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# Copyright (c) 2018 Cisco and/or its affiliates.
# 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.
"""Module defining ReceiveRateMeasurement class."""
class ReceiveRateMeasurement(object):
"""Structure defining the result of single Rr measurement."""
def __init__(self, duration, target_tr, transmit_count, loss_count):
"""Constructor, normalize primary and compute secondary quantities.
:param duration: Measurement duration [s].
:param target_tr: Target transmit rate [pps].
If bidirectional traffic is measured, this is bidirectional rate.
:param transmit_count: Number of packets transmitted [1].
:param loss_count: Number of packets transmitted but not received [1].
:type duration: float
:type target_tr: float
:type transmit_count: int
:type loss_count: int
"""
self.duration = float(duration)
self.target_tr = float(target_tr)
self.transmit_count = int(transmit_count)
self.loss_count = int(loss_count)
self.receive_count = transmit_count - loss_count
self.transmit_rate = transmit_count / self.duration
self.loss_rate = loss_count / self.duration
self.receive_rate = self.receive_count / self.duration
self.loss_fraction = float(self.loss_count) / self.transmit_count
# TODO: Do we want to store also the real time (duration + overhead)?
def __str__(self):
"""Return string reporting input and loss fraction."""
return "d={dur!s},Tr={rate!s},Df={frac!s}".format(
dur=self.duration, rate=self.target_tr, frac=self.loss_fraction)
def __repr__(self):
"""Return string evaluable as a constructor call."""
return ("ReceiveRateMeasurement(duration={dur!r},target_tr={rate!r}"
",transmit_count={trans!r},loss_count={loss!r})".format(
dur=self.duration, rate=self.target_tr,
trans=self.transmit_count, loss=self.loss_count))
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