73 lines
2.5 KiB
Python
73 lines
2.5 KiB
Python
# Copyright 2016: Mirantis Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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SLA (Service-level agreement) is set of details for determining compliance
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with contracted values such as maximum error rate or minimum response time.
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"""
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from __future__ import division
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from rally.common import streaming_algorithms
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from rally import consts
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from rally.task import sla
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from rally.utils import strutils
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@sla.configure(name="performance_degradation")
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class PerformanceDegradation(sla.SLA):
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"""Calculates performance degradation based on iteration time
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This SLA plugin finds minimum and maximum duration of
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iterations completed without errors during Rally task execution.
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Assuming that minimum duration is 100%, it calculates
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performance degradation against maximum duration.
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"""
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CONFIG_SCHEMA = {
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"type": "object",
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"$schema": consts.JSON_SCHEMA7,
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"properties": {
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"max_degradation": {
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"type": "number",
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"minimum": 0.0,
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},
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},
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"required": [
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"max_degradation",
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],
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"additionalProperties": False,
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}
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def __init__(self, criterion_value):
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super(PerformanceDegradation, self).__init__(criterion_value)
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self.max_degradation = self.criterion_value["max_degradation"]
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self.degradation = streaming_algorithms.DegradationComputation()
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def add_iteration(self, iteration):
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if not iteration.get("error"):
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self.degradation.add(iteration["duration"])
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self.success = self.degradation.result() <= self.max_degradation
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return self.success
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def merge(self, other):
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self.degradation.merge(other.degradation)
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self.success = self.degradation.result() <= self.max_degradation
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return self.success
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def details(self):
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res = strutils.format_float_to_str(self.degradation.result() or 0.0)
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return "Current degradation: %s%% - %s" % (res, self.status())
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