Source code for wlauto.workloads.stress_ng

#    Copyright 2015 ARM Limited
# 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
# pylint: disable=attribute-defined-outside-init
import os
import yaml

from wlauto import Workload, Parameter, Executable
from wlauto.exceptions import WorkloadError, ConfigError

[docs]class StressNg(Workload): name = 'stress_ng' description = """ stress-ng will stress test a computer system in various selectable ways. It was designed to exercise various physical subsystems of a computer as well as the various operating system kernel interfaces. stress-ng can also measure test throughput rates; this can be useful to observe performance changes across different operating system releases or types of hardware. However, it has never been intended to be used as a precise benchmark test suite, so do NOT use it in this manner. The official website for stress-ng is at: Source code are available from: """ parameters = [ Parameter('stressor', kind=str, default='cpu', allowed_values=['cpu', 'io', 'fork', 'switch', 'vm', 'pipe', 'yield', 'hdd', 'cache', 'sock', 'fallocate', 'flock', 'affinity', 'timer', 'dentry', 'urandom', 'sem', 'open', 'sigq', 'poll'], description='Stress test case name. The cases listed in ' 'allowed values come from the stable release ' 'version 0.01.32. The binary included here ' 'compiled from dev version 0.06.01. Refer to ' 'man page for the definition of each stressor.'), Parameter('threads', kind=int, default=0, description='The number of workers to run. Specifying a ' 'negative or zero value will select the number ' 'of online processors.'), Parameter('duration', kind=int, default=60, description='Timeout for test execution in seconds') ] def initialize(self, context): if not self.device.is_rooted: raise WorkloadError('stress-ng requires root premissions to run') def validate(self): if self.stressor == 'vm' and self.duration < 60: raise ConfigError('vm test duration need to be >= 60s.')
[docs] def setup(self, context): host_binary = context.resolver.get(Executable(self, self.device.abi, 'stress-ng')) self.binary = self.device.install_if_needed(host_binary) self.log = self.device.path.join(self.device.working_directory, 'stress_ng_output.txt') self.results = self.device.path.join(self.device.working_directory, 'stress_ng_results.yaml') self.command = ('{} --{} {} --timeout {}s --log-file {} --yaml {} ' '--metrics-brief --verbose' .format(self.binary, self.stressor, self.threads, self.duration, self.log, self.results)) self.timeout = self.duration + 10
[docs] def run(self, context): self.output = self.device.execute(self.command, timeout=self.timeout, as_root=True)
[docs] def update_result(self, context): host_file_log = os.path.join(context.output_directory, 'stress_ng_output.txt') host_file_results = os.path.join(context.output_directory, 'stress_ng_results.yaml') self.device.pull_file(self.log, host_file_log) self.device.pull_file(self.results, host_file_results) with open(host_file_results, 'r') as stress_ng_results: results = yaml.load(stress_ng_results) try: metric = results['metrics'][0]['stressor'] throughput = results['metrics'][0]['bogo-ops'] context.result.add_metric(metric, throughput, 'ops') # For some stressors like vm, if test duration is too short, stress_ng # may not able to produce test throughput rate. except TypeError: self.logger.warning('{} test throughput rate not found. ' 'Please increase test duration and retry.' .format(self.stressor))