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# Copyright 2016 Cisco Systems, Inc. All rights reserved.
#
# 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 abc
from nfvbench.log import LOG
import traffic_utils
class TrafficGeneratorException(Exception):
pass
class AbstractTrafficGenerator(object):
def __init__(self, config):
self.config = config
self.imix_l2_sizes = [64, 594, 1518]
self.imix_ratios = [7, 4, 1]
self.imix_avg_l2_size = 0
self.adjust_imix_min_size(64)
@abc.abstractmethod
def get_version(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def init(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def connect(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def config_interface(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def create_traffic(self, l2frame_size, rates, bidirectional, latency=True):
# Must be implemented by sub classes
return None
def modify_rate(self, rate, reverse):
port_index = int(reverse)
port = self.port_handle[port_index]
self.rates[port_index] = traffic_utils.to_rate_str(rate)
LOG.info('Modified traffic stream for %s, new rate=%s.', port,
traffic_utils.to_rate_str(rate))
def modify_traffic(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def get_stats(self):
# Must be implemented by sub classes
return None
def clear_traffic(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def start_traffic(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def stop_traffic(self):
# Must be implemented by sub classes
return None
@abc.abstractmethod
def cleanup(self):
# Must be implemented by sub classes
return None
def adjust_imix_min_size(self, min_size):
# assume the min size is always the first entry
self.imix_l2_sizes[0] = min_size
self.imix_avg_l2_size = sum(
[1.0 * imix[0] * imix[1] for imix in zip(self.imix_l2_sizes, self.imix_ratios)]) / sum(
self.imix_ratios)
traffic_utils.imix_avg_l2_size = self.imix_avg_l2_size
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