# 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
#
# 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.
#
import os
import re
import json
import tarfile
from collections import OrderedDict
from subprocess import CalledProcessError
from wlauto import Workload, Parameter, Executable, File
from wlauto.exceptions import WorkloadError, ResourceError
from wlauto.instrumentation import instrument_is_enabled
from wlauto.utils.misc import check_output
RAW_OUTPUT_FILENAME = 'raw-output.txt'
TARBALL_FILENAME = 'rtapp-logs.tar.gz'
BINARY_NAME = 'rt-app'
PACKAGED_USE_CASE_DIRECTORY = os.path.abspath(os.path.join(os.path.dirname(__file__), 'use_cases'))
PLOAD_REGEX = re.compile(r'pLoad = (\d+)(\w+) : calib_cpu (\d+)')
ERROR_REGEX = re.compile(r'error')
CRIT_REGEX = re.compile(r'crit')
[docs]class RtApp(Workload):
# pylint: disable=no-member,attribute-defined-outside-init
name = 'rt-app'
description = """
A test application that simulates configurable real-time periodic load.
rt-app is a test application that starts multiple periodic threads in order to
simulate a real-time periodic load. It supports SCHED_OTHER, SCHED_FIFO,
SCHED_RR as well as the AQuoSA framework and SCHED_DEADLINE.
The load is described using JSON-like config files. Below are a couple of simple
examples.
Simple use case which creates a thread that run 1ms then sleep 9ms
until the use case is stopped with Ctrl+C:
.. code-block:: json
{
"tasks" : {
"thread0" : {
"loop" : -1,
"run" : 20000,
"sleep" : 80000
}
},
"global" : {
"duration" : 2,
"calibration" : "CPU0",
"default_policy" : "SCHED_OTHER",
"pi_enabled" : false,
"lock_pages" : false,
"logdir" : "./",
"log_basename" : "rt-app1",
"ftrace" : false,
"gnuplot" : true,
}
}
Simple use case with 2 threads that runs for 10 ms and wake up each
other until the use case is stopped with Ctrl+C
.. code-block:: json
{
"tasks" : {
"thread0" : {
"loop" : -1,
"run" : 10000,
"resume" : "thread1",
"suspend" : "thread0"
},
"thread1" : {
"loop" : -1,
"run" : 10000,
"resume" : "thread0",
"suspend" : "thread1"
}
}
}
Please refer to the existing configs in ``$WA_ROOT/wlauto/workloads/rt_app/use_case``
for more examples.
The version of rt-app currently used with this workload contains enhancements and
modifications done by Linaro. The source code for this version may be obtained here:
http://git.linaro.org/power/rt-app.git
The upstream version of rt-app is hosted here:
https://github.com/scheduler-tools/rt-app
"""
parameters = [
Parameter('config', kind=str, default='taskset',
description='''
Use case configuration file to run with rt-app. This may be
either the name of one of the "standard" configurations included
with the workload. or a path to a custom JSON file provided by
the user. Either way, the ".json" extension is implied and will
be added automatically if not specified in the argument.
The following is the list of standard configurations currently
included with the workload: {}
'''.format(', '.join(os.listdir(PACKAGED_USE_CASE_DIRECTORY)))),
Parameter('duration', kind=int,
description='''
Duration of the workload execution in Seconds. If specified, this
will override the corresponding parameter in the JSON config.
'''),
Parameter('taskset_mask', kind=int,
description='Constrain execution to specific CPUs.'),
Parameter('uninstall_on_exit', kind=bool, default=False,
description="""
If set to ``True``, rt-app binary will be uninstalled from the device
at the end of the run.
"""),
Parameter('force_install', kind=bool, default=False,
description="""
If set to ``True``, rt-app binary will always be deployed to the
target device at the beginning of the run, regardless of whether it
was already installed there.
