mirror of
https://github.com/ARM-software/workload-automation.git
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4abbe7602a
This changeset adds the ability to sleep on the device via a device.sleep() method. This invokes sleep on the target device. This is useful for situations where the passage of time on the target device does not match that of the host, e.g., gem5. This changeset also updates a number of workloads to use this new sleep method.
138 lines
6.3 KiB
Python
138 lines
6.3 KiB
Python
# Copyright 2012-2015 ARM Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# pylint: disable=no-member
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# pylint: disable=attribute-defined-outside-init
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import os
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from wlauto import settings, Workload, Executable, Parameter
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from wlauto.exceptions import ConfigError, WorkloadError
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from wlauto.utils.types import boolean
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TXT_RESULT_NAME = 'cyclictest_result.txt'
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RESULT_INTERPRETATION = {
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'T': 'Thread',
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'P': 'Priority',
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'C': 'Clock',
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}
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class Cyclictest(Workload):
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name = 'cyclictest'
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description = """
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Measures the amount of time that passes between when a timer expires and
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when the thread which set the timer actually runs.
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Cyclic test works by taking a time snapshot just prior to waiting for a specific
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time interval (t1), then taking another time snapshot after the timer
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finishes (t2), then comparing the theoretical wakeup time with the actual
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wakeup time (t2 -(t1 + sleep_time)). This value is the latency for that
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timers wakeup.
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"""
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parameters = [
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Parameter('clock', allowed_values=['monotonic', 'realtime'], default='realtime',
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description=('specify the clock to be used during the test.')),
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Parameter('duration', kind=int, default=30,
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description=('Specify the length for the test to run in seconds.')),
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Parameter('quiet', kind=boolean, default=True,
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description=('Run the tests quiet and print only a summary on exit.')),
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Parameter('thread', kind=int, default=8,
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description=('Set the number of test threads')),
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Parameter('latency', kind=int, default=1000000,
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description=('Write the value to /dev/cpu_dma_latency')),
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Parameter('extra_parameters', kind=str, default="",
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description=('Any additional command line parameters to append to the '
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'existing parameters above. A list can be found at '
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'https://rt.wiki.kernel.org/index.php/Cyclictest or '
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'in the help page ``cyclictest -h``')),
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Parameter('clear_file_cache', kind=boolean, default=True,
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description=('Clear file caches before starting test')),
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Parameter('screen_off', kind=boolean, default=True,
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description=('If true it will turn the screen off so that onscreen '
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'graphics do not effect the score. This is predominantly '
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'for devices without a GPU')),
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]
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def setup(self, context):
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self.cyclictest_on_device = 'cyclictest'
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self.cyclictest_result = os.path.join(self.device.working_directory, TXT_RESULT_NAME)
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self.cyclictest_command = '{} --clock={} --duration={}s --thread={} --latency={} {} {} > {}'
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self.device_binary = None
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if not self.device.is_rooted:
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raise WorkloadError("This workload requires a device with root premissions to run")
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host_binary = context.resolver.get(Executable(self, self.device.abi, 'cyclictest'))
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self.device_binary = self.device.install(host_binary)
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self.cyclictest_command = self.cyclictest_command.format(self.device_binary,
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0 if self.clock == 'monotonic' else 1,
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self.duration,
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self.thread,
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self.latency,
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"--quiet" if self.quiet else "",
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self.extra_parameters,
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self.cyclictest_result)
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if self.clear_file_cache:
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self.device.execute('sync')
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self.device.set_sysfile_value('/proc/sys/vm/drop_caches', 3)
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if self.device.platform == 'android':
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if self.screen_off and self.device.is_screen_on:
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self.device.execute('input keyevent 26')
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def run(self, context):
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self.device.execute(self.cyclictest_command, self.duration * 2, as_root=True)
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def update_result(self, context):
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self.device.pull_file(self.cyclictest_result, context.output_directory)
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# Parsing the output
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# Standard Cyclictest Output:
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# T: 0 (31974) P:95 I:1000 C:4990 Min:9 Act:37 Avg:31 Max:59
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with open(os.path.join(context.output_directory, TXT_RESULT_NAME)) as f:
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for line in f:
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if line.find('C:') is not -1:
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# Key = T: 0 (31974) P:95 I:1000
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# Remaing = 49990 Min:9 Act:37 Avg:31 Max:59
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# sperator = C:
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(key, sperator, remaing) = line.partition('C:')
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index = key.find('T')
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key = key.replace(key[index], RESULT_INTERPRETATION['T'])
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index = key.find('P')
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key = key.replace(key[index], RESULT_INTERPRETATION['P'])
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index = sperator.find('C')
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sperator = sperator.replace(sperator[index], RESULT_INTERPRETATION['C'])
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metrics = (sperator + remaing).split()
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# metrics is now in the from of ['Min:', '9', 'Act:', '37', 'Avg:', '31' , 'Max', '59']
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for i in range(0, len(metrics), 2):
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full_key = key + ' ' + metrics[i][:-1]
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value = int(metrics[i + 1])
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context.result.add_metric(full_key, value, 'microseconds')
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def teardown(self, context):
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if self.device.platform == 'android':
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if self.screen_off:
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self.device.ensure_screen_is_on()
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self.device.execute('rm -f {}'.format(self.cyclictest_result))
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