile.get('packet_sizes')
self.duration = tprofile.get('duration', self.DEFAULT_DURATION)
self.lower_bound = tprofile.get('lower_bound')
self.upper_bound = tprofile.get('upper_bound')
self.step_interval = tprofile.get('step_interval')
self.enable_latency = tprofile.get('enable_latency', False)
def parse_rate(self, rate):
"""Parse traffic profile rate
The line rate can be defined in fps or percentage over the maximum line
rate:
- frame_rate = 5000 (by default, unit is 'fps')
- frame_rate = 5000fps
- frame_rate = 25%
:param rate: (string, int) line rate in fps or %
:return: (tuple: int, string) line rate number and unit
"""
match = self.RATE_REGEX.match(str(rate))
if not match:
exceptions.TrafficProfileRate()
rate = float(match.group(1))
unit = match.group(2) if match.group(2) else self.RATE_FPS
if match.group(3):
raise exceptions.TrafficProfileRate()
return rate, unit
class TrafficProfile(object):
"""
This class defines the behavior
"""
UPLINK = "uplink"
DOWNLINK = "downlink"
@staticmethod
def get(tp_config):
"""Get the traffic profile instance for the given traffic type
:param tp_config: loaded YAML file
:return:
"""
profile_class = tp_config["traffic_profile"]["traffic_type"]
try:
return next(c for c in utils.itersubclasses(TrafficProfile)
if c.__name__ == profile_class)(tp_config)
except StopIteration:
raise exceptions.TrafficProfileNotImplemented(
profile_class=profile_class)
def __init__(self, tp_config):
# e.g. RFC2544 start_ip, stop_ip, drop_rate,
# IMIX = {"10K": 0.1, "100M": 0.5}
self.params = tp_config
self.config = TrafficProfileConfig(tp_config)
def is_ended(self):
return False
def execute_traffic(self, traffic_generator, **kawrgs):
""" This methods defines the behavior of the traffic generator.
It will be called in a loop until the traffic generator exits.
:param traffic_generator: TrafficGen instance
:return: None
"""
raise NotImplementedError()
class DummyProfile(TrafficProfile):
"""
This is an empty TrafficProfile implementation - if it is used,
the traffic will be completely handled by the Traffic Generator
implementation with no regard for the Traffic Profile.
"""
def execute(self, traffic_generator):
pass
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