"""),
]
def initialize(self, context):
# initialize() runs once per run. setting a class variable to make it
# available to other instances of the workload
RtApp.device_working_directory = self.device.path.join(self.device.working_directory,
'rt-app-working')
RtApp.host_binary = context.resolver.get(Executable(self,
self.device.abi,
BINARY_NAME), strict=False)
RtApp.workgen_script = context.resolver.get(File(self, 'workgen'))
if not self.device.is_rooted: # some use cases require root privileges
raise WorkloadError('rt-app requires the device to be rooted.')
self.device.execute('mkdir -p {}'.format(self.device_working_directory))
self._deploy_rt_app_binary_if_necessary()
[docs] def setup(self, context):
self.log_basename = context.spec.label
self.host_json_config = self._load_json_config(context)
self.config_file_on_device = self.device.path.join(self.device_working_directory,
os.path.basename(self.host_json_config))
self.device.push_file(self.host_json_config, self.config_file_on_device, timeout=60)
self.command = '{} {}'.format(self.device_binary, self.config_file_on_device)
time_buffer = 30
self.timeout = self.duration + time_buffer
[docs] def run(self, context):
self.output = self.device.invoke(self.command,
on_cpus=self.taskset_mask,
timeout=self.timeout,
as_root=True)
[docs] def update_result(self, context):
self._pull_rt_app_logs(context)
context.result.classifiers.update(dict(
duration=self.duration,
task_count=self.task_count,
))
outfile = os.path.join(context.output_directory, RAW_OUTPUT_FILENAME)
with open(outfile, 'w') as wfh:
wfh.write(self.output)
error_count = 0
crit_count = 0
for line in self.output.split('\n'):
match = PLOAD_REGEX.search(line)
if match:
pload_value = match.group(1)
pload_unit = match.group(2)
calib_cpu_value = match.group(3)
context.result.add_metric('pLoad', float(pload_value), pload_unit)
context.result.add_metric('calib_cpu', float(calib_cpu_value))
error_match = ERROR_REGEX.search(line)
if error_match:
error_count += 1
crit_match = CRIT_REGEX.search(line)
if crit_match:
crit_count += 1
context.result.add_metric('error_count', error_count, 'count')
context.result.add_metric('crit_count', crit_count, 'count')
def finalize(self, context):
if self.uninstall_on_exit:
self.device.uninstall(self.device_binary)
self.device.execute('rm -rf {}'.format(self.device_working_directory))
def _deploy_rt_app_binary_if_necessary(self):
# called from initialize() so gets invoked once per run
RtApp.device_binary = self.device.get_binary_path("rt-app")
if self.force_install or not RtApp.device_binary:
if not self.host_binary:
message = '''rt-app is not installed on the device and could not be
found in workload resources'''
raise ResourceError(message)
RtApp.device_binary = self.device.install(self.host_binary)
def _load_json_config(self, context):
user_config_file = self._get_raw_json_config(context.resolver)
config_file = self._generate_workgen_config(user_config_file,
context.output_directory)
with open(config_file) as fh:
config_data = json.load(fh, object_pairs_hook=OrderedDict)
self._update_rt_app_config(config_data)
self.duration = config_data['global'].get('duration', 0)
self.task_count = len(config_data.get('tasks', []))
with open(config_file, 'w') as wfh:
json.dump(config_data, wfh, indent=4)
return config_file
def _get_raw_json_config(self, resolver):
if os.path.splitext(self.config)[1] != '.json':
self.config += '.json'
if os.path.isfile(self.config):
return os.path.abspath(self.config)
partial_path = os.path.join('use_cases', self.config)
return resolver.get(File(self, partial_path))
def _generate_workgen_config(self, user_file, output_directory):
output_file = os.path.join(output_directory, 'unkind.json')
# use workgen dry run option to generate a use case
# file with proper JSON grammar on host first
try:
check_output('python {} -d -o {} {}'.format(self.workgen_script,
output_file,
user_file),
shell=True)
except CalledProcessError as e:
message = 'Could not generate config using workgen, got "{}"'
raise WorkloadError(message.format(e))
return output_file
def _update_rt_app_config(self, config_data):
config_data['global'] = config_data.get('global', {})
config_data['global']['logdir'] = self.device_working_directory
config_data['global']['log_basename'] = self.log_basename
if self.duration is not None:
config_data['global']['duration'] = self.duration
def _pull_rt_app_logs(self, context):
tar_command = '{} tar czf {}/{} -C {} .'.format(self.device.busybox,
self.device_working_directory,
TARBALL_FILENAME,
self.device_working_directory)
self.device.execute(tar_command, timeout=300)
device_path = self.device.path.join(self.device_working_directory, TARBALL_FILENAME)
host_path = os.path.join(context.output_directory, TARBALL_FILENAME)
self.device.pull_file(device_path, host_path, timeout=120)
with tarfile.open(host_path, 'r:gz') as tf:
tf.extractall(context.output_directory)
os.remove(host_path)
self.device.execute('rm -rf {}/*'.format(self.device_working_directory))