Merge "code inspection fixes: test_pktgen"
[yardstick.git] / yardstick / benchmark / runners / iteration.py
1 # Copyright 2014: Mirantis Inc.
2 # All Rights Reserved.
3 #
4 #    Licensed under the Apache License, Version 2.0 (the "License"); you may
5 #    not use this file except in compliance with the License. You may obtain
6 #    a copy of the License at
7 #
8 #         http://www.apache.org/licenses/LICENSE-2.0
9 #
10 #    Unless required by applicable law or agreed to in writing, software
11 #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 #    License for the specific language governing permissions and limitations
14 #    under the License.
15
16 # yardstick comment: this is a modified copy of
17 # rally/rally/benchmark/runners/constant.py
18
19 """A runner that runs a configurable number of times before it returns
20 """
21
22 from __future__ import absolute_import
23 import os
24 import multiprocessing
25 import logging
26 import traceback
27 import time
28
29 from yardstick.benchmark.runners import base
30
31 LOG = logging.getLogger(__name__)
32
33
34 def _worker_process(queue, cls, method_name, scenario_cfg,
35                     context_cfg, aborted, output_queue):
36
37     sequence = 1
38
39     # if we don't do this we can hang waiting for the queue to drain
40     # have to do this in the subprocess
41     queue.cancel_join_thread()
42     output_queue.cancel_join_thread()
43
44     runner_cfg = scenario_cfg['runner']
45
46     interval = runner_cfg.get("interval", 1)
47     iterations = runner_cfg.get("iterations", 1)
48     run_step = runner_cfg.get("run_step", "setup,run,teardown")
49
50     delta = runner_cfg.get("delta", 2)
51     LOG.info("worker START, iterations %d times, class %s", iterations, cls)
52
53     runner_cfg['runner_id'] = os.getpid()
54
55     benchmark = cls(scenario_cfg, context_cfg)
56     if "setup" in run_step:
57         benchmark.setup()
58
59     method = getattr(benchmark, method_name)
60
61     sla_action = None
62     if "sla" in scenario_cfg:
63         sla_action = scenario_cfg["sla"].get("action", "assert")
64     if "run" in run_step:
65         while True:
66
67             LOG.debug("runner=%(runner)s seq=%(sequence)s START",
68                       {"runner": runner_cfg["runner_id"],
69                        "sequence": sequence})
70
71             data = {}
72             errors = ""
73
74             try:
75                 result = method(data)
76             except AssertionError as assertion:
77                 # SLA validation failed in scenario, determine what to do now
78                 if sla_action == "assert":
79                     raise
80                 elif sla_action == "monitor":
81                     LOG.warning("SLA validation failed: %s", assertion.args)
82                     errors = assertion.args
83                 elif sla_action == "rate-control":
84                     try:
85                         scenario_cfg['options']['rate']
86                     except KeyError:
87                         scenario_cfg.setdefault('options', {})
88                         scenario_cfg['options']['rate'] = 100
89
90                     scenario_cfg['options']['rate'] -= delta
91                     sequence = 1
92                     continue
93             except Exception as e:
94                 errors = traceback.format_exc()
95                 LOG.exception(e)
96             else:
97                 if result:
98                     output_queue.put(result)
99
100             time.sleep(interval)
101
102             benchmark_output = {
103                 'timestamp': time.time(),
104                 'sequence': sequence,
105                 'data': data,
106                 'errors': errors
107             }
108
109             queue.put(benchmark_output)
110
111             LOG.debug("runner=%(runner)s seq=%(sequence)s END",
112                       {"runner": runner_cfg["runner_id"],
113                        "sequence": sequence})
114
115             sequence += 1
116
117             if (errors and sla_action is None) or \
118                     (sequence > iterations or aborted.is_set()):
119                 LOG.info("worker END")
120                 break
121     if "teardown" in run_step:
122         benchmark.teardown()
123
124
125 class IterationRunner(base.Runner):
126     """Run a scenario for a configurable number of times
127
128 If the scenario ends before the time has elapsed, it will be started again.
129
130   Parameters
131     iterations - amount of times the scenario will be run for
132         type:    int
133         unit:    na
134         default: 1
135     interval - time to wait between each scenario invocation
136         type:    int
137         unit:    seconds
138         default: 1 sec
139     """
140     __execution_type__ = 'Iteration'
141
142     def _run_benchmark(self, cls, method, scenario_cfg, context_cfg):
143         self.process = multiprocessing.Process(
144             target=_worker_process,
145             args=(self.result_queue, cls, method, scenario_cfg,
146                   context_cfg, self.aborted, self.output_queue))
147         self.process.start()