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# Copyright 2014: Mirantis 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.
# yardstick comment: this is a modified copy of
# rally/rally/benchmark/runners/constant.py
"""A runner that every run arithmetically steps specified input value(s) to
the scenario. This just means step value(s) is added to the previous value(s).
It is possible to combine several named input values and run with those either
as nested for loops or combine each i:th index of each "input value list"
until the end of the shortest list is reached (optimally all lists should be
defined with the same number of values when using such iter_type).
"""
from __future__ import absolute_import
import itertools
import logging
import multiprocessing
import os
import time
import traceback
import six
from six.moves import range
from yardstick.benchmark.runners import base
from yardstick.common import exceptions as y_exc
LOG = logging.getLogger(__name__)
def _worker_process(queue, cls, method_name, scenario_cfg,
context_cfg, aborted, output_queue):
sequence = 1
runner_cfg = scenario_cfg['runner']
interval = runner_cfg.get("interval", 1)
if 'options' in scenario_cfg:
options = scenario_cfg['options']
else: # options must be instatiated if not present in yaml
options = {}
scenario_cfg['options'] = options
runner_cfg['runner_id'] = os.getpid()
LOG.info("worker START, class %s", cls)
benchmark = cls(scenario_cfg, context_cfg)
benchmark.setup()
method = getattr(benchmark, method_name)
sla_action = None
if "sla" in scenario_cfg:
sla_action = scenario_cfg["sla"].get("action", "assert")
# To both be able to include the stop value and handle backwards stepping
def margin(start, stop):
return -1 if start > stop else 1
param_iters = \
[range(d['start'], d['stop'] + margin(d['start'], d['stop']),
d['step']) for d in runner_cfg['iterators']]
param_names = [d['name'] for d in runner_cfg['iterators']]
iter_type = runner_cfg.get("iter_type", "nested_for_loops")
if iter_type == 'nested_for_loops':
# Create a complete combination set of all parameter lists
loop_iter = itertools.product(*param_iters)
elif iter_type == 'tuple_loops':
# Combine each i;th index of respective parameter list
loop_iter = six.moves.zip(*param_iters)
else:
LOG.warning("iter_type unrecognized: %s", iter_type)
raise TypeError("iter_type unrecognized: %s" % iter_type)
# Populate options and run the requested method for each value combination
for comb_values in loop_iter:
if aborted.is_set():
break
LOG.debug("runner=%(runner)s seq=%(sequence)s START",
{"runner": runner_cfg["runner_id"], "sequence": sequence})
for i, value in enumerate(comb_values):
options[param_names[i]] = value
data = {}
errors = ""
try:
result = method(data)
except y_exc.SLAValidationError as error:
# SLA validation failed in scenario, determine what to do now
if sla_action == "assert":
raise
elif sla_action == "monitor":
LOG.warning("SLA validation failed: %s", error.args)
errors = error.args
except Exception as e: # pylint: disable=broad-except
errors = traceback.format_exc()
LOG.exception(e)
else:
if result:
output_queue.put(result)
time.sleep(interval)
benchmark_output = {
'timestamp': time.time(),
'sequence': sequence,
'data': data,
'errors': errors
}
queue.put(benchmark_output)
LOG.debug("runner=%(runner)s seq=%(sequence)s END",
{"runner": runner_cfg["runner_id"], "sequence": sequence})
sequence += 1
if errors and sla_action is None:
break
try:
benchmark.teardown()
except Exception:
# catch any exception in teardown and convert to simple exception
# never pass exceptions back to multiprocessing, because some exceptions can
# be unpicklable
# https://bugs.python.org/issue9400
LOG.exception("")
raise SystemExit(1)
LOG.info("worker END")
LOG.debug("queue.qsize() = %s", queue.qsize())
LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
class ArithmeticRunner(base.Runner):
"""Run a scenario arithmetically stepping input value(s)
Parameters
interval - time to wait between each scenario invocation
type: int
unit: seconds
default: 1 sec
iter_type: - Iteration type of input parameter(s): nested_for_loops
or tuple_loops
type: string
unit: na
default: nested_for_loops
-
name - name of scenario option that will be increased for each invocation
type: string
unit: na
default: na
start - value to use in first invocation of scenario
type: int
unit: na
default: none
stop - value indicating end of invocation. Can be set to same
value as start for one single value.
type: int
unit: na
default: none
step - value added to start value in next invocation of scenario.
Must not be set to zero. Can be set negative if start > stop
type: int
unit: na
default: none
-
name - and so on......
"""
__execution_type__ = 'Arithmetic'
def _run_benchmark(self, cls, method, scenario_cfg, context_cfg):
name = "{}-{}-{}".format(self.__execution_type__, scenario_cfg.get("type"), os.getpid())
self.process = multiprocessing.Process(
name=name,
target=_worker_process,
args=(self.result_queue, cls, method, scenario_cfg,
context_cfg, self.aborted, self.output_queue))
self.process.start()
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