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https://github.com/ARM-software/workload-automation.git
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89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
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# Copyright 2017 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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from devlib import HwmonInstrument as _Instrument
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from wa import Instrument
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from wa.framework.instrumentation import fast
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MOMENTARY_QUANTITIES = ['temperature', 'power', 'voltage', 'current', 'fps']
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CUMULATIVE_QUANTITIES = ['energy', 'tx', 'tx/rx', 'frames']
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class HwmonInstrument(Instrument):
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name = 'hwmon'
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description = """
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Hardware Monitor (hwmon) is a generic Linux kernel subsystem,
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providing access to hardware monitoring components like temperature or
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voltage/current sensors.
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Data from hwmon that are a snapshot of a fluctuating value, such as
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temperature and voltage, are reported once at the beginning and once at the
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end of the workload run. Data that are a cumulative total of a quantity,
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such as energy (which is the cumulative total of power consumption), are
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reported as the difference between the values at the beginning and at the
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end of the workload run.
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There is currently no functionality to filter sensors: all of the available
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hwmon data will be reported.
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"""
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def initialize(self, context):
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self.instrument = _Instrument(self.target)
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def setup(self, context):
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self.instrument.reset()
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@fast
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def start(self, context):
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self.before = self.instrument.take_measurement()
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@fast
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def stop(self, context):
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self.after = self.instrument.take_measurement()
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def update_result(self, context):
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measurements_before = {m.channel.label: m for m in self.before}
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measurements_after = {m.channel.label: m for m in self.after}
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if measurements_before.keys() != measurements_after.keys():
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self.logger.warning(
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'hwmon before/after measurements returned different entries!')
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for label, measurement_after in measurements_after.iteritems():
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if label not in measurements_before:
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continue # We've already warned about this
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measurement_before = measurements_before[label]
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if measurement_after.channel.kind in MOMENTARY_QUANTITIES:
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context.add_metric('{}_before'.format(label),
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measurement_before.value,
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measurement_before.channel.units)
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context.add_metric('{}_after'.format(label),
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measurement_after.value,
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measurement_after.channel.units)
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elif measurement_after.channel.kind in CUMULATIVE_QUANTITIES:
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diff = measurement_after.value - measurement_before.value
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context.add_metric(label, diff, measurement_after.channel.units)
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else:
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self.logger.warning(
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"Don't know what to do with hwmon channel '{}'"
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.format(measurement_after.channel))
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def teardown(self, context):
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self.instrument.teardown()
